fix(handlers): support thumbnail rendering for files needing thumbnails

Update `HasThumbnail` in `fileViewWithReactions` to evaluate to true if the file already has a thumbnail or if it is a file type that requires one (`jobs.NeedsThumbnail`). This ensures the download page renders the thumbnail element for files that are pending thumbnail generation or support dynamic thumbnails.

Additionally, update tests in `upload_stage3_test.go` to verify the thumbnail image is rendered and relax the OG image URL matching.

.env.example

@@ -9,6 +9,11 @@ WARPBOX_CLEANUP_ENABLED=true
 WARPBOX_CLEANUP_EVERY=1h
 WARPBOX_THUMBNAIL_ENABLED=true
 WARPBOX_THUMBNAIL_EVERY=1m
+WARPBOX_RESUMABLE_UPLOADS_ENABLED=true
+WARPBOX_RESUMABLE_CHUNK_MB=64
+WARPBOX_RESUMABLE_RETENTION_HOURS=1
+WARPBOX_RESUMABLE_CHUNK_MODE=same
+WARPBOX_RESUMABLE_CHUNK_PATH=
 WARPBOX_MAX_UPLOAD_SIZE_MB=16384
 WARPBOX_ANONYMOUS_UPLOADS_ENABLED=true
 WARPBOX_ANONYMOUS_MAX_UPLOAD_MB=512
@@ -27,6 +32,8 @@ WARPBOX_SHORT_WINDOW_REQUESTS=60
 WARPBOX_SHORT_WINDOW_SECONDS=60
 WARPBOX_ANONYMOUS_STORAGE_BACKEND=local
 WARPBOX_USER_STORAGE_BACKEND=local
-WARPBOX_READ_TIMEOUT=15s
+WARPBOX_READ_HEADER_TIMEOUT=15s
-WARPBOX_WRITE_TIMEOUT=60s
+WARPBOX_READ_TIMEOUT=0s
+WARPBOX_WRITE_TIMEOUT=0s
 WARPBOX_IDLE_TIMEOUT=120s
+WARPBOX_TRUSTED_PROXIES=

.gitignore

@@ -12,5 +12,8 @@ backend/static/uploads/*
 .env
 .env.*
 !.env.example
+.prod.env
 scripts/env/dev.env
 docker-compose.yml
+
+.claude

PLANS.md

@@ -0,0 +1,111 @@
+# Warpbox Plans & Staged Development
+
+This document captures the staged development history and roadmap for Warpbox. For day-to-day usage,
+configuration, and deployment, see [README.md](./README.md).
+
+## Stage 2 — Operator Tools
+
+- `/admin/login` - token-based admin login.
+- `/admin` - overview metrics: boxes, files, storage, recent uploads, protected/expired boxes.
+- `/admin/files` - recent upload table with view and delete actions.
+- Expired boxes and boxes that have reached their download limit are cleaned on startup and then
+  every `WARPBOX_CLEANUP_EVERY` when `WARPBOX_CLEANUP_ENABLED=true`.
+- Missing image/video thumbnails are generated in a background worker every `WARPBOX_THUMBNAIL_EVERY`
+  when `WARPBOX_THUMBNAIL_ENABLED=true`.
+
+## Stage 3 — Anonymous Integrations
+
+Anonymous uploads return a private management link at creation time. Keep that link secret: anyone
+with it can delete the entire upload box. The raw delete token is not stored and cannot be recovered
+later.
+
+Browser uploads still show `Open box` and `Copy URL` as the primary actions, with a smaller
+`Manage or delete this upload` link in the completion panel.
+
+Curl and custom uploaders can use the same endpoint:
+
+```bash
+# Terminal-friendly output: one plain box URL.
+curl -F file=@./report.pdf http://localhost:8080/api/v1/upload
+
+# JSON output with boxUrl, thumbnailUrl, manageUrl, deleteUrl, zipUrl, and file entries.
+curl -F sharex=@./screenshot.png \
+  -H 'Accept: application/json' \
+  http://localhost:8080/api/v1/upload
+```
+
+The upload endpoint accepts multipart fields named `file` and `sharex`. ShareX users can start from
+`examples/sharex/warpbox-anonymous.sxcu`; update `RequestURL` to match your instance URL.
+Authenticated uploads (your account's limits) add an `Authorization: Bearer <token>` header — mint a
+token under **Account → Access tokens**. The JSON response uses ShareX placeholders `{json:boxUrl}`
+(URL), `{json:thumbnailUrl}` (thumbnail), `{json:deleteUrl}` (deletion), and `{json:error}` (error
+message).
+
+### Grouping multiple files into one box (`X-Warpbox-Batch`)
+
+By default every uploaded file becomes its own box. To put several files in a **single** box, send
+the opt-in `X-Warpbox-Batch` header: requests that share the same header value (scoped per account,
+or per IP for anonymous uploads) within 20s are appended to the same box. This lets a multi-file
+ShareX selection — which ShareX sends as separate back-to-back requests — land as one shareable link.
+The shipped `.sxcu` sets `X-Warpbox-Batch: sharex`; remove that header for one box per file. Requests
+without the header behave exactly as before.
+
+### Resumable API flow
+
+Custom clients can use the resumable JSON API for large files:
+
+```bash
+# 1. Create a resumable session from file metadata.
+curl -s http://localhost:8080/api/v1/uploads/resumable \
+  -H 'Accept: application/json' \
+  -H 'Content-Type: application/json' \
+  -d '{"files":[{"name":"large.bin","size":1048576,"contentType":"application/octet-stream"}],"expiresMinutes":1440}'
+
+# 2. Upload exact-sized chunks using the returned sessionId, file id, and chunkSize.
+dd if=./large.bin bs=8388608 count=1 skip=0 2>/dev/null | \
+  curl -X PUT --data-binary @- \
+  http://localhost:8080/api/v1/uploads/resumable/SESSION_ID/files/FILE_ID/chunks/0
+
+# 3. Complete the session after all chunks are present.
+curl -X POST -H 'Accept: application/json' \
+  http://localhost:8080/api/v1/uploads/resumable/SESSION_ID/complete
+```
+
+The complete response is the same JSON shape as `POST /api/v1/upload`, including `boxUrl`,
+`manageUrl`, `deleteUrl`, and file URLs. Send `Authorization: Bearer <token>` on every resumable
+request to upload as an account.
+
+Browser resumable uploads are configurable from `/admin/settings`: enabled/disabled, chunk size in
+MB, draft retention hours, and chunk staging location. The default chunk mode stores temporary draft
+chunks under `data/tmp/uploads/{session_id}`. A custom mode can point those chunks at another local
+path, such as a mounted fast SSD. Chunk staging stays local even when the completed files are later
+finalized into S3/SFTP/SMB/WebDAV storage. Completion returns the share link immediately; files may
+show as `Processing` on the download page while the background finalizer streams them to the selected
+storage backend. Cleanup removes expired uploading drafts but skips sessions already in processing.
+
+## Stage 4 — Accounts + Personal Boxes
+
+- `/register` bootstraps the first admin account only when no users exist.
+- `/login` and `/logout` provide cookie-based web sessions.
+- `/app` is the personal dashboard for logged-in users, showing owned boxes, storage usage, upload
+  history, and flat collections. Uploading still happens from the homepage.
+- `/admin/users` lets admins create invite links, disable/reactivate users, and generate reset links.
+- Logged-in browser uploads from `/` still use `POST /api/v1/upload`, but the resulting box is stored
+  with owner and optional collection metadata.
+- Admin users are exempt from the global max upload size on the homepage upload flow. Future per-user
+  quotas should apply to this same upload path rather than creating a second uploader.
+- `/admin/settings` controls anonymous uploads, anonymous max upload size, daily upload caps, default
+  user storage quota, and usage retention.
+- `/admin/users` shows storage/daily usage and lets admins set per-user storage quota overrides.
+- `/admin/storage` manages the built-in local file backend and S3-compatible bucket backends.
+- `/admin/bans` manages manual IP/CIDR bans and optional automatic bans for suspicious probes and
+  repeated login failures. Auto-ban is off by default and configured from the admin UI.
+- Upload limits now include daily bytes, daily box counts, active box counts, short-window request
+  limits, max expiration days, local storage capacity in GB, and per-user policy overrides.
+- Uploaded file content, thumbnails, and private box metadata use the selected storage backend. The
+  bbolt database and JSON logs remain local under `./data/db` and `./data/logs`.
+- Anonymous uploads, ShareX uploads, unlisted public box links, password protection, expiry, delete
+  tokens, thumbnails, and cleanup continue to work as before.
+
+Email delivery is intentionally deferred. Invite and reset links are copyable today; future SMTP
+support will power public forgot-password and optional email delivery.

README.md

@@ -1,6 +1,20 @@
 # Warpbox.dev
 
-This repository contains the Go backend base for `warpbox.dev`, a self-hosted transfer-first file sharing application.
+Warpbox is a self-hosted, transfer first file sharing application written in Go. It renders
+server side templates and serves static assets directly.
+
+## Features
+
+- Anonymous and authenticated uploads from the browser, `curl`, or ShareX.
+- Warpbox-native resumable uploads with a JSON API for large files.
+- Upload boxes with expiry, optional download limits, password protection, and one time delete tokens.
+- User accounts with personal dashboards, collections, storage quotas, and invite based registration.
+- Admin tooling for metrics, file management, storage backends, upload policy, and IP bans.
+- Local and S3 compatible storage backends.
+- Background jobs for cleanup and thumbnail generation.
+- Emoji reaction packs loaded from the runtime data directory.
+
+> Looking for the roadmap and the staged development history? See [PLANS.md](./PLANS.md).
 
 ## Run
 
@@ -10,11 +24,25 @@ This repository contains the Go backend base for `warpbox.dev`, a self-hosted tr
 
 The default server listens on `:8080`.
 
-Upload size limits are configured in megabytes through `WARPBOX_MAX_UPLOAD_SIZE_MB`.
+For one off Go commands, run them from the backend module:
-Fractions are supported, so `0.5Mb` is 512 KiB and `1.5Mb` is 1536 KiB.
 
-Upload policy defaults are also configured in megabytes and can later be changed from
+```bash
-`/admin/settings`:
+cd backend
+go run ./cmd/warpbox
+```
+
+## Configuration
+
+All configuration comes from environment variables. The dev script sources `scripts/env/dev.env`.
+
+### Upload size
+
+Upload size limits are configured in megabytes through `WARPBOX_MAX_UPLOAD_SIZE_MB`. Fractions are
+supported, so `0.5Mb` is 512 KiB and `1.5Mb` is 1536 KiB.
+
+### Upload policy defaults
+
+These defaults can later be changed from `/admin/settings`:
 
 - `WARPBOX_ANONYMOUS_UPLOADS_ENABLED=true`
 - `WARPBOX_ANONYMOUS_MAX_UPLOAD_MB=512`
@@ -33,34 +61,184 @@ Upload policy defaults are also configured in megabytes and can later be changed
 - `WARPBOX_SHORT_WINDOW_SECONDS=60`
 - `WARPBOX_ANONYMOUS_STORAGE_BACKEND=local`
 - `WARPBOX_USER_STORAGE_BACKEND=local`
+- `WARPBOX_RESUMABLE_UPLOADS_ENABLED=true`
+- `WARPBOX_RESUMABLE_CHUNK_MB=8`
+- `WARPBOX_RESUMABLE_RETENTION_HOURS=24`
+- `WARPBOX_RESUMABLE_CHUNK_MODE=same`
+- `WARPBOX_RESUMABLE_CHUNK_PATH=`
+- `WARPBOX_TRUSTED_PROXIES=` controls whether forwarded client IP headers are accepted only from
+ specific proxy IPs/CIDRs. See [SECURITY_PROXY.md](./SECURITY_PROXY.md).
+
+Resumable settings are seeded from the environment and can then be edited from `/admin/settings`.
+Saved admin settings override these env defaults. `WARPBOX_RESUMABLE_CHUNK_MODE=same` stores draft
+chunks in the normal local temp path, `data/tmp/uploads/{session_id}` under `WARPBOX_DATA_DIR`.
+`WARPBOX_RESUMABLE_CHUNK_MODE=custom` uses `WARPBOX_RESUMABLE_CHUNK_PATH` instead, for example a
+mounted fast SSD path. Chunk storage is always local temporary staging; completed files are finalized
+into the selected storage backend after all chunks arrive.
+
+### Timeouts
+
+Large uploads are expected to take minutes on normal home/server connections. Keep
+`WARPBOX_READ_TIMEOUT=0s` and `WARPBOX_WRITE_TIMEOUT=0s` so Go does not close the connection
+mid upload; `WARPBOX_READ_HEADER_TIMEOUT=15s` still protects header reads from slowloris style
+connections.
+
+### Data directory
 
 Runtime data is configured with `WARPBOX_DATA_DIR` and defaults to `./data` in the dev environment.
 The dev script resolves that path from the repository root.
 
+### Background jobs
+
 Background jobs are enabled with `WARPBOX_JOBS_ENABLED=true`. Individual jobs can be toggled with
 `WARPBOX_CLEANUP_ENABLED` and `WARPBOX_THUMBNAIL_ENABLED`, and their schedules are configured with
 `WARPBOX_CLEANUP_EVERY` and `WARPBOX_THUMBNAIL_EVERY`.
 
+- **Cleanup**: expired boxes and boxes that have reached their download limit are cleaned on startup
+ and then on schedule. Stale resumable sessions are removed after `WARPBOX_RESUMABLE_RETENTION_HOURS`.
+- **Thumbnails**: missing image/video thumbnails are generated in a background worker.
+
+## First run bootstrap
+
 On a fresh data directory, visit `/register` to create the first account. That first user becomes
 the instance admin and normal registration closes after bootstrap. Admins can create copyable invite
 links from `/admin/users`.
 
-The env admin token still exists as emergency fallback access. Set `WARPBOX_ADMIN_TOKEN` and use it
+The env admin token exists as emergency fallback access. Set `WARPBOX_ADMIN_TOKEN` and use it at
-at `/admin/login` if you need to recover access without a user session.
+`/admin/login` if you need to recover access without a user session.
 
-For one-off Go commands, run them from the backend module:
+## Uploads
+
+Browser uploads use Warpbox native resumable uploads by default. Resumable behavior is configurable
+from `/admin/settings`, including enable/disable, chunk size, retention, and whether chunks use the
+default local temp path or a custom local path such as a fast SSD. When all chunks arrive, Warpbox
+returns the share link immediately and marks files as `Processing` until the background finalizer
+streams them into the selected storage backend. Draft chunks are deleted once finalization succeeds.
+Expired uploading drafts are cleaned after the configured retention window; sessions already in
+`Processing` are protected from cleanup while finalization is running.
+
+### Anonymous uploads
+
+Anonymous uploads return a private management link at creation time. Keep that link secret: anyone
+with it can delete the entire upload box. The raw delete token is not stored and cannot be recovered
+later. Browser uploads show `Open box` and `Copy URL` as the primary actions, with a smaller
+`Manage or delete this upload` link in the completion panel.
+
+### `curl` and ShareX
 
 ```bash
-cd backend
+# Terminal-friendly output: one plain box URL.
-go run ./cmd/warpbox
+curl -F file=@./report.pdf http://localhost:8080/api/v1/upload
+
+# JSON output with boxUrl, thumbnailUrl, manageUrl, deleteUrl, zipUrl, and file entries.
+curl -F sharex=@./screenshot.png \
+ -H 'Accept: application/json' \
+ http://localhost:8080/api/v1/upload
 ```
 
-## Docker / Podman
+The upload endpoint accepts multipart fields named `file` and `sharex`. ShareX users can start from
+`examples/sharex/warpbox-anonymous.sxcu`; update `RequestURL` to match your instance URL.
+Authenticated uploads (your account's limits) add an `Authorization: Bearer <token>` header mint a
+token under **Account → Access tokens**. The JSON response uses ShareX placeholders `{json:boxUrl}`
+(URL), `{json:thumbnailUrl}` (thumbnail), `{json:deleteUrl}` (deletion), and `{json:error}` (error
+message).
+
+### Grouping multiple files into one box (`X-Warpbox-Batch`)
+
+By default every uploaded file becomes its own box. To put several files in a **single** box, send
+the opt-in `X-Warpbox-Batch` header: requests that share the same header value (scoped per account,
+or per IP for anonymous uploads) within 20s are appended to the same box. This lets a multi-file
+ShareX selection which ShareX sends as separate back-to-back requests land as one shareable link.
+The shipped `.sxcu` sets `X-Warpbox-Batch: sharex`; remove that header for one box per file. Requests
+without the header behave exactly as before.
+
+### Resumable API flow
+
+Custom clients can use the resumable JSON API for large files:
+
+```bash
+# 1. Create a resumable session from file metadata.
+curl -s http://localhost:8080/api/v1/uploads/resumable \
+ -H 'Accept: application/json' \
+ -H 'Content-Type: application/json' \
+ -d '{"files":[{"name":"large.bin","size":1048576,"contentType":"application/octet-stream"}],"expiresMinutes":1440}'
+
+# 2. Upload exact-sized chunks using the returned sessionId, file id, and chunkSize.
+dd if=./large.bin bs=8388608 count=1 skip=0 2>/dev/null | \
+ curl -X PUT --data-binary @- \
+ http://localhost:8080/api/v1/uploads/resumable/SESSION_ID/files/FILE_ID/chunks/0
+
+# 3. Complete the session after all chunks are present.
+curl -X POST -H 'Accept: application/json' \
+ http://localhost:8080/api/v1/uploads/resumable/SESSION_ID/complete
+```
+
+The complete response is the same JSON shape as `POST /api/v1/upload`, including `boxUrl`,
+`manageUrl`, `deleteUrl`, and file URLs. Send `Authorization: Bearer <token>` on every resumable
+request to upload as an account.
+
+## Accounts and admin
+
+- `/register` bootstraps the first admin account only when no users exist.
+- `/login` and `/logout` provide cookie-based web sessions.
+- `/app` is the personal dashboard for logged-in users, showing owned boxes, storage usage, upload
+ history, and flat collections. Uploading still happens from the homepage.
+- `/admin` shows overview metrics: boxes, files, storage, recent uploads, protected/expired boxes.
+- `/admin/files` is a recent upload table with view and delete actions.
+- `/admin/users` lets admins create invite links, disable/reactivate users, generate reset links,
+ view storage/daily usage, and set per-user storage quota overrides.
+- `/admin/settings` controls anonymous uploads, anonymous max upload size, daily upload caps, default
+ user storage quota, and usage retention.
+- `/admin/storage` manages the built-in local file backend and S3-compatible bucket backends.
+- `/admin/bans` manages manual IP/CIDR bans and optional automatic bans for suspicious probes and
+ repeated login failures. Auto-ban is off by default and configured from the admin UI.
+
+Logged-in browser uploads from `/` use `POST /api/v1/upload`, and the resulting box is stored with
+owner and optional collection metadata. Admin users are exempt from the global max upload size on the
+homepage upload flow.
+
+Email delivery is intentionally deferred. Invite and reset links are copyable today; future SMTP
+support will power public forgot-password and optional email delivery.
+
+## Emoji reaction packs
+
+File reactions use emoji packs from the runtime data directory, not from the application code. By
+default that means `./data/emoji`; if you change `WARPBOX_DATA_DIR`, use `$WARPBOX_DATA_DIR/emoji`
+instead.
+
+Each folder under `./data/emoji` becomes one emoji tab in the reaction picker. Put image files
+directly inside the pack folder:
+
+```text
+data/
+├── db/
+├── files/
+├── logs/
+└── emoji/
+  ├── openmoji/
+  │  ├── 1F600.svg
+  │  ├── 1F44D.svg
+  │  └── 2764.svg
+  ├── pixel-pack/
+  │  ├── happy.webp
+  │  ├── fire.webp
+  │  └── star.webp
+  └── custom-work/
+    ├── approved.png
+    └── shipped.png
+```
+
+In this example, the picker shows tabs named `Openmoji`, `Pixel pack`, and `Custom work`. Supported
+emoji image extensions are `.svg`, `.webp`, `.png`, `.jpg`, `.jpeg`, and `.gif`.
+
+## Deployment
+
+### Docker / Podman
 
 Copy the example environment file and adjust values such as `WARPBOX_BASE_URL` and
-`WARPBOX_ADMIN_TOKEN` before running the container:
+`WARPBOX_ADMIN_TOKEN` before running the container. Copy the example
-
+[docker-compose.example.yml](./docker-compose.example.yml) to
-Copy the example [docker-compose.example.yml](./docker-compose.example.yml) to [docker-compose.yml](./docker-compose.yml), modify as need-be
+[docker-compose.yml](./docker-compose.yml), modify as need-be:
 
 ```bash
 cp .env.example .env
@@ -68,13 +246,97 @@ docker compose -f docker-compose.yml up --build
 ```
 
 The compose example also works with Podman compatible compose tools. Its data volume uses
-`./data:/data:Z` for SELinux relabeling, and the container overrides runtime paths to use
+`./data:/data:Z` for SELinux relabeling, and the container overrides runtime paths to use `/data`,
-`/data`, `/app/static`, and `/app/templates`.
+`/app/static`, and `/app/templates`. The image exposes the health endpoint `/health`, which Docker
+and compose healthchecks use.
 
-The image exposes `/health`, `/healthz`, and `/api/v1/health`. Docker and compose healthchecks
+### Reverse proxy security
-use `/health`.
 
-## Layout
+Warpbox uses the resolved client IP for anonymous limits, manual bans, and automatic bans. The
+default behavior trusts `X-Forwarded-For` and `X-Real-IP` so a normal Caddy reverse proxy works
+without extra setup. For hardened deployments where the app port might be reachable from more than one
+network, set `WARPBOX_TRUSTED_PROXIES` to trusted proxy IPs/CIDRs. See
+[SECURITY_PROXY.md](./SECURITY_PROXY.md) for Caddy examples and Docker/systemd notes.
+
+### Systemd
+
+Build the binary on the server, create a dedicated user, and keep runtime data outside the repo:
+
+```bash
+cd /opt/warpbox-dev/backend
+go build -o /usr/local/bin/warpbox ./cmd/warpbox
+sudo useradd --system --home /var/lib/warpbox --shell /usr/sbin/nologin warpbox
+sudo mkdir -p /var/lib/warpbox /etc/warpbox
+sudo chown -R warpbox:warpbox /var/lib/warpbox
+sudo cp /opt/warpbox-dev/.env.example /etc/warpbox/warpbox.env
+```
+
+Example `/etc/warpbox/warpbox.env` values:
+
+```env
+WARPBOX_ENV=production
+WARPBOX_ADDR=127.0.0.1:6070
+WARPBOX_BASE_URL=https://warpbox.dev
+WARPBOX_DATA_DIR=/var/lib/warpbox
+WARPBOX_STATIC_DIR=/opt/warpbox-dev/backend/static
+WARPBOX_TEMPLATE_DIR=/opt/warpbox-dev/backend/templates
+WARPBOX_TRUSTED_PROXIES=127.0.0.1,::1
+WARPBOX_READ_HEADER_TIMEOUT=15s
+WARPBOX_READ_TIMEOUT=0s
+WARPBOX_WRITE_TIMEOUT=0s
+```
+
+Example `/etc/systemd/system/warpbox.service`:
+
+```ini
+[Unit]
+Description=Warpbox file sharing service
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+User=warpbox
+Group=warpbox
+EnvironmentFile=/etc/warpbox/warpbox.env
+ExecStart=/usr/local/bin/warpbox
+Restart=always
+RestartSec=5
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ReadWritePaths=/var/lib/warpbox
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Then enable it:
+
+```bash
+sudo systemctl daemon-reload
+sudo systemctl enable --now warpbox
+sudo systemctl status warpbox
+```
+
+Put Caddy in front of `127.0.0.1:6070` and keep the Warpbox port closed to the public internet.
+
+## Runtime data
+
+Warpbox keeps local runtime data under the configured data directory:
+
+- `data/files/{box_id}/@each@{file_id}.ext` - uploaded file contents when the local backend is selected.
+- `data/files/{box_id}/@thumb@{file_id}.jpg` - generated previews when the local backend is selected.
+- `data/tmp/uploads/{session_id}` - temporary local chunks for unfinished resumable uploads when
+ the default chunk mode is selected.
+- `data/db/warpbox.bbolt` - bbolt metadata database for boxes, file records, users, sessions,
+ invites, collections, upload policy settings, daily usage records, manual bans, automatic ban
+ settings, abuse counters, and malicious path rules.
+- `data/logs/{YYYY-MM-DD}.log` - JSONL logs, one event per line.
+
+Uploaded file content, thumbnails, and private box metadata use the selected storage backend. The
+bbolt database and JSON logs always remain local under `./data/db` and `./data/logs`.
+
+## Project layout
 
 - `backend/cmd/warpbox` - main application entry point.
 - `backend/libs/config` - environment-backed configuration.
@@ -82,7 +344,7 @@ use `/health`.
 - `backend/libs/handlers` - HTTP handlers for pages, API, health, static files.
 - `backend/libs/jobs` - background job registration and job loop definitions.
 - `backend/libs/middleware` - request logging, recovery, security headers, gzip, request IDs.
-- `backend/libs/services` - business logic boundaries, starting with upload limits.
+- `backend/libs/services` - business logic boundaries.
 - `backend/libs/helpers` - small reusable helpers.
 - `backend/libs/web` - Go template renderer.
 - `backend/templates` - server-rendered Go templates.
@@ -91,75 +353,7 @@ use `/health`.
 - `scripts/env/dev.env.example` - tracked development environment template.
 - `scripts/env/dev.env` - local development environment, ignored by git.
 
-## Stage 2 Operator Tools
+## Static asset policy
 
-- `/admin/login` - token-based admin login.
+The static handler sets long-lived immutable caching for images, video, audio, and fonts, shorter
-- `/admin` - overview metrics: boxes, files, storage, recent uploads, protected/expired boxes.
+caching for CSS/JS, and gzip compression for compressible responses.
-- `/admin/files` - recent upload table with view and delete actions.
-- Expired boxes and boxes that have reached their download limit are cleaned on startup and then every `WARPBOX_CLEANUP_EVERY` when `WARPBOX_CLEANUP_ENABLED=true`.
-- Missing image/video thumbnails are generated in a background worker every `WARPBOX_THUMBNAIL_EVERY` when `WARPBOX_THUMBNAIL_ENABLED=true`.
-
-## Stage 3 Anonymous Integrations
-
-Anonymous uploads now return a private management link at creation time. Keep that link secret:
-anyone with it can delete the entire upload box. The raw delete token is not stored and cannot be
-recovered later.
-
-Browser uploads still show `Open box` and `Copy URL` as the primary actions, with a smaller
-`Manage or delete this upload` link in the completion panel.
-
-Curl and custom uploaders can use the same endpoint:
-
-```bash
-# Terminal-friendly output: one plain box URL.
-curl -F file=@./report.pdf http://localhost:8080/api/v1/upload
-
-# JSON output with boxUrl, manageUrl, deleteUrl, zipUrl, and file entries.
-curl -F sharex=@./screenshot.png \
-  -H 'Accept: application/json' \
-  http://localhost:8080/api/v1/upload
-```
-
-The upload endpoint accepts multipart fields named `file` and `sharex`. ShareX users can start
-from `examples/sharex/warpbox-anonymous.sxcu`; update `RequestURL` to match your instance URL.
-
-## Stage 4 Accounts + Personal Boxes
-
-- `/register` bootstraps the first admin account only when no users exist.
-- `/login` and `/logout` provide cookie-based web sessions.
-- `/app` is the personal dashboard for logged-in users, showing owned boxes, storage usage, upload
-  history, and flat collections. Uploading still happens from the homepage.
-- `/admin/users` lets admins create invite links, disable/reactivate users, and generate reset links.
-- Logged-in browser uploads from `/` still use `POST /api/v1/upload`, but the resulting box is
-  stored with owner and optional collection metadata.
-- Admin users are exempt from the global max upload size on the homepage upload flow. Future
-  per-user quotas should apply to this same upload path rather than creating a second uploader.
-- `/admin/settings` controls anonymous uploads, anonymous max upload size, daily upload caps, default
-  user storage quota, and usage retention.
-- `/admin/users` shows storage/daily usage and lets admins set per-user storage quota overrides.
-- `/admin/storage` manages the built-in local file backend and S3-compatible bucket backends.
-- Upload limits now include daily bytes, daily box counts, active box counts, short-window request
-  limits, max expiration days, local storage capacity in GB, and per-user policy overrides.
-- Uploaded file content, thumbnails, and private box metadata use the selected storage backend.
-  The bbolt database and JSON logs remain local under `./data/db` and `./data/logs`.
-- Anonymous uploads, ShareX uploads, unlisted public box links, password protection, expiry, delete
-  tokens, thumbnails, and cleanup continue to work as before.
-
-Email delivery is intentionally deferred. Invite and reset links are copyable today; future SMTP
-support will power public forgot-password and optional email delivery.
-
-## Runtime Data
-
-Warpbox keeps local runtime data under the configured data directory:
-
-- `data/files/{box_id}/@each@{file_id}.ext` - uploaded file contents when the local backend is selected.
-- `data/files/{box_id}/@thumb@{file_id}.jpg` - generated previews when the local backend is selected.
-- `data/db/warpbox.bbolt` - bbolt metadata database for boxes and file records.
-- `data/db/warpbox.bbolt` also stores users, sessions, invites, and collections.
-- `data/db/warpbox.bbolt` stores upload policy settings and daily usage records keyed by plain IP
-  for anonymous uploads and user ID for signed-in uploads.
-- `data/logs/{YYYY-MM-DD}.log` - JSONL logs, one event per line.
-
-## Static Asset Policy
-
-The static handler sets long-lived immutable caching for images, video, audio, and fonts, shorter caching for CSS/JS, and gzip compression for compressible responses.

SECURITY_PROXY.md

@@ -0,0 +1,87 @@
+# Security Proxy Notes
+
+Warpbox usually runs behind a reverse proxy such as Caddy. IP-based quotas,
+manual bans, and automatic bans depend on Warpbox seeing the real client IP.
+
+## Caddy
+
+Use this shape when Caddy and Warpbox are on the same host:
+
+```Caddyfile
+warpbox.dev {
+	reverse_proxy 127.0.0.1:6070 {
+		header_up X-Forwarded-For {http.request.remote.host}
+		header_up X-Real-IP {http.request.remote.host}
+	}
+}
+```
+
+By default, Warpbox trusts `X-Forwarded-For` and `X-Real-IP` so simple Docker,
+Podman, and systemd deployments work without extra setup. This is convenient,
+but it is only safe when the Warpbox port is not directly reachable by the
+public internet.
+
+## Trusted Proxies
+
+For stricter deployments, set `WARPBOX_TRUSTED_PROXIES` to the IPs or CIDR
+ranges that are allowed to provide forwarded headers. Use proxy IPs only.
+
+```env
+WARPBOX_TRUSTED_PROXIES=127.0.0.1,::1,172.30.0.1
+```
+
+When this value is set, Warpbox trusts `X-Forwarded-For` and `X-Real-IP` only
+if the TCP peer address is inside one of those trusted ranges. Requests coming
+directly from any other IP ignore forwarded headers and use the socket address.
+
+Recommended values:
+
+- Same-host Caddy with systemd: `127.0.0.1,::1`
+- Docker/Podman bridge gateway: add the exact gateway IP, for example `172.30.0.1`
+- Docker bridge networks: use a CIDR such as `172.16.0.0/12` only if the exact gateway changes often
+- Private reverse-proxy networks: add the exact private CIDR used by the proxy
+
+Warpbox prefers the first public address in `X-Forwarded-For` when a trusted
+proxy sends a chain. Loopback addresses and trusted proxy addresses are also
+protected from manual and automatic bans so a bad header setup cannot ban Caddy,
+the container gateway, or Warpbox itself.
+
+## Direct Exposure
+
+If you expose Warpbox directly without Caddy, either leave
+`WARPBOX_TRUSTED_PROXIES` empty and ensure clients cannot spoof headers at the
+network edge, or set it to a value that does not include public clients. Direct
+public exposure is not recommended; use a reverse proxy for TLS and request
+normalization.
+
+## Large Uploads
+
+Multi-GB uploads must not use whole-body read/write deadlines. Keep these
+Warpbox values for production unless you intentionally want a hard wall-clock
+upload limit:
+
+```env
+WARPBOX_READ_HEADER_TIMEOUT=15s
+WARPBOX_READ_TIMEOUT=0s
+WARPBOX_WRITE_TIMEOUT=0s
+```
+
+`WARPBOX_READ_HEADER_TIMEOUT` protects request headers. `WARPBOX_READ_TIMEOUT`
+and `WARPBOX_WRITE_TIMEOUT` cover the whole upload/response lifetime in Go, so
+small values can cause browser errors such as `NS_ERROR_NET_INTERRUPT` during
+large transfers. Upload size, daily, storage, and box limits still enforce abuse
+controls independently of these timeout values.
+
+## Ban Behavior
+
+Active bans return:
+
+```text
+HTTP/1.1 403 Forbidden
+Content-Type: text/plain; charset=utf-8
+
+forbidden
+```
+
+Blocked requests are still written to the JSON logs and appear under
+`/admin/logs` with `source=ban`.

backend/libs/config/config.go

@@ -11,25 +11,30 @@ import (
 )
 
 type Config struct {
-	AppName          string
+	AppName                 string
-	AppVersion       string
+	AppVersion              string
-	Environment      string
+	Environment             string
-	Addr             string
+	Addr                    string
-	BaseURL          string
+	BaseURL                 string
-	DataDir          string
+	DataDir                 string
-	AdminToken       string
+	AdminToken              string
-	StaticDir        string
+	StaticDir               string
-	TemplateDir      string
+	TemplateDir             string
-	ReadTimeout      time.Duration
+	ReadHeaderTimeout       time.Duration
-	WriteTimeout     time.Duration
+	ReadTimeout             time.Duration
-	IdleTimeout      time.Duration
+	WriteTimeout            time.Duration
-	JobsEnabled      bool
+	IdleTimeout             time.Duration
-	CleanupEnabled   bool
+	TrustedProxies          []string
-	CleanupEvery     time.Duration
+	JobsEnabled             bool
-	ThumbnailEnabled bool
+	CleanupEnabled          bool
-	ThumbnailEvery   time.Duration
+	CleanupEvery            time.Duration
-	MaxUploadSize    int64
+	ThumbnailEnabled        bool
-	DefaultSettings  SettingsDefaults
+	ThumbnailEvery          time.Duration
+	ResumableUploadsEnabled bool
+	ResumableChunkSize      int64
+	ResumableRetention      time.Duration
+	MaxUploadSize           int64
+	DefaultSettings         SettingsDefaults
 }
 
 type SettingsDefaults struct {
@@ -50,28 +55,38 @@ type SettingsDefaults struct {
 	ShortWindowSeconds      int
 	AnonymousStorageBackend string
 	UserStorageBackend      string
+	ResumableUploadsEnabled bool
+	ResumableChunkSizeMB    float64
+	ResumableRetentionHours int
+	ResumableChunkMode      string
+	ResumableChunkPath      string
 }
 
 func Load() (Config, error) {
 	cfg := Config{
-		AppName:          envString("WARPBOX_APP_NAME", "warpbox.dev"),
+		AppName:                 envString("WARPBOX_APP_NAME", "warpbox.dev"),
-		AppVersion:       envString("APP_VERSION", "dev"),
+		AppVersion:              envString("APP_VERSION", "dev"),
-		Environment:      envString("WARPBOX_ENV", "development"),
+		Environment:             envString("WARPBOX_ENV", "development"),
-		Addr:             envString("WARPBOX_ADDR", ":8080"),
+		Addr:                    envString("WARPBOX_ADDR", ":8080"),
-		BaseURL:          strings.TrimRight(envString("WARPBOX_BASE_URL", "http://localhost:8080"), "/"),
+		BaseURL:                 strings.TrimRight(envString("WARPBOX_BASE_URL", "http://localhost:8080"), "/"),
-		DataDir:          envString("WARPBOX_DATA_DIR", defaultPath("data")),
+		DataDir:                 envString("WARPBOX_DATA_DIR", defaultPath("data")),
-		AdminToken:       envString("WARPBOX_ADMIN_TOKEN", ""),
+		AdminToken:              envString("WARPBOX_ADMIN_TOKEN", ""),
-		StaticDir:        envString("WARPBOX_STATIC_DIR", defaultPath("static")),
+		StaticDir:               envString("WARPBOX_STATIC_DIR", defaultPath("static")),
-		TemplateDir:      envString("WARPBOX_TEMPLATE_DIR", defaultPath("templates")),
+		TemplateDir:             envString("WARPBOX_TEMPLATE_DIR", defaultPath("templates")),
-		ReadTimeout:      envDuration("WARPBOX_READ_TIMEOUT", 15*time.Second),
+		ReadHeaderTimeout:       envDuration("WARPBOX_READ_HEADER_TIMEOUT", 15*time.Second),
-		WriteTimeout:     envDuration("WARPBOX_WRITE_TIMEOUT", 60*time.Second),
+		ReadTimeout:             envDuration("WARPBOX_READ_TIMEOUT", 0),
-		IdleTimeout:      envDuration("WARPBOX_IDLE_TIMEOUT", 120*time.Second),
+		WriteTimeout:            envDuration("WARPBOX_WRITE_TIMEOUT", 0),
-		JobsEnabled:      envBool("WARPBOX_JOBS_ENABLED", true),
+		IdleTimeout:             envDuration("WARPBOX_IDLE_TIMEOUT", 120*time.Second),
-		CleanupEnabled:   envBool("WARPBOX_CLEANUP_ENABLED", true),
+		TrustedProxies:          envCSV("WARPBOX_TRUSTED_PROXIES"),
-		CleanupEvery:     envDuration("WARPBOX_CLEANUP_EVERY", time.Hour),
+		JobsEnabled:             envBool("WARPBOX_JOBS_ENABLED", true),
-		ThumbnailEnabled: envBool("WARPBOX_THUMBNAIL_ENABLED", true),
+		CleanupEnabled:          envBool("WARPBOX_CLEANUP_ENABLED", true),
-		ThumbnailEvery:   envDuration("WARPBOX_THUMBNAIL_EVERY", time.Minute),
+		CleanupEvery:            envDuration("WARPBOX_CLEANUP_EVERY", time.Hour),
-		MaxUploadSize:    envMegabytes("WARPBOX_MAX_UPLOAD_SIZE_MB", 2048), // 2 GiB default.
+		ThumbnailEnabled:        envBool("WARPBOX_THUMBNAIL_ENABLED", true),
+		ThumbnailEvery:          envDuration("WARPBOX_THUMBNAIL_EVERY", time.Minute),
+		ResumableUploadsEnabled: envBool("WARPBOX_RESUMABLE_UPLOADS_ENABLED", true),
+		ResumableChunkSize:      envMegabytes("WARPBOX_RESUMABLE_CHUNK_MB", 8),
+		ResumableRetention:      time.Duration(envInt("WARPBOX_RESUMABLE_RETENTION_HOURS", 24)) * time.Hour,
+		MaxUploadSize:           envMegabytes("WARPBOX_MAX_UPLOAD_SIZE_MB", 2048), // 2 GiB default.
 		DefaultSettings: SettingsDefaults{
 			AnonymousUploadsEnabled: envBool("WARPBOX_ANONYMOUS_UPLOADS_ENABLED", true),
 			AnonymousMaxUploadMB:    envMegabytesLimitFloat("WARPBOX_ANONYMOUS_MAX_UPLOAD_MB", 512),
@@ -90,8 +105,13 @@ func Load() (Config, error) {
 			ShortWindowSeconds:      envInt("WARPBOX_SHORT_WINDOW_SECONDS", 60),
 			AnonymousStorageBackend: envString("WARPBOX_ANONYMOUS_STORAGE_BACKEND", "local"),
 			UserStorageBackend:      envString("WARPBOX_USER_STORAGE_BACKEND", "local"),
+			ResumableChunkMode:      envString("WARPBOX_RESUMABLE_CHUNK_MODE", "same"),
+			ResumableChunkPath:      envString("WARPBOX_RESUMABLE_CHUNK_PATH", ""),
 		},
 	}
+	cfg.DefaultSettings.ResumableUploadsEnabled = cfg.ResumableUploadsEnabled
+	cfg.DefaultSettings.ResumableChunkSizeMB = float64(cfg.ResumableChunkSize) / 1024 / 1024
+	cfg.DefaultSettings.ResumableRetentionHours = int(cfg.ResumableRetention / time.Hour)
 
 	if cfg.BaseURL == "" {
 		return Config{}, fmt.Errorf("WARPBOX_BASE_URL cannot be empty")
@@ -99,6 +119,12 @@ func Load() (Config, error) {
 	if cfg.MaxUploadSize <= 0 {
 		return Config{}, fmt.Errorf("WARPBOX_MAX_UPLOAD_SIZE_MB must be positive")
 	}
+	if cfg.ResumableChunkSize <= 0 {
+		return Config{}, fmt.Errorf("WARPBOX_RESUMABLE_CHUNK_MB must be positive")
+	}
+	if cfg.ResumableRetention <= 0 {
+		return Config{}, fmt.Errorf("WARPBOX_RESUMABLE_RETENTION_HOURS must be positive")
+	}
 	if !validUnlimitedMegabyteLimit(cfg.DefaultSettings.AnonymousMaxUploadMB) ||
 		!validUnlimitedMegabyteLimit(cfg.DefaultSettings.AnonymousDailyUploadMB) ||
 		!validUnlimitedMegabyteLimit(cfg.DefaultSettings.UserDailyUploadMB) ||
@@ -180,6 +206,21 @@ func envInt(key string, fallback int) int {
 	return parsed
 }
 
+func envCSV(key string) []string {
+	value := strings.TrimSpace(os.Getenv(key))
+	if value == "" {
+		return nil
+	}
+	parts := strings.Split(value, ",")
+	values := make([]string, 0, len(parts))
+	for _, part := range parts {
+		if trimmed := strings.TrimSpace(part); trimmed != "" {
+			values = append(values, trimmed)
+		}
+	}
+	return values
+}
+
 func envMegabytes(key string, fallback float64) int64 {
 	value := strings.TrimSpace(os.Getenv(key))
 	if value == "" {

backend/libs/config/config_test.go

@@ -1,6 +1,9 @@
 package config
 
-import "testing"
+import (
+	"testing"
+	"time"
+)
 
 func TestParseMegabytes(t *testing.T) {
 	tests := map[string]int64{
@@ -49,3 +52,29 @@ func TestEnvBool(t *testing.T) {
 		t.Fatalf("envBool() did not fall back to true")
 	}
 }
+
+func TestLoadDefaultsUseLargeUploadFriendlyTimeouts(t *testing.T) {
+	t.Setenv("WARPBOX_BASE_URL", "http://example.test")
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("Load returned error: %v", err)
+	}
+	if cfg.ReadHeaderTimeout != 15*time.Second {
+		t.Fatalf("ReadHeaderTimeout = %s, want 15s", cfg.ReadHeaderTimeout)
+	}
+	if cfg.ReadTimeout != 0 {
+		t.Fatalf("ReadTimeout = %s, want 0 for long uploads", cfg.ReadTimeout)
+	}
+	if cfg.WriteTimeout != 0 {
+		t.Fatalf("WriteTimeout = %s, want 0 for long uploads", cfg.WriteTimeout)
+	}
+	if !cfg.ResumableUploadsEnabled {
+		t.Fatalf("ResumableUploadsEnabled = false, want true")
+	}
+	if cfg.ResumableChunkSize != 8*1024*1024 {
+		t.Fatalf("ResumableChunkSize = %d, want 8 MiB", cfg.ResumableChunkSize)
+	}
+	if cfg.ResumableRetention != 24*time.Hour {
+		t.Fatalf("ResumableRetention = %s, want 24h", cfg.ResumableRetention)
+	}
+}

backend/libs/handlers/accounts_test.go

@@ -3,10 +3,14 @@ package handlers
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"net/http"
 	"net/http/httptest"
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"
+	"time"
 
 	"warpbox.dev/backend/libs/services"
 )
@@ -411,6 +415,80 @@ func TestLayeredUploadLimits(t *testing.T) {
 	}
 }
 
+func TestBatchedUploadAppendBypassesDailyBoxCreationCap(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	policy := testPolicy(t, app)
+	policy.AnonymousDailyBoxes = 1
+	policy.AnonymousActiveBoxes = 10
+	if err := app.settingsService.UpdateUploadPolicy(policy); err != nil {
+		t.Fatalf("UpdateUploadPolicy returned error: %v", err)
+	}
+
+	first := multipartUploadRequest(t, "/api/v1/upload", "file", "first.txt", "hello")
+	first.Header.Set("Accept", "application/json")
+	first.Header.Set(uploadBatchHeader, "sharex-test")
+	firstResponse := httptest.NewRecorder()
+	app.Upload(firstResponse, first)
+	if firstResponse.Code != http.StatusCreated {
+		t.Fatalf("first batched status = %d, body = %s", firstResponse.Code, firstResponse.Body.String())
+	}
+
+	second := multipartUploadRequest(t, "/api/v1/upload", "file", "second.txt", "hello")
+	second.Header.Set("Accept", "application/json")
+	second.Header.Set(uploadBatchHeader, "sharex-test")
+	secondResponse := httptest.NewRecorder()
+	app.Upload(secondResponse, second)
+	if secondResponse.Code != http.StatusCreated {
+		t.Fatalf("second batched status = %d, body = %s", secondResponse.Code, secondResponse.Body.String())
+	}
+
+	third := multipartUploadRequest(t, "/api/v1/upload", "file", "third.txt", "hello")
+	third.Header.Set("Accept", "application/json")
+	thirdResponse := httptest.NewRecorder()
+	app.Upload(thirdResponse, third)
+	if thirdResponse.Code != http.StatusTooManyRequests {
+		t.Fatalf("non-batched status = %d, body = %s", thirdResponse.Code, thirdResponse.Body.String())
+	}
+}
+
+func TestBatchedUploadAppendBypassesActiveBoxCreationCap(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	policy := testPolicy(t, app)
+	policy.AnonymousDailyBoxes = 10
+	policy.AnonymousActiveBoxes = 1
+	if err := app.settingsService.UpdateUploadPolicy(policy); err != nil {
+		t.Fatalf("UpdateUploadPolicy returned error: %v", err)
+	}
+
+	first := multipartUploadRequest(t, "/api/v1/upload", "file", "first.txt", "hello")
+	first.Header.Set("Accept", "application/json")
+	first.Header.Set(uploadBatchHeader, "active-cap")
+	firstResponse := httptest.NewRecorder()
+	app.Upload(firstResponse, first)
+	if firstResponse.Code != http.StatusCreated {
+		t.Fatalf("first batched status = %d, body = %s", firstResponse.Code, firstResponse.Body.String())
+	}
+
+	second := multipartUploadRequest(t, "/api/v1/upload", "file", "second.txt", "hello")
+	second.Header.Set("Accept", "application/json")
+	second.Header.Set(uploadBatchHeader, "active-cap")
+	secondResponse := httptest.NewRecorder()
+	app.Upload(secondResponse, second)
+	if secondResponse.Code != http.StatusCreated {
+		t.Fatalf("second batched status = %d, body = %s", secondResponse.Code, secondResponse.Body.String())
+	}
+
+	third := multipartUploadRequest(t, "/api/v1/upload", "file", "third.txt", "hello")
+	third.Header.Set("Accept", "application/json")
+	thirdResponse := httptest.NewRecorder()
+	app.Upload(thirdResponse, third)
+	if thirdResponse.Code != http.StatusTooManyRequests {
+		t.Fatalf("non-batched status = %d, body = %s", thirdResponse.Code, thirdResponse.Body.String())
+	}
+}
+
 func TestUserPolicyOverrideChangesUploadEnforcement(t *testing.T) {
 	app, cleanup := newTestApp(t)
 	defer cleanup()
@@ -617,6 +695,108 @@ func TestAPIDocsHeaderReflectsLoggedOutUser(t *testing.T) {
 	}
 }
 
+func TestAdminOverviewChartsUseZeroAndFullHeights(t *testing.T) {
+	now := time.Now().UTC()
+	today := time.Date(now.Year(), now.Month(), now.Day(), 12, 0, 0, 0, time.UTC)
+	overview := buildAdminOverview([]services.AdminBox{{
+		ID:        "box1",
+		CreatedAt: today,
+		TotalSize: 1024,
+	}}, services.AdminStats{TotalBoxes: 1, TotalFiles: 1, TotalSize: 1024})
+
+	for i, bar := range overview.UploadDays {
+		want := 0
+		if i == len(overview.UploadDays)-1 {
+			want = 150
+		}
+		if bar.HeightPx != want {
+			t.Fatalf("upload bar %d height = %d, want %d", i, bar.HeightPx, want)
+		}
+	}
+	for i, bar := range overview.StorageDays {
+		want := 0
+		if i == len(overview.StorageDays)-1 {
+			want = 150
+		}
+		if bar.HeightPx != want {
+			t.Fatalf("storage bar %d height = %d, want %d", i, bar.HeightPx, want)
+		}
+	}
+	if overview.StatusBars[0].WidthPercent != 100 {
+		t.Fatalf("active status width = %d, want 100", overview.StatusBars[0].WidthPercent)
+	}
+}
+
+func TestAdminOverviewChartsScaleRelativeToVisibleRange(t *testing.T) {
+	now := time.Now().UTC()
+	today := time.Date(now.Year(), now.Month(), now.Day(), 12, 0, 0, 0, time.UTC)
+	yesterday := today.AddDate(0, 0, -1)
+	twoDaysAgo := today.AddDate(0, 0, -2)
+	boxes := []services.AdminBox{
+		{ID: "today-1", CreatedAt: today, TotalSize: 30},
+		{ID: "today-2", CreatedAt: today, TotalSize: 30},
+		{ID: "today-3", CreatedAt: today, TotalSize: 30},
+		{ID: "yesterday-1", CreatedAt: yesterday, TotalSize: 20},
+		{ID: "yesterday-2", CreatedAt: yesterday, TotalSize: 20},
+		{ID: "two-days-ago", CreatedAt: twoDaysAgo, TotalSize: 10},
+	}
+	overview := buildAdminOverview(boxes, services.AdminStats{TotalBoxes: 6, ExpiredBoxes: 2, ProtectedBoxes: 1})
+
+	last := len(overview.UploadDays) - 1
+	if overview.UploadDays[last].HeightPx != 150 {
+		t.Fatalf("3-upload day height = %d, want 150", overview.UploadDays[last].HeightPx)
+	}
+	if overview.UploadDays[last-1].HeightPx != 100 {
+		t.Fatalf("2-upload day height = %d, want 100", overview.UploadDays[last-1].HeightPx)
+	}
+	if overview.UploadDays[last-2].HeightPx != 50 {
+		t.Fatalf("1-upload day height = %d, want 50", overview.UploadDays[last-2].HeightPx)
+	}
+	if overview.StorageDays[last].HeightPx != 150 || overview.StorageDays[last-1].HeightPx != 66 || overview.StorageDays[last-2].HeightPx != 16 {
+		t.Fatalf("storage heights = %d/%d/%d, want 150/66/16", overview.StorageDays[last].HeightPx, overview.StorageDays[last-1].HeightPx, overview.StorageDays[last-2].HeightPx)
+	}
+	if overview.StatusBars[0].WidthPercent != 100 || overview.StatusBars[1].WidthPercent != 50 || overview.StatusBars[2].WidthPercent != 25 {
+		t.Fatalf("status widths = %d/%d/%d, want 100/50/25", overview.StatusBars[0].WidthPercent, overview.StatusBars[1].WidthPercent, overview.StatusBars[2].WidthPercent)
+	}
+}
+
+func TestAdminOverviewRendersInlineBarDimensions(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	adminToken := createAdminSession(t, app)
+	uploadThroughApp(t, app)
+
+	request := httptest.NewRequest(http.MethodGet, "/admin", nil)
+	request.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	response := httptest.NewRecorder()
+	app.AdminDashboard(response, request)
+	if response.Code != http.StatusOK {
+		t.Fatalf("AdminDashboard status = %d, body = %s", response.Code, response.Body.String())
+	}
+	body := response.Body.String()
+	if !strings.Contains(body, `style="height: 150px"`) {
+		t.Fatalf("admin overview did not render a full-height pixel bar: %s", body)
+	}
+	if !strings.Contains(body, `data-height-px="150"`) || !strings.Contains(body, `data-chart-value=`) {
+		t.Fatalf("admin overview did not render chart fallback data attributes: %s", body)
+	}
+	if !strings.Contains(body, `style="height: 0px"`) {
+		t.Fatalf("admin overview did not render zero pixel bars: %s", body)
+	}
+	if !strings.Contains(body, `style="width: 100%"`) {
+		t.Fatalf("admin overview did not render a full-width status bar: %s", body)
+	}
+	if !strings.Contains(body, `data-width-percent="100"`) || !strings.Contains(body, `data-stat-value=`) {
+		t.Fatalf("admin overview did not render status fallback data attributes: %s", body)
+	}
+	if strings.Contains(body, "--bar-height") {
+		t.Fatalf("admin overview still uses css variable bar heights: %s", body)
+	}
+	if !strings.Contains(body, "/static/js/25-admin-charts.js?version=test") {
+		t.Fatalf("admin overview did not load chart fallback script: %s", body)
+	}
+}
+
 func TestAdminStorageProviderPagesOnlyRenderRelevantFields(t *testing.T) {
 	app, cleanup := newTestApp(t)
 	defer cleanup()
@@ -728,6 +908,101 @@ func TestAdminStorageJobRoutesRequireAdminAndCSRF(t *testing.T) {
 	}
 }
 
+func TestAdminStorageDeleteAction(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	adminToken := createAdminSession(t, app)
+	cfg, err := app.uploadService.Storage().CreateBackend(services.StorageBackendConfig{
+		Provider:   services.StorageProviderWebDAV,
+		Name:       "DAV",
+		Endpoint:   "https://dav.example.test",
+		Username:   "warpbox",
+		Password:   "secret",
+		RemotePath: "/warpbox",
+	})
+	if err != nil {
+		t.Fatalf("CreateBackend returned error: %v", err)
+	}
+
+	deleteRequest := httptest.NewRequest(http.MethodPost, "/admin/storage/"+cfg.ID+"/delete", strings.NewReader("csrf_token=test-csrf"))
+	deleteRequest.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	deleteRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	deleteRequest.AddCookie(&http.Cookie{Name: csrfCookieName, Value: "test-csrf"})
+	deleteRequest.SetPathValue("backendID", cfg.ID)
+	deleteResponse := httptest.NewRecorder()
+	app.AdminDeleteStorage(deleteResponse, deleteRequest)
+	if deleteResponse.Code != http.StatusSeeOther {
+		t.Fatalf("AdminDeleteStorage status = %d, body = %s", deleteResponse.Code, deleteResponse.Body.String())
+	}
+	if _, err := app.uploadService.Storage().BackendConfig(cfg.ID); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("BackendConfig after delete = %v, want not exist", err)
+	}
+}
+
+func TestAdminStorageDeleteResetsDefaultsAndUserOverrides(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	adminToken := createAdminSession(t, app)
+	user, err := app.authService.UserByEmail("admin@example.test")
+	if err != nil {
+		t.Fatalf("UserByEmail returned error: %v", err)
+	}
+	cfg, err := app.uploadService.Storage().CreateBackend(services.StorageBackendConfig{
+		Provider:   services.StorageProviderWebDAV,
+		Name:       "DAV",
+		Endpoint:   "https://dav.example.test",
+		Username:   "warpbox",
+		Password:   "secret",
+		RemotePath: "/warpbox",
+	})
+	if err != nil {
+		t.Fatalf("CreateBackend returned error: %v", err)
+	}
+	settings, err := app.settingsService.UploadPolicy()
+	if err != nil {
+		t.Fatalf("UploadPolicy returned error: %v", err)
+	}
+	settings.UserStorageBackend = cfg.ID
+	if err := app.settingsService.UpdateUploadPolicy(settings); err != nil {
+		t.Fatalf("UpdateUploadPolicy returned error: %v", err)
+	}
+	if err := app.authService.SetUserStorageBackend(user.ID, cfg.ID); err != nil {
+		t.Fatalf("SetUserStorageBackend returned error: %v", err)
+	}
+
+	request := httptest.NewRequest(http.MethodPost, "/admin/storage/"+cfg.ID+"/delete", strings.NewReader("csrf_token=test-csrf"))
+	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	request.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	request.AddCookie(&http.Cookie{Name: csrfCookieName, Value: "test-csrf"})
+	request.SetPathValue("backendID", cfg.ID)
+	response := httptest.NewRecorder()
+	app.AdminDeleteStorage(response, request)
+	if response.Code != http.StatusSeeOther {
+		t.Fatalf("AdminDeleteStorage status = %d, body = %s", response.Code, response.Body.String())
+	}
+	location := response.Header().Get("Location")
+	if !strings.Contains(location, "Storage+backend+deleted") || !strings.Contains(location, "cleared+1+user+overrides") {
+		t.Fatalf("delete redirect did not include cascade notice: %s", location)
+	}
+	if _, err := app.uploadService.Storage().BackendConfig(cfg.ID); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("BackendConfig after delete = %v, want not exist", err)
+	}
+	nextSettings, err := app.settingsService.UploadPolicy()
+	if err != nil {
+		t.Fatalf("UploadPolicy returned error: %v", err)
+	}
+	if nextSettings.UserStorageBackend != services.StorageBackendLocal {
+		t.Fatalf("UserStorageBackend = %q, want local", nextSettings.UserStorageBackend)
+	}
+	nextUser, err := app.authService.UserByID(user.ID)
+	if err != nil {
+		t.Fatalf("UserByID returned error: %v", err)
+	}
+	if nextUser.Policy.StorageBackendID != nil {
+		t.Fatalf("user storage override was not cleared: %+v", nextUser.Policy)
+	}
+}
+
 func TestAdminStorageSpeedTestStartsBackgroundJob(t *testing.T) {
 	app, cleanup := newTestApp(t)
 	defer cleanup()
@@ -801,6 +1076,200 @@ func TestAdminStorageTestingPageRendersHistory(t *testing.T) {
 	}
 }
 
+func TestAdminLogsAndBansPagesRender(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	adminToken := createAdminSession(t, app)
+	logDir := filepath.Join(app.cfg.DataDir, "logs")
+	if err := os.MkdirAll(logDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll returned error: %v", err)
+	}
+	logPath := filepath.Join(logDir, "2026-05-31.log")
+	lines := strings.Join([]string{
+		`{"date":"2026-05-31","time":"12:34:56","source":"user-upload","severity":"user_activity","code":2001,"log":"upload response sent","ip":"127.0.0.1","box_id":"box123"}`,
+		`{"date":"2026-05-31","time":"12:35:56","source":"http","severity":"dev","code":200,"log":"http request","remote_addr":"172.30.0.1:48358","box_id":"box456"}`,
+		`{"date":"2026-05-31","time":"12:36:56","source":"http","severity":"dev","code":200,"log":"http request","method":"GET","path":"/health","ip":"127.0.0.1","user_agent":"Wget"}`,
+		"",
+	}, "\n")
+	if err := os.WriteFile(logPath, []byte(lines), 0o644); err != nil {
+		t.Fatalf("WriteFile returned error: %v", err)
+	}
+
+	logsRequest := httptest.NewRequest(http.MethodGet, "/admin/logs?q=box123", nil)
+	logsRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	logsResponse := httptest.NewRecorder()
+	app.AdminLogs(logsResponse, logsRequest)
+	if logsResponse.Code != http.StatusOK {
+		t.Fatalf("AdminLogs status = %d, body = %s", logsResponse.Code, logsResponse.Body.String())
+	}
+	logsBody := logsResponse.Body.String()
+	if !strings.Contains(logsBody, "upload response sent") || !strings.Contains(logsBody, "box123") {
+		t.Fatalf("AdminLogs missing expected log entry: %s", logsBody)
+	}
+	if strings.Contains(logsBody, "172.30.0.1:48358") {
+		t.Fatalf("AdminLogs rendered remote address with port: %s", logsBody)
+	}
+	healthRequest := httptest.NewRequest(http.MethodGet, "/admin/logs", nil)
+	healthRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	healthResponse := httptest.NewRecorder()
+	app.AdminLogs(healthResponse, healthRequest)
+	if healthResponse.Code != http.StatusOK {
+		t.Fatalf("AdminLogs health status = %d, body = %s", healthResponse.Code, healthResponse.Body.String())
+	}
+	if strings.Contains(healthResponse.Body.String(), "/health") || strings.Contains(healthResponse.Body.String(), "Wget") {
+		t.Fatalf("AdminLogs rendered container health ping: %s", healthResponse.Body.String())
+	}
+
+	bansRequest := httptest.NewRequest(http.MethodGet, "/admin/bans", nil)
+	bansRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	bansResponse := httptest.NewRecorder()
+	app.AdminBans(bansResponse, bansRequest)
+	if bansResponse.Code != http.StatusOK {
+		t.Fatalf("AdminBans status = %d, body = %s", bansResponse.Code, bansResponse.Body.String())
+	}
+	if !strings.Contains(bansResponse.Body.String(), "Manual ban") || !strings.Contains(bansResponse.Body.String(), "Auto-ban settings") {
+		t.Fatalf("AdminBans missing ban controls: %s", bansResponse.Body.String())
+	}
+}
+
+func TestAdminCanCreateAndUnbanIPBan(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	adminToken := createAdminSession(t, app)
+	expiresAt := time.Now().Add(24 * time.Hour).Format("2006-01-02T15:04")
+	request := httptest.NewRequest(http.MethodPost, "/admin/bans", strings.NewReader("target=203.0.113.90&reason=test&expires_at="+expiresAt+"&csrf_token=test-csrf"))
+	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	request.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	request.AddCookie(&http.Cookie{Name: csrfCookieName, Value: "test-csrf"})
+	response := httptest.NewRecorder()
+	app.AdminCreateBan(response, request)
+	if response.Code != http.StatusSeeOther {
+		t.Fatalf("AdminCreateBan status = %d, body = %s", response.Code, response.Body.String())
+	}
+	records, err := app.banService.ListBans()
+	if err != nil {
+		t.Fatalf("ListBans returned error: %v", err)
+	}
+	if len(records) != 1 || records[0].Normalized != "203.0.113.90" {
+		t.Fatalf("records = %+v", records)
+	}
+
+	unbanRequest := httptest.NewRequest(http.MethodPost, "/admin/bans/"+records[0].ID+"/unban", strings.NewReader("csrf_token=test-csrf"))
+	unbanRequest.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	unbanRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	unbanRequest.AddCookie(&http.Cookie{Name: csrfCookieName, Value: "test-csrf"})
+	unbanRequest.SetPathValue("banID", records[0].ID)
+	unbanResponse := httptest.NewRecorder()
+	app.AdminUnban(unbanResponse, unbanRequest)
+	if unbanResponse.Code != http.StatusSeeOther {
+		t.Fatalf("AdminUnban status = %d, body = %s", unbanResponse.Code, unbanResponse.Body.String())
+	}
+	if _, ok, err := app.banService.Match("203.0.113.90", time.Now().UTC()); err != nil || ok {
+		t.Fatalf("unbanned Match = %v, %v", ok, err)
+	}
+}
+
+func TestAdminCanUpdateBanSettingsAndRules(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	adminToken := createAdminSession(t, app)
+	settingsRequest := httptest.NewRequest(http.MethodPost, "/admin/bans/settings", strings.NewReader("auto_ban_enabled=on&auto_ban_duration_hours=48&abuse_window_hours=12&malicious_path_threshold=2&admin_login_failure_threshold=4&user_login_failure_threshold=5&csrf_token=test-csrf"))
+	settingsRequest.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	settingsRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	settingsRequest.AddCookie(&http.Cookie{Name: csrfCookieName, Value: "test-csrf"})
+	settingsResponse := httptest.NewRecorder()
+	app.AdminBanSettingsPost(settingsResponse, settingsRequest)
+	if settingsResponse.Code != http.StatusSeeOther {
+		t.Fatalf("AdminBanSettingsPost status = %d, body = %s", settingsResponse.Code, settingsResponse.Body.String())
+	}
+	settings, err := app.banService.Settings()
+	if err != nil {
+		t.Fatalf("Settings returned error: %v", err)
+	}
+	if !settings.AutoBanEnabled || settings.AutoBanDurationHours != 48 || settings.MaliciousPathThreshold != 2 {
+		t.Fatalf("settings = %+v", settings)
+	}
+
+	rulesRequest := httptest.NewRequest(http.MethodPost, "/admin/bans/rules", strings.NewReader("patterns=%2Fcustom-one%0A%2Fcustom-two&csrf_token=test-csrf"))
+	rulesRequest.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	rulesRequest.AddCookie(&http.Cookie{Name: userSessionCookieName, Value: adminToken})
+	rulesRequest.AddCookie(&http.Cookie{Name: csrfCookieName, Value: "test-csrf"})
+	rulesResponse := httptest.NewRecorder()
+	app.AdminBanRulesPost(rulesResponse, rulesRequest)
+	if rulesResponse.Code != http.StatusSeeOther {
+		t.Fatalf("AdminBanRulesPost status = %d, body = %s", rulesResponse.Code, rulesResponse.Body.String())
+	}
+	if pattern, err := app.banService.MaliciousPattern("/x/custom-two"); err != nil || pattern != "/custom-two" {
+		t.Fatalf("MaliciousPattern = %q, %v", pattern, err)
+	}
+}
+
+func TestLoginFailuresCreateAutoBanWhenEnabled(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	_, err := app.authService.CreateBootstrapUser("admin", "admin@example.test", "password123")
+	if err != nil {
+		t.Fatalf("CreateBootstrapUser returned error: %v", err)
+	}
+	settings, err := app.banService.Settings()
+	if err != nil {
+		t.Fatalf("Settings returned error: %v", err)
+	}
+	settings.AutoBanEnabled = true
+	settings.UserLoginFailureThreshold = 2
+	if err := app.banService.UpdateSettings(settings); err != nil {
+		t.Fatalf("UpdateSettings returned error: %v", err)
+	}
+
+	for i := 0; i < 2; i++ {
+		request := httptest.NewRequest(http.MethodPost, "/login", strings.NewReader("email=admin@example.test&password=wrong"))
+		request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+		request.RemoteAddr = "203.0.113.91:1234"
+		response := httptest.NewRecorder()
+		app.LoginPost(response, request)
+		if response.Code != http.StatusUnauthorized {
+			t.Fatalf("LoginPost status = %d", response.Code)
+		}
+	}
+	if _, ok, err := app.banService.Match("203.0.113.91", time.Now().UTC()); err != nil || !ok {
+		t.Fatalf("Match after login failures = %v, %v", ok, err)
+	}
+}
+
+func TestAdminLoginFailuresCreateAutoBanWhenEnabled(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	settings, err := app.banService.Settings()
+	if err != nil {
+		t.Fatalf("Settings returned error: %v", err)
+	}
+	settings.AutoBanEnabled = true
+	settings.AdminLoginFailureThreshold = 2
+	if err := app.banService.UpdateSettings(settings); err != nil {
+		t.Fatalf("UpdateSettings returned error: %v", err)
+	}
+	app.cfg.AdminToken = "correct-token"
+
+	for i := 0; i < 2; i++ {
+		request := httptest.NewRequest(http.MethodPost, "/admin/login", strings.NewReader("token=wrong"))
+		request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+		request.RemoteAddr = "203.0.113.92:1234"
+		response := httptest.NewRecorder()
+		app.AdminLoginPost(response, request)
+		if response.Code != http.StatusUnauthorized {
+			t.Fatalf("AdminLoginPost status = %d", response.Code)
+		}
+	}
+	if _, ok, err := app.banService.Match("203.0.113.92", time.Now().UTC()); err != nil || !ok {
+		t.Fatalf("Match after admin login failures = %v, %v", ok, err)
+	}
+}
+
 func createOwnedBoxThroughApp(t *testing.T, app *App, userID string) services.UploadResult {
 	t.Helper()
 	user, err := app.authService.UserByID(userID)

backend/libs/handlers/admin_files.go

@@ -0,0 +1,492 @@
+package handlers
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"warpbox.dev/backend/libs/helpers"
+	"warpbox.dev/backend/libs/services"
+	"warpbox.dev/backend/libs/web"
+)
+
+const adminFilesDefaultPageSize = 50
+
+var adminFilesPageSizes = []int{25, 50, 100, 200}
+
+type adminFilesData struct {
+	Stats          services.AdminStats
+	Section        string
+	PageTitle      string
+	Boxes          []adminBoxView
+	Query          string
+	Sort           string
+	Dir            string
+	Page           int
+	PerPage        int
+	PerPageOptions []int
+	TotalPages     int
+	Total          int
+	RangeFrom      int
+	RangeTo        int
+	Columns        []adminFilesColumn
+	PageLinks      []adminFilesPageLink
+	HasPrev        bool
+	HasNext        bool
+	PrevHref       string
+	NextHref       string
+}
+
+// adminFilesQuery captures the listing state that every paginated link must
+// preserve.
+type adminFilesQuery struct {
+	Query string
+	Sort  string
+	Dir   string
+	Per   int
+}
+
+type adminFilesColumn struct {
+	Label     string
+	Href      string
+	Sorted    bool
+	Ascending bool
+}
+
+type adminFilesPageLink struct {
+	Page   int
+	Href   string
+	Active bool
+}
+
+type adminBoxEditData struct {
+	Section   string
+	PageTitle string
+	Box       adminBoxDetail
+	Files     []adminBoxEditFile
+	Notice    string
+	Error     string
+}
+
+type adminBoxDetail struct {
+	ID             string
+	Owner          string
+	CreatedAt      string
+	ExpiresLabel   string
+	ExpiresInput   string
+	NeverExpires   bool
+	MaxDownloads   int
+	DownloadCount  int
+	FileCount      int
+	TotalSize      string
+	BackendID      string
+	Protected      bool
+	Obfuscated     bool
+}
+
+type adminBoxEditFile struct {
+	ID           string
+	Name         string
+	Size         string
+	ContentType  string
+	ThumbnailURL string
+	DownloadURL  string
+	HasPreview   bool
+}
+
+// adminFileRow is the sortable/filterable representation of a box.
+type adminFileRow struct {
+	ID             string
+	Owner          string
+	CreatedAt      time.Time
+	ExpiresAt      time.Time
+	FileCount      int
+	DownloadCount  int
+	MaxDownloads   int
+	TotalSize      int64
+	TotalSizeLabel string
+	Protected      bool
+	Expired        bool
+}
+
+func (a *App) AdminFiles(w http.ResponseWriter, r *http.Request) {
+	if !a.requireAdmin(w, r) {
+		return
+	}
+
+	stats, err := a.uploadService.AdminStats()
+	if err != nil {
+		http.Error(w, "unable to load admin stats", http.StatusInternalServerError)
+		return
+	}
+	boxes, err := a.uploadService.AdminBoxes(0)
+	if err != nil {
+		http.Error(w, "unable to load boxes", http.StatusInternalServerError)
+		return
+	}
+
+	ownerCache := map[string]string{}
+	rows := make([]adminFileRow, 0, len(boxes))
+	for _, box := range boxes {
+		rows = append(rows, adminFileRow{
+			ID:             box.ID,
+			Owner:          a.boxOwnerLabel(box.OwnerID, ownerCache),
+			CreatedAt:      box.CreatedAt,
+			ExpiresAt:      box.ExpiresAt,
+			FileCount:      box.FileCount,
+			DownloadCount:  box.DownloadCount,
+			MaxDownloads:   box.MaxDownloads,
+			TotalSize:      box.TotalSize,
+			TotalSizeLabel: box.TotalSizeLabel,
+			Protected:      box.Protected,
+			Expired:        box.Expired,
+		})
+	}
+
+	query := strings.TrimSpace(r.URL.Query().Get("q"))
+	if query != "" {
+		needle := strings.ToLower(query)
+		filtered := rows[:0:0]
+		for _, row := range rows {
+			if strings.Contains(strings.ToLower(row.ID), needle) || strings.Contains(strings.ToLower(row.Owner), needle) {
+				filtered = append(filtered, row)
+			}
+		}
+		rows = filtered
+	}
+
+	sortKey := adminFilesSortKey(r.URL.Query().Get("sort"))
+	dir := r.URL.Query().Get("dir")
+	if dir != "asc" {
+		dir = "desc"
+	}
+	sortAdminFileRows(rows, sortKey, dir)
+
+	perPage := normalizePageSize(r.URL.Query().Get("per"), adminFilesDefaultPageSize, adminFilesPageSizes)
+	state := adminFilesQuery{Query: query, Sort: sortKey, Dir: dir, Per: perPage}
+
+	total := len(rows)
+	totalPages := (total + perPage - 1) / perPage
+	if totalPages < 1 {
+		totalPages = 1
+	}
+	page := 1
+	if parsed, err := strconv.Atoi(r.URL.Query().Get("page")); err == nil && parsed > 1 {
+		page = parsed
+	}
+	if page > totalPages {
+		page = totalPages
+	}
+	start := (page - 1) * perPage
+	if start > total {
+		start = total
+	}
+	end := start + perPage
+	if end > total {
+		end = total
+	}
+
+	views := make([]adminBoxView, 0, end-start)
+	for _, row := range rows[start:end] {
+		views = append(views, adminBoxView{
+			ID:             row.ID,
+			Owner:          row.Owner,
+			CreatedAt:      row.CreatedAt.Format("Jan 2, 2006 15:04"),
+			ExpiresAt:      boxExpiryLabel(row.ExpiresAt, "Jan 2, 2006 15:04"),
+			FileCount:      row.FileCount,
+			TotalSizeLabel: row.TotalSizeLabel,
+			DownloadCount:  row.DownloadCount,
+			MaxDownloads:   row.MaxDownloads,
+			Protected:      row.Protected,
+			Expired:        row.Expired,
+		})
+	}
+
+	rangeFrom := 0
+	if total > 0 {
+		rangeFrom = start + 1
+	}
+
+	a.renderPage(w, r, http.StatusOK, "admin_files.html", web.PageData{
+		Title:       "Admin files",
+		Description: "Manage Warpbox uploads.",
+		CurrentUser: a.currentPublicUser(r),
+		Data: adminFilesData{
+			Stats:          stats,
+			Section:        "files",
+			PageTitle:      "Files",
+			Boxes:          views,
+			Query:          query,
+			Sort:           sortKey,
+			Dir:            dir,
+			Page:           page,
+			PerPage:        perPage,
+			PerPageOptions: adminFilesPageSizes,
+			TotalPages:     totalPages,
+			Total:          total,
+			RangeFrom:      rangeFrom,
+			RangeTo:        end,
+			Columns:        adminFilesColumns(state, sortKey, dir),
+			PageLinks:      adminFilesPageLinks(state, page, totalPages),
+			HasPrev:        page > 1,
+			HasNext:        page < totalPages,
+			PrevHref:       adminFilesHref(state, page-1),
+			NextHref:       adminFilesHref(state, page+1),
+		},
+	})
+}
+
+func (a *App) boxOwnerLabel(ownerID string, cache map[string]string) string {
+	if ownerID == "" {
+		return "Anonymous"
+	}
+	if label, ok := cache[ownerID]; ok {
+		return label
+	}
+	label := "User"
+	if user, err := a.authService.UserByID(ownerID); err == nil {
+		label = user.Email
+	}
+	cache[ownerID] = label
+	return label
+}
+
+func adminFilesSortKey(value string) string {
+	switch value {
+	case "id", "owner", "files", "size", "downloads", "expires", "created":
+		return value
+	default:
+		return "created"
+	}
+}
+
+func sortAdminFileRows(rows []adminFileRow, sortKey, dir string) {
+	less := func(i, j int) bool {
+		a, b := rows[i], rows[j]
+		switch sortKey {
+		case "id":
+			return strings.ToLower(a.ID) < strings.ToLower(b.ID)
+		case "owner":
+			return strings.ToLower(a.Owner) < strings.ToLower(b.Owner)
+		case "files":
+			return a.FileCount < b.FileCount
+		case "size":
+			return a.TotalSize < b.TotalSize
+		case "downloads":
+			return a.DownloadCount < b.DownloadCount
+		case "expires":
+			return a.ExpiresAt.Before(b.ExpiresAt)
+		default:
+			return a.CreatedAt.Before(b.CreatedAt)
+		}
+	}
+	sort.SliceStable(rows, func(i, j int) bool {
+		if dir == "desc" {
+			return less(j, i)
+		}
+		return less(i, j)
+	})
+}
+
+func adminFilesColumns(state adminFilesQuery, sortKey, dir string) []adminFilesColumn {
+	defs := []struct{ Key, Label string }{
+		{"id", "Box"},
+		{"owner", "Owner"},
+		{"files", "Files"},
+		{"size", "Size"},
+		{"downloads", "Downloads"},
+		{"created", "Created"},
+		{"expires", "Expires"},
+	}
+	columns := make([]adminFilesColumn, 0, len(defs))
+	for _, def := range defs {
+		sorted := sortKey == def.Key
+		nextDir := "asc"
+		if sorted && dir == "asc" {
+			nextDir = "desc"
+		}
+		colState := state
+		colState.Sort = def.Key
+		colState.Dir = nextDir
+		columns = append(columns, adminFilesColumn{
+			Label:     def.Label,
+			Href:      adminFilesHref(colState, 1),
+			Sorted:    sorted,
+			Ascending: dir == "asc",
+		})
+	}
+	return columns
+}
+
+func adminFilesPageLinks(state adminFilesQuery, page, totalPages int) []adminFilesPageLink {
+	links := make([]adminFilesPageLink, 0, 5)
+	const window = 2
+	for p := page - window; p <= page+window; p++ {
+		if p < 1 || p > totalPages {
+			continue
+		}
+		links = append(links, adminFilesPageLink{
+			Page:   p,
+			Href:   adminFilesHref(state, p),
+			Active: p == page,
+		})
+	}
+	return links
+}
+
+func adminFilesHref(state adminFilesQuery, page int) string {
+	values := url.Values{}
+	if state.Query != "" {
+		values.Set("q", state.Query)
+	}
+	if state.Sort != "" && state.Sort != "created" {
+		values.Set("sort", state.Sort)
+	}
+	if state.Dir != "" && state.Dir != "desc" {
+		values.Set("dir", state.Dir)
+	}
+	if state.Per > 0 && state.Per != adminFilesDefaultPageSize {
+		values.Set("per", strconv.Itoa(state.Per))
+	}
+	if page > 1 {
+		values.Set("page", strconv.Itoa(page))
+	}
+	if len(values) == 0 {
+		return "/admin/files"
+	}
+	return "/admin/files?" + values.Encode()
+}
+
+// normalizePageSize parses a requested page size, falling back to def when the
+// value is missing or not one of the allowed sizes.
+func normalizePageSize(raw string, def int, allowed []int) int {
+	parsed, err := strconv.Atoi(strings.TrimSpace(raw))
+	if err != nil {
+		return def
+	}
+	for _, size := range allowed {
+		if size == parsed {
+			return parsed
+		}
+	}
+	return def
+}
+
+func (a *App) AdminEditBox(w http.ResponseWriter, r *http.Request) {
+	if !a.requireAdmin(w, r) {
+		return
+	}
+	box, err := a.uploadService.GetBox(r.PathValue("boxID"))
+	if err != nil {
+		http.NotFound(w, r)
+		return
+	}
+
+	var totalSize int64
+	files := make([]adminBoxEditFile, 0, len(box.Files))
+	for _, file := range box.Files {
+		totalSize += file.Size
+		files = append(files, adminBoxEditFile{
+			ID:           file.ID,
+			Name:         file.Name,
+			Size:         helpers.FormatBytes(file.Size),
+			ContentType:  file.ContentType,
+			ThumbnailURL: fmt.Sprintf("/d/%s/thumb/%s", box.ID, file.ID),
+			DownloadURL:  fmt.Sprintf("/d/%s/f/%s", box.ID, file.ID),
+			HasPreview:   file.PreviewKind == "image" || file.PreviewKind == "video",
+		})
+	}
+
+	never := neverExpires(box.ExpiresAt)
+	expiresInput := ""
+	if !never {
+		expiresInput = box.ExpiresAt.UTC().Format("2006-01-02T15:04")
+	}
+
+	cache := map[string]string{}
+	a.renderPage(w, r, http.StatusOK, "admin_box_edit.html", web.PageData{
+		Title:       "Edit box",
+		Description: "Edit a Warpbox upload.",
+		CurrentUser: a.currentPublicUser(r),
+		Data: adminBoxEditData{
+			Section:   "files",
+			PageTitle: "Edit box",
+			Notice:    r.URL.Query().Get("notice"),
+			Error:     r.URL.Query().Get("error"),
+			Files:     files,
+			Box: adminBoxDetail{
+				ID:            box.ID,
+				Owner:         a.boxOwnerLabel(box.OwnerID, cache),
+				CreatedAt:     box.CreatedAt.Format("Jan 2, 2006 15:04 MST"),
+				ExpiresLabel:  boxExpiryLabel(box.ExpiresAt, "Jan 2, 2006 15:04 MST"),
+				ExpiresInput:  expiresInput,
+				NeverExpires:  never,
+				MaxDownloads:  box.MaxDownloads,
+				DownloadCount: box.DownloadCount,
+				FileCount:     len(box.Files),
+				TotalSize:     helpers.FormatBytes(totalSize),
+				BackendID:     a.uploadService.BoxStorageBackendID(box),
+				Protected:     a.uploadService.IsProtected(box),
+				Obfuscated:    box.Obfuscate,
+			},
+		},
+	})
+}
+
+func (a *App) AdminUpdateBox(w http.ResponseWriter, r *http.Request) {
+	if !a.requireAdmin(w, r) || !a.validateCSRF(w, r) {
+		return
+	}
+	boxID := r.PathValue("boxID")
+	if err := r.ParseForm(); err != nil {
+		http.Redirect(w, r, "/admin/boxes/"+boxID+"/edit?error=Could+not+read+form", http.StatusSeeOther)
+		return
+	}
+
+	var expiresAt time.Time
+	if r.FormValue("never_expires") == "on" {
+		expiresAt = time.Now().UTC().AddDate(100, 0, 0)
+	} else {
+		parsed, err := time.Parse("2006-01-02T15:04", strings.TrimSpace(r.FormValue("expires_at")))
+		if err != nil {
+			http.Redirect(w, r, "/admin/boxes/"+boxID+"/edit?error=Invalid+expiration+date", http.StatusSeeOther)
+			return
+		}
+		expiresAt = parsed.UTC()
+	}
+
+	maxDownloads := parsePositiveInt(r.FormValue("max_downloads"))
+	removePassword := r.FormValue("remove_password") == "on"
+
+	if err := a.uploadService.AdminUpdateBox(boxID, expiresAt, maxDownloads, removePassword); err != nil {
+		a.logger.Warn("admin box update failed", "source", "admin", "severity", "warn", "code", 4306, "box_id", boxID, "error", err.Error())
+		http.Redirect(w, r, "/admin/boxes/"+boxID+"/edit?error=Could+not+save+changes", http.StatusSeeOther)
+		return
+	}
+	a.logger.Info("admin box updated", "source", "admin", "severity", "user_activity", "code", 2306, "ip", uploadClientIP(r), "box_id", boxID)
+	http.Redirect(w, r, "/admin/boxes/"+boxID+"/edit?notice=Changes+saved", http.StatusSeeOther)
+}
+
+func (a *App) AdminDeleteBoxFile(w http.ResponseWriter, r *http.Request) {
+	if !a.requireAdmin(w, r) || !a.validateCSRF(w, r) {
+		return
+	}
+	boxID := r.PathValue("boxID")
+	fileID := r.PathValue("fileID")
+	boxDeleted, err := a.uploadService.RemoveFileFromBox(boxID, fileID)
+	if err != nil {
+		a.logger.Warn("admin file delete failed", "source", "admin", "severity", "warn", "code", 4305, "box_id", boxID, "file_id", fileID, "error", err.Error())
+		http.Redirect(w, r, "/admin/boxes/"+boxID+"/edit?error=Could+not+remove+file", http.StatusSeeOther)
+		return
+	}
+	a.logger.Info("admin removed box file", "source", "admin", "severity", "user_activity", "code", 2305, "ip", uploadClientIP(r), "box_id", boxID, "file_id", fileID)
+	if boxDeleted {
+		http.Redirect(w, r, "/admin/files?notice=Box+deleted+(last+file+removed)", http.StatusSeeOther)
+		return
+	}
+	http.Redirect(w, r, "/admin/boxes/"+boxID+"/edit?notice=File+removed", http.StatusSeeOther)
+}

backend/libs/handlers/api_docs.go

@@ -10,29 +10,41 @@ import (
 type apiDocsData struct {
 	BaseURL             string
 	UploadURL           string
-	HealthURL           string
 	RequestSchemaURL    string
 	ResponseSchemaURL   string
 	ShareXExamplePath   string
 	ShareXExampleURL    string
 	ShareXDownloadURL   string
 	ShareXFileFieldName string
+	ShareXGroupWindow   string
 }
 
 func (a *App) APIDocs(w http.ResponseWriter, r *http.Request) {
+	user, loggedIn := a.currentUser(r)
+	actor := "anonymous"
+	if loggedIn {
+		actor = "user"
+	}
+	a.logger.Info("api docs viewed", withRequestLogAttrs(r,
+		"source", "page",
+		"severity", "user_activity",
+		"code", 2501,
+		"actor", actor,
+		"user_id", user.ID,
+	)...)
 	a.renderPage(w, r, http.StatusOK, "api.html", web.PageData{
 		Title:       "API documentation",
 		Description: "Curl and ShareX upload examples for Warpbox.",
 		Data: apiDocsData{
 			BaseURL:             a.cfg.BaseURL,
 			UploadURL:           a.cfg.BaseURL + "/api/v1/upload",
-			HealthURL:           a.cfg.BaseURL + "/api/v1/health",
 			RequestSchemaURL:    a.cfg.BaseURL + "/api/v1/schemas/upload-request.json",
 			ResponseSchemaURL:   a.cfg.BaseURL + "/api/v1/schemas/upload-response.json",
 			ShareXExamplePath:   "examples/sharex/warpbox-anonymous.sxcu",
 			ShareXExampleURL:    a.cfg.BaseURL + "/api/v1/upload",
 			ShareXDownloadURL:   a.cfg.BaseURL + "/api/v1/sharex/warpbox-anonymous.sxcu",
 			ShareXFileFieldName: "sharex",
+			ShareXGroupWindow:   uploadGroupWindow.String(),
 		},
 	})
 }
@@ -47,11 +59,16 @@ func (a *App) ShareXAnonymousConfig(w http.ResponseWriter, r *http.Request) {
 		"RequestURL":      a.cfg.BaseURL + "/api/v1/upload",
 		"Headers": map[string]string{
 			"Accept": "application/json",
+			// Group a multi-file selection (sent as back-to-back requests) into
+			// one box. Remove this header for one box per file.
+			uploadBatchHeader: "sharex",
 		},
 		"Body":         "MultipartFormData",
 		"FileFormName": "sharex",
-		"URL":          "$json:boxUrl$",
+		"URL":          "{json:boxUrl}",
-		"DeletionURL":  "$json:manageUrl$",
+		"ThumbnailURL": "{json:thumbnailUrl}",
+		"DeletionURL":  "{json:deleteUrl}",
+		"ErrorMessage": "{json:error}",
 	})
 }
 
@@ -109,22 +126,24 @@ func (a *App) UploadResponseSchema(w http.ResponseWriter, r *http.Request) {
 		"type":        "object",
 		"required":    []string{"boxId", "boxUrl", "zipUrl", "manageUrl", "deleteUrl", "expiresAt", "files"},
 		"properties": map[string]any{
-			"boxId":     map[string]any{"type": "string"},
+			"boxId":        map[string]any{"type": "string"},
-			"boxUrl":    map[string]any{"type": "string", "format": "uri"},
+			"boxUrl":       map[string]any{"type": "string", "format": "uri"},
-			"zipUrl":    map[string]any{"type": "string", "format": "uri"},
+			"zipUrl":       map[string]any{"type": "string", "format": "uri"},
-			"manageUrl": map[string]any{"type": "string", "format": "uri", "description": "Private bearer URL for managing/deleting this upload. Returned only at upload time."},
+			"thumbnailUrl": map[string]any{"type": "string", "format": "uri", "description": "Thumbnail of the most recently uploaded file (placeholder until generated)."},
-			"deleteUrl": map[string]any{"type": "string", "format": "uri", "description": "Private bearer POST URL for deleting this upload. Returned only at upload time."},
+			"manageUrl":    map[string]any{"type": "string", "format": "uri", "description": "Private bearer URL for managing/deleting this upload. Returned only at upload time."},
-			"expiresAt": map[string]any{"type": "string", "format": "date-time"},
+			"deleteUrl":    map[string]any{"type": "string", "format": "uri", "description": "Private bearer URL for deleting this upload (GET or POST). Returned only at upload time."},
+			"expiresAt":    map[string]any{"type": "string", "format": "date-time"},
 			"files": map[string]any{
 				"type": "array",
 				"items": map[string]any{
 					"type":     "object",
 					"required": []string{"id", "name", "size", "url"},
 					"properties": map[string]any{
-						"id":   map[string]any{"type": "string"},
+						"id":           map[string]any{"type": "string"},
-						"name": map[string]any{"type": "string"},
+						"name":         map[string]any{"type": "string"},
-						"size": map[string]any{"type": "string"},
+						"size":         map[string]any{"type": "string"},
-						"url":  map[string]any{"type": "string", "format": "uri"},
+						"url":          map[string]any{"type": "string", "format": "uri"},
+						"thumbnailUrl": map[string]any{"type": "string", "format": "uri"},
 					},
 				},
 			},

backend/libs/handlers/app.go

@@ -16,10 +16,18 @@ type App struct {
 	uploadService   *services.UploadService
 	authService     *services.AuthService
 	settingsService *services.SettingsService
+	reactionService *services.ReactionService
+	banService      *services.BanService
 	rateLimiter     *rateLimiter
+	uploadGroups    *uploadGrouper
+	fileIcons       *fileIconSet
 }
 
-func NewApp(cfg config.Config, logger *slog.Logger, renderer *web.Renderer, uploadService *services.UploadService, authService *services.AuthService, settingsService *services.SettingsService) *App {
+func NewApp(cfg config.Config, logger *slog.Logger, renderer *web.Renderer, uploadService *services.UploadService, authService *services.AuthService, settingsService *services.SettingsService, reactionService *services.ReactionService, banService *services.BanService) *App {
+	fileIcons, err := loadFileIcons(cfg.StaticDir)
+	if err != nil {
+		logger.Warn("failed to load file icon map", "source", "handlers", "severity", "warn", "error", err.Error())
+	}
 	return &App{
 		cfg:             cfg,
 		logger:          logger,
@@ -27,7 +35,11 @@ func NewApp(cfg config.Config, logger *slog.Logger, renderer *web.Renderer, uplo
 		uploadService:   uploadService,
 		authService:     authService,
 		settingsService: settingsService,
+		reactionService: reactionService,
+		banService:      banService,
 		rateLimiter:     newRateLimiter(),
+		uploadGroups:    newUploadGrouper(),
+		fileIcons:       fileIcons,
 	}
 }
 
@@ -67,6 +79,13 @@ func (a *App) RegisterRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("GET /admin/users/{userID}/edit", a.AdminEditUser)
 	mux.HandleFunc("GET /admin/settings", a.AdminSettings)
 	mux.HandleFunc("POST /admin/settings", a.AdminSettingsPost)
+	mux.HandleFunc("GET /admin/logs", a.AdminLogs)
+	mux.HandleFunc("GET /admin/bans", a.AdminBans)
+	mux.HandleFunc("POST /admin/bans", a.AdminCreateBan)
+	mux.HandleFunc("POST /admin/bans/{banID}/unban", a.AdminUnban)
+	mux.HandleFunc("POST /admin/bans/settings", a.AdminBanSettingsPost)
+	mux.HandleFunc("POST /admin/bans/rules", a.AdminBanRulesPost)
+	mux.HandleFunc("POST /admin/bans/rules/{ruleID}/delete", a.AdminBanRuleDelete)
 	mux.HandleFunc("GET /admin/storage", a.AdminStorage)
 	mux.HandleFunc("GET /admin/storage/new", a.AdminNewStorage)
 	mux.HandleFunc("GET /admin/storage/new/s3", a.AdminNewStorageProvider)
@@ -85,7 +104,6 @@ func (a *App) RegisterRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("POST /admin/storage/{backendID}/edit", a.AdminEditStorage)
 	mux.HandleFunc("POST /admin/storage/{backendID}/test", a.AdminTestStorage)
 	mux.HandleFunc("POST /admin/storage/{backendID}/speed-test", a.AdminStartStorageSpeedTest)
-	mux.HandleFunc("POST /admin/storage/{backendID}/disable", a.AdminDisableStorage)
 	mux.HandleFunc("POST /admin/storage/{backendID}/delete", a.AdminDeleteStorage)
 	mux.HandleFunc("POST /admin/storage/jobs/cleanup", a.AdminRunStorageCleanup)
 	mux.HandleFunc("POST /admin/storage/jobs/thumbnails", a.AdminRunStorageThumbnails)
@@ -98,23 +116,45 @@ func (a *App) RegisterRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("POST /admin/users/{userID}/policy", a.AdminUpdateUserPolicy)
 	mux.HandleFunc("POST /admin/users/{userID}/storage", a.AdminUpdateUserStorage)
 	mux.HandleFunc("GET /admin/boxes/{boxID}/view", a.AdminViewBox)
+	mux.HandleFunc("GET /admin/boxes/{boxID}/edit", a.AdminEditBox)
+	mux.HandleFunc("POST /admin/boxes/{boxID}/edit", a.AdminUpdateBox)
+	mux.HandleFunc("POST /admin/boxes/{boxID}/files/{fileID}/delete", a.AdminDeleteBoxFile)
 	mux.HandleFunc("POST /admin/boxes/{boxID}/delete", a.AdminDeleteBox)
 	mux.HandleFunc("GET /d/{boxID}", a.DownloadPage)
 	mux.HandleFunc("GET /d/{boxID}/deleted", a.ManageDeleted)
 	mux.HandleFunc("GET /d/{boxID}/manage/{token}", a.ManageBox)
 	mux.HandleFunc("POST /d/{boxID}/manage/{token}/delete", a.ManageDeleteBox)
+	// GET variant so ShareX (which issues a GET to the configured DeletionURL)
+	// can delete a box via its secret one-time delete token.
+	mux.HandleFunc("GET /d/{boxID}/manage/{token}/delete", a.ManageDeleteBox)
 	mux.HandleFunc("POST /d/{boxID}/unlock", a.UnlockBox)
 	mux.HandleFunc("GET /d/{boxID}/zip", a.DownloadZip)
+	mux.HandleFunc("POST /d/{boxID}/f/{fileID}/react", a.ReactToFile)
 	mux.HandleFunc("GET /d/{boxID}/f/{fileID}", a.DownloadFile)
 	mux.HandleFunc("GET /d/{boxID}/f/{fileID}/download", a.DownloadFileContent)
+	mux.HandleFunc("GET /d/{boxID}/f/{fileID}/og-image.jpg", a.FileOGImage)
 	mux.HandleFunc("GET /d/{boxID}/thumb/{fileID}", a.Thumbnail)
 	mux.HandleFunc("GET /d/{boxID}/og-image.jpg", a.BoxOGImage)
+	mux.HandleFunc("GET /robots.txt", a.RobotsTxt)
+	mux.HandleFunc("GET /sitemap.xml", a.SitemapXML)
 	mux.HandleFunc("GET /health", a.Health)
-	mux.HandleFunc("GET /healthz", a.Health)
+	mux.HandleFunc("GET /healthz", notFound)
-	mux.HandleFunc("GET /api/v1/health", a.Health)
+	mux.HandleFunc("GET /api/v1/health", notFound)
 	mux.HandleFunc("GET /api/v1/sharex/warpbox-anonymous.sxcu", a.ShareXAnonymousConfig)
 	mux.HandleFunc("GET /api/v1/schemas/upload-request.json", a.UploadRequestSchema)
 	mux.HandleFunc("GET /api/v1/schemas/upload-response.json", a.UploadResponseSchema)
 	mux.HandleFunc("POST /api/v1/upload", a.Upload)
+	mux.HandleFunc("POST /api/v1/uploads/resumable", a.CreateResumableUpload)
+	mux.HandleFunc("GET /api/v1/uploads/resumable/{sessionID}", a.ResumableUploadStatus)
+	mux.HandleFunc("POST /api/v1/uploads/resumable/{sessionID}/files", a.AddResumableFiles)
+	mux.HandleFunc("PUT /api/v1/uploads/resumable/{sessionID}/files/{fileID}/chunks/{index}", a.PutResumableChunk)
+	mux.HandleFunc("POST /api/v1/uploads/resumable/{sessionID}/complete", a.CompleteResumableUpload)
+	mux.HandleFunc("POST /api/v1/uploads/resumable/{sessionID}/complete-uploaded", a.CompleteUploadedResumableUpload)
+	mux.HandleFunc("DELETE /api/v1/uploads/resumable/{sessionID}", a.CancelResumableUpload)
+	mux.HandleFunc("GET /emoji/{pack}/{file}", a.EmojiAsset)
 	mux.Handle("GET /static/", a.Static())
 }
+
+func notFound(w http.ResponseWriter, r *http.Request) {
+	http.NotFound(w, r)
+}

backend/libs/handlers/auth.go

@@ -35,6 +35,7 @@ func (a *App) Register(w http.ResponseWriter, r *http.Request) {
 
 func (a *App) RegisterPost(w http.ResponseWriter, r *http.Request) {
 	if !a.rateLimiter.Allow("register:"+uploadClientIP(r), 10, time.Minute, time.Now().UTC()) {
+		a.logger.Warn("registration rate limited", withRequestLogAttrs(r, "source", "auth", "severity", "warn", "code", 4291)...)
 		a.renderAuth(w, r, http.StatusTooManyRequests, authPageData{Mode: "register", Error: "Too many registration attempts."})
 		return
 	}
@@ -44,10 +45,11 @@ func (a *App) RegisterPost(w http.ResponseWriter, r *http.Request) {
 	}
 	user, err := a.authService.CreateBootstrapUser(r.FormValue("username"), r.FormValue("email"), r.FormValue("password"))
 	if err != nil {
+		a.logger.Warn("bootstrap registration failed", withRequestLogAttrs(r, "source", "auth", "severity", "warn", "code", 4400, "email", r.FormValue("email"), "error", err.Error())...)
 		a.renderAuth(w, r, http.StatusBadRequest, authPageData{Mode: "register", Error: err.Error()})
 		return
 	}
-	a.logger.Info("first admin created", "source", "auth", "severity", "user_activity", "code", 2401, "user_id", user.ID)
+	a.logger.Info("first admin created", withRequestLogAttrs(r, "source", "auth", "severity", "user_activity", "code", 2401, "user_id", user.ID)...)
 	a.loginAndRedirect(w, r, user.Email, r.FormValue("password"), "/app")
 }
 
@@ -56,11 +58,13 @@ func (a *App) Login(w http.ResponseWriter, r *http.Request) {
 		http.Redirect(w, r, "/app", http.StatusSeeOther)
 		return
 	}
+	a.logger.Info("login page viewed", withRequestLogAttrs(r, "source", "page", "severity", "user_activity", "code", 2503, "actor", "anonymous")...)
 	a.renderAuth(w, r, http.StatusOK, authPageData{Mode: "login", ReturnPath: r.URL.Query().Get("next")})
 }
 
 func (a *App) LoginPost(w http.ResponseWriter, r *http.Request) {
 	if !a.rateLimiter.Allow("login:"+uploadClientIP(r), 10, time.Minute, time.Now().UTC()) {
+		a.logger.Warn("login rate limited", withRequestLogAttrs(r, "source", "auth", "severity", "warn", "code", 4292, "email", r.FormValue("email"))...)
 		a.renderAuth(w, r, http.StatusTooManyRequests, authPageData{Mode: "login", Error: "Too many login attempts."})
 		return
 	}
@@ -74,12 +78,13 @@ func (a *App) LoginPost(w http.ResponseWriter, r *http.Request) {
 	}
 	user, token, err := a.authService.Login(r.FormValue("email"), r.FormValue("password"))
 	if err != nil {
-		a.logger.Warn("login failed", "source", "auth", "severity", "warn", "code", 4401, "email", r.FormValue("email"))
+		a.logger.Warn("login failed", withRequestLogAttrs(r, "source", "auth", "severity", "warn", "code", 4401, "email", r.FormValue("email"))...)
+		a.recordLoginAbuse(r, services.AbuseKindUserLogin, "user login failed")
 		a.renderAuth(w, r, http.StatusUnauthorized, authPageData{Mode: "login", Error: "Invalid email or password.", ReturnPath: next})
 		return
 	}
 	a.setUserSessionCookie(w, r, token)
-	a.logger.Info("user login", "source", "auth", "severity", "user_activity", "code", 2402, "user_id", user.ID)
+	a.logger.Info("user login", withRequestLogAttrs(r, "source", "auth", "severity", "user_activity", "code", 2402, "user_id", user.ID)...)
 	http.Redirect(w, r, safeReturnPath(next), http.StatusSeeOther)
 }
 
@@ -87,6 +92,9 @@ func (a *App) Logout(w http.ResponseWriter, r *http.Request) {
 	if !a.validateCSRF(w, r) {
 		return
 	}
+	if user, ok := a.currentUser(r); ok {
+		a.logger.Info("user logout", withRequestLogAttrs(r, "source", "auth", "severity", "user_activity", "code", 2405, "user_id", user.ID)...)
+	}
 	if cookie, err := r.Cookie(userSessionCookieName); err == nil {
 		_ = a.authService.Logout(cookie.Value)
 	}
@@ -100,6 +108,7 @@ func (a *App) Invite(w http.ResponseWriter, r *http.Request) {
 		a.renderAuth(w, r, http.StatusNotFound, authPageData{Mode: "invite", Error: "This invite is invalid or expired."})
 		return
 	}
+	a.logger.Info("invite page viewed", withRequestLogAttrs(r, "source", "page", "severity", "user_activity", "code", 2504, "invite_email", invite.Email, "reset", invite.UserID != "")...)
 	a.renderAuth(w, r, http.StatusOK, authPageData{Mode: "invite", Token: r.PathValue("token"), Email: invite.Email, IsReset: invite.UserID != ""})
 }
 
@@ -107,6 +116,7 @@ func (a *App) InvitePost(w http.ResponseWriter, r *http.Request) {
 	token := r.PathValue("token")
 	invite, err := a.authService.InviteByToken(token)
 	if err != nil {
+		a.logger.Warn("invite accept invalid", withRequestLogAttrs(r, "source", "auth", "severity", "warn", "code", 4404)...)
 		a.renderAuth(w, r, http.StatusNotFound, authPageData{Mode: "invite", Error: "This invite is invalid or expired."})
 		return
 	}
@@ -116,10 +126,11 @@ func (a *App) InvitePost(w http.ResponseWriter, r *http.Request) {
 	}
 	user, err := a.authService.AcceptInvite(token, r.FormValue("username"), r.FormValue("password"))
 	if err != nil {
+		a.logger.Warn("invite accept failed", withRequestLogAttrs(r, "source", "auth", "severity", "warn", "code", 4405, "invite_email", invite.Email, "error", err.Error())...)
 		a.renderAuth(w, r, http.StatusBadRequest, authPageData{Mode: "invite", Token: token, Email: invite.Email, IsReset: invite.UserID != "", Error: err.Error()})
 		return
 	}
-	a.logger.Info("invite accepted", "source", "auth", "severity", "user_activity", "code", 2403, "user_id", user.ID)
+	a.logger.Info("invite accepted", withRequestLogAttrs(r, "source", "auth", "severity", "user_activity", "code", 2403, "user_id", user.ID, "invite_email", invite.Email)...)
 	a.loginAndRedirect(w, r, user.Email, r.FormValue("password"), "/app")
 }
 
@@ -144,6 +155,7 @@ func (a *App) AccountSettings(w http.ResponseWriter, r *http.Request) {
 	if !ok {
 		return
 	}
+	a.logger.Info("account settings viewed", withRequestLogAttrs(r, "source", "page", "severity", "user_activity", "code", 2505, "user_id", user.ID)...)
 	a.renderAccount(w, r, http.StatusOK, user, accountData{})
 }
 
@@ -161,11 +173,11 @@ func (a *App) CreateUserToken(w http.ResponseWriter, r *http.Request) {
 	}
 	result, err := a.authService.CreateAPIToken(user.ID, r.FormValue("name"))
 	if err != nil {
-		a.logger.Warn("api token create failed", "source", "user_activity", "severity", "warn", "code", 4420, "user_id", user.ID, "error", err.Error())
+		a.logger.Warn("api token create failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4420, "user_id", user.ID, "error", err.Error())...)
 		a.renderAccount(w, r, http.StatusBadRequest, user, accountData{Error: "Could not create token."})
 		return
 	}
-	a.logger.Info("api token created", "source", "user_activity", "severity", "user_activity", "code", 2420, "user_id", user.ID, "token_id", result.Token.ID)
+	a.logger.Info("api token created", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2420, "user_id", user.ID, "token_id", result.Token.ID)...)
 	a.renderAccount(w, r, http.StatusOK, user, accountData{NewToken: result.Plaintext})
 }
 
@@ -175,7 +187,9 @@ func (a *App) DeleteUserToken(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := a.authService.DeleteAPIToken(user.ID, r.PathValue("tokenID")); err != nil {
-		a.logger.Warn("api token delete failed", "source", "user_activity", "severity", "warn", "code", 4421, "user_id", user.ID, "error", err.Error())
+		a.logger.Warn("api token delete failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4421, "user_id", user.ID, "error", err.Error())...)
+	} else {
+		a.logger.Info("api token deleted", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2421, "user_id", user.ID, "token_id", r.PathValue("tokenID"))...)
 	}
 	http.Redirect(w, r, "/account/settings", http.StatusSeeOther)
 }
@@ -222,13 +236,16 @@ func (a *App) ChangePassword(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if !services.VerifyPasswordHash(user.PasswordHash, r.FormValue("current_password")) {
+		a.logger.Warn("password change failed current password", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4422, "user_id", user.ID)...)
 		http.Redirect(w, r, "/account/settings", http.StatusSeeOther)
 		return
 	}
 	if err := a.authService.SetPassword(user.ID, r.FormValue("new_password")); err != nil {
+		a.logger.Warn("password change failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4423, "user_id", user.ID, "error", err.Error())...)
 		http.Redirect(w, r, "/account/settings", http.StatusSeeOther)
 		return
 	}
+	a.logger.Info("password changed", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2422, "user_id", user.ID)...)
 	http.Redirect(w, r, "/account/settings", http.StatusSeeOther)
 }
 

backend/libs/handlers/dashboard.go

@@ -42,6 +42,12 @@ func (a *App) Dashboard(w http.ResponseWriter, r *http.Request) {
 	if !ok {
 		return
 	}
+	a.logger.Info("user dashboard viewed", withRequestLogAttrs(r,
+		"source", "page",
+		"severity", "user_activity",
+		"code", 2502,
+		"user_id", user.ID,
+	)...)
 	collections, err := a.authService.ListCollections(user.ID)
 	if err != nil {
 		http.Error(w, "unable to load collections", http.StatusInternalServerError)
@@ -82,7 +88,7 @@ func (a *App) Dashboard(w http.ResponseWriter, r *http.Request) {
 			FileCount:      len(row.Box.Files),
 			Size:           row.TotalSizeLabel,
 			CreatedAt:      row.Box.CreatedAt.Format("Jan 2 15:04"),
-			ExpiresAt:      row.Box.ExpiresAt.Format("Jan 2 15:04"),
+			ExpiresAt:      boxExpiryLabel(row.Box.ExpiresAt, "Jan 2 15:04"),
 			URL:            "/d/" + row.Box.ID,
 		})
 	}
@@ -112,7 +118,9 @@ func (a *App) CreateCollection(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if _, err := a.authService.CreateCollection(user.ID, r.FormValue("name")); err != nil {
-		a.logger.Warn("collection create failed", "source", "user_activity", "severity", "warn", "code", 4410, "user_id", user.ID, "error", err.Error())
+		a.logger.Warn("collection create failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4410, "user_id", user.ID, "error", err.Error())...)
+	} else {
+		a.logger.Info("collection created", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2410, "user_id", user.ID, "name", r.FormValue("name"))...)
 	}
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
@@ -127,9 +135,11 @@ func (a *App) RenameUserBox(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := a.uploadService.RenameOwnedBox(r.PathValue("boxID"), user.ID, r.FormValue("title")); err != nil {
+		a.logger.Warn("owned box rename failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4411, "user_id", user.ID, "box_id", r.PathValue("boxID"), "error", err.Error())...)
 		a.handleUserBoxError(w, r, err)
 		return
 	}
+	a.logger.Info("owned box renamed", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2411, "user_id", user.ID, "box_id", r.PathValue("boxID"))...)
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
 
@@ -144,13 +154,16 @@ func (a *App) MoveUserBox(w http.ResponseWriter, r *http.Request) {
 	}
 	collectionID := r.FormValue("collection_id")
 	if !a.authService.CollectionOwnedBy(collectionID, user.ID) {
+		a.logger.Warn("owned box move invalid collection", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4412, "user_id", user.ID, "box_id", r.PathValue("boxID"), "collection_id", collectionID)...)
 		http.Error(w, "collection not found", http.StatusForbidden)
 		return
 	}
 	if err := a.uploadService.MoveOwnedBox(r.PathValue("boxID"), user.ID, collectionID); err != nil {
+		a.logger.Warn("owned box move failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4413, "user_id", user.ID, "box_id", r.PathValue("boxID"), "error", err.Error())...)
 		a.handleUserBoxError(w, r, err)
 		return
 	}
+	a.logger.Info("owned box moved", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2412, "user_id", user.ID, "box_id", r.PathValue("boxID"), "collection_id", collectionID)...)
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
 
@@ -160,9 +173,11 @@ func (a *App) DeleteUserBox(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := a.uploadService.DeleteOwnedBox(r.PathValue("boxID"), user.ID); err != nil {
+		a.logger.Warn("owned box delete failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4414, "user_id", user.ID, "box_id", r.PathValue("boxID"), "error", err.Error())...)
 		a.handleUserBoxError(w, r, err)
 		return
 	}
+	a.logger.Info("owned box deleted", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2413, "user_id", user.ID, "box_id", r.PathValue("boxID"))...)
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
 

backend/libs/handlers/download.go

@@ -2,16 +2,20 @@ package handlers
 
 import (
 	"bytes"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
 	"net/http"
+	"net/url"
 	"os"
 	"path/filepath"
+	"sort"
 	"strings"
 	"time"
 
 	"warpbox.dev/backend/libs/helpers"
+	"warpbox.dev/backend/libs/jobs"
 	"warpbox.dev/backend/libs/services"
 	"warpbox.dev/backend/libs/web"
 )
@@ -26,6 +30,7 @@ type downloadPageData struct {
 	DownloadCount int
 	MaxDownloads  int
 	ExpiresLabel  string
+	EmojiTabs     []emojiTabView
 }
 
 type boxView struct {
@@ -36,11 +41,40 @@ type fileView struct {
 	ID           string
 	Name         string
 	Size         string
+	SizeBytes    int64
 	ContentType  string
 	PreviewKind  string
 	URL          string
 	DownloadURL  string
 	ThumbnailURL string
+	HasThumbnail bool
+	IconURL      string
+	IconRetroURL string
+	ReactURL     string
+	Reactions    []reactionView
+	ReactionMore int
+	Reacted      bool
+	Processing   bool
+}
+
+type reactionView struct {
+	EmojiID string `json:"emojiId"`
+	URL     string `json:"url"`
+	Label   string `json:"label"`
+	Count   int    `json:"count"`
+	Visible bool   `json:"visible"`
+}
+
+type emojiTabView struct {
+	ID     string
+	Label  string
+	Emojis []emojiOptionView
+}
+
+type emojiOptionView struct {
+	ID    string `json:"id"`
+	URL   string `json:"url"`
+	Label string `json:"label"`
 }
 
 type previewPageData struct {
@@ -53,10 +87,12 @@ type previewPageData struct {
 func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
 	box, err := a.uploadService.GetBox(r.PathValue("boxID"))
 	if err != nil {
+		a.logger.Warn("download page missing box", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4040, "box_id", r.PathValue("boxID"))...)
 		http.NotFound(w, r)
 		return
 	}
 	if err := a.uploadService.CanDownload(box); err != nil {
+		a.logger.Warn("download page unavailable", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", statusForDownloadError(err), "box_id", box.ID, "error", err.Error())...)
 		a.renderPage(w, r, http.StatusForbidden, "download.html", web.PageData{
 			Title:       "Download unavailable",
 			Description: "This Warpbox link is no longer available.",
@@ -68,26 +104,69 @@ func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	locked := a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box)
+	if isSocialPreviewBot(r) && !locked && len(box.Files) == 1 {
+		file := box.Files[0]
+		if file.Processing {
+			http.Error(w, "file is still processing", http.StatusAccepted)
+			return
+		}
+		if shouldServeRawSocialMedia(file) {
+			a.serveFileContent(w, r, box, file, false)
+			a.logger.Info("single-file media served inline for social preview", withRequestLogAttrs(r, "source", "download", "severity", "user_activity", "code", 2008, "box_id", box.ID, "file_id", file.ID)...)
+			return
+		}
+	}
+	visitorID := a.reactionVisitorID(w, r)
+	reactionsByFile, reactedByFile, err := a.reactionService.SummaryForBox(box.ID, visitorID)
+	if err != nil {
+		a.logger.Warn("failed to load file reactions", withRequestLogAttrs(r, "source", "reactions", "severity", "warn", "code", 4300, "box_id", box.ID, "error", err.Error())...)
+	}
 
 	files := make([]fileView, 0, len(box.Files))
 	if !(locked && box.Obfuscate) {
 		for _, file := range box.Files {
-			files = append(files, a.fileView(box, file))
+			files = append(files, a.fileViewWithReactions(box, file, reactionsByFile[file.ID], reactedByFile[file.ID]))
 		}
 	}
+	emojiTabs, err := a.emojiTabs()
+	if err != nil {
+		a.logger.Warn("failed to load emoji tabs", withRequestLogAttrs(r, "source", "reactions", "severity", "warn", "code", 4301, "box_id", box.ID, "error", err.Error())...)
+	}
 
-	expiresLabel := box.ExpiresAt.Format("Jan 2, 2006 15:04 MST")
+	expiresLabel := boxExpiryLabel(box.ExpiresAt, "Jan 2, 2006 15:04 MST")
 	title := "Shared files on Warpbox"
 	description := fmt.Sprintf("%d file%s shared via Warpbox · expires %s", len(box.Files), plural(len(box.Files)), expiresLabel)
+	ogImage := absoluteURL(r, fmt.Sprintf("/d/%s/og-image.jpg", box.ID))
+	imageAlt := fmt.Sprintf("%d shared file%s on Warp Box", len(box.Files), plural(len(box.Files)))
+	imageType := "image/jpeg"
+	if !locked && len(box.Files) == 1 && !box.Files[0].Processing {
+		file := box.Files[0]
+		view := a.fileView(box, file)
+		fileSize := helpers.FormatBytes(file.Size)
+		title = file.Name
+		description = fileShareDescription(fileSize, file.ContentType, box.ExpiresAt)
+		ogImage = socialImageURL(r, box, file, view)
+		imageAlt = fmt.Sprintf("Download card for %s", file.Name)
+		imageType = socialImageType(file)
+	}
 	if locked && box.Obfuscate {
 		title = "Protected Warpbox link"
 		description = "This shared box is password protected."
 	}
 
+	pageURL := absoluteURL(r, fmt.Sprintf("/d/%s", box.ID))
+
+	// All user uploads are private/temporary — noindex by default.
+	robots := web.RobotsNone
+
 	a.renderPage(w, r, http.StatusOK, "download.html", web.PageData{
-		Title:       title,
+		Title:        title,
-		Description: description,
+		Description:  description,
-		ImageURL:    absoluteURL(r, fmt.Sprintf("/d/%s/og-image.jpg", box.ID)),
+		CanonicalURL: pageURL,
+		Robots:       robots,
+		ImageURL:     ogImage,
+		ImageAlt:     imageAlt,
+		ImageType:    imageType,
 		Data: downloadPageData{
 			Box:           boxView{ID: box.ID},
 			Files:         files,
@@ -97,8 +176,10 @@ func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
 			DownloadCount: box.DownloadCount,
 			MaxDownloads:  box.MaxDownloads,
 			ExpiresLabel:  expiresLabel,
+			EmojiTabs:     emojiTabs,
 		},
 	})
+	a.logger.Info("download page viewed", withRequestLogAttrs(r, "source", "download", "severity", "user_activity", "code", 2003, "box_id", box.ID, "locked", locked)...)
 }
 
 func plural(n int) string {
@@ -108,6 +189,43 @@ func plural(n int) string {
 	return "s"
 }
 
+func shouldServeRawSocialMedia(file services.File) bool {
+	return file.PreviewKind == "image" || file.PreviewKind == "video"
+}
+
+func fileShareDescription(size, contentType string, expiresAt time.Time) string {
+	if strings.TrimSpace(contentType) == "" {
+		contentType = "file"
+	}
+	return fmt.Sprintf("%s · %s · click to preview or download · expires %s", size, contentType, boxExpiryLabel(expiresAt, "Jan 2, 2006"))
+}
+
+func socialImageURL(r *http.Request, box services.Box, file services.File, view fileView) string {
+	if file.PreviewKind == "image" {
+		return absoluteURL(r, view.DownloadURL+"?inline=1")
+	}
+	if file.PreviewKind == "video" && view.HasThumbnail {
+		return absoluteURL(r, view.ThumbnailURL)
+	}
+	return absoluteURL(r, fmt.Sprintf("/d/%s/f/%s/og-image.jpg", box.ID, file.ID))
+}
+
+func socialImageType(file services.File) string {
+	if file.PreviewKind == "image" {
+		return file.ContentType
+	}
+	return "image/jpeg"
+}
+
+func socialOGType(file services.File) string {
+	switch file.PreviewKind {
+	case "video":
+		return "video.other"
+	default:
+		return "website"
+	}
+}
+
 func (a *App) DownloadFile(w http.ResponseWriter, r *http.Request) {
 	box, file, ok := a.loadFileForRequest(w, r)
 	if !ok {
@@ -115,20 +233,50 @@ func (a *App) DownloadFile(w http.ResponseWriter, r *http.Request) {
 	}
 
 	locked := a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box)
+	if isSocialPreviewBot(r) && !locked {
+		if file.Processing {
+			http.Error(w, "file is still processing", http.StatusAccepted)
+			return
+		}
+		if shouldServeRawSocialMedia(file) {
+			a.serveFileContent(w, r, box, file, false)
+			a.logger.Info("media file served inline for social preview", withRequestLogAttrs(r, "source", "download", "severity", "user_activity", "code", 2009, "box_id", box.ID, "file_id", file.ID)...)
+			return
+		}
+	}
 	view := a.fileView(box, file)
+	fileSize := helpers.FormatBytes(file.Size)
 	title := file.Name
-	description := fmt.Sprintf("%s shared via Warpbox", helpers.FormatBytes(file.Size))
+	description := fileShareDescription(fileSize, file.ContentType, box.ExpiresAt)
-	imageURL := absoluteURL(r, view.ThumbnailURL)
+	imageURL := socialImageURL(r, box, file, view)
+	imageAlt := fmt.Sprintf("Download card for %s", file.Name)
+	ogType := socialOGType(file)
+	mediaURL := ""
+	if file.PreviewKind == "video" {
+		mediaURL = absoluteURL(r, view.DownloadURL+"?inline=1")
+	}
 	if locked && box.Obfuscate {
 		title = "Protected Warpbox file"
 		description = "This shared file is password protected."
 		imageURL = absoluteURL(r, "/static/img/file-placeholder.webp")
+		imageAlt = "Password protected file on Warp Box"
+		ogType = "website"
+		mediaURL = ""
 	}
 
+	pageURL := absoluteURL(r, fmt.Sprintf("/d/%s/f/%s", box.ID, file.ID))
+
 	a.renderPage(w, r, http.StatusOK, "preview.html", web.PageData{
-		Title:       title,
+		Title:        title,
-		Description: description,
+		Description:  description,
-		ImageURL:    imageURL,
+		CanonicalURL: pageURL,
+		Robots:       web.RobotsNone,
+		OGType:       ogType,
+		ImageURL:     imageURL,
+		ImageAlt:     imageAlt,
+		ImageType:    socialImageType(file),
+		MediaURL:     mediaURL,
+		MediaType:    file.ContentType,
 		Data: previewPageData{
 			Box:         boxView{ID: box.ID},
 			File:        view,
@@ -136,22 +284,31 @@ func (a *App) DownloadFile(w http.ResponseWriter, r *http.Request) {
 			DownloadURL: view.DownloadURL,
 		},
 	})
+	a.logger.Info("file preview page viewed", withRequestLogAttrs(r, "source", "download", "severity", "user_activity", "code", 2004, "box_id", box.ID, "file_id", file.ID)...)
 }
 
 func (a *App) DownloadFileContent(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("X-Robots-Tag", "noindex, nofollow, noarchive")
 	box, file, ok := a.loadFileForRequest(w, r)
 	if !ok {
 		return
 	}
 	if a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box) {
+		a.logger.Warn("protected file download blocked", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4013, "box_id", box.ID, "file_id", file.ID)...)
 		http.Error(w, "password required", http.StatusUnauthorized)
 		return
 	}
+	if file.Processing {
+		http.Error(w, "file is still processing", http.StatusAccepted)
+		return
+	}
 
 	a.serveFileContent(w, r, box, file, r.URL.Query().Get("inline") != "1")
+	a.logger.Info("file content served", withRequestLogAttrs(r, "source", "download", "severity", "user_activity", "code", 2005, "box_id", box.ID, "file_id", file.ID, "attachment", r.URL.Query().Get("inline") != "1")...)
 }
 
 func (a *App) Thumbnail(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("X-Robots-Tag", "noindex, nofollow, noarchive")
 	box, file, ok := a.loadFileForRequest(w, r)
 	if !ok {
 		return
@@ -163,6 +320,17 @@ func (a *App) Thumbnail(w http.ResponseWriter, r *http.Request) {
 
 	object, err := a.uploadService.OpenThumbnailObject(r.Context(), box, file)
 	if err != nil {
+		if thumbnail := a.generateMissingThumbnailForRequest(r, box, file); thumbnail != "" {
+			file.Thumbnail = thumbnail
+			object, err = a.uploadService.OpenThumbnailObject(r.Context(), box, file)
+			if err == nil {
+				defer object.Body.Close()
+				w.Header().Set("Content-Type", "image/jpeg")
+				w.Header().Set("Cache-Control", "public, max-age=604800, immutable")
+				http.ServeContent(w, r, file.ID+"-thumbnail.jpg", object.ModTime, readSeekCloser(object.Body))
+				return
+			}
+		}
 		// The thumbnail isn't generated yet (background job pending). Serve the
 		// placeholder but mark it non-cacheable, otherwise the browser would
 		// keep showing the placeholder until a hard refresh once the real
@@ -177,6 +345,30 @@ func (a *App) Thumbnail(w http.ResponseWriter, r *http.Request) {
 	http.ServeContent(w, r, file.ID+"-thumbnail.jpg", object.ModTime, readSeekCloser(object.Body))
 }
 
+func (a *App) generateMissingThumbnailForRequest(r *http.Request, box services.Box, file services.File) string {
+	if file.Thumbnail != "" || !jobs.NeedsThumbnail(file) {
+		return ""
+	}
+	thumbnail, err := jobs.GenerateThumbnailForFile(a.uploadService, box, file)
+	if err != nil || thumbnail == "" {
+		if err != nil {
+			a.logger.Warn("on-demand thumbnail generation failed", withRequestLogAttrs(r, "source", "thumbnail", "severity", "warn", "code", 4102, "box_id", box.ID, "file_id", file.ID, "error", err.Error())...)
+		}
+		return ""
+	}
+	for i := range box.Files {
+		if box.Files[i].ID == file.ID {
+			box.Files[i].Thumbnail = thumbnail
+			break
+		}
+	}
+	if err := a.uploadService.SaveBox(box); err != nil {
+		a.logger.Warn("on-demand thumbnail metadata save failed", withRequestLogAttrs(r, "source", "thumbnail", "severity", "warn", "code", 4103, "box_id", box.ID, "file_id", file.ID, "error", err.Error())...)
+		return ""
+	}
+	return thumbnail
+}
+
 // servePlaceholderThumbnail serves the fallback image with no-store so the
 // browser re-requests on the next load and picks up the real thumbnail as soon
 // as it has been generated.
@@ -196,7 +388,7 @@ func (a *App) UnlockBox(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if !a.uploadService.VerifyPassword(box, r.FormValue("password")) {
-		a.logger.Warn("box unlock failed", "source", "user_activity", "severity", "warn", "code", 4011, "box_id", box.ID)
+		a.logger.Warn("box unlock failed", withRequestLogAttrs(r, "source", "user_activity", "severity", "warn", "code", 4011, "box_id", box.ID)...)
 		http.Redirect(w, r, fmt.Sprintf("/d/%s", box.ID), http.StatusSeeOther)
 		return
 	}
@@ -209,23 +401,26 @@ func (a *App) UnlockBox(w http.ResponseWriter, r *http.Request) {
 		Secure:   r.TLS != nil,
 		Expires:  box.ExpiresAt,
 	})
-	a.logger.Info("box unlocked", "source", "user_activity", "severity", "user_activity", "code", 2002, "box_id", box.ID)
+	a.logger.Info("box unlocked", withRequestLogAttrs(r, "source", "user_activity", "severity", "user_activity", "code", 2002, "box_id", box.ID)...)
 	http.Redirect(w, r, fmt.Sprintf("/d/%s", box.ID), http.StatusSeeOther)
 }
 
 func (a *App) loadFileForRequest(w http.ResponseWriter, r *http.Request) (services.Box, services.File, bool) {
 	box, err := a.uploadService.GetBox(r.PathValue("boxID"))
 	if err != nil {
+		a.logger.Warn("file request missing box", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4041, "box_id", r.PathValue("boxID"), "file_id", r.PathValue("fileID"))...)
 		http.NotFound(w, r)
 		return services.Box{}, services.File{}, false
 	}
 	if err := a.uploadService.CanDownload(box); err != nil {
+		a.logger.Warn("file request unavailable", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", statusForDownloadError(err), "box_id", box.ID, "file_id", r.PathValue("fileID"), "error", err.Error())...)
 		http.Error(w, err.Error(), statusForDownloadError(err))
 		return services.Box{}, services.File{}, false
 	}
 
 	file, err := a.uploadService.FindFile(box, r.PathValue("fileID"))
 	if err != nil {
+		a.logger.Warn("file request missing file", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4042, "box_id", box.ID, "file_id", r.PathValue("fileID"))...)
 		http.NotFound(w, r)
 		return services.Box{}, services.File{}, false
 	}
@@ -235,6 +430,7 @@ func (a *App) loadFileForRequest(w http.ResponseWriter, r *http.Request) (servic
 func (a *App) serveFileContent(w http.ResponseWriter, r *http.Request, box services.Box, file services.File, attachment bool) {
 	object, err := a.uploadService.OpenFileObject(r.Context(), box, file)
 	if err != nil {
+		a.logger.Warn("file object missing", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4043, "box_id", box.ID, "file_id", file.ID, "error", err.Error())...)
 		http.NotFound(w, r)
 		return
 	}
@@ -268,16 +464,20 @@ func readSeekCloser(source io.ReadCloser) io.ReadSeeker {
 }
 
 func (a *App) DownloadZip(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("X-Robots-Tag", "noindex, nofollow, noarchive")
 	box, err := a.uploadService.GetBox(r.PathValue("boxID"))
 	if err != nil {
+		a.logger.Warn("zip request missing box", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4044, "box_id", r.PathValue("boxID"))...)
 		http.NotFound(w, r)
 		return
 	}
 	if err := a.uploadService.CanDownload(box); err != nil {
+		a.logger.Warn("zip request unavailable", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", statusForDownloadError(err), "box_id", box.ID, "error", err.Error())...)
 		http.Error(w, err.Error(), statusForDownloadError(err))
 		return
 	}
 	if a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box) {
+		a.logger.Warn("protected zip download blocked", withRequestLogAttrs(r, "source", "download", "severity", "warn", "code", 4014, "box_id", box.ID)...)
 		http.Error(w, "password required", http.StatusUnauthorized)
 		return
 	}
@@ -293,21 +493,204 @@ func (a *App) DownloadZip(w http.ResponseWriter, r *http.Request) {
 	if err := a.uploadService.RecordDownload(box.ID); err != nil && !errors.Is(err, os.ErrNotExist) {
 		a.logger.Warn("failed to record zip download", "source", "download", "severity", "warn", "code", 4003, "box_id", box.ID, "error", err.Error())
 	}
+	a.logger.Info("zip downloaded", withRequestLogAttrs(r, "source", "download", "severity", "user_activity", "code", 2006, "box_id", box.ID, "files", len(box.Files))...)
 }
 
 func (a *App) fileView(box services.Box, file services.File) fileView {
+	return a.fileViewWithReactions(box, file, nil, false)
+}
+
+func (a *App) fileViewWithReactions(box services.Box, file services.File, reactions []services.ReactionSummary, reacted bool) fileView {
+	icon := a.fileIcons.lookup(file.Name, file.ContentType)
+	reactionViews := a.reactionViews(reactions)
 	return fileView{
 		ID:           file.ID,
 		Name:         file.Name,
 		Size:         helpers.FormatBytes(file.Size),
+		SizeBytes:    file.Size,
 		ContentType:  file.ContentType,
 		PreviewKind:  file.PreviewKind,
 		URL:          fmt.Sprintf("/d/%s/f/%s", box.ID, file.ID),
 		DownloadURL:  fmt.Sprintf("/d/%s/f/%s/download", box.ID, file.ID),
 		ThumbnailURL: fmt.Sprintf("/d/%s/thumb/%s", box.ID, file.ID),
+		HasThumbnail: file.Thumbnail != "" || jobs.NeedsThumbnail(file),
+		IconURL:      fileIconURL("standard", icon.Standard),
+		IconRetroURL: fileIconURL("retro", icon.Retro),
+		ReactURL:     fmt.Sprintf("/d/%s/f/%s/react", box.ID, file.ID),
+		Reactions:    reactionViews,
+		ReactionMore: reactionOverflowCount(reactionViews),
+		Reacted:      reacted,
+		Processing:   file.Processing,
 	}
 }
 
+func (a *App) ReactToFile(w http.ResponseWriter, r *http.Request) {
+	box, file, ok := a.loadFileForRequest(w, r)
+	if !ok {
+		return
+	}
+	if a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box) {
+		http.Error(w, "password required", http.StatusUnauthorized)
+		return
+	}
+
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "invalid reaction", http.StatusBadRequest)
+		return
+	}
+	emojiID := strings.TrimSpace(r.FormValue("emoji_id"))
+	if !a.validEmojiID(emojiID) {
+		http.Error(w, "unknown emoji", http.StatusBadRequest)
+		return
+	}
+
+	visitorID := a.reactionVisitorID(w, r)
+	reactions, err := a.reactionService.Add(box.ID, file.ID, visitorID, emojiID)
+	if errors.Is(err, os.ErrExist) {
+		writeJSON(w, http.StatusConflict, map[string]any{"error": "already reacted"})
+		return
+	}
+	if err != nil {
+		a.logger.Warn("file reaction failed", withRequestLogAttrs(r, "source", "reactions", "severity", "warn", "code", 4302, "box_id", box.ID, "file_id", file.ID, "error", err.Error())...)
+		http.Error(w, "could not save reaction", http.StatusInternalServerError)
+		return
+	}
+
+	a.logger.Info("file reaction added", withRequestLogAttrs(r, "source", "reactions", "severity", "user_activity", "code", 2301, "box_id", box.ID, "file_id", file.ID, "emoji_id", emojiID)...)
+	writeJSON(w, http.StatusCreated, map[string]any{
+		"reactions": a.reactionViews(reactions),
+		"reacted":   true,
+	})
+}
+
+func (a *App) reactionViews(reactions []services.ReactionSummary) []reactionView {
+	views := make([]reactionView, 0, len(reactions))
+	for index, reaction := range reactions {
+		views = append(views, reactionView{
+			EmojiID: reaction.EmojiID,
+			URL:     emojiURL(reaction.EmojiID),
+			Label:   emojiLabel(reaction.EmojiID),
+			Count:   reaction.Count,
+			Visible: index < 2,
+		})
+	}
+	return views
+}
+
+func reactionOverflowCount(reactions []reactionView) int {
+	if len(reactions) <= 2 {
+		return 0
+	}
+	return len(reactions) - 2
+}
+
+func (a *App) emojiTabs() ([]emojiTabView, error) {
+	root := a.emojiRoot()
+	entries, err := os.ReadDir(root)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	tabs := make([]emojiTabView, 0, len(entries))
+	for _, entry := range entries {
+		if !entry.IsDir() {
+			continue
+		}
+		tabID := entry.Name()
+		files, err := os.ReadDir(filepath.Join(root, tabID))
+		if err != nil {
+			return nil, err
+		}
+		tab := emojiTabView{ID: tabID, Label: emojiTabLabel(tabID)}
+		for _, file := range files {
+			if file.IsDir() || !isEmojiFile(file.Name()) {
+				continue
+			}
+			emojiID := tabID + "/" + file.Name()
+			tab.Emojis = append(tab.Emojis, emojiOptionView{
+				ID:    emojiID,
+				URL:   emojiURL(emojiID),
+				Label: emojiLabel(emojiID),
+			})
+		}
+		sort.Slice(tab.Emojis, func(i, j int) bool { return tab.Emojis[i].ID < tab.Emojis[j].ID })
+		if len(tab.Emojis) > 0 {
+			tabs = append(tabs, tab)
+		}
+	}
+	sort.Slice(tabs, func(i, j int) bool { return tabs[i].ID < tabs[j].ID })
+	return tabs, nil
+}
+
+func (a *App) validEmojiID(id string) bool {
+	id = strings.TrimSpace(id)
+	if id == "" || strings.Contains(id, "\\") || strings.Contains(id, "..") || strings.HasPrefix(id, "/") {
+		return false
+	}
+	parts := strings.Split(id, "/")
+	if len(parts) != 2 || parts[0] == "" || parts[1] == "" || !isEmojiFile(parts[1]) {
+		return false
+	}
+	info, err := os.Stat(filepath.Join(a.emojiRoot(), parts[0], parts[1]))
+	return err == nil && !info.IsDir()
+}
+
+func (a *App) emojiRoot() string {
+	return filepath.Join(a.cfg.DataDir, "emoji")
+}
+
+func (a *App) reactionVisitorID(w http.ResponseWriter, r *http.Request) string {
+	const cookieName = "warpbox_reactor"
+	if cookie, err := r.Cookie(cookieName); err == nil && strings.TrimSpace(cookie.Value) != "" {
+		return cookie.Value
+	}
+	visitorID := services.RandomPublicToken(32)
+	http.SetCookie(w, &http.Cookie{
+		Name:     cookieName,
+		Value:    visitorID,
+		Path:     "/",
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		Secure:   r.TLS != nil,
+		Expires:  time.Now().AddDate(1, 0, 0),
+	})
+	return visitorID
+}
+
+func isEmojiFile(name string) bool {
+	ext := strings.ToLower(filepath.Ext(name))
+	return ext == ".svg" || ext == ".webp" || ext == ".png" || ext == ".jpg" || ext == ".jpeg" || ext == ".gif"
+}
+
+func emojiTabLabel(id string) string {
+	label := strings.NewReplacer("-", " ", "_", " ").Replace(id)
+	if label == "" {
+		return "Emoji"
+	}
+	return strings.ToUpper(label[:1]) + label[1:]
+}
+
+func emojiLabel(id string) string {
+	base := strings.TrimSuffix(filepath.Base(id), filepath.Ext(id))
+	return strings.ReplaceAll(base, "-", " ")
+}
+
+func emojiURL(id string) string {
+	parts := strings.Split(id, "/")
+	if len(parts) != 2 {
+		return ""
+	}
+	return "/emoji/" + url.PathEscape(parts[0]) + "/" + url.PathEscape(parts[1])
+}
+
+func writeJSON(w http.ResponseWriter, status int, value any) {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(value)
+}
+
 func (a *App) isBoxUnlocked(r *http.Request, box services.Box) bool {
 	if !a.uploadService.IsProtected(box) {
 		return true
@@ -323,6 +706,21 @@ func unlockCookieName(boxID string) string {
 	return "warpbox_unlock_" + strings.NewReplacer("-", "_", ".", "_").Replace(boxID)
 }
 
+// neverExpires reports whether a box's expiry is far enough out to be treated as
+// "forever" (set via the unlimited / -1 expiry option).
+func neverExpires(t time.Time) bool {
+	return time.Until(t) > 50*365*24*time.Hour
+}
+
+// boxExpiryLabel formats a box's expiry with the given layout, rendering
+// "forever" boxes as "Never" instead of a meaningless far-future date.
+func boxExpiryLabel(t time.Time, layout string) string {
+	if neverExpires(t) {
+		return "Never"
+	}
+	return t.Format(layout)
+}
+
 func absoluteURL(r *http.Request, path string) string {
 	if strings.HasPrefix(path, "http://") || strings.HasPrefix(path, "https://") {
 		return path
@@ -333,3 +731,31 @@ func absoluteURL(r *http.Request, path string) string {
 	}
 	return fmt.Sprintf("%s://%s%s", scheme, r.Host, path)
 }
+
+func isSocialPreviewBot(r *http.Request) bool {
+	agent := strings.ToLower(r.UserAgent())
+	if agent == "" {
+		return false
+	}
+	bots := []string{
+		"discordbot",
+		"twitterbot",
+		"facebookexternalhit",
+		"telegrambot",
+		"whatsapp",
+		"slackbot",
+		"linkedinbot",
+		"skypeuripreview",
+		"embedly",
+		"pinterest",
+		"vkshare",
+		"mattermost",
+		"mastodon",
+	}
+	for _, bot := range bots {
+		if strings.Contains(agent, bot) {
+			return true
+		}
+	}
+	return false
+}

backend/libs/handlers/health.go

@@ -13,6 +13,10 @@ type healthResponse struct {
 }
 
 func (a *App) Health(w http.ResponseWriter, r *http.Request) {
+	if r.URL.Path != "/health" {
+		http.NotFound(w, r)
+		return
+	}
 	helpers.WriteJSON(w, http.StatusOK, healthResponse{
 		Status: "ok",
 		Time:   time.Now().UTC().Format(time.RFC3339),

backend/libs/handlers/health_test.go

@@ -13,16 +13,20 @@ func TestHealthRoutes(t *testing.T) {
 	mux := http.NewServeMux()
 	app.RegisterRoutes(mux)
 
-	for _, path := range []string{"/health", "/healthz", "/api/v1/health"} {
+	request := httptest.NewRequest(http.MethodGet, "/health", nil)
-		t.Run(path, func(t *testing.T) {
+	response := httptest.NewRecorder()
-			request := httptest.NewRequest(http.MethodGet, path, nil)
-			response := httptest.NewRecorder()
 
-			mux.ServeHTTP(response, request)
+	mux.ServeHTTP(response, request)
 
-			if response.Code != http.StatusOK {
+	if response.Code != http.StatusOK {
-				t.Fatalf("status = %d, body = %s", response.Code, response.Body.String())
+		t.Fatalf("status = %d, body = %s", response.Code, response.Body.String())
-			}
+	}
-		})
+	for _, path := range []string{"/healthz", "/api/v1/health"} {
+		request := httptest.NewRequest(http.MethodGet, path, nil)
+		response := httptest.NewRecorder()
+		mux.ServeHTTP(response, request)
+		if response.Code != http.StatusNotFound {
+			t.Fatalf("%s status = %d, want 404", path, response.Code)
+		}
 	}
 }

backend/libs/handlers/icons.go

@@ -0,0 +1,152 @@
+package handlers
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// fileIcon holds the two icon filenames for a file type: the standard (modern)
+// icon and the retro (Win98) icon. The filenames are resolved against
+// static/file-icons/standard and static/file-icons/retro respectively.
+type fileIcon struct {
+	Standard string `json:"standard"`
+	Retro    string `json:"retro"`
+}
+
+type iconType struct {
+	Mime       string   `json:"mime"`
+	Standard   string   `json:"standard"`
+	Retro      string   `json:"retro"`
+	Extensions []string `json:"extensions"`
+}
+
+type iconMapFile struct {
+	Default iconType   `json:"default"`
+	Types   []iconType `json:"types"`
+}
+
+type mimeRule struct {
+	pattern string // exact mime ("application/pdf") or major prefix ("image/")
+	prefix  bool
+	icon    fileIcon
+}
+
+// fileIconSet is the loaded icon map: an extension lookup plus content-type
+// rules and a fallback. It is built once at startup from icon-map.json.
+type fileIconSet struct {
+	byExt    map[string]fileIcon
+	byMime   []mimeRule
+	fallback fileIcon
+}
+
+// loadFileIcons reads static/file-icons/icon-map.json and indexes it by
+// extension and content type so icons can be assigned at render time.
+func loadFileIcons(staticDir string) (*fileIconSet, error) {
+	data, err := os.ReadFile(filepath.Join(staticDir, "file-icons", "icon-map.json"))
+	if err != nil {
+		return nil, err
+	}
+	var raw iconMapFile
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return nil, err
+	}
+
+	set := &fileIconSet{
+		byExt:    make(map[string]fileIcon),
+		fallback: fileIcon{Standard: raw.Default.Standard, Retro: raw.Default.Retro},
+	}
+	if err := validateFileIcon(staticDir, set.fallback); err != nil {
+		return nil, err
+	}
+	for _, t := range raw.Types {
+		icon := fileIcon{Standard: t.Standard, Retro: t.Retro}
+		if err := validateFileIcon(staticDir, icon); err != nil {
+			return nil, err
+		}
+		for _, ext := range t.Extensions {
+			set.byExt[strings.ToLower(strings.TrimPrefix(ext, "."))] = icon
+		}
+		if t.Mime == "" {
+			continue
+		}
+		if strings.HasSuffix(t.Mime, "/*") {
+			set.byMime = append(set.byMime, mimeRule{pattern: strings.TrimSuffix(t.Mime, "*"), prefix: true, icon: icon})
+		} else {
+			set.byMime = append(set.byMime, mimeRule{pattern: strings.ToLower(t.Mime), icon: icon})
+		}
+	}
+	return set, nil
+}
+
+func validateFileIcon(staticDir string, icon fileIcon) error {
+	if icon.Standard != "" {
+		if err := validateFileIconPath(staticDir, "standard", icon.Standard); err != nil {
+			return err
+		}
+	}
+	if icon.Retro != "" {
+		if err := validateFileIconPath(staticDir, "retro", icon.Retro); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func validateFileIconPath(staticDir, theme, name string) error {
+	if strings.Contains(name, "/") || strings.Contains(name, "\\") || strings.Contains(name, "..") {
+		return fmt.Errorf("invalid %s file icon path %q", theme, name)
+	}
+	path := filepath.Join(staticDir, "file-icons", theme, name)
+	info, err := os.Stat(path)
+	if err != nil {
+		return fmt.Errorf("missing %s file icon %q: %w", theme, name, err)
+	}
+	if info.IsDir() {
+		return fmt.Errorf("%s file icon %q is a directory", theme, name)
+	}
+	return nil
+}
+
+// lookup resolves a file's icon from its name (extension) first, falling back to
+// its content type, then to the default icon. Extension wins because stored
+// content types are often the generic application/octet-stream.
+func (s *fileIconSet) lookup(name, contentType string) fileIcon {
+	if s == nil {
+		return fileIcon{}
+	}
+	if ext := strings.ToLower(strings.TrimPrefix(filepath.Ext(name), ".")); ext != "" {
+		if icon, ok := s.byExt[ext]; ok {
+			return icon
+		}
+	}
+
+	ct := strings.ToLower(strings.TrimSpace(contentType))
+	if i := strings.IndexByte(ct, ';'); i >= 0 {
+		ct = strings.TrimSpace(ct[:i])
+	}
+	if ct != "" && ct != "application/octet-stream" {
+		for _, rule := range s.byMime { // exact matches first
+			if !rule.prefix && rule.pattern == ct {
+				return rule.icon
+			}
+		}
+		for _, rule := range s.byMime { // then major-type prefixes
+			if rule.prefix && strings.HasPrefix(ct, rule.pattern) {
+				return rule.icon
+			}
+		}
+	}
+	return s.fallback
+}
+
+// fileIconURL builds the /static URL for an icon filename in the given theme
+// directory ("standard" or "retro").
+func fileIconURL(theme, name string) string {
+	if name == "" {
+		return ""
+	}
+	return "/static/file-icons/" + theme + "/" + name
+}

backend/libs/handlers/icons_test.go

@@ -0,0 +1,54 @@
+package handlers
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+func TestFileIconMapLoadsAndResolvesCommonTypes(t *testing.T) {
+	icons, err := loadFileIcons(filepath.Join("..", "..", "static"))
+	if err != nil {
+		t.Fatalf("loadFileIcons returned error: %v", err)
+	}
+
+	tests := []struct {
+		name         string
+		contentType  string
+		wantStandard string
+		wantRetro    string
+	}{
+		{
+			name:         "photo.jpg",
+			contentType:  "application/octet-stream",
+			wantStandard: "image-document-svgrepo-com.svg",
+			wantRetro:    "shimgvw.dll_14_1-2.png",
+		},
+		{
+			name:         "movie.mkv",
+			contentType:  "",
+			wantStandard: "video-document-svgrepo-com.svg",
+			wantRetro:    "wmploc.dll_14_504-2.png",
+		},
+		{
+			name:         "archive.7z",
+			contentType:  "",
+			wantStandard: "zip-document-svgrepo-com.svg",
+			wantRetro:    "zipfldr.dll_14_101-2.png",
+		},
+		{
+			name:         "unknown.bin",
+			contentType:  "application/octet-stream",
+			wantStandard: "txt-document-svgrepo-com.svg",
+			wantRetro:    "shell32.dll_14_152-2.png",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := icons.lookup(tt.name, tt.contentType)
+			if got.Standard != tt.wantStandard || got.Retro != tt.wantRetro {
+				t.Fatalf("lookup returned %+v, want standard=%q retro=%q", got, tt.wantStandard, tt.wantRetro)
+			}
+		})
+	}
+}

backend/libs/handlers/logging.go

@@ -0,0 +1,29 @@
+package handlers
+
+import (
+	"net/http"
+
+	"warpbox.dev/backend/libs/middleware"
+)
+
+func requestLogAttrs(r *http.Request) []any {
+	attrs := []any{
+		"ip", uploadClientIP(r),
+		"method", r.Method,
+		"path", r.URL.Path,
+	}
+	if requestID := middleware.RequestIDFromContext(r.Context()); requestID != "" {
+		attrs = append(attrs, "request_id", requestID)
+	}
+	if userAgent := r.UserAgent(); userAgent != "" {
+		attrs = append(attrs, "user_agent", userAgent)
+	}
+	return attrs
+}
+
+func withRequestLogAttrs(r *http.Request, attrs ...any) []any {
+	out := make([]any, 0, len(attrs)+8)
+	out = append(out, attrs...)
+	out = append(out, requestLogAttrs(r)...)
+	return out
+}

backend/libs/handlers/manage.go

@@ -31,6 +31,7 @@ func (a *App) ManageBox(w http.ResponseWriter, r *http.Request) {
 		Description: "Delete this anonymous Warpbox upload.",
 		Data:        a.managePageData(box, r.PathValue("token")),
 	})
+	a.logger.Info("anonymous manage page viewed", withRequestLogAttrs(r, "source", "anonymous-delete", "severity", "user_activity", "code", 2102, "box_id", box.ID)...)
 }
 
 func (a *App) ManageDeleteBox(w http.ResponseWriter, r *http.Request) {
@@ -40,10 +41,11 @@ func (a *App) ManageDeleteBox(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := a.uploadService.DeleteBoxWithToken(box.ID, r.PathValue("token")); err != nil {
-		a.logger.Warn("anonymous delete failed", "source", "anonymous-delete", "severity", "warn", "code", 4102, "box_id", box.ID, "error", err.Error())
+		a.logger.Warn("anonymous delete failed", withRequestLogAttrs(r, "source", "anonymous-delete", "severity", "warn", "code", 4102, "box_id", box.ID, "error", err.Error())...)
 		http.NotFound(w, r)
 		return
 	}
+	a.logger.Info("anonymous box deleted", withRequestLogAttrs(r, "source", "anonymous-delete", "severity", "user_activity", "code", 2103, "box_id", box.ID)...)
 	http.Redirect(w, r, "/d/"+box.ID+"/deleted", http.StatusSeeOther)
 }
 
@@ -58,10 +60,12 @@ func (a *App) ManageDeleted(w http.ResponseWriter, r *http.Request) {
 func (a *App) loadManagedBox(w http.ResponseWriter, r *http.Request) (services.Box, bool) {
 	box, err := a.uploadService.GetBox(r.PathValue("boxID"))
 	if err != nil {
+		a.logger.Warn("anonymous manage missing box", withRequestLogAttrs(r, "source", "anonymous-delete", "severity", "warn", "code", 4103, "box_id", r.PathValue("boxID"))...)
 		http.NotFound(w, r)
 		return services.Box{}, false
 	}
 	if !a.uploadService.VerifyDeleteToken(box, r.PathValue("token")) {
+		a.logger.Warn("anonymous manage invalid token", withRequestLogAttrs(r, "source", "anonymous-delete", "severity", "warn", "code", 4104, "box_id", box.ID)...)
 		http.NotFound(w, r)
 		return services.Box{}, false
 	}
@@ -78,7 +82,7 @@ func (a *App) managePageData(box services.Box, token string) managePageData {
 		Token:           token,
 		FileCount:       len(box.Files),
 		TotalSize:       helpers.FormatBytes(totalSize),
-		ExpiresLabel:    box.ExpiresAt.Format("Jan 2, 2006 15:04 MST"),
+		ExpiresLabel:    boxExpiryLabel(box.ExpiresAt, "Jan 2, 2006 15:04 MST"),
 		DownloadCount:   box.DownloadCount,
 		MaxDownloads:    box.MaxDownloads,
 		Protected:       a.uploadService.IsProtected(box),

backend/libs/handlers/meta.go

@@ -0,0 +1,58 @@
+package handlers
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+// RobotsTxt serves /robots.txt dynamically so the Sitemap URL reflects the
+// configured base URL rather than a hard-coded placeholder.
+func (a *App) RobotsTxt(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	w.Header().Set("Cache-Control", "public, max-age=86400")
+	fmt.Fprintf(w, `User-agent: *
+Allow: /
+
+# Private routes — do not crawl
+Disallow: /admin/
+Disallow: /api/
+Disallow: /app/
+Disallow: /account/
+Disallow: /d/*/f/*/download
+Disallow: /d/*/zip
+Disallow: /d/*/thumb/
+Disallow: /d/*/og-image.jpg
+Disallow: /d/*/unlock
+Disallow: /d/*/manage/
+
+Sitemap: %s/sitemap.xml
+`, strings.TrimRight(siteBaseURL(r, a.cfg.BaseURL), "/"))
+}
+
+// SitemapXML serves a minimal /sitemap.xml containing only the public,
+// indexable homepage. Box/file pages are noindex and deliberately excluded.
+func (a *App) SitemapXML(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/xml; charset=utf-8")
+	w.Header().Set("Cache-Control", "public, max-age=3600")
+	baseURL := strings.TrimRight(siteBaseURL(r, a.cfg.BaseURL), "/")
+	lastMod := time.Now().UTC().Format("2006-01-02")
+	fmt.Fprintf(w, `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>%s/</loc>
+    <lastmod>%s</lastmod>
+    <changefreq>weekly</changefreq>
+    <priority>1.0</priority>
+  </url>
+</urlset>
+`, baseURL, lastMod)
+}
+
+func siteBaseURL(r *http.Request, configured string) string {
+	if configured != "" {
+		return configured
+	}
+	return absoluteURL(r, "/")
+}

backend/libs/handlers/ogimage.go

@@ -2,6 +2,7 @@ package handlers
 
 import (
 	"bytes"
+	"fmt"
 	"image"
 	"image/color"
 	"image/draw"
@@ -11,10 +12,18 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 
+	"golang.org/x/image/font"
+	"golang.org/x/image/font/basicfont"
+	"golang.org/x/image/font/opentype"
+	"golang.org/x/image/math/fixed"
 	xdraw "golang.org/x/image/draw"
 	_ "golang.org/x/image/webp"
+
+	"warpbox.dev/backend/libs/helpers"
+	"warpbox.dev/backend/libs/services"
 )
 
 // Open Graph image dimensions recommended for large summary cards
@@ -74,6 +83,22 @@ func (a *App) BoxOGImage(w http.ResponseWriter, r *http.Request) {
 	a.serveOGImage(w, r, renderCollage(thumbs))
 }
 
+// FileOGImage renders a branded card for files that should not be served as raw
+// media to social preview bots: text, Markdown, HTML, PDF, audio, archives, etc.
+func (a *App) FileOGImage(w http.ResponseWriter, r *http.Request) {
+	box, file, ok := a.loadFileForRequest(w, r)
+	if !ok {
+		return
+	}
+	if a.uploadService.IsProtected(box) && box.Obfuscate && !a.isBoxUnlocked(r, box) {
+		a.serveOGImage(w, r, a.ogPlaceholder())
+		return
+	}
+
+	icon := a.ogFileIcon(file)
+	a.serveOGImage(w, r, a.renderFileCard(file, icon))
+}
+
 func (a *App) serveOGImage(w http.ResponseWriter, r *http.Request, img image.Image) {
 	var buf bytes.Buffer
 	if err := jpeg.Encode(&buf, img, &jpeg.Options{Quality: 85}); err != nil {
@@ -115,6 +140,158 @@ func (a *App) ogPlaceholder() image.Image {
 	return canvas
 }
 
+func (a *App) ogFileIcon(file services.File) image.Image {
+	if a.fileIcons == nil {
+		return nil
+	}
+	icon := a.fileIcons.lookup(file.Name, file.ContentType)
+	if icon.Retro == "" {
+		return nil
+	}
+	path := filepath.Join(a.cfg.StaticDir, "file-icons", "retro", icon.Retro)
+	f, err := os.Open(path)
+	if err != nil {
+		return nil
+	}
+	defer f.Close()
+	img, _, err := image.Decode(f)
+	if err != nil {
+		return nil
+	}
+	return img
+}
+
+func (a *App) renderFileCard(file services.File, icon image.Image) image.Image {
+	canvas := image.NewRGBA(image.Rect(0, 0, ogImageWidth, ogImageHeight))
+	draw.Draw(canvas, canvas.Bounds(), &image.Uniform{ogBackground}, image.Point{}, draw.Src)
+
+	panel := image.Rect(70, 72, ogImageWidth-70, ogImageHeight-72)
+	draw.Draw(canvas, panel, &image.Uniform{color.RGBA{R: 0x17, G: 0x14, B: 0x2d, A: 0xff}}, image.Point{}, draw.Src)
+	draw.Draw(canvas, image.Rect(panel.Min.X, panel.Min.Y, panel.Max.X, panel.Min.Y+6), &image.Uniform{color.RGBA{R: 0xa7, G: 0x8b, B: 0xfa, A: 0xff}}, image.Point{}, draw.Src)
+
+	titleFace := a.ogFont(44, true)
+	bodyFace := a.ogFont(28, false)
+	metaFace := a.ogFont(24, false)
+	buttonFace := a.ogFont(26, true)
+
+	if icon != nil {
+		xdraw.NearestNeighbor.Scale(canvas, image.Rect(110, 142, 230, 262), icon, icon.Bounds(), xdraw.Over, nil)
+	} else {
+		draw.Draw(canvas, image.Rect(110, 142, 230, 262), &image.Uniform{color.RGBA{R: 0x21, G: 0x1b, B: 0x3e, A: 0xff}}, image.Point{}, draw.Src)
+	}
+
+	titleLines := wrapOGText(file.Name, titleFace, 850)
+	if len(titleLines) > 2 {
+		titleLines = titleLines[:2]
+		titleLines[1] = trimOGText(titleLines[1], titleFace, 850)
+	}
+	y := 156
+	for _, line := range titleLines {
+		drawOGText(canvas, titleFace, line, 265, y, color.RGBA{R: 0xf5, G: 0xf3, B: 0xff, A: 0xff})
+		y += 52
+	}
+
+	size := helpers.FormatBytes(file.Size)
+	typeLabel := strings.TrimSpace(file.ContentType)
+	if typeLabel == "" {
+		typeLabel = "application/octet-stream"
+	}
+	drawOGText(canvas, bodyFace, fmt.Sprintf("%s · %s", size, typeLabel), 265, y+12, color.RGBA{R: 0xaa, G: 0xa4, B: 0xd6, A: 0xff})
+
+	info := fileCardInfo(file)
+	for i, line := range wrapOGText(info, metaFace, 900) {
+		if i >= 2 {
+			break
+		}
+		drawOGText(canvas, metaFace, line, 110, 355+i*34, color.RGBA{R: 0xd8, G: 0xd2, B: 0xff, A: 0xff})
+	}
+
+	button := image.Rect(110, 474, 430, 548)
+	draw.Draw(canvas, button, &image.Uniform{color.RGBA{R: 0x8b, G: 0x5c, B: 0xf6, A: 0xff}}, image.Point{}, draw.Src)
+	drawOGText(canvas, buttonFace, "Click to download", 142, 520, color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
+	drawOGText(canvas, metaFace, "warpbox.dev", 910, 520, color.RGBA{R: 0xaa, G: 0xa4, B: 0xd6, A: 0xff})
+	return canvas
+}
+
+func fileCardInfo(file services.File) string {
+	switch {
+	case strings.HasPrefix(file.ContentType, "audio/"):
+		return "Audio file shared through Warpbox. Open the link to preview in your browser or download the original."
+	case file.ContentType == "text/markdown":
+		return "Markdown file shared through Warpbox. Open the link to view the rendered preview, source, or download."
+	case strings.Contains(file.ContentType, "html"):
+		return "HTML file shared through Warpbox. Open the link to preview rendered HTML, source, or download."
+	case strings.Contains(file.ContentType, "pdf"):
+		return "PDF file shared through Warpbox. Open the link to download the original file."
+	case strings.HasPrefix(file.ContentType, "text/"):
+		return "Text file shared through Warpbox. Open the link to preview the content or download."
+	default:
+		return "File shared through Warpbox. Open the link to preview available details or download the original."
+	}
+}
+
+func (a *App) ogFont(size float64, bold bool) font.Face {
+	name := "PixeloidSans.ttf"
+	if bold {
+		name = "PixeloidSans-Bold.ttf"
+	}
+	data, err := os.ReadFile(filepath.Join(a.cfg.StaticDir, "fonts", "pixeloid_sans", name))
+	if err != nil {
+		return basicfont.Face7x13
+	}
+	parsed, err := opentype.Parse(data)
+	if err != nil {
+		return basicfont.Face7x13
+	}
+	face, err := opentype.NewFace(parsed, &opentype.FaceOptions{Size: size, DPI: 72, Hinting: font.HintingFull})
+	if err != nil {
+		return basicfont.Face7x13
+	}
+	return face
+}
+
+func drawOGText(dst *image.RGBA, face font.Face, text string, x, y int, c color.Color) {
+	d := font.Drawer{
+		Dst:  dst,
+		Src:  image.NewUniform(c),
+		Face: face,
+		Dot:  fixed.P(x, y),
+	}
+	d.DrawString(text)
+}
+
+func wrapOGText(text string, face font.Face, maxWidth int) []string {
+	words := strings.Fields(text)
+	if len(words) == 0 {
+		return []string{text}
+	}
+	lines := []string{}
+	current := words[0]
+	for _, word := range words[1:] {
+		next := current + " " + word
+		if ogTextWidth(face, next) <= maxWidth {
+			current = next
+			continue
+		}
+		lines = append(lines, current)
+		current = word
+	}
+	lines = append(lines, current)
+	return lines
+}
+
+func trimOGText(text string, face font.Face, maxWidth int) string {
+	for ogTextWidth(face, text+"...") > maxWidth && len(text) > 1 {
+		text = text[:len(text)-1]
+	}
+	return strings.TrimSpace(text) + "..."
+}
+
+func ogTextWidth(face font.Face, text string) int {
+	bounds, _ := font.BoundString(face, text)
+	return (bounds.Max.X - bounds.Min.X).Ceil()
+}
+
 // renderCollage tiles up to four thumbnails into the OG canvas with a small gap.
 func renderCollage(thumbs []image.Image) image.Image {
 	canvas := image.NewRGBA(image.Rect(0, 0, ogImageWidth, ogImageHeight))

backend/libs/handlers/pages.go

@@ -46,12 +46,26 @@ func (a *App) Home(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "unable to load upload policy", http.StatusInternalServerError)
 		return
 	}
+	actor := "anonymous"
+	if loggedIn {
+		actor = "user"
+	}
+	a.logger.Info("upload page viewed", withRequestLogAttrs(r,
+		"source", "page",
+		"severity", "user_activity",
+		"code", 2500,
+		"actor", actor,
+		"user_id", user.ID,
+	)...)
 	maxUploadSize, limitSummary := a.homeUploadPolicyLabels(settings, user, loggedIn, isAdmin)
 	expiryOptions, defaultExpiry := a.homeExpiryOptions(settings, user, loggedIn, isAdmin)
 	a.renderPage(w, r, http.StatusOK, "home.html", web.PageData{
-		Title:       "Upload your files",
+		Title:        "Upload your files",
-		Description: "Upload and share files through a self-hosted Warpbox instance.",
+		Description:  "Upload and share files fast. Drop a file, get a link — private, temporary transfers that expire on your terms.",
-		CurrentUser: currentUser,
+		CanonicalURL: absoluteURL(r, "/"),
+		ImageURL:     absoluteURL(r, "/static/og-default.png"),
+		ImageAlt:     "Warp Box — simple file sharing and fast downloads",
+		CurrentUser:  currentUser,
 		Data: homeData{
 			MaxUploadSize:        maxUploadSize,
 			LimitSummary:         limitSummary,
@@ -75,12 +89,16 @@ func (a *App) homeExpiryOptions(settings services.UploadPolicySettings, user ser
 		unlimited = true
 	case loggedIn:
 		maxDays = a.settingsService.EffectivePolicyForUser(settings, user).MaxDays
+		// A negative per-user MaxDays override means unlimited retention.
+		if maxDays < 0 {
+			unlimited = true
+		}
 	}
 	return buildExpiryOptions(maxDays, unlimited)
 }
 
 func buildExpiryOptions(maxDays int, unlimited bool) ([]expiryOption, int) {
-	ladder := []int{60, 720, 1440, 2880, 4320, 7200, 10080, 14400, 20160, 43200, 86400, 129600, 259200, 525600}
+	ladder := []int{60, 360, 720, 1440, 2880, 4320, 7200, 10080, 14400, 20160, 43200, 86400, 129600, 259200, 525600}
 
 	capMinutes := maxDays * 24 * 60
 	if unlimited || capMinutes <= 0 {
@@ -103,6 +121,10 @@ func buildExpiryOptions(maxDays int, unlimited bool) ([]expiryOption, int) {
 	if len(options) == 0 {
 		options = append(options, expiryOption{Minutes: capMinutes, Label: expiryLabel(capMinutes)})
 	}
+	// Unlimited uploaders can pick "never expires" (sentinel -1) after the ladder.
+	if unlimited {
+		options = append(options, expiryOption{Minutes: -1, Label: "Unlimited (never expires)"})
+	}
 
 	// Default to 24h when available, otherwise the smallest option offered.
 	defaultMinutes := options[0].Minutes
@@ -154,5 +176,9 @@ func (a *App) homeUploadPolicyLabels(settings services.UploadPolicySettings, use
 	if policy.StorageQuotaSet {
 		quota = services.FormatMegabytesLabel(policy.StorageQuotaMB)
 	}
-	return maxUpload, "Daily cap: " + services.FormatMegabytesLabel(policy.DailyUploadMB) + " · Storage quota: " + quota + " · " + strconv.Itoa(policy.MaxDays) + " day max."
+	expiryLimit := strconv.Itoa(policy.MaxDays) + " day max."
+	if policy.MaxDays < 0 {
+		expiryLimit = "no expiry limit."
+	}
+	return maxUpload, "Daily cap: " + services.FormatMegabytesLabel(policy.DailyUploadMB) + " · Storage quota: " + quota + " · " + expiryLimit
 }

backend/libs/handlers/resumable.go

@@ -0,0 +1,427 @@
+package handlers
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"warpbox.dev/backend/libs/helpers"
+	"warpbox.dev/backend/libs/jobs"
+	"warpbox.dev/backend/libs/services"
+)
+
+type resumableCreateRequest struct {
+	Files             []services.ResumableFileInput `json:"files"`
+	MaxDays           int                           `json:"maxDays"`
+	ExpiresMinutes    int                           `json:"expiresMinutes"`
+	MaxDownloads      int                           `json:"maxDownloads"`
+	Password          string                        `json:"password"`
+	ObfuscateMetadata bool                          `json:"obfuscateMetadata"`
+	CollectionID      string                        `json:"collectionId"`
+}
+
+type resumableSessionResponse struct {
+	SessionID   string                   `json:"sessionId"`
+	ResumeToken string                   `json:"resumeToken,omitempty"`
+	ChunkSize   int64                    `json:"chunkSize"`
+	Status      string                   `json:"status"`
+	BoxID       string                   `json:"boxId,omitempty"`
+	ExpiresAt   string                   `json:"expiresAt"`
+	Files       []services.ResumableFile `json:"files"`
+}
+
+func (a *App) CreateResumableUpload(w http.ResponseWriter, r *http.Request) {
+	user, loggedIn, authErr := a.currentUserWithAuthError(r)
+	if authErr != nil {
+		a.logger.Warn("resumable upload rejected invalid bearer token", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4011)...)
+		helpers.WriteJSONError(w, http.StatusUnauthorized, "invalid bearer token")
+		return
+	}
+	isAdminUpload := loggedIn && user.Role == services.UserRoleAdmin
+	settings, policy, ok := a.loadUploadPolicyForAPI(w, r, user, loggedIn)
+	if !ok {
+		return
+	}
+	if !settings.ResumableUploadsEnabled {
+		helpers.WriteJSONError(w, http.StatusForbidden, "resumable uploads are disabled")
+		return
+	}
+	if !loggedIn && !settings.AnonymousUploadsEnabled {
+		a.logger.Warn("resumable anonymous upload rejected disabled", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4013)...)
+		helpers.WriteJSONError(w, http.StatusForbidden, "anonymous uploads are disabled")
+		return
+	}
+	rateKey := uploadRateKey(r, user, loggedIn)
+	if !isAdminUpload && policy.ShortRequests > 0 && !a.rateLimiter.Allow("upload:"+rateKey, policy.ShortRequests, policy.ShortWindow, time.Now().UTC()) {
+		a.logger.Warn("resumable upload rate limited", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4291, "user_id", user.ID)...)
+		helpers.WriteJSONError(w, http.StatusTooManyRequests, "too many upload requests, please slow down")
+		return
+	}
+
+	var payload resumableCreateRequest
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		helpers.WriteJSONError(w, http.StatusBadRequest, "upload session request could not be read")
+		return
+	}
+	fileSizes := make([]int64, 0, len(payload.Files))
+	var totalBytes int64
+	for _, file := range payload.Files {
+		fileSizes = append(fileSizes, file.Size)
+		totalBytes += file.Size
+	}
+	if !isAdminUpload {
+		if status, message := a.checkUploadPolicyForSizes(r, user, loggedIn, settings, policy, fileSizes, totalBytes); message != "" {
+			a.logger.Warn("resumable upload rejected by policy", withRequestLogAttrs(r, "source", "quota", "severity", "warn", "code", status, "user_id", user.ID, "message", message, "bytes", totalBytes, "files", len(payload.Files))...)
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+		if status, message := a.checkBoxCreationPolicy(r, user, loggedIn, policy); message != "" {
+			a.logger.Warn("resumable upload rejected by box policy", withRequestLogAttrs(r, "source", "quota", "severity", "warn", "code", status, "user_id", user.ID, "message", message, "bytes", totalBytes, "files", len(payload.Files))...)
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+	}
+
+	opts, err := a.resumableUploadOptions(r, payload, user, loggedIn, isAdminUpload, policy)
+	if err != nil {
+		helpers.WriteJSONError(w, http.StatusRequestEntityTooLarge, err.Error())
+		return
+	}
+	chunkSize := int64(settings.ResumableChunkSizeMB * 1024 * 1024)
+	retention := time.Duration(settings.ResumableRetentionHours) * time.Hour
+	session, err := a.uploadService.CreateResumableSession(payload.Files, opts, chunkSize, retention, resumableChunkRoot(settings))
+	if err != nil {
+		a.logger.Warn("resumable session create failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4002, "user_id", user.ID, "error", err.Error())...)
+		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	a.logger.Info("resumable upload session created", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2002, "user_id", user.ID, "session_id", session.ID, "files", len(session.Files), "bytes", totalBytes, "anonymous", !loggedIn)...)
+	helpers.WriteJSON(w, http.StatusCreated, resumableResponse(session))
+}
+
+func (a *App) ResumableUploadStatus(w http.ResponseWriter, r *http.Request) {
+	session, ok := a.authorizedResumableSession(w, r)
+	if !ok {
+		return
+	}
+	helpers.WriteJSON(w, http.StatusOK, resumableResponse(session))
+}
+
+func (a *App) AddResumableFiles(w http.ResponseWriter, r *http.Request) {
+	session, ok := a.authorizedResumableSession(w, r)
+	if !ok {
+		return
+	}
+	user, loggedIn, _ := a.currentUserWithAuthError(r)
+	isAdminUpload := loggedIn && user.Role == services.UserRoleAdmin
+	settings, policy, ok := a.loadUploadPolicyForAPI(w, r, user, loggedIn)
+	if !ok {
+		return
+	}
+	var payload struct {
+		Files []services.ResumableFileInput `json:"files"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+		helpers.WriteJSONError(w, http.StatusBadRequest, "upload files request could not be read")
+		return
+	}
+	fileSizes := make([]int64, 0, len(session.Files)+len(payload.Files))
+	var totalBytes int64
+	for _, file := range session.Files {
+		fileSizes = append(fileSizes, file.Size)
+		totalBytes += file.Size
+	}
+	for _, file := range payload.Files {
+		fileSizes = append(fileSizes, file.Size)
+		totalBytes += file.Size
+	}
+	if !isAdminUpload {
+		if status, message := a.checkUploadPolicyForSizes(r, user, loggedIn, settings, policy, fileSizes, totalBytes); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+	}
+	updated, err := a.uploadService.AddResumableFiles(session.ID, payload.Files)
+	if err != nil {
+		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	a.logger.Info("resumable upload files added", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2006, "session_id", session.ID, "added", len(updated.Files)-len(session.Files), "files", len(updated.Files))...)
+	helpers.WriteJSON(w, http.StatusOK, resumableResponse(updated))
+}
+
+func (a *App) PutResumableChunk(w http.ResponseWriter, r *http.Request) {
+	session, ok := a.authorizedResumableSession(w, r)
+	if !ok {
+		return
+	}
+	fileID := r.PathValue("fileID")
+	index, err := strconv.Atoi(r.PathValue("index"))
+	if err != nil {
+		helpers.WriteJSONError(w, http.StatusBadRequest, "chunk index is invalid")
+		return
+	}
+	updated, err := a.uploadService.PutResumableChunk(r.Context(), session.ID, fileID, index, r.Body)
+	if err != nil {
+		a.logger.Warn("resumable chunk failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4003, "session_id", session.ID, "file_id", fileID, "chunk", index, "error", err.Error())...)
+		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	a.logger.Info("resumable chunk uploaded", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2003, "session_id", session.ID, "file_id", fileID, "chunk", index)...)
+	helpers.WriteJSON(w, http.StatusOK, resumableResponse(updated))
+}
+
+func (a *App) CompleteResumableUpload(w http.ResponseWriter, r *http.Request) {
+	session, ok := a.authorizedResumableSession(w, r)
+	if !ok {
+		return
+	}
+	if session.Status == services.ResumableStatusCompleted || session.Status == services.ResumableStatusProcessing {
+		result, completed, err := a.uploadService.CompleteResumableSession(r.Context(), session.ID)
+		if err != nil {
+			a.logger.Warn("resumable upload completion replay failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4004, "session_id", session.ID, "error", err.Error())...)
+			helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+			return
+		}
+		a.logger.Info("resumable upload completion replayed", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2004, "session_id", completed.ID, "box_id", result.BoxID, "files", len(result.Files))...)
+		helpers.WriteJSON(w, http.StatusOK, result)
+		return
+	}
+	user, loggedIn, _ := a.currentUserWithAuthError(r)
+	isAdminUpload := loggedIn && user.Role == services.UserRoleAdmin
+	settings, policy, ok := a.loadUploadPolicyForAPI(w, r, user, loggedIn)
+	if !ok {
+		return
+	}
+	fileSizes := make([]int64, 0, len(session.Files))
+	var totalBytes int64
+	for _, file := range session.Files {
+		fileSizes = append(fileSizes, file.Size)
+		totalBytes += file.Size
+	}
+	if !isAdminUpload {
+		if status, message := a.checkUploadPolicyForSizes(r, user, loggedIn, settings, policy, fileSizes, totalBytes); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+		if status, message := a.checkBoxCreationPolicy(r, user, loggedIn, policy); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+		if status, message := a.checkStorageBackendCapacity(session.Options.StorageBackendID, settings, totalBytes); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+	}
+	result, completed, err := a.uploadService.CreateProcessingBoxFromResumable(session.ID)
+	if err != nil {
+		a.logger.Warn("resumable upload complete failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4004, "session_id", session.ID, "error", err.Error())...)
+		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	if !isAdminUpload {
+		if err := a.recordUploadUsage(r, user, loggedIn, totalBytes, 1); err != nil {
+			a.logger.Warn("failed to record resumable upload usage", "source", "quota", "severity", "warn", "code", 4404, "error", err.Error())
+		}
+		if err := a.settingsService.CleanupUsage(time.Now().UTC(), settings.UsageRetentionDays); err != nil {
+			a.logger.Warn("failed to cleanup upload usage", "source", "quota", "severity", "warn", "code", 4405, "error", err.Error())
+		}
+	}
+	a.finalizeResumableUploadAsync(completed.ID, result.BoxID)
+	a.logger.Info("resumable upload queued for processing", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2004, "user_id", user.ID, "session_id", completed.ID, "box_id", result.BoxID, "files", len(result.Files), "bytes", totalBytes, "admin", isAdminUpload, "anonymous", !loggedIn)...)
+	helpers.WriteJSON(w, http.StatusCreated, result)
+}
+
+func (a *App) CompleteUploadedResumableUpload(w http.ResponseWriter, r *http.Request) {
+	session, ok := a.authorizedResumableSession(w, r)
+	if !ok {
+		return
+	}
+	user, loggedIn, _ := a.currentUserWithAuthError(r)
+	isAdminUpload := loggedIn && user.Role == services.UserRoleAdmin
+	settings, policy, ok := a.loadUploadPolicyForAPI(w, r, user, loggedIn)
+	if !ok {
+		return
+	}
+	fileSizes := make([]int64, 0, len(session.Files))
+	var totalBytes int64
+	var completeCount int
+	for _, file := range session.Files {
+		if len(file.UploadedChunks) != file.ChunkCount {
+			continue
+		}
+		fileSizes = append(fileSizes, file.Size)
+		totalBytes += file.Size
+		completeCount++
+	}
+	if completeCount == 0 {
+		helpers.WriteJSONError(w, http.StatusBadRequest, "no fully uploaded files to finish")
+		return
+	}
+	if !isAdminUpload {
+		if status, message := a.checkUploadPolicyForSizes(r, user, loggedIn, settings, policy, fileSizes, totalBytes); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+		if status, message := a.checkBoxCreationPolicy(r, user, loggedIn, policy); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+		if status, message := a.checkStorageBackendCapacity(session.Options.StorageBackendID, settings, totalBytes); message != "" {
+			helpers.WriteJSONError(w, status, message)
+			return
+		}
+	}
+	result, completed, err := a.uploadService.CompleteUploadedResumableSession(r.Context(), session.ID)
+	if err != nil {
+		a.logger.Warn("resumable partial complete failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4005, "session_id", session.ID, "error", err.Error())...)
+		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	if !isAdminUpload {
+		if err := a.recordUploadUsage(r, user, loggedIn, totalBytes, 1); err != nil {
+			a.logger.Warn("failed to record partial resumable upload usage", "source", "quota", "severity", "warn", "code", 4406, "error", err.Error())
+		}
+		if err := a.settingsService.CleanupUsage(time.Now().UTC(), settings.UsageRetentionDays); err != nil {
+			a.logger.Warn("failed to cleanup upload usage", "source", "quota", "severity", "warn", "code", 4405, "error", err.Error())
+		}
+	}
+	jobs.GenerateThumbnailsForBoxAsync(a.uploadService, a.logger, result.BoxID)
+	a.logger.Info("resumable uploaded files completed", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2007, "user_id", user.ID, "session_id", completed.ID, "box_id", result.BoxID, "files", len(result.Files), "bytes", totalBytes, "admin", isAdminUpload, "anonymous", !loggedIn)...)
+	helpers.WriteJSON(w, http.StatusCreated, result)
+}
+
+func (a *App) finalizeResumableUploadAsync(sessionID, boxID string) {
+	go func() {
+		a.logger.Info("resumable upload processing started", "source", "user-upload", "severity", "user_activity", "code", 2009, "session_id", sessionID, "box_id", boxID)
+		result, err := a.uploadService.FinalizeProcessingResumableSession(context.Background(), sessionID)
+		if err != nil {
+			a.logger.Warn("resumable upload processing failed", "source", "user-upload", "severity", "warn", "code", 4010, "session_id", sessionID, "box_id", boxID, "error", err.Error())
+			return
+		}
+		jobs.GenerateThumbnailsForBoxAsync(a.uploadService, a.logger, result.BoxID)
+		a.logger.Info("resumable upload processing completed", "source", "user-upload", "severity", "user_activity", "code", 2010, "session_id", sessionID, "box_id", result.BoxID, "files", len(result.Files))
+	}()
+}
+
+func resumableChunkRoot(settings services.UploadPolicySettings) string {
+	if settings.ResumableChunkMode != "custom" {
+		return ""
+	}
+	return strings.TrimSpace(settings.ResumableChunkPath)
+}
+
+func (a *App) CancelResumableUpload(w http.ResponseWriter, r *http.Request) {
+	session, ok := a.authorizedResumableSession(w, r)
+	if !ok {
+		return
+	}
+	if err := a.uploadService.CancelResumableSession(session.ID); err != nil {
+		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	a.logger.Info("resumable upload cancelled", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2005, "session_id", session.ID)...)
+	w.WriteHeader(http.StatusNoContent)
+}
+
+func (a *App) authorizedResumableSession(w http.ResponseWriter, r *http.Request) (services.ResumableSession, bool) {
+	user, loggedIn, authErr := a.currentUserWithAuthError(r)
+	if authErr != nil {
+		helpers.WriteJSONError(w, http.StatusUnauthorized, "invalid bearer token")
+		return services.ResumableSession{}, false
+	}
+	session, err := a.uploadService.GetResumableSession(r.PathValue("sessionID"))
+	if err != nil {
+		helpers.WriteJSONError(w, http.StatusNotFound, "upload session not found")
+		return services.ResumableSession{}, false
+	}
+	if !a.uploadService.VerifyResumableToken(session, r.Header.Get("X-Warpbox-Resume-Token")) {
+		helpers.WriteJSONError(w, http.StatusUnauthorized, "upload session not found")
+		return services.ResumableSession{}, false
+	}
+	if loggedIn {
+		if session.Options.OwnerID != user.ID {
+			helpers.WriteJSONError(w, http.StatusForbidden, "upload session not found")
+			return services.ResumableSession{}, false
+		}
+		return session, true
+	}
+	if session.Options.OwnerID != "" || session.Options.CreatorIP != uploadClientIP(r) {
+		helpers.WriteJSONError(w, http.StatusForbidden, "upload session not found")
+		return services.ResumableSession{}, false
+	}
+	return session, true
+}
+
+func (a *App) loadUploadPolicyForAPI(w http.ResponseWriter, r *http.Request, user services.User, loggedIn bool) (services.UploadPolicySettings, services.EffectiveUploadPolicy, bool) {
+	settings, err := a.settingsService.UploadPolicy()
+	if err != nil {
+		a.logger.Error("failed to load upload policy", "source", "settings", "severity", "error", "code", 5006, "error", err.Error())
+		helpers.WriteJSONError(w, http.StatusInternalServerError, "upload policy could not be loaded")
+		return services.UploadPolicySettings{}, services.EffectiveUploadPolicy{}, false
+	}
+	return settings, a.effectiveUploadPolicy(settings, user, loggedIn), true
+}
+
+func (a *App) resumableUploadOptions(r *http.Request, payload resumableCreateRequest, user services.User, loggedIn, isAdminUpload bool, policy services.EffectiveUploadPolicy) (services.UploadOptions, error) {
+	var ownerID string
+	var collectionID string
+	if loggedIn {
+		ownerID = user.ID
+		collectionID = strings.TrimSpace(payload.CollectionID)
+		if !a.authService.CollectionOwnedBy(collectionID, user.ID) {
+			return services.UploadOptions{}, fmt.Errorf("collection not found")
+		}
+	}
+	unlimitedExpiry := isAdminUpload || policy.MaxDays < 0
+	rawMaxDays := payload.MaxDays
+	maxDays := rawMaxDays
+	if maxDays <= 0 {
+		maxDays = 7
+		if policy.MaxDays > 0 && policy.MaxDays < maxDays {
+			maxDays = policy.MaxDays
+		}
+	}
+	expiresMinutes := payload.ExpiresMinutes
+	if expiresMinutes < 0 || rawMaxDays < 0 {
+		if !unlimitedExpiry {
+			return services.UploadOptions{}, fmt.Errorf("expiration cannot exceed %d days", policy.MaxDays)
+		}
+		expiresMinutes = -1
+	} else if !unlimitedExpiry {
+		if maxDays > policy.MaxDays {
+			return services.UploadOptions{}, fmt.Errorf("expiration cannot exceed %d days", policy.MaxDays)
+		}
+		if expiresMinutes > 0 && expiresMinutes > policy.MaxDays*24*60 {
+			return services.UploadOptions{}, fmt.Errorf("expiration cannot exceed %d days", policy.MaxDays)
+		}
+	}
+	return services.UploadOptions{
+		MaxDays:           maxDays,
+		ExpiresInMinutes:  expiresMinutes,
+		MaxDownloads:      payload.MaxDownloads,
+		Password:          payload.Password,
+		ObfuscateMetadata: payload.ObfuscateMetadata,
+		OwnerID:           ownerID,
+		CollectionID:      collectionID,
+		SkipSizeLimit:     isAdminUpload || policy.MaxUploadMB < 0,
+		CreatorIP:         uploadClientIP(r),
+		StorageBackendID:  policy.StorageBackendID,
+	}, nil
+}
+
+func resumableResponse(session services.ResumableSession) resumableSessionResponse {
+	return resumableSessionResponse{
+		SessionID:   session.ID,
+		ResumeToken: session.ResumeToken,
+		ChunkSize:   session.ChunkSize,
+		Status:      session.Status,
+		BoxID:       session.BoxID,
+		ExpiresAt:   session.ExpiresAt.Format(time.RFC3339),
+		Files:       session.Files,
+	}
+}

backend/libs/handlers/security.go

@@ -6,6 +6,8 @@ import (
 	"net/http"
 	"sync"
 	"time"
+
+	"warpbox.dev/backend/libs/services"
 )
 
 const csrfCookieName = "warpbox_csrf"
@@ -76,3 +78,29 @@ func randomToken(byteCount int) string {
 	}
 	return base64.RawURLEncoding.EncodeToString(data)
 }
+
+func (a *App) recordLoginAbuse(r *http.Request, kind, detail string) {
+	if a.banService == nil {
+		return
+	}
+	settings, err := a.banService.Settings()
+	if err != nil || !settings.AutoBanEnabled {
+		return
+	}
+	threshold := settings.UserLoginFailureThreshold
+	if kind == services.AbuseKindAdminLogin {
+		threshold = settings.AdminLoginFailureThreshold
+	}
+	ip := uploadClientIP(r)
+	result, err := a.banService.RecordAbuse(ip, kind, detail, threshold, time.Now().UTC())
+	if err != nil {
+		a.logger.Error("login abuse event failed", "source", "ban", "severity", "error", "code", 5004, "ip", ip, "kind", kind, "error", err.Error())
+		return
+	}
+	if result.Enabled {
+		a.logger.Warn("login abuse recorded", "source", "ban", "severity", "warn", "code", 4304, "ip", ip, "kind", kind, "count", result.Event.Count)
+	}
+	if result.Triggered {
+		a.logger.Warn("ip auto-banned for login abuse", "source", "ban", "severity", "warn", "code", 4305, "ip", ip, "kind", kind, "ban_id", result.Ban.ID)
+	}
+}

backend/libs/handlers/static.go

@@ -2,6 +2,7 @@ package handlers
 
 import (
 	"net/http"
+	"os"
 	"path/filepath"
 	"strings"
 )
@@ -15,6 +16,24 @@ func (a *App) Static() http.Handler {
 	})
 }
 
+func (a *App) EmojiAsset(w http.ResponseWriter, r *http.Request) {
+	pack := strings.TrimSpace(r.PathValue("pack"))
+	file := strings.TrimSpace(r.PathValue("file"))
+	if pack == "" || file == "" || strings.Contains(pack, "/") || strings.Contains(pack, "\\") || strings.Contains(pack, "..") || strings.Contains(file, "/") || strings.Contains(file, "\\") || strings.Contains(file, "..") || !isEmojiFile(file) {
+		http.NotFound(w, r)
+		return
+	}
+
+	path := filepath.Join(a.emojiRoot(), pack, file)
+	info, err := os.Stat(path)
+	if err != nil || info.IsDir() {
+		http.NotFound(w, r)
+		return
+	}
+	setStaticCacheHeaders(w, r.URL.Path)
+	http.ServeFile(w, r, path)
+}
+
 func setStaticCacheHeaders(w http.ResponseWriter, path string) {
 	ext := strings.ToLower(filepath.Ext(path))
 

backend/libs/handlers/upload.go

@@ -18,6 +18,7 @@ import (
 func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 	user, loggedIn, authErr := a.currentUserWithAuthError(r)
 	if authErr != nil {
+		a.logger.Warn("upload rejected invalid bearer token", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4010)...)
 		helpers.WriteJSONError(w, http.StatusUnauthorized, "invalid bearer token")
 		return
 	}
@@ -29,12 +30,14 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if !loggedIn && !settings.AnonymousUploadsEnabled {
+		a.logger.Warn("anonymous upload rejected disabled", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4012)...)
 		helpers.WriteJSONError(w, http.StatusForbidden, "anonymous uploads are disabled")
 		return
 	}
 	effectivePolicy := a.effectiveUploadPolicy(settings, user, loggedIn)
 	rateKey := uploadRateKey(r, user, loggedIn)
-	if !isAdminUpload && !a.rateLimiter.Allow("upload:"+rateKey, effectivePolicy.ShortRequests, effectivePolicy.ShortWindow, time.Now().UTC()) {
+	if !isAdminUpload && effectivePolicy.ShortRequests > 0 && !a.rateLimiter.Allow("upload:"+rateKey, effectivePolicy.ShortRequests, effectivePolicy.ShortWindow, time.Now().UTC()) {
+		a.logger.Warn("upload rate limited", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4290, "user_id", user.ID)...)
 		helpers.WriteJSONError(w, http.StatusTooManyRequests, "too many upload requests, please slow down")
 		return
 	}
@@ -49,6 +52,7 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 		parseLimit = 32 << 20
 	}
 	if err := r.ParseMultipartForm(parseLimit); err != nil {
+		a.logger.Warn("upload form parse failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4000, "user_id", user.ID, "error", err.Error())...)
 		helpers.WriteJSONError(w, http.StatusBadRequest, "upload form could not be read")
 		return
 	}
@@ -61,30 +65,51 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 		ownerID = user.ID
 		collectionID = r.FormValue("collection_id")
 		if !a.authService.CollectionOwnedBy(collectionID, user.ID) {
+			a.logger.Warn("upload rejected invalid collection", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4030, "user_id", user.ID, "collection_id", collectionID)...)
 			helpers.WriteJSONError(w, http.StatusForbidden, "collection not found")
 			return
 		}
 	}
 	if !isAdminUpload {
 		if status, message := a.checkUploadPolicy(r, user, loggedIn, settings, effectivePolicy, files, totalBytes); message != "" {
+			a.logger.Warn("upload rejected by policy", withRequestLogAttrs(r, "source", "quota", "severity", "warn", "code", status, "user_id", user.ID, "message", message, "bytes", totalBytes, "files", len(files))...)
 			helpers.WriteJSONError(w, status, message)
 			return
 		}
 	}
-	maxDays := parseInt(r.FormValue("max_days"))
+	// Unlimited expiry: admins, or users whose effective MaxDays is negative.
+	unlimitedExpiry := isAdminUpload || effectivePolicy.MaxDays < 0
+
+	rawMaxDays := parseInt(r.FormValue("max_days"))
+	maxDays := rawMaxDays
 	if maxDays <= 0 {
-		maxDays = min(7, effectivePolicy.MaxDays)
+		maxDays = 7
+		if effectivePolicy.MaxDays > 0 && effectivePolicy.MaxDays < maxDays {
+			maxDays = effectivePolicy.MaxDays
+		}
 	}
-	if !isAdminUpload && maxDays > effectivePolicy.MaxDays {
+	if !unlimitedExpiry && maxDays > effectivePolicy.MaxDays {
+		a.logger.Warn("upload rejected expiration days", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4131, "user_id", user.ID, "requested_days", maxDays, "max_days", effectivePolicy.MaxDays)...)
 		helpers.WriteJSONError(w, http.StatusRequestEntityTooLarge, fmt.Sprintf("expiration cannot exceed %d days", effectivePolicy.MaxDays))
 		return
 	}
+
 	expiresMinutes := parseInt(r.FormValue("expires_minutes"))
-	if expiresMinutes > 0 && !isAdminUpload && expiresMinutes > effectivePolicy.MaxDays*24*60 {
+	// A negative expires_minutes (or max_days) is the "never expires" request.
+	// Only honour it for unlimited uploaders; otherwise it's an invalid value.
+	if expiresMinutes < 0 || rawMaxDays < 0 {
+		if !unlimitedExpiry {
+			a.logger.Warn("upload rejected unlimited expiration", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4133, "user_id", user.ID)...)
+			helpers.WriteJSONError(w, http.StatusRequestEntityTooLarge, fmt.Sprintf("expiration cannot exceed %d days", effectivePolicy.MaxDays))
+			return
+		}
+		expiresMinutes = -1
+	} else if expiresMinutes > 0 && !unlimitedExpiry && expiresMinutes > effectivePolicy.MaxDays*24*60 {
+		a.logger.Warn("upload rejected expiration minutes", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4132, "user_id", user.ID, "requested_minutes", expiresMinutes, "max_days", effectivePolicy.MaxDays)...)
 		helpers.WriteJSONError(w, http.StatusRequestEntityTooLarge, fmt.Sprintf("expiration cannot exceed %d days", effectivePolicy.MaxDays))
 		return
 	}
-	result, err := a.uploadService.CreateBox(files, services.UploadOptions{
+	opts := services.UploadOptions{
 		MaxDays:           maxDays,
 		ExpiresInMinutes:  expiresMinutes,
 		MaxDownloads:      parseInt(r.FormValue("max_downloads")),
@@ -95,14 +120,20 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 		SkipSizeLimit:     isAdminUpload || effectivePolicy.MaxUploadMB < 0,
 		CreatorIP:         uploadClientIP(r),
 		StorageBackendID:  effectivePolicy.StorageBackendID,
-	})
+	}
+	result, boxesAdded, status, policyMessage, err := a.createOrAppendBox(r, user, loggedIn, effectivePolicy, files, opts, !isAdminUpload)
+	if policyMessage != "" {
+		a.logger.Warn("upload rejected by policy", withRequestLogAttrs(r, "source", "quota", "severity", "warn", "code", status, "user_id", user.ID, "message", policyMessage, "bytes", totalBytes, "files", len(files))...)
+		helpers.WriteJSONError(w, status, policyMessage)
+		return
+	}
 	if err != nil {
-		a.logger.Warn("upload failed", "source", "user-upload", "severity", "warn", "code", 4001, "error", err.Error())
+		a.logger.Warn("upload failed", withRequestLogAttrs(r, "source", "user-upload", "severity", "warn", "code", 4001, "user_id", user.ID, "error", err.Error())...)
 		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
 		return
 	}
 	if !isAdminUpload {
-		if err := a.recordUploadUsage(r, user, loggedIn, totalBytes, 1); err != nil {
+		if err := a.recordUploadUsage(r, user, loggedIn, totalBytes, boxesAdded); err != nil {
 			a.logger.Warn("failed to record upload usage", "source", "quota", "severity", "warn", "code", 4402, "error", err.Error())
 		}
 		if err := a.settingsService.CleanupUsage(time.Now().UTC(), settings.UsageRetentionDays); err != nil {
@@ -110,6 +141,7 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 	jobs.GenerateThumbnailsForBoxAsync(a.uploadService, a.logger, result.BoxID)
+	a.logger.Info("box uploaded", withRequestLogAttrs(r, "source", "user-upload", "severity", "user_activity", "code", 2001, "user_id", user.ID, "box_id", result.BoxID, "files", len(files), "bytes", totalBytes, "admin", isAdminUpload, "anonymous", !loggedIn)...)
 
 	if wantsJSON(r) {
 		helpers.WriteJSON(w, http.StatusCreated, result)
@@ -121,15 +153,97 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {
 	_, _ = fmt.Fprintln(w, result.BoxURL)
 }
 
+// createOrAppendBox creates a new box. It only ever appends to an existing box
+// when the request opts in via the X-Warpbox-Batch header: requests sharing the
+// same batch value (per account, or per IP for anonymous) within
+// uploadGroupWindow are folded into one box. Without the header the behaviour is
+// identical to creating a fresh box every time. Returns the result and how many
+// boxes were created (1 for a new box, 0 for an append) for usage accounting.
+func (a *App) createOrAppendBox(r *http.Request, user services.User, loggedIn bool, policy services.EffectiveUploadPolicy, files []*multipart.FileHeader, opts services.UploadOptions, enforceBoxLimits bool) (services.UploadResult, int, int, string, error) {
+	batch := strings.TrimSpace(r.Header.Get(uploadBatchHeader))
+	if batch == "" {
+		if enforceBoxLimits {
+			if status, message := a.checkBoxCreationPolicy(r, user, loggedIn, policy); message != "" {
+				return services.UploadResult{}, 0, status, message, nil
+			}
+		}
+		result, err := a.uploadService.CreateBox(files, opts)
+		if err != nil {
+			return services.UploadResult{}, 0, 0, "", err
+		}
+		return result, 1, 0, "", nil
+	}
+
+	// Group key is scoped to the uploader so batches never cross accounts/IPs.
+	identity := "ip:" + uploadClientIP(r)
+	if loggedIn {
+		identity = "user:" + user.ID
+	}
+	entry := a.uploadGroups.entryFor(identity + "|" + batch)
+
+	// Hold the per-key lock across the whole create/append so concurrent batched
+	// uploads serialise into the same box instead of racing.
+	entry.mu.Lock()
+	defer entry.mu.Unlock()
+
+	if entry.boxID != "" && time.Since(entry.at) < uploadGroupWindow {
+		if box, err := a.uploadService.GetBox(entry.boxID); err == nil && a.batchBoxMatches(box, user, loggedIn, r) && a.uploadService.CanDownload(box) == nil {
+			if result, err := a.uploadService.AppendFiles(entry.boxID, files, opts); err == nil {
+				// Re-attach the manage/delete URLs from the box's creation so every
+				// upload in the batch returns a working deletion URL.
+				result.ManageURL = entry.manageURL
+				result.DeleteURL = entry.deleteURL
+				entry.at = time.Now()
+				return result, 0, 0, "", nil
+			}
+		}
+	}
+
+	if enforceBoxLimits {
+		if status, message := a.checkBoxCreationPolicy(r, user, loggedIn, policy); message != "" {
+			return services.UploadResult{}, 0, status, message, nil
+		}
+	}
+	result, err := a.uploadService.CreateBox(files, opts)
+	if err != nil {
+		return services.UploadResult{}, 0, 0, "", err
+	}
+	entry.boxID = result.BoxID
+	entry.manageURL = result.ManageURL
+	entry.deleteURL = result.DeleteURL
+	entry.at = time.Now()
+	return result, 1, 0, "", nil
+}
+
+// batchBoxMatches guards that a batched append only ever touches a box owned by
+// the same uploader (account for logged-in users, creator IP for anonymous).
+func (a *App) batchBoxMatches(box services.Box, user services.User, loggedIn bool, r *http.Request) bool {
+	if loggedIn {
+		return box.OwnerID == user.ID
+	}
+	return box.OwnerID == "" && box.CreatorIP == uploadClientIP(r)
+}
+
 func (a *App) checkUploadPolicy(r *http.Request, user services.User, loggedIn bool, settings services.UploadPolicySettings, policy services.EffectiveUploadPolicy, files []*multipart.FileHeader, totalBytes int64) (int, string) {
 	if len(files) == 0 {
 		return 0, ""
 	}
+	sizes := make([]int64, 0, len(files))
+	for _, file := range files {
+		sizes = append(sizes, file.Size)
+	}
+	return a.checkUploadPolicyForSizes(r, user, loggedIn, settings, policy, sizes, totalBytes)
+}
+
+func (a *App) checkUploadPolicyForSizes(r *http.Request, user services.User, loggedIn bool, settings services.UploadPolicySettings, policy services.EffectiveUploadPolicy, fileSizes []int64, totalBytes int64) (int, string) {
+	if len(fileSizes) == 0 {
+		return 0, ""
+	}
 	now := time.Now().UTC()
 	if policy.MaxUploadMB > 0 {
 		maxBytes := services.MegabytesToBytes(policy.MaxUploadMB)
-		for _, file := range files {
+		for _, fileSize := range fileSizes {
-			if file.Size > maxBytes {
+			if fileSize > maxBytes {
 				return http.StatusRequestEntityTooLarge, "file exceeds upload size limit"
 			}
 		}
@@ -142,16 +256,6 @@ func (a *App) checkUploadPolicy(r *http.Request, user services.User, loggedIn bo
 		if policy.DailyUploadMB > 0 && usage.UploadedBytes+totalBytes > services.MegabytesToBytes(policy.DailyUploadMB) {
 			return http.StatusTooManyRequests, "anonymous daily upload limit reached"
 		}
-		if usage.UploadedBoxes+1 > policy.DailyBoxes {
-			return http.StatusTooManyRequests, "anonymous daily box limit reached"
-		}
-		activeBoxes, err := a.uploadService.ActiveBoxCountForIP(uploadClientIP(r))
-		if err != nil {
-			return http.StatusInternalServerError, "active box limit could not be checked"
-		}
-		if activeBoxes+1 > policy.ActiveBoxes {
-			return http.StatusTooManyRequests, "anonymous active box limit reached"
-		}
 		if status, message := a.checkStorageBackendCapacity(policy.StorageBackendID, settings, totalBytes); message != "" {
 			return status, message
 		}
@@ -165,16 +269,6 @@ func (a *App) checkUploadPolicy(r *http.Request, user services.User, loggedIn bo
 	if policy.DailyUploadMB > 0 && usage.UploadedBytes+totalBytes > services.MegabytesToBytes(policy.DailyUploadMB) {
 		return http.StatusTooManyRequests, "daily upload limit reached"
 	}
-	if usage.UploadedBoxes+1 > policy.DailyBoxes {
-		return http.StatusTooManyRequests, "daily box limit reached"
-	}
-	activeBoxes, err := a.uploadService.ActiveBoxCountForUser(user.ID)
-	if err != nil {
-		return http.StatusInternalServerError, "active box limit could not be checked"
-	}
-	if activeBoxes+1 > policy.ActiveBoxes {
-		return http.StatusTooManyRequests, "active box limit reached"
-	}
 	activeStorage, err := a.uploadService.UserActiveStorageUsed(user.ID)
 	if err != nil {
 		return http.StatusInternalServerError, "storage quota could not be checked"
@@ -188,6 +282,42 @@ func (a *App) checkUploadPolicy(r *http.Request, user services.User, loggedIn bo
 	return 0, ""
 }
 
+func (a *App) checkBoxCreationPolicy(r *http.Request, user services.User, loggedIn bool, policy services.EffectiveUploadPolicy) (int, string) {
+	now := time.Now().UTC()
+	if !loggedIn {
+		usage, err := a.settingsService.UsageForIP(uploadClientIP(r), now)
+		if err != nil {
+			return http.StatusInternalServerError, "upload usage could not be checked"
+		}
+		if policy.DailyBoxes > 0 && usage.UploadedBoxes+1 > policy.DailyBoxes {
+			return http.StatusTooManyRequests, "anonymous daily box limit reached"
+		}
+		activeBoxes, err := a.uploadService.ActiveBoxCountForIP(uploadClientIP(r))
+		if err != nil {
+			return http.StatusInternalServerError, "active box limit could not be checked"
+		}
+		if policy.ActiveBoxes > 0 && activeBoxes+1 > policy.ActiveBoxes {
+			return http.StatusTooManyRequests, "anonymous active box limit reached"
+		}
+		return 0, ""
+	}
+	usage, err := a.settingsService.UsageForUser(user.ID, now)
+	if err != nil {
+		return http.StatusInternalServerError, "upload usage could not be checked"
+	}
+	if policy.DailyBoxes > 0 && usage.UploadedBoxes+1 > policy.DailyBoxes {
+		return http.StatusTooManyRequests, "daily box limit reached"
+	}
+	activeBoxes, err := a.uploadService.ActiveBoxCountForUser(user.ID)
+	if err != nil {
+		return http.StatusInternalServerError, "active box limit could not be checked"
+	}
+	if policy.ActiveBoxes > 0 && activeBoxes+1 > policy.ActiveBoxes {
+		return http.StatusTooManyRequests, "active box limit reached"
+	}
+	return 0, ""
+}
+
 func (a *App) recordUploadUsage(r *http.Request, user services.User, loggedIn bool, totalBytes int64, boxes int) error {
 	now := time.Now().UTC()
 	if loggedIn {
@@ -235,7 +365,10 @@ func uploadParseLimit(policy services.EffectiveUploadPolicy, loggedIn bool, fall
 }
 
 func uploadClientIP(r *http.Request) string {
-	return services.ClientIP(r.RemoteAddr, r.Header.Get("X-Forwarded-For"))
+	if ip, ok := services.ClientIPFromContext(r); ok {
+		return ip
+	}
+	return services.ClientIP(r.RemoteAddr, r.Header.Get("X-Forwarded-For"), r.Header.Get("X-Real-IP"), nil)
 }
 
 func uploadRateKey(r *http.Request, user services.User, loggedIn bool) string {

backend/libs/handlers/upload_group.go

@@ -0,0 +1,76 @@
+package handlers
+
+import (
+	"sync"
+	"time"
+)
+
+// uploadGroupWindow is how long after a batched upload a follow-up upload with
+// the same X-Warpbox-Batch value (and same account/IP) is folded into the same
+// box. ShareX sends a multi-file selection as separate back-to-back requests;
+// the batch header lets it land them in one box.
+const uploadGroupWindow = 20 * time.Second
+
+// uploadBatchHeader is the opt-in request header. Without it, uploads behave
+// exactly as before (one box per request). With it, requests sharing the same
+// value (per account/IP) within uploadGroupWindow are grouped into one box.
+const uploadBatchHeader = "X-Warpbox-Batch"
+
+// uploadGroupPruneInterval is how often entryFor drops stale entries so the map
+// can't grow without bound (one key per account/IP + batch value otherwise).
+const uploadGroupPruneInterval = 5 * time.Minute
+
+// uploadGrouper tracks the most recent box per batch key so opt-in batched
+// uploads land in a single box. Each key has its own lock, which also serialises
+// that key's concurrent uploads so they append to the same box instead of racing
+// to create several.
+type uploadGrouper struct {
+	mu        sync.Mutex
+	entries   map[string]*uploadGroupEntry
+	lastPrune time.Time
+}
+
+type uploadGroupEntry struct {
+	mu        sync.Mutex
+	boxID     string
+	manageURL string
+	deleteURL string
+	at        time.Time
+}
+
+func newUploadGrouper() *uploadGrouper {
+	return &uploadGrouper{entries: make(map[string]*uploadGroupEntry)}
+}
+
+func (g *uploadGrouper) entryFor(key string) *uploadGroupEntry {
+	g.mu.Lock()
+	defer g.mu.Unlock()
+	g.pruneLocked(time.Now())
+	entry, ok := g.entries[key]
+	if !ok {
+		entry = &uploadGroupEntry{at: time.Now()}
+		g.entries[key] = entry
+	}
+	return entry
+}
+
+// pruneLocked drops entries whose last use is well past the grouping window so
+// the map stays bounded to recently-active keys. Callers must hold g.mu. Entries
+// currently in use are kept to avoid removing one a request is about to
+// populate.
+func (g *uploadGrouper) pruneLocked(now time.Time) {
+	if now.Sub(g.lastPrune) < uploadGroupPruneInterval {
+		return
+	}
+	g.lastPrune = now
+	for key, entry := range g.entries {
+		if !entry.mu.TryLock() {
+			continue
+		}
+		stale := now.Sub(entry.at) > 2*uploadGroupWindow
+		entry.mu.Unlock()
+		if stale {
+			delete(g.entries, key)
+		}
+	}
+}

backend/libs/handlers/upload_group_test.go

@@ -0,0 +1,24 @@
+package handlers
+
+import (
+	"testing"
+	"time"
+)
+
+func TestUploadGroupPrunesFailedEntries(t *testing.T) {
+	g := newUploadGrouper()
+	entry := g.entryFor("ip:203.0.113.1|failed")
+	entry.mu.Lock()
+	entry.at = time.Now().Add(-3 * uploadGroupWindow)
+	entry.mu.Unlock()
+	g.lastPrune = time.Now().Add(-uploadGroupPruneInterval)
+
+	_ = g.entryFor("ip:203.0.113.1|next")
+
+	if _, ok := g.entries["ip:203.0.113.1|failed"]; ok {
+		t.Fatalf("stale failed entry was not pruned")
+	}
+	if _, ok := g.entries["ip:203.0.113.1|next"]; !ok {
+		t.Fatalf("new entry was not created")
+	}
+}

backend/libs/handlers/upload_stage3_test.go

@@ -2,6 +2,7 @@ package handlers
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"io"
 	"log/slog"
@@ -10,8 +11,10 @@ import (
 	"net/http/httptest"
 	"os"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"testing"
+	"time"
 
 	"warpbox.dev/backend/libs/config"
 	"warpbox.dev/backend/libs/services"
@@ -46,6 +49,42 @@ func TestUploadJSONIncludesManageURLsAndAcceptsShareXField(t *testing.T) {
 	}
 }
 
+func TestFileReactionCanBeAddedOncePerVisitor(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	payload := uploadThroughApp(t, app)
+	if len(payload.Files) != 1 {
+		t.Fatalf("uploaded files = %d", len(payload.Files))
+	}
+
+	request := httptest.NewRequest(http.MethodPost, "/d/"+payload.BoxID+"/f/"+payload.Files[0].ID+"/react", strings.NewReader("emoji_id=openmoji/1F600.svg"))
+	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	request.SetPathValue("boxID", payload.BoxID)
+	request.SetPathValue("fileID", payload.Files[0].ID)
+	response := httptest.NewRecorder()
+	app.ReactToFile(response, request)
+	if response.Code != http.StatusCreated {
+		t.Fatalf("first reaction status = %d, body = %s", response.Code, response.Body.String())
+	}
+	if !strings.Contains(response.Body.String(), `"count":1`) {
+		t.Fatalf("reaction response missing count: %s", response.Body.String())
+	}
+
+	retry := httptest.NewRequest(http.MethodPost, "/d/"+payload.BoxID+"/f/"+payload.Files[0].ID+"/react", strings.NewReader("emoji_id=openmoji/1F600.svg"))
+	retry.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	retry.SetPathValue("boxID", payload.BoxID)
+	retry.SetPathValue("fileID", payload.Files[0].ID)
+	for _, cookie := range response.Result().Cookies() {
+		retry.AddCookie(cookie)
+	}
+	retryResponse := httptest.NewRecorder()
+	app.ReactToFile(retryResponse, retry)
+	if retryResponse.Code != http.StatusConflict {
+		t.Fatalf("second reaction status = %d, body = %s", retryResponse.Code, retryResponse.Body.String())
+	}
+}
+
 func TestUploadTextResponseReturnsOnlyBoxURL(t *testing.T) {
 	app, cleanup := newTestApp(t)
 	defer cleanup()
@@ -67,6 +106,452 @@ func TestUploadTextResponseReturnsOnlyBoxURL(t *testing.T) {
 	}
 }
 
+func TestSocialPreviewBotGetsCardForSingleNonMediaBox(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	payload := uploadThroughApp(t, app)
+
+	request := httptest.NewRequest(http.MethodGet, "/d/"+payload.BoxID, nil)
+	request.Header.Set("User-Agent", "Discordbot/2.0")
+	request.SetPathValue("boxID", payload.BoxID)
+	response := httptest.NewRecorder()
+	app.DownloadPage(response, request)
+
+	if response.Code != http.StatusOK {
+		t.Fatalf("status = %d, body = %s", response.Code, response.Body.String())
+	}
+	body := response.Body.String()
+	if !strings.Contains(body, `/d/`+payload.BoxID+`/f/`+payload.Files[0].ID+`/og-image.jpg"`) {
+		t.Fatalf("social preview bot did not receive file card metadata: %s", body)
+	}
+	if !strings.Contains(body, `class="file-thumb" src="/d/`+payload.BoxID+`/thumb/`+payload.Files[0].ID+`"`) {
+		t.Fatalf("download page did not render text thumbnail image: %s", body)
+	}
+	if !strings.Contains(body, "Click to preview or download") && !strings.Contains(body, "click to preview or download") {
+		t.Fatalf("social preview body missing preview/download description: %s", body)
+	}
+}
+
+func TestSocialPreviewBotGetsCardForNonMediaFilePreview(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	payload := uploadThroughApp(t, app)
+
+	request := httptest.NewRequest(http.MethodGet, "/d/"+payload.BoxID+"/f/"+payload.Files[0].ID, nil)
+	request.Header.Set("User-Agent", "TelegramBot")
+	request.SetPathValue("boxID", payload.BoxID)
+	request.SetPathValue("fileID", payload.Files[0].ID)
+	response := httptest.NewRecorder()
+	app.DownloadFile(response, request)
+
+	if response.Code != http.StatusOK {
+		t.Fatalf("status = %d, body = %s", response.Code, response.Body.String())
+	}
+	body := response.Body.String()
+	if !strings.Contains(body, `/d/`+payload.BoxID+`/f/`+payload.Files[0].ID+`/og-image.jpg"`) {
+		t.Fatalf("social preview bot did not receive file card metadata: %s", body)
+	}
+	if !strings.Contains(body, `name="twitter:card" content="summary_large_image"`) {
+		t.Fatalf("social preview body missing twitter card metadata: %s", body)
+	}
+}
+
+func TestSocialPreviewBotGetsRawImageFilePreview(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	request := multipartUploadRequest(t, "/api/v1/upload", "file", "image.png", "\x89PNG\r\n\x1a\nimage")
+	request.Header.Set("Accept", "application/json")
+	uploadResponse := httptest.NewRecorder()
+	app.Upload(uploadResponse, request)
+	if uploadResponse.Code != http.StatusCreated {
+		t.Fatalf("upload status = %d, body = %s", uploadResponse.Code, uploadResponse.Body.String())
+	}
+	var payload services.UploadResult
+	if err := json.Unmarshal(uploadResponse.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("json.Unmarshal returned error: %v", err)
+	}
+
+	previewRequest := httptest.NewRequest(http.MethodGet, "/d/"+payload.BoxID+"/f/"+payload.Files[0].ID, nil)
+	previewRequest.Header.Set("User-Agent", "Discordbot/2.0")
+	previewRequest.SetPathValue("boxID", payload.BoxID)
+	previewRequest.SetPathValue("fileID", payload.Files[0].ID)
+	response := httptest.NewRecorder()
+	app.DownloadFile(response, previewRequest)
+
+	if response.Code != http.StatusOK {
+		t.Fatalf("status = %d, body = %s", response.Code, response.Body.String())
+	}
+	if strings.Contains(response.Body.String(), "preview-title") {
+		t.Fatalf("image social preview bot received HTML preview page")
+	}
+	if !strings.HasPrefix(response.Body.String(), "\x89PNG\r\n\x1a\n") {
+		t.Fatalf("image social preview body = %q", response.Body.String())
+	}
+}
+
+func TestFilePreviewPageIncludesPreviewMetadata(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+	payload := uploadThroughApp(t, app)
+
+	request := httptest.NewRequest(http.MethodGet, "/d/"+payload.BoxID+"/f/"+payload.Files[0].ID, nil)
+	request.SetPathValue("boxID", payload.BoxID)
+	request.SetPathValue("fileID", payload.Files[0].ID)
+	response := httptest.NewRecorder()
+	app.DownloadFile(response, request)
+
+	if response.Code != http.StatusOK {
+		t.Fatalf("status = %d, body = %s", response.Code, response.Body.String())
+	}
+	body := response.Body.String()
+	for _, want := range []string{
+		`data-size-bytes="5"`,
+		`data-source-url="/d/` + payload.BoxID,
+		`data-download-url="/d/` + payload.BoxID,
+		`data-icon-url="/static/file-icons/`,
+		`data-preview-tabs`,
+	} {
+		if !strings.Contains(body, want) {
+			t.Fatalf("preview page missing %q: %s", want, body)
+		}
+	}
+}
+
+func TestResumableUploadFlowCreatesNormalBox(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	createBody := `{"files":[{"name":"note.txt","size":11,"contentType":"text/plain"}],"expiresMinutes":60}`
+	createRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable", strings.NewReader(createBody))
+	createRequest.Header.Set("Accept", "application/json")
+	createResponse := httptest.NewRecorder()
+	app.CreateResumableUpload(createResponse, createRequest)
+	if createResponse.Code != http.StatusCreated {
+		t.Fatalf("create status = %d, body = %s", createResponse.Code, createResponse.Body.String())
+	}
+	var session struct {
+		SessionID   string `json:"sessionId"`
+		ResumeToken string `json:"resumeToken"`
+		ChunkSize   int64  `json:"chunkSize"`
+		Files       []struct {
+			ID             string `json:"id"`
+			ChunkCount     int    `json:"chunkCount"`
+			UploadedChunks []int  `json:"uploadedChunks"`
+		} `json:"files"`
+	}
+	if err := json.Unmarshal(createResponse.Body.Bytes(), &session); err != nil {
+		t.Fatalf("json.Unmarshal session returned error: %v", err)
+	}
+	if session.SessionID == "" || session.ResumeToken == "" || session.ChunkSize != 4 || len(session.Files) != 1 || session.Files[0].ChunkCount != 3 {
+		t.Fatalf("unexpected session response: %+v", session)
+	}
+
+	chunks := map[int]string{1: "o wo", 0: "hell", 2: "rld"}
+	for index, body := range chunks {
+		request := httptest.NewRequest(http.MethodPut, "/api/v1/uploads/resumable/"+session.SessionID+"/files/"+session.Files[0].ID+"/chunks/"+strconv.Itoa(index), strings.NewReader(body))
+		request.SetPathValue("sessionID", session.SessionID)
+		request.SetPathValue("fileID", session.Files[0].ID)
+		request.SetPathValue("index", strconv.Itoa(index))
+		request.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+		response := httptest.NewRecorder()
+		app.PutResumableChunk(response, request)
+		if response.Code != http.StatusOK {
+			t.Fatalf("chunk %d status = %d, body = %s", index, response.Code, response.Body.String())
+		}
+	}
+
+	completeRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/complete", nil)
+	completeRequest.SetPathValue("sessionID", session.SessionID)
+	completeRequest.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	completeResponse := httptest.NewRecorder()
+	app.CompleteResumableUpload(completeResponse, completeRequest)
+	if completeResponse.Code != http.StatusCreated {
+		t.Fatalf("complete status = %d, body = %s", completeResponse.Code, completeResponse.Body.String())
+	}
+	var payload services.UploadResult
+	if err := json.Unmarshal(completeResponse.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("json.Unmarshal result returned error: %v", err)
+	}
+	replayRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/complete", nil)
+	replayRequest.SetPathValue("sessionID", session.SessionID)
+	replayRequest.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	replayResponse := httptest.NewRecorder()
+	app.CompleteResumableUpload(replayResponse, replayRequest)
+	if replayResponse.Code != http.StatusOK {
+		t.Fatalf("complete replay status = %d, body = %s", replayResponse.Code, replayResponse.Body.String())
+	}
+	var replayPayload services.UploadResult
+	if err := json.Unmarshal(replayResponse.Body.Bytes(), &replayPayload); err != nil {
+		t.Fatalf("json.Unmarshal replay result returned error: %v", err)
+	}
+	if replayPayload.BoxID != payload.BoxID || replayPayload.BoxURL == "" {
+		t.Fatalf("unexpected replay result: %+v, original: %+v", replayPayload, payload)
+	}
+	box := waitForProcessedBox(t, app, payload.BoxID)
+	if len(box.Files) != 1 || box.Files[0].Name != "note.txt" || box.Files[0].Size != 11 {
+		t.Fatalf("unexpected box files: %+v", box.Files)
+	}
+	object, err := app.uploadService.OpenFileObject(context.Background(), box, box.Files[0])
+	if err != nil {
+		t.Fatalf("OpenFileObject returned error: %v", err)
+	}
+	data, err := io.ReadAll(object.Body)
+	object.Body.Close()
+	if err != nil {
+		t.Fatalf("ReadAll returned error: %v", err)
+	}
+	if string(data) != "hello world" {
+		t.Fatalf("uploaded body = %q", string(data))
+	}
+}
+
+func TestResumableUploadRequiresAllChunks(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	createRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable", strings.NewReader(`{"files":[{"name":"note.txt","size":8,"contentType":"text/plain"}]}`))
+	createResponse := httptest.NewRecorder()
+	app.CreateResumableUpload(createResponse, createRequest)
+	if createResponse.Code != http.StatusCreated {
+		t.Fatalf("create status = %d, body = %s", createResponse.Code, createResponse.Body.String())
+	}
+	var session struct {
+		SessionID   string `json:"sessionId"`
+		ResumeToken string `json:"resumeToken"`
+		Files       []struct {
+			ID string `json:"id"`
+		} `json:"files"`
+	}
+	if err := json.Unmarshal(createResponse.Body.Bytes(), &session); err != nil {
+		t.Fatalf("json.Unmarshal session returned error: %v", err)
+	}
+	chunkRequest := httptest.NewRequest(http.MethodPut, "/api/v1/uploads/resumable/"+session.SessionID+"/files/"+session.Files[0].ID+"/chunks/0", strings.NewReader("hell"))
+	chunkRequest.SetPathValue("sessionID", session.SessionID)
+	chunkRequest.SetPathValue("fileID", session.Files[0].ID)
+	chunkRequest.SetPathValue("index", "0")
+	chunkRequest.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	chunkResponse := httptest.NewRecorder()
+	app.PutResumableChunk(chunkResponse, chunkRequest)
+	if chunkResponse.Code != http.StatusOK {
+		t.Fatalf("chunk status = %d, body = %s", chunkResponse.Code, chunkResponse.Body.String())
+	}
+
+	completeRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/complete", nil)
+	completeRequest.SetPathValue("sessionID", session.SessionID)
+	completeRequest.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	completeResponse := httptest.NewRecorder()
+	app.CompleteResumableUpload(completeResponse, completeRequest)
+	if completeResponse.Code != http.StatusBadRequest {
+		t.Fatalf("complete status = %d, body = %s", completeResponse.Code, completeResponse.Body.String())
+	}
+}
+
+func TestResumableStatusRequiresResumeToken(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	createRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable", strings.NewReader(`{"files":[{"name":"note.txt","size":4,"contentType":"text/plain"}]}`))
+	createResponse := httptest.NewRecorder()
+	app.CreateResumableUpload(createResponse, createRequest)
+	if createResponse.Code != http.StatusCreated {
+		t.Fatalf("create status = %d, body = %s", createResponse.Code, createResponse.Body.String())
+	}
+	var session struct {
+		SessionID   string `json:"sessionId"`
+		ResumeToken string `json:"resumeToken"`
+	}
+	if err := json.Unmarshal(createResponse.Body.Bytes(), &session); err != nil {
+		t.Fatalf("json.Unmarshal session returned error: %v", err)
+	}
+
+	missing := httptest.NewRequest(http.MethodGet, "/api/v1/uploads/resumable/"+session.SessionID, nil)
+	missing.SetPathValue("sessionID", session.SessionID)
+	missingResponse := httptest.NewRecorder()
+	app.ResumableUploadStatus(missingResponse, missing)
+	if missingResponse.Code != http.StatusUnauthorized {
+		t.Fatalf("missing token status = %d, body = %s", missingResponse.Code, missingResponse.Body.String())
+	}
+
+	wrong := httptest.NewRequest(http.MethodGet, "/api/v1/uploads/resumable/"+session.SessionID, nil)
+	wrong.SetPathValue("sessionID", session.SessionID)
+	wrong.Header.Set("X-Warpbox-Resume-Token", "wrong")
+	wrongResponse := httptest.NewRecorder()
+	app.ResumableUploadStatus(wrongResponse, wrong)
+	if wrongResponse.Code != http.StatusUnauthorized {
+		t.Fatalf("wrong token status = %d, body = %s", wrongResponse.Code, wrongResponse.Body.String())
+	}
+
+	valid := httptest.NewRequest(http.MethodGet, "/api/v1/uploads/resumable/"+session.SessionID, nil)
+	valid.SetPathValue("sessionID", session.SessionID)
+	valid.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	validResponse := httptest.NewRecorder()
+	app.ResumableUploadStatus(validResponse, valid)
+	if validResponse.Code != http.StatusOK {
+		t.Fatalf("valid token status = %d, body = %s", validResponse.Code, validResponse.Body.String())
+	}
+	if strings.Contains(validResponse.Body.String(), "resumeTokenHash") {
+		t.Fatalf("status response leaked token hash: %s", validResponse.Body.String())
+	}
+}
+
+func TestResumableUploadCanAddFilesToExistingSession(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	createBody := `{"files":[{"name":"one.txt","size":4,"contentType":"text/plain","fingerprint":"one"}],"expiresMinutes":60}`
+	createRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable", strings.NewReader(createBody))
+	createResponse := httptest.NewRecorder()
+	app.CreateResumableUpload(createResponse, createRequest)
+	if createResponse.Code != http.StatusCreated {
+		t.Fatalf("create status = %d, body = %s", createResponse.Code, createResponse.Body.String())
+	}
+	var session struct {
+		SessionID   string `json:"sessionId"`
+		ResumeToken string `json:"resumeToken"`
+		Files       []struct {
+			ID string `json:"id"`
+		} `json:"files"`
+	}
+	if err := json.Unmarshal(createResponse.Body.Bytes(), &session); err != nil {
+		t.Fatalf("json.Unmarshal session returned error: %v", err)
+	}
+	firstChunk := httptest.NewRequest(http.MethodPut, "/api/v1/uploads/resumable/"+session.SessionID+"/files/"+session.Files[0].ID+"/chunks/0", strings.NewReader("one!"))
+	firstChunk.SetPathValue("sessionID", session.SessionID)
+	firstChunk.SetPathValue("fileID", session.Files[0].ID)
+	firstChunk.SetPathValue("index", "0")
+	firstChunk.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	firstChunkResponse := httptest.NewRecorder()
+	app.PutResumableChunk(firstChunkResponse, firstChunk)
+	if firstChunkResponse.Code != http.StatusOK {
+		t.Fatalf("first chunk status = %d, body = %s", firstChunkResponse.Code, firstChunkResponse.Body.String())
+	}
+
+	addRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/files", strings.NewReader(`{"files":[{"name":"two.txt","size":4,"contentType":"text/plain","fingerprint":"two"}]}`))
+	addRequest.SetPathValue("sessionID", session.SessionID)
+	addRequest.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	addResponse := httptest.NewRecorder()
+	app.AddResumableFiles(addResponse, addRequest)
+	if addResponse.Code != http.StatusOK {
+		t.Fatalf("add status = %d, body = %s", addResponse.Code, addResponse.Body.String())
+	}
+	var updated struct {
+		Files []struct {
+			ID             string `json:"id"`
+			Name           string `json:"name"`
+			UploadedChunks []int  `json:"uploadedChunks"`
+		} `json:"files"`
+	}
+	if err := json.Unmarshal(addResponse.Body.Bytes(), &updated); err != nil {
+		t.Fatalf("json.Unmarshal updated returned error: %v", err)
+	}
+	if len(updated.Files) != 2 || len(updated.Files[0].UploadedChunks) != 1 {
+		t.Fatalf("unexpected updated session: %+v", updated)
+	}
+	secondChunk := httptest.NewRequest(http.MethodPut, "/api/v1/uploads/resumable/"+session.SessionID+"/files/"+updated.Files[1].ID+"/chunks/0", strings.NewReader("two!"))
+	secondChunk.SetPathValue("sessionID", session.SessionID)
+	secondChunk.SetPathValue("fileID", updated.Files[1].ID)
+	secondChunk.SetPathValue("index", "0")
+	secondChunk.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	secondChunkResponse := httptest.NewRecorder()
+	app.PutResumableChunk(secondChunkResponse, secondChunk)
+	if secondChunkResponse.Code != http.StatusOK {
+		t.Fatalf("second chunk status = %d, body = %s", secondChunkResponse.Code, secondChunkResponse.Body.String())
+	}
+	completeRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/complete", nil)
+	completeRequest.SetPathValue("sessionID", session.SessionID)
+	completeRequest.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	completeResponse := httptest.NewRecorder()
+	app.CompleteResumableUpload(completeResponse, completeRequest)
+	if completeResponse.Code != http.StatusCreated {
+		t.Fatalf("complete status = %d, body = %s", completeResponse.Code, completeResponse.Body.String())
+	}
+	var payload services.UploadResult
+	if err := json.Unmarshal(completeResponse.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("json.Unmarshal result returned error: %v", err)
+	}
+	box, err := app.uploadService.GetBox(payload.BoxID)
+	if err != nil {
+		t.Fatalf("GetBox returned error: %v", err)
+	}
+	if len(box.Files) != 2 {
+		t.Fatalf("box file count = %d, want 2", len(box.Files))
+	}
+}
+
+func TestResumableCompleteUploadedRequiresTokenAndKeepsFinishedFiles(t *testing.T) {
+	app, cleanup := newTestApp(t)
+	defer cleanup()
+
+	createBody := `{"files":[{"name":"done.txt","size":4,"contentType":"text/plain","fingerprint":"done"},{"name":"partial.txt","size":8,"contentType":"text/plain","fingerprint":"partial"}],"expiresMinutes":60}`
+	createRequest := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable", strings.NewReader(createBody))
+	createResponse := httptest.NewRecorder()
+	app.CreateResumableUpload(createResponse, createRequest)
+	if createResponse.Code != http.StatusCreated {
+		t.Fatalf("create status = %d, body = %s", createResponse.Code, createResponse.Body.String())
+	}
+	var session struct {
+		SessionID   string `json:"sessionId"`
+		ResumeToken string `json:"resumeToken"`
+		Files       []struct {
+			ID string `json:"id"`
+		} `json:"files"`
+	}
+	if err := json.Unmarshal(createResponse.Body.Bytes(), &session); err != nil {
+		t.Fatalf("json.Unmarshal session returned error: %v", err)
+	}
+	for _, chunk := range []struct {
+		fileIndex int
+		index     string
+		body      string
+	}{
+		{fileIndex: 0, index: "0", body: "done"},
+		{fileIndex: 1, index: "0", body: "part"},
+	} {
+		request := httptest.NewRequest(http.MethodPut, "/api/v1/uploads/resumable/"+session.SessionID+"/files/"+session.Files[chunk.fileIndex].ID+"/chunks/"+chunk.index, strings.NewReader(chunk.body))
+		request.SetPathValue("sessionID", session.SessionID)
+		request.SetPathValue("fileID", session.Files[chunk.fileIndex].ID)
+		request.SetPathValue("index", chunk.index)
+		request.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+		response := httptest.NewRecorder()
+		app.PutResumableChunk(response, request)
+		if response.Code != http.StatusOK {
+			t.Fatalf("chunk status = %d, body = %s", response.Code, response.Body.String())
+		}
+	}
+
+	missing := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/complete-uploaded", nil)
+	missing.SetPathValue("sessionID", session.SessionID)
+	missingResponse := httptest.NewRecorder()
+	app.CompleteUploadedResumableUpload(missingResponse, missing)
+	if missingResponse.Code != http.StatusUnauthorized {
+		t.Fatalf("missing token status = %d, body = %s", missingResponse.Code, missingResponse.Body.String())
+	}
+
+	complete := httptest.NewRequest(http.MethodPost, "/api/v1/uploads/resumable/"+session.SessionID+"/complete-uploaded", nil)
+	complete.SetPathValue("sessionID", session.SessionID)
+	complete.Header.Set("X-Warpbox-Resume-Token", session.ResumeToken)
+	completeResponse := httptest.NewRecorder()
+	app.CompleteUploadedResumableUpload(completeResponse, complete)
+	if completeResponse.Code != http.StatusCreated {
+		t.Fatalf("complete-uploaded status = %d, body = %s", completeResponse.Code, completeResponse.Body.String())
+	}
+	var payload services.UploadResult
+	if err := json.Unmarshal(completeResponse.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("json.Unmarshal result returned error: %v", err)
+	}
+	box, err := app.uploadService.GetBox(payload.BoxID)
+	if err != nil {
+		t.Fatalf("GetBox returned error: %v", err)
+	}
+	if len(box.Files) != 1 || box.Files[0].Name != "done.txt" {
+		t.Fatalf("complete-uploaded box files = %+v", box.Files)
+	}
+	if _, err := app.uploadService.GetResumableSession(session.SessionID); !os.IsNotExist(err) {
+		t.Fatalf("GetResumableSession after complete-uploaded error = %v, want os.ErrNotExist", err)
+	}
+}
+
 func TestManageBoxAndDeleteFlow(t *testing.T) {
 	app, cleanup := newTestApp(t)
 	defer cleanup()
@@ -178,13 +663,16 @@ func newTestApp(t *testing.T) (*App, func()) {
 
 	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
 	cfg := config.Config{
-		AppName:       "warpbox.dev",
+		AppName:                 "warpbox.dev",
-		AppVersion:    "test",
+		AppVersion:              "test",
-		BaseURL:       "http://example.test",
+		BaseURL:                 "http://example.test",
-		DataDir:       filepath.Join(root, "data"),
+		DataDir:                 filepath.Join(root, "data"),
-		StaticDir:     staticDir,
+		StaticDir:               staticDir,
-		TemplateDir:   templateDir,
+		TemplateDir:             templateDir,
-		MaxUploadSize: 1024 * 1024,
+		MaxUploadSize:           1024 * 1024,
+		ResumableUploadsEnabled: true,
+		ResumableChunkSize:      4,
+		ResumableRetention:      time.Hour,
 		DefaultSettings: config.SettingsDefaults{
 			AnonymousUploadsEnabled: true,
 			AnonymousMaxUploadMB:    1,
@@ -192,12 +680,24 @@ func newTestApp(t *testing.T) (*App, func()) {
 			UserDailyUploadMB:       8,
 			DefaultUserStorageMB:    16,
 			UsageRetentionDays:      30,
+			ResumableUploadsEnabled: true,
+			ResumableChunkSizeMB:    0.000003814697265625,
+			ResumableRetentionHours: 1,
+			ResumableChunkMode:      "same",
 		},
 	}
 	service, err := services.NewUploadService(cfg.MaxUploadSize, cfg.DataDir, cfg.BaseURL, logger)
 	if err != nil {
 		t.Fatalf("NewUploadService returned error: %v", err)
 	}
+	if err := os.MkdirAll(filepath.Join(cfg.DataDir, "emoji", "openmoji"), 0o755); err != nil {
+		service.Close()
+		t.Fatalf("create emoji test dir: %v", err)
+	}
+	if err := os.WriteFile(filepath.Join(cfg.DataDir, "emoji", "openmoji", "1F600.svg"), []byte(`<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1 1"></svg>`), 0o644); err != nil {
+		service.Close()
+		t.Fatalf("write emoji test file: %v", err)
+	}
 	renderer, err := web.NewRenderer(cfg.TemplateDir, cfg.AppName, cfg.AppVersion, cfg.BaseURL)
 	if err != nil {
 		service.Close()
@@ -213,7 +713,17 @@ func newTestApp(t *testing.T) (*App, func()) {
 		service.Close()
 		t.Fatalf("NewSettingsService returned error: %v", err)
 	}
-	return NewApp(cfg, logger, renderer, service, authService, settingsService), func() {
+	reactionService, err := services.NewReactionService(service.DB())
+	if err != nil {
+		service.Close()
+		t.Fatalf("NewReactionService returned error: %v", err)
+	}
+	banService, err := services.NewBanService(service.DB())
+	if err != nil {
+		service.Close()
+		t.Fatalf("NewBanService returned error: %v", err)
+	}
+	return NewApp(cfg, logger, renderer, service, authService, settingsService, reactionService, banService), func() {
 		if err := service.Close(); err != nil {
 			t.Fatalf("Close returned error: %v", err)
 		}
@@ -288,6 +798,31 @@ func tokenFromURL(t *testing.T, value string) string {
 	return parts[len(parts)-1]
 }
 
+func waitForProcessedBox(t *testing.T, app *App, boxID string) services.Box {
+	t.Helper()
+	var box services.Box
+	for i := 0; i < 50; i++ {
+		next, err := app.uploadService.GetBox(boxID)
+		if err != nil {
+			t.Fatalf("GetBox returned error: %v", err)
+		}
+		box = next
+		processing := false
+		for _, file := range box.Files {
+			if file.Processing {
+				processing = true
+				break
+			}
+		}
+		if !processing {
+			return box
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	t.Fatalf("box %s was still processing: %+v", boxID, box.Files)
+	return box
+}
+
 func copyDir(src, dst string) error {
 	return filepath.WalkDir(src, func(path string, d os.DirEntry, err error) error {
 		if err != nil {

backend/libs/httpserver/server.go

@@ -32,8 +32,18 @@ func New(cfg config.Config, logger *slog.Logger) (*http.Server, error) {
 		uploadService.Close()
 		return nil, err
 	}
-	stopJobs := jobs.StartAll(cfg, logger, uploadService)
+	reactionService, err := services.NewReactionService(uploadService.DB())
-	app := handlers.NewApp(cfg, logger, renderer, uploadService, authService, settingsService)
+	if err != nil {
+		uploadService.Close()
+		return nil, err
+	}
+	banService, err := services.NewBanService(uploadService.DB())
+	if err != nil {
+		uploadService.Close()
+		return nil, err
+	}
+	stopJobs := jobs.StartAll(cfg, logger, uploadService, banService)
+	app := handlers.NewApp(cfg, logger, renderer, uploadService, authService, settingsService, reactionService, banService)
 
 	router := http.NewServeMux()
 	app.RegisterRoutes(router)
@@ -44,15 +54,17 @@ func New(cfg config.Config, logger *slog.Logger) (*http.Server, error) {
 		middleware.RequestID,
 		middleware.SecurityHeaders,
 		middleware.Gzip,
-		middleware.Logger(logger),
+		middleware.ClientIP(cfg.TrustedProxies),
+		middleware.Bans(logger, banService, cfg.TrustedProxies),
 	)
 
 	server := &http.Server{
-		Addr:         cfg.Addr,
+		Addr:              cfg.Addr,
-		Handler:      handler,
+		Handler:           handler,
-		ReadTimeout:  cfg.ReadTimeout,
+		ReadHeaderTimeout: cfg.ReadHeaderTimeout,
-		WriteTimeout: cfg.WriteTimeout,
+		ReadTimeout:       cfg.ReadTimeout,
-		IdleTimeout:  cfg.IdleTimeout,
+		WriteTimeout:      cfg.WriteTimeout,
+		IdleTimeout:       cfg.IdleTimeout,
 	}
 	server.RegisterOnShutdown(func() {
 		stopJobs()

backend/libs/jobs/cleanup.go

@@ -8,7 +8,7 @@ import (
 	"warpbox.dev/backend/libs/services"
 )
 
-func newCleanupJob(cfg config.Config, logger *slog.Logger, uploadService *services.UploadService) job {
+func newCleanupJob(cfg config.Config, logger *slog.Logger, uploadService *services.UploadService, banService *services.BanService) job {
 	return job{
 		name:     "cleanup",
 		enabled:  cfg.CleanupEnabled,
@@ -22,12 +22,35 @@ func newCleanupJob(cfg config.Config, logger *slog.Logger, uploadService *servic
 			if cleaned > 0 {
 				logger.Info("cleanup job complete", "source", "housekeeping", "severity", "user_activity", "code", 2202, "cleaned", cleaned)
 			}
+			cleanedUploads, err := uploadService.CleanupExpiredResumableSessions(time.Now().UTC())
+			if err != nil {
+				logger.Warn("resumable upload cleanup failed", "source", "housekeeping", "severity", "warn", "code", 4204, "error", err.Error())
+				return
+			}
+			if cleanedUploads > 0 {
+				logger.Info("resumable uploads cleaned", "source", "housekeeping", "severity", "user_activity", "code", 2204, "cleaned", cleanedUploads)
+			}
+			if banService != nil {
+				cleanedEvents, err := banService.CleanupAbuseEvents(time.Now().UTC())
+				if err != nil {
+					logger.Warn("ban evidence cleanup failed", "source", "housekeeping", "severity", "warn", "code", 4203, "error", err.Error())
+					return
+				}
+				if cleanedEvents > 0 {
+					logger.Info("ban evidence cleaned", "source", "housekeeping", "severity", "user_activity", "code", 2203, "cleaned", cleanedEvents)
+				}
+			}
 		},
 	}
 }
 
 func RunCleanupNow(uploadService *services.UploadService, logger *slog.Logger) (int, error) {
-	return cleanupUnavailableBoxes(uploadService, logger)
+	cleaned, err := cleanupUnavailableBoxes(uploadService, logger)
+	if err != nil {
+		return cleaned, err
+	}
+	cleanedUploads, err := uploadService.CleanupExpiredResumableSessions(time.Now().UTC())
+	return cleaned + cleanedUploads, err
 }
 
 func cleanupUnavailableBoxes(uploadService *services.UploadService, logger *slog.Logger) (int, error) {

backend/libs/jobs/jobs.go

@@ -16,14 +16,14 @@ type job struct {
 	run      func()
 }
 
-func StartAll(cfg config.Config, logger *slog.Logger, uploadService *services.UploadService) func() {
+func StartAll(cfg config.Config, logger *slog.Logger, uploadService *services.UploadService, banService *services.BanService) func() {
 	if !cfg.JobsEnabled {
 		logger.Info("background jobs disabled", "source", "jobs", "severity", "dev")
 		return func() {}
 	}
 
 	stops := []func(){
-		start(newCleanupJob(cfg, logger, uploadService), logger),
+		start(newCleanupJob(cfg, logger, uploadService, banService), logger),
 		start(newThumbnailsJob(cfg, logger, uploadService), logger),
 	}
 

backend/libs/jobs/thumbnails.go

@@ -3,18 +3,25 @@ package jobs
 import (
 	"bytes"
 	"context"
+	"html"
 	"image"
+	"image/color"
+	"image/draw"
 	_ "image/gif"
 	"image/jpeg"
-	_ "image/jpeg"
 	_ "image/png"
 	"io"
 	"log/slog"
 	"os"
 	"os/exec"
+	"path/filepath"
+	"regexp"
 	"strings"
 	"time"
 
+	"golang.org/x/image/font"
+	"golang.org/x/image/font/basicfont"
+	"golang.org/x/image/math/fixed"
 	_ "golang.org/x/image/webp"
 	"warpbox.dev/backend/libs/config"
 	"warpbox.dev/backend/libs/services"
@@ -131,7 +138,15 @@ func generateMissingThumbnailsForBox(uploadService *services.UploadService, logg
 }
 
 func needsThumbnail(file services.File) bool {
-	return file.PreviewKind == "image" || file.PreviewKind == "video"
+	return file.PreviewKind == "image" || file.PreviewKind == "video" || isTextThumbnailCandidate(file)
+}
+
+func NeedsThumbnail(file services.File) bool {
+	return needsThumbnail(file)
+}
+
+func GenerateThumbnailForFile(uploadService *services.UploadService, box services.Box, file services.File) (string, error) {
+	return generateThumbnail(uploadService, box, file)
 }
 
 func generateThumbnail(uploadService *services.UploadService, box services.Box, file services.File) (string, error) {
@@ -157,11 +172,39 @@ func generateThumbnail(uploadService *services.UploadService, box services.Box,
 		}
 		_, err = uploadService.PutThumbnailObject(context.Background(), box, thumbnailName, bytes.NewReader(data), int64(len(data)), "image/jpeg")
 		return thumbnailName, err
+	case isTextThumbnailCandidate(file):
+		data, err := createTextThumbnail(file, object.Body)
+		if err != nil {
+			return "", err
+		}
+		_, err = uploadService.PutThumbnailObject(context.Background(), box, thumbnailName, bytes.NewReader(data), int64(len(data)), "image/jpeg")
+		return thumbnailName, err
 	default:
 		return "", nil
 	}
 }
 
+func isTextThumbnailCandidate(file services.File) bool {
+	contentType := strings.ToLower(strings.TrimSpace(file.ContentType))
+	if i := strings.IndexByte(contentType, ';'); i >= 0 {
+		contentType = strings.TrimSpace(contentType[:i])
+	}
+	if strings.HasPrefix(contentType, "text/") {
+		return true
+	}
+	switch contentType {
+	case "application/json", "application/ld+json", "application/xml", "application/javascript", "application/x-javascript", "application/markdown":
+		return true
+	}
+	ext := strings.TrimPrefix(strings.ToLower(filepath.Ext(file.Name)), ".")
+	switch ext {
+	case "c", "cc", "conf", "cpp", "cs", "css", "csv", "diff", "dockerfile", "go", "h", "hpp", "htm", "html", "ini", "java", "js", "json", "jsx", "kt", "log", "lua", "md", "mdown", "markdown", "php", "pl", "properties", "py", "rb", "rs", "sh", "sql", "swift", "toml", "ts", "tsx", "txt", "xml", "yaml", "yml", "zig":
+		return true
+	default:
+		return false
+	}
+}
+
 func createImageThumbnail(source io.Reader) ([]byte, error) {
 	img, _, err := image.Decode(source)
 	if err != nil {
@@ -203,6 +246,197 @@ func createVideoThumbnail(source io.Reader) ([]byte, error) {
 	return os.ReadFile(targetPath)
 }
 
+func createTextThumbnail(file services.File, source io.Reader) ([]byte, error) {
+	data, err := io.ReadAll(io.LimitReader(source, 128*1024))
+	if err != nil {
+		return nil, err
+	}
+	sourceText := strings.ReplaceAll(string(data), "\r\n", "\n")
+	sourceText = strings.ReplaceAll(sourceText, "\r", "\n")
+
+	mode := textThumbnailMode(file)
+	title := strings.ToUpper(mode)
+	var lines []string
+	if mode == "HTML" {
+		lines = renderedHTMLThumbnailLines(sourceText)
+	} else if mode == "MARKDOWN" {
+		lines = renderedMarkdownThumbnailLines(sourceText)
+	} else {
+		title = "CODE"
+		lines = codeThumbnailLines(sourceText)
+	}
+	return renderTextThumbnail(file.Name, title, lines), nil
+}
+
+func textThumbnailMode(file services.File) string {
+	contentType := strings.ToLower(strings.TrimSpace(file.ContentType))
+	if i := strings.IndexByte(contentType, ';'); i >= 0 {
+		contentType = strings.TrimSpace(contentType[:i])
+	}
+	ext := strings.TrimPrefix(strings.ToLower(filepath.Ext(file.Name)), ".")
+	if ext == "html" || ext == "htm" || contentType == "text/html" {
+		return "HTML"
+	}
+	if ext == "md" || ext == "mdown" || ext == "markdown" || contentType == "text/markdown" || contentType == "application/markdown" {
+		return "MARKDOWN"
+	}
+	return "CODE"
+}
+
+func renderedHTMLThumbnailLines(source string) []string {
+	text := regexp.MustCompile(`(?is)<script[^>]*>.*?</script>`).ReplaceAllString(source, " ")
+	text = regexp.MustCompile(`(?is)<style[^>]*>.*?</style>`).ReplaceAllString(text, " ")
+	text = regexp.MustCompile(`(?i)</?(p|div|section|article|main|header|footer|br|li|ul|ol|h[1-6]|tr|table|blockquote|pre|code)[^>]*>`).ReplaceAllString(text, "\n")
+	text = regexp.MustCompile(`(?s)<[^>]+>`).ReplaceAllString(text, " ")
+	text = html.UnescapeString(text)
+	return documentThumbnailLines(text)
+}
+
+func renderedMarkdownThumbnailLines(source string) []string {
+	text := regexp.MustCompile("(?s)```.*?```").ReplaceAllStringFunc(source, func(block string) string {
+		block = strings.Trim(block, "` \n\t")
+		lines := strings.Split(block, "\n")
+		if len(lines) > 1 {
+			lines = lines[1:]
+		}
+		return "\n" + strings.Join(lines, "\n") + "\n"
+	})
+	text = regexp.MustCompile(`(?m)^#{1,6}\s*`).ReplaceAllString(text, "")
+	text = regexp.MustCompile(`!\[([^\]]*)\]\([^)]+\)`).ReplaceAllString(text, "$1")
+	text = regexp.MustCompile(`\[([^\]]+)\]\([^)]+\)`).ReplaceAllString(text, "$1")
+	text = regexp.MustCompile("`([^`]+)`").ReplaceAllString(text, "$1")
+	text = strings.NewReplacer("**", "", "__", "", "*", "", "_", "", "~~", "").Replace(text)
+	return documentThumbnailLines(text)
+}
+
+func documentThumbnailLines(source string) []string {
+	source = regexp.MustCompile(`[ \t]+`).ReplaceAllString(source, " ")
+	rawLines := strings.Split(source, "\n")
+	lines := make([]string, 0, 9)
+	for _, raw := range rawLines {
+		raw = strings.TrimSpace(raw)
+		if raw == "" {
+			continue
+		}
+		for _, line := range wrapTextThumbnailLine(raw, 43) {
+			lines = append(lines, line)
+			if len(lines) >= 9 {
+				return lines
+			}
+		}
+	}
+	if len(lines) == 0 {
+		return []string{"Rendered preview is empty."}
+	}
+	return lines
+}
+
+func codeThumbnailLines(source string) []string {
+	rawLines := strings.Split(source, "\n")
+	lines := make([]string, 0, 10)
+	for _, raw := range rawLines {
+		raw = strings.ReplaceAll(raw, "\t", "  ")
+		raw = strings.TrimRight(raw, " ")
+		if strings.TrimSpace(raw) == "" && len(lines) == 0 {
+			continue
+		}
+		if len(raw) > 48 {
+			raw = raw[:45] + "..."
+		}
+		lines = append(lines, raw)
+		if len(lines) >= 10 {
+			break
+		}
+	}
+	if len(lines) == 0 {
+		return []string{"(empty file)"}
+	}
+	return lines
+}
+
+func renderTextThumbnail(name, mode string, lines []string) []byte {
+	canvas := image.NewRGBA(image.Rect(0, 0, 360, 240))
+	drawSolid(canvas, canvas.Bounds(), color.RGBA{R: 0x0b, G: 0x0b, B: 0x16, A: 0xff})
+	drawSolid(canvas, image.Rect(10, 10, 350, 230), color.RGBA{R: 0x17, G: 0x14, B: 0x2d, A: 0xff})
+	drawSolid(canvas, image.Rect(10, 10, 350, 16), color.RGBA{R: 0xa7, G: 0x8b, B: 0xfa, A: 0xff})
+
+	face := basicfont.Face7x13
+	drawThumbText(canvas, face, trimThumbnailText(name, 38), 22, 36, color.RGBA{R: 0xf5, G: 0xf3, B: 0xff, A: 0xff})
+	drawThumbText(canvas, face, mode+" PREVIEW", 22, 55, color.RGBA{R: 0x67, G: 0xe8, B: 0xf9, A: 0xff})
+
+	codePane := image.Rect(22, 72, 338, 210)
+	if mode == "CODE" {
+		drawSolid(canvas, codePane, color.RGBA{R: 0x0f, G: 0x11, B: 0x1a, A: 0xff})
+	} else {
+		drawSolid(canvas, codePane, color.RGBA{R: 0x21, G: 0x1b, B: 0x3e, A: 0xff})
+	}
+
+	y := 91
+	for _, line := range lines {
+		drawThumbText(canvas, face, line, 32, y, color.RGBA{R: 0xf8, G: 0xfa, B: 0xfc, A: 0xff})
+		y += 14
+		if y > 202 {
+			break
+		}
+	}
+
+	var target bytes.Buffer
+	_ = jpeg.Encode(&target, canvas, &jpeg.Options{Quality: 84})
+	return target.Bytes()
+}
+
+func drawSolid(dst *image.RGBA, rect image.Rectangle, c color.Color) {
+	draw.Draw(dst, rect, &image.Uniform{c}, image.Point{}, draw.Src)
+}
+
+func drawThumbText(dst *image.RGBA, face font.Face, text string, x, y int, c color.Color) {
+	d := font.Drawer{
+		Dst:  dst,
+		Src:  image.NewUniform(c),
+		Face: face,
+		Dot:  fixed.P(x, y),
+	}
+	d.DrawString(text)
+}
+
+func wrapTextThumbnailLine(text string, maxChars int) []string {
+	if len(text) <= maxChars {
+		return []string{text}
+	}
+	words := strings.Fields(text)
+	if len(words) == 0 {
+		return []string{text[:maxChars-3] + "..."}
+	}
+	lines := []string{}
+	current := ""
+	for _, word := range words {
+		if current == "" {
+			current = word
+			continue
+		}
+		if len(current)+1+len(word) <= maxChars {
+			current += " " + word
+			continue
+		}
+		lines = append(lines, trimThumbnailText(current, maxChars))
+		current = word
+	}
+	if current != "" {
+		lines = append(lines, trimThumbnailText(current, maxChars))
+	}
+	return lines
+}
+
+func trimThumbnailText(text string, maxChars int) string {
+	if len(text) <= maxChars {
+		return text
+	}
+	if maxChars <= 3 {
+		return text[:maxChars]
+	}
+	return strings.TrimSpace(text[:maxChars-3]) + "..."
+}
+
 func resizeNearest(src image.Image, maxWidth, maxHeight int) *image.RGBA {
 	bounds := src.Bounds()
 	width := bounds.Dx()

backend/libs/jobs/thumbnails_test.go

@@ -4,12 +4,14 @@ import (
 	"bytes"
 	"image"
 	"image/color"
+	"image/jpeg"
 	"image/png"
 	"io"
 	"log/slog"
 	"mime/multipart"
 	"net/http/httptest"
 	"net/textproto"
+	"strings"
 	"testing"
 
 	"warpbox.dev/backend/libs/services"
@@ -46,6 +48,30 @@ func TestGenerateMissingThumbnailsForBox(t *testing.T) {
 	}
 }
 
+func TestCreateTextThumbnailRendersMarkdownAsJPEG(t *testing.T) {
+	data, err := createTextThumbnail(services.File{
+		Name:        "notes.md",
+		ContentType: "text/markdown",
+	}, strings.NewReader("# Meeting notes\n\n```go\nfunc main() {}\n```\n\nA rendered Markdown preview."))
+	if err != nil {
+		t.Fatalf("createTextThumbnail returned error: %v", err)
+	}
+
+	img, err := jpeg.Decode(bytes.NewReader(data))
+	if err != nil {
+		t.Fatalf("jpeg.Decode returned error: %v", err)
+	}
+	if img.Bounds().Dx() != 360 || img.Bounds().Dy() != 240 {
+		t.Fatalf("thumbnail size = %dx%d, want 360x240", img.Bounds().Dx(), img.Bounds().Dy())
+	}
+}
+
+func TestNeedsThumbnailIncludesCodeTextFiles(t *testing.T) {
+	if !needsThumbnail(services.File{Name: "main.go", ContentType: "text/plain"}) {
+		t.Fatalf("Go source file should get a text thumbnail")
+	}
+}
+
 func newThumbnailTestUploadService(t *testing.T) *services.UploadService {
 	t.Helper()
 	service, err := services.NewUploadService(1024*1024, t.TempDir(), "http://example.test", slog.New(slog.NewTextHandler(io.Discard, nil)))

backend/libs/middleware/bans.go

@@ -0,0 +1,64 @@
+package middleware
+
+import (
+	"log/slog"
+	"net/http"
+	"time"
+
+	"warpbox.dev/backend/libs/services"
+)
+
+func Bans(logger *slog.Logger, bans *services.BanService, trustedProxies []string) Middleware {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			ip, ok := services.ClientIPFromContext(r)
+			if !ok {
+				ip = services.ClientIP(r.RemoteAddr, r.Header.Get("X-Forwarded-For"), r.Header.Get("X-Real-IP"), trustedProxies)
+				r = services.WithClientIP(r, ip)
+			}
+			now := time.Now().UTC()
+			protectedProxy := services.IsProtectedProxyIP(ip, trustedProxies)
+
+			if bans != nil && !protectedProxy {
+				if matched, ok, err := bans.Match(ip, now); err != nil {
+					logger.Error("ban match failed", "source", "ban", "severity", "error", "code", 5001, "ip", ip, "error", err.Error())
+				} else if ok {
+					logger.Warn("banned request blocked", "source", "ban", "severity", "warn", "code", 4030, "ip", ip, "ban_id", matched.Ban.ID, "target", matched.Ban.Normalized, "path", r.URL.Path)
+					w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+					w.WriteHeader(http.StatusForbidden)
+					_, _ = w.Write([]byte("forbidden\n"))
+					return
+				}
+
+				settings, err := bans.Settings()
+				if err != nil {
+					logger.Error("ban settings load failed", "source", "ban", "severity", "error", "code", 5004, "ip", ip, "error", err.Error())
+					next.ServeHTTP(w, r)
+					return
+				}
+				if !settings.AutoBanEnabled {
+					next.ServeHTTP(w, r)
+					return
+				}
+				if pattern, err := bans.MaliciousPattern(r.URL.Path); err != nil {
+					logger.Error("malicious path check failed", "source", "ban", "severity", "error", "code", 5002, "ip", ip, "error", err.Error())
+				} else if pattern != "" {
+					if result, err := bans.RecordAbuse(ip, services.AbuseKindMaliciousPath, r.URL.Path, settings.MaliciousPathThreshold, now); err != nil {
+						logger.Error("malicious path event failed", "source", "ban", "severity", "error", "code", 5003, "ip", ip, "path", r.URL.Path, "error", err.Error())
+					} else if result.Enabled {
+						logger.Warn("malicious path requested", "source", "ban", "severity", "warn", "code", 4302, "ip", ip, "path", r.URL.Path, "pattern", pattern, "count", result.Event.Count)
+						if result.Triggered {
+							logger.Warn("ip auto-banned for malicious path", "source", "ban", "severity", "warn", "code", 4303, "ip", ip, "ban_id", result.Ban.ID, "path", r.URL.Path)
+							w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+							w.WriteHeader(http.StatusForbidden)
+							_, _ = w.Write([]byte("forbidden\n"))
+							return
+						}
+					}
+				}
+			}
+
+			next.ServeHTTP(w, r)
+		})
+	}
+}

backend/libs/middleware/bans_test.go

@@ -0,0 +1,168 @@
+package middleware
+
+import (
+	"io"
+	"log/slog"
+	"net/http"
+	"net/http/httptest"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"warpbox.dev/backend/libs/services"
+)
+
+func TestBansMiddlewareBlocksActiveBan(t *testing.T) {
+	bans := newMiddlewareBanService(t)
+	if _, err := bans.CreateManualBan("203.0.113.20", "test", "admin", time.Now().UTC().Add(time.Hour)); err != nil {
+		t.Fatalf("CreateManualBan returned error: %v", err)
+	}
+	handler := Chain(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Fatal("next handler should not be called")
+	}), Bans(slog.New(slog.NewTextHandler(io.Discard, nil)), bans, nil))
+
+	request := httptest.NewRequest(http.MethodGet, "/", nil)
+	request.RemoteAddr = "127.0.0.1:6070"
+	request.Header.Set("X-Forwarded-For", "203.0.113.20")
+	response := httptest.NewRecorder()
+	handler.ServeHTTP(response, request)
+
+	if response.Code != http.StatusForbidden || response.Body.String() != "forbidden\n" {
+		t.Fatalf("blocked response = %d %q", response.Code, response.Body.String())
+	}
+}
+
+func TestBansMiddlewareAllowsNonBannedIP(t *testing.T) {
+	bans := newMiddlewareBanService(t)
+	called := false
+	handler := Chain(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		called = true
+		_, _ = io.WriteString(w, "ok")
+	}), Bans(slog.New(slog.NewTextHandler(io.Discard, nil)), bans, nil))
+
+	request := httptest.NewRequest(http.MethodGet, "/", nil)
+	request.RemoteAddr = "203.0.113.21:6070"
+	response := httptest.NewRecorder()
+	handler.ServeHTTP(response, request)
+
+	if !called || response.Code != http.StatusOK {
+		t.Fatalf("allowed response = called %v code %d", called, response.Code)
+	}
+}
+
+func TestBansMiddlewareAutoBansMaliciousPaths(t *testing.T) {
+	bans := newMiddlewareBanService(t)
+	settings, err := bans.Settings()
+	if err != nil {
+		t.Fatalf("Settings returned error: %v", err)
+	}
+	settings.AutoBanEnabled = true
+	settings.MaliciousPathThreshold = 3
+	if err := bans.UpdateSettings(settings); err != nil {
+		t.Fatalf("UpdateSettings returned error: %v", err)
+	}
+	handler := Chain(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.NotFound(w, r)
+	}), Bans(slog.New(slog.NewTextHandler(io.Discard, nil)), bans, nil))
+
+	for i := 0; i < 3; i++ {
+		request := httptest.NewRequest(http.MethodGet, "/.env", nil)
+		request.RemoteAddr = "203.0.113.22:6070"
+		response := httptest.NewRecorder()
+		handler.ServeHTTP(response, request)
+		if i < 2 && response.Code == http.StatusForbidden {
+			t.Fatalf("request %d blocked before threshold", i+1)
+		}
+		if i == 2 && response.Code != http.StatusForbidden {
+			t.Fatalf("request 3 status = %d, want forbidden", response.Code)
+		}
+	}
+}
+
+func TestBansMiddlewareSkipsAutoBanWhenDisabled(t *testing.T) {
+	bans := newMiddlewareBanService(t)
+	handler := Chain(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.NotFound(w, r)
+	}), Bans(slog.New(slog.NewTextHandler(io.Discard, nil)), bans, nil))
+
+	for i := 0; i < 5; i++ {
+		request := httptest.NewRequest(http.MethodGet, "/.env", nil)
+		request.RemoteAddr = "203.0.113.23:6070"
+		response := httptest.NewRecorder()
+		handler.ServeHTTP(response, request)
+		if response.Code == http.StatusForbidden {
+			t.Fatalf("request %d was blocked while auto-ban disabled", i+1)
+		}
+	}
+	if _, ok, err := bans.Match("203.0.113.23", time.Now().UTC()); err != nil || ok {
+		t.Fatalf("disabled auto-ban Match = %v, %v", ok, err)
+	}
+}
+
+func TestBansMiddlewareDoesNotBlockProtectedProxyIP(t *testing.T) {
+	bans := newMiddlewareBanService(t)
+	if _, err := bans.CreateManualBan("127.0.0.1", "bad historical ban", "admin", time.Now().UTC().Add(time.Hour)); err != nil {
+		t.Fatalf("CreateManualBan returned error: %v", err)
+	}
+	called := false
+	handler := Chain(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		called = true
+		_, _ = io.WriteString(w, "ok")
+	}), Bans(slog.New(slog.NewTextHandler(io.Discard, nil)), bans, []string{"127.0.0.1"}))
+
+	request := httptest.NewRequest(http.MethodGet, "/", nil)
+	request.RemoteAddr = "127.0.0.1:6070"
+	response := httptest.NewRecorder()
+	handler.ServeHTTP(response, request)
+
+	if !called || response.Code != http.StatusOK {
+		t.Fatalf("protected proxy response = called %v code %d", called, response.Code)
+	}
+}
+
+func TestBansMiddlewareDoesNotAutoBanProtectedProxyIP(t *testing.T) {
+	bans := newMiddlewareBanService(t)
+	settings, err := bans.Settings()
+	if err != nil {
+		t.Fatalf("Settings returned error: %v", err)
+	}
+	settings.AutoBanEnabled = true
+	settings.MaliciousPathThreshold = 1
+	if err := bans.UpdateSettings(settings); err != nil {
+		t.Fatalf("UpdateSettings returned error: %v", err)
+	}
+	handler := Chain(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.NotFound(w, r)
+	}), Bans(slog.New(slog.NewTextHandler(io.Discard, nil)), bans, []string{"127.0.0.1"}))
+
+	request := httptest.NewRequest(http.MethodGet, "/.env", nil)
+	request.RemoteAddr = "127.0.0.1:6070"
+	response := httptest.NewRecorder()
+	handler.ServeHTTP(response, request)
+
+	if response.Code == http.StatusForbidden {
+		t.Fatalf("protected proxy was auto-banned")
+	}
+	if _, ok, err := bans.Match("127.0.0.1", time.Now().UTC()); err != nil || ok {
+		t.Fatalf("protected proxy Match = %v, %v", ok, err)
+	}
+}
+
+func newMiddlewareBanService(t *testing.T) *services.BanService {
+	t.Helper()
+	root := t.TempDir()
+	upload, err := services.NewUploadService(1024*1024, filepath.Join(root, "data"), "http://example.test", slog.Default())
+	if err != nil {
+		t.Fatalf("NewUploadService returned error: %v", err)
+	}
+	t.Cleanup(func() {
+		if err := upload.Close(); err != nil {
+			t.Fatalf("Close returned error: %v", err)
+		}
+	})
+	bans, err := services.NewBanService(upload.DB())
+	if err != nil {
+		t.Fatalf("NewBanService returned error: %v", err)
+	}
+	return bans
+}

backend/libs/middleware/client_ip.go

@@ -0,0 +1,16 @@
+package middleware
+
+import (
+	"net/http"
+
+	"warpbox.dev/backend/libs/services"
+)
+
+func ClientIP(trustedProxies []string) Middleware {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			ip := services.ClientIP(r.RemoteAddr, r.Header.Get("X-Forwarded-For"), r.Header.Get("X-Real-IP"), trustedProxies)
+			next.ServeHTTP(w, services.WithClientIP(r, ip))
+		})
+	}
+}

backend/libs/middleware/logger.go

@@ -1,57 +0,0 @@
-package middleware
-
-import (
-	"log/slog"
-	"net/http"
-	"time"
-)
-
-type statusRecorder struct {
-	http.ResponseWriter
-	status int
-	bytes  int
-}
-
-func (r *statusRecorder) WriteHeader(status int) {
-	r.status = status
-	r.ResponseWriter.WriteHeader(status)
-}
-
-func (r *statusRecorder) Write(data []byte) (int, error) {
-	if r.status == 0 {
-		r.status = http.StatusOK
-	}
-	n, err := r.ResponseWriter.Write(data)
-	r.bytes += n
-	return n, err
-}
-
-func Logger(logger *slog.Logger) Middleware {
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			start := time.Now()
-			recorder := &statusRecorder{ResponseWriter: w}
-
-			next.ServeHTTP(recorder, r)
-
-			status := recorder.status
-			if status == 0 {
-				status = http.StatusOK
-			}
-
-			logger.Info("http request",
-				"source", "http",
-				"severity", "dev",
-				"code", status,
-				"method", r.Method,
-				"path", r.URL.Path,
-				"status", status,
-				"bytes", recorder.bytes,
-				"duration_ms", time.Since(start).Milliseconds(),
-				"request_id", RequestIDFromContext(r.Context()),
-				"remote_addr", r.RemoteAddr,
-				"user_agent", r.UserAgent(),
-			)
-		})
-	}
-}

backend/libs/middleware/security.go

@@ -9,7 +9,7 @@ func SecurityHeaders(next http.Handler) http.Handler {
 		header.Set("X-Frame-Options", "DENY")
 		header.Set("Referrer-Policy", "strict-origin-when-cross-origin")
 		header.Set("Permissions-Policy", "camera=(), microphone=(), geolocation=()")
-		header.Set("Content-Security-Policy", "default-src 'self'; img-src 'self' data: blob:; media-src 'self' blob:; font-src 'self'; style-src 'self'; script-src 'self'; base-uri 'self'; frame-ancestors 'none'")
+		header.Set("Content-Security-Policy", "default-src 'self'; img-src 'self' data: blob:; media-src 'self' blob:; font-src 'self'; style-src 'self' 'unsafe-inline'; script-src 'self'; frame-src 'self' about:; base-uri 'self'; frame-ancestors 'none'")
 
 		next.ServeHTTP(w, r)
 	})

backend/libs/services/auth.go

@@ -574,6 +574,38 @@ func (s *AuthService) SetUserStorageBackend(userID, backendID string) error {
 	return s.saveUser(user)
 }
 
+func (s *AuthService) ClearStorageBackendOverrides(backendID string) (int, error) {
+	backendID = strings.TrimSpace(backendID)
+	if backendID == "" {
+		return 0, nil
+	}
+	cleared := 0
+	err := s.db.Update(func(tx *bbolt.Tx) error {
+		users := tx.Bucket(usersBucket)
+		return users.ForEach(func(key, value []byte) error {
+			var user User
+			if err := json.Unmarshal(value, &user); err != nil {
+				return err
+			}
+			if user.Policy.StorageBackendID == nil || *user.Policy.StorageBackendID != backendID {
+				return nil
+			}
+			user.Policy.StorageBackendID = nil
+			user.UpdatedAt = time.Now().UTC()
+			next, err := json.Marshal(user)
+			if err != nil {
+				return err
+			}
+			if err := users.Put(key, next); err != nil {
+				return err
+			}
+			cleared++
+			return nil
+		})
+	})
+	return cleared, err
+}
+
 func (s *AuthService) UpdateUserAdminFields(userID, username, email, role, status string, policy UserPolicy) (User, error) {
 	if err := validateUserPolicy(policy); err != nil {
 		return User{}, err
@@ -862,20 +894,20 @@ func validateUserPolicy(policy UserPolicy) error {
 	if policy.DailyUploadMB != nil && ((*policy.DailyUploadMB < 0 && *policy.DailyUploadMB != -1) || *policy.DailyUploadMB == 0) {
 		return fmt.Errorf("daily upload override must be positive or -1 for unlimited")
 	}
-	if policy.StorageQuotaMB != nil && *policy.StorageQuotaMB < 0 {
+	if policy.StorageQuotaMB != nil && *policy.StorageQuotaMB < 0 && *policy.StorageQuotaMB != -1 {
-		return fmt.Errorf("storage quota override cannot be negative")
+		return fmt.Errorf("storage quota override must be 0/positive or -1 for unlimited")
 	}
-	if policy.MaxDays != nil && *policy.MaxDays <= 0 {
+	if policy.MaxDays != nil && *policy.MaxDays <= 0 && *policy.MaxDays != -1 {
-		return fmt.Errorf("expiration override must be positive")
+		return fmt.Errorf("expiration override must be positive or -1 for unlimited")
 	}
-	if policy.DailyBoxes != nil && *policy.DailyBoxes <= 0 {
+	if policy.DailyBoxes != nil && *policy.DailyBoxes <= 0 && *policy.DailyBoxes != -1 {
-		return fmt.Errorf("daily box override must be positive")
+		return fmt.Errorf("daily box override must be positive or -1 for unlimited")
 	}
-	if policy.ActiveBoxes != nil && *policy.ActiveBoxes <= 0 {
+	if policy.ActiveBoxes != nil && *policy.ActiveBoxes <= 0 && *policy.ActiveBoxes != -1 {
-		return fmt.Errorf("active box override must be positive")
+		return fmt.Errorf("active box override must be positive or -1 for unlimited")
 	}
-	if policy.ShortWindowRequests != nil && *policy.ShortWindowRequests <= 0 {
+	if policy.ShortWindowRequests != nil && *policy.ShortWindowRequests <= 0 && *policy.ShortWindowRequests != -1 {
-		return fmt.Errorf("short-window request override must be positive")
+		return fmt.Errorf("short-window request override must be positive or -1 for unlimited")
 	}
 	return nil
 }

backend/libs/services/bans.go

@@ -0,0 +1,571 @@
+package services
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"sort"
+	"strings"
+	"time"
+
+	"go.etcd.io/bbolt"
+)
+
+var (
+	bansBucket          = []byte("bans")
+	abuseEventsBucket   = []byte("abuse_events")
+	banRulesBucket      = []byte("ban_rules")
+	banSettingsBucket   = []byte("ban_settings")
+	banSettingsKey      = []byte("settings")
+	defaultBanRulesSeed = []byte("default_rules_seeded")
+)
+
+const (
+	BanSourceManual = "manual"
+	BanSourceAuto   = "auto"
+
+	AbuseKindMaliciousPath = "malicious_path"
+	AbuseKindAdminLogin    = "admin_login_failure"
+	AbuseKindUserLogin     = "user_login_failure"
+)
+
+var defaultMaliciousPathRules = []string{
+	"/wp-admin",
+	"/.env",
+	"/.git/config",
+	"/phpmyadmin",
+	"/wp-login.php",
+	"/xmlrpc.php",
+	"/config.php",
+	"/vendor/phpunit",
+	".env",
+	"backup",
+	"dump.sql",
+}
+
+var ErrBanNotFound = errors.New("ban not found")
+
+type BanService struct {
+	db *bbolt.DB
+}
+
+type BanSettings struct {
+	AutoBanEnabled             bool `json:"autoBanEnabled"`
+	AutoBanDurationHours       int  `json:"autoBanDurationHours"`
+	MaliciousPathThreshold     int  `json:"maliciousPathThreshold"`
+	AdminLoginFailureThreshold int  `json:"adminLoginFailureThreshold"`
+	UserLoginFailureThreshold  int  `json:"userLoginFailureThreshold"`
+	AbuseWindowHours           int  `json:"abuseWindowHours"`
+}
+
+type BanRecord struct {
+	ID            string     `json:"id"`
+	Target        string     `json:"target"`
+	Normalized    string     `json:"normalized"`
+	Reason        string     `json:"reason"`
+	Source        string     `json:"source"`
+	CreatedBy     string     `json:"createdBy,omitempty"`
+	CreatedAt     time.Time  `json:"createdAt"`
+	UpdatedAt     time.Time  `json:"updatedAt"`
+	ExpiresAt     time.Time  `json:"expiresAt"`
+	UnbannedAt    *time.Time `json:"unbannedAt,omitempty"`
+	LastMatchedAt *time.Time `json:"lastMatchedAt,omitempty"`
+}
+
+type BanRule struct {
+	ID        string    `json:"id"`
+	Pattern   string    `json:"pattern"`
+	Enabled   bool      `json:"enabled"`
+	CreatedAt time.Time `json:"createdAt"`
+	UpdatedAt time.Time `json:"updatedAt"`
+}
+
+type AbuseEvent struct {
+	Key       string    `json:"key"`
+	IP        string    `json:"ip"`
+	Kind      string    `json:"kind"`
+	Count     int       `json:"count"`
+	FirstSeen time.Time `json:"firstSeen"`
+	LastSeen  time.Time `json:"lastSeen"`
+	Detail    string    `json:"detail,omitempty"`
+}
+
+type MatchedBan struct {
+	Ban BanRecord
+	IP  string
+}
+
+type AbuseResult struct {
+	Event     AbuseEvent
+	Ban       BanRecord
+	Triggered bool
+	Enabled   bool
+}
+
+func NewBanService(db *bbolt.DB) (*BanService, error) {
+	service := &BanService{db: db}
+	err := db.Update(func(tx *bbolt.Tx) error {
+		for _, bucket := range [][]byte{bansBucket, abuseEventsBucket, banRulesBucket, banSettingsBucket} {
+			if _, err := tx.CreateBucketIfNotExists(bucket); err != nil {
+				return err
+			}
+		}
+		if tx.Bucket(banSettingsBucket).Get(banSettingsKey) == nil {
+			data, err := json.Marshal(DefaultBanSettings())
+			if err != nil {
+				return err
+			}
+			if err := tx.Bucket(banSettingsBucket).Put(banSettingsKey, data); err != nil {
+				return err
+			}
+		}
+		rules := tx.Bucket(banRulesBucket)
+		if rules.Get(defaultBanRulesSeed) == nil {
+			now := time.Now().UTC()
+			for _, pattern := range defaultMaliciousPathRules {
+				rule := BanRule{ID: randomID(10), Pattern: pattern, Enabled: true, CreatedAt: now, UpdatedAt: now}
+				data, err := json.Marshal(rule)
+				if err != nil {
+					return err
+				}
+				if err := rules.Put([]byte(rule.ID), data); err != nil {
+					return err
+				}
+			}
+			if err := rules.Put(defaultBanRulesSeed, []byte("1")); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+	return service, err
+}
+
+func DefaultBanSettings() BanSettings {
+	return BanSettings{
+		AutoBanEnabled:             false,
+		AutoBanDurationHours:       24,
+		MaliciousPathThreshold:     3,
+		AdminLoginFailureThreshold: 10,
+		UserLoginFailureThreshold:  30,
+		AbuseWindowHours:           24,
+	}
+}
+
+func (s *BanService) Settings() (BanSettings, error) {
+	settings := DefaultBanSettings()
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		data := tx.Bucket(banSettingsBucket).Get(banSettingsKey)
+		if data == nil {
+			return nil
+		}
+		if err := json.Unmarshal(data, &settings); err != nil {
+			return err
+		}
+		settings = withBanSettingDefaults(settings)
+		return nil
+	})
+	if err != nil {
+		return BanSettings{}, err
+	}
+	return settings, nil
+}
+
+func (s *BanService) UpdateSettings(settings BanSettings) error {
+	settings = withBanSettingDefaults(settings)
+	if settings.AutoBanDurationHours <= 0 || settings.MaliciousPathThreshold <= 0 ||
+		settings.AdminLoginFailureThreshold <= 0 || settings.UserLoginFailureThreshold <= 0 ||
+		settings.AbuseWindowHours <= 0 {
+		return fmt.Errorf("ban settings must be positive")
+	}
+	data, err := json.Marshal(settings)
+	if err != nil {
+		return err
+	}
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		return tx.Bucket(banSettingsBucket).Put(banSettingsKey, data)
+	})
+}
+
+func withBanSettingDefaults(settings BanSettings) BanSettings {
+	defaults := DefaultBanSettings()
+	if settings.AutoBanDurationHours <= 0 {
+		settings.AutoBanDurationHours = defaults.AutoBanDurationHours
+	}
+	if settings.MaliciousPathThreshold <= 0 {
+		settings.MaliciousPathThreshold = defaults.MaliciousPathThreshold
+	}
+	if settings.AdminLoginFailureThreshold <= 0 {
+		settings.AdminLoginFailureThreshold = defaults.AdminLoginFailureThreshold
+	}
+	if settings.UserLoginFailureThreshold <= 0 {
+		settings.UserLoginFailureThreshold = defaults.UserLoginFailureThreshold
+	}
+	if settings.AbuseWindowHours <= 0 {
+		settings.AbuseWindowHours = defaults.AbuseWindowHours
+	}
+	return settings
+}
+
+func (s *BanService) CreateManualBan(target, reason, createdBy string, expiresAt time.Time) (BanRecord, error) {
+	return s.createBan(target, reason, BanSourceManual, createdBy, expiresAt, time.Now().UTC())
+}
+
+func (s *BanService) createBan(target, reason, source, createdBy string, expiresAt, now time.Time) (BanRecord, error) {
+	normalized, err := NormalizeBanTarget(target)
+	if err != nil {
+		return BanRecord{}, err
+	}
+	reason = strings.TrimSpace(reason)
+	if reason == "" {
+		return BanRecord{}, fmt.Errorf("ban reason is required")
+	}
+	if !expiresAt.After(now) {
+		return BanRecord{}, fmt.Errorf("ban expiration must be in the future")
+	}
+	record := BanRecord{
+		ID:         randomID(12),
+		Target:     strings.TrimSpace(target),
+		Normalized: normalized,
+		Reason:     reason,
+		Source:     source,
+		CreatedBy:  createdBy,
+		CreatedAt:  now,
+		UpdatedAt:  now,
+		ExpiresAt:  expiresAt.UTC(),
+	}
+	data, err := json.Marshal(record)
+	if err != nil {
+		return BanRecord{}, err
+	}
+	err = s.db.Update(func(tx *bbolt.Tx) error {
+		return tx.Bucket(bansBucket).Put([]byte(record.ID), data)
+	})
+	return record, err
+}
+
+func NormalizeBanTarget(target string) (string, error) {
+	target = strings.TrimSpace(target)
+	if target == "" {
+		return "", fmt.Errorf("ban target is required")
+	}
+	if strings.Contains(target, "/") {
+		_, network, err := net.ParseCIDR(target)
+		if err != nil {
+			return "", fmt.Errorf("invalid CIDR target")
+		}
+		return network.String(), nil
+	}
+	ip := net.ParseIP(target)
+	if ip == nil {
+		return "", fmt.Errorf("invalid IP target")
+	}
+	return ip.String(), nil
+}
+
+func (s *BanService) ListBans() ([]BanRecord, error) {
+	records := []BanRecord{}
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		return tx.Bucket(bansBucket).ForEach(func(_, value []byte) error {
+			var record BanRecord
+			if err := json.Unmarshal(value, &record); err != nil {
+				return err
+			}
+			records = append(records, record)
+			return nil
+		})
+	})
+	sort.Slice(records, func(i, j int) bool {
+		return records[i].CreatedAt.After(records[j].CreatedAt)
+	})
+	return records, err
+}
+
+func (s *BanService) Unban(id string, now time.Time) error {
+	id = strings.TrimSpace(id)
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(bansBucket)
+		data := bucket.Get([]byte(id))
+		if data == nil {
+			return ErrBanNotFound
+		}
+		var record BanRecord
+		if err := json.Unmarshal(data, &record); err != nil {
+			return err
+		}
+		now = now.UTC()
+		record.UnbannedAt = &now
+		record.UpdatedAt = now
+		next, err := json.Marshal(record)
+		if err != nil {
+			return err
+		}
+		return bucket.Put([]byte(id), next)
+	})
+}
+
+func (s *BanService) Match(ip string, now time.Time) (MatchedBan, bool, error) {
+	parsed := net.ParseIP(strings.TrimSpace(ip))
+	if parsed == nil {
+		return MatchedBan{}, false, nil
+	}
+	now = now.UTC()
+	var matched BanRecord
+	var matchedKey []byte
+	// Read-only scan first: the common case (no match) only takes a concurrent
+	// read transaction, instead of grabbing the single bbolt write lock on every
+	// request that flows through the ban middleware.
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(bansBucket)
+		return bucket.ForEach(func(key, value []byte) error {
+			if matched.ID != "" {
+				return nil
+			}
+			var record BanRecord
+			if err := json.Unmarshal(value, &record); err != nil {
+				return err
+			}
+			if !record.Active(now) || !banTargetMatches(record.Normalized, parsed) {
+				return nil
+			}
+			matched = record
+			matchedKey = append([]byte(nil), key...) // key bytes are only valid within the txn
+			return nil
+		})
+	})
+	if err != nil || matched.ID == "" {
+		return MatchedBan{Ban: matched, IP: ip}, matched.ID != "", err
+	}
+
+	// On a hit, record the match time in a short write transaction.
+	matched.LastMatchedAt = &now
+	matched.UpdatedAt = now
+	_ = s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(bansBucket)
+		data := bucket.Get(matchedKey)
+		if data == nil {
+			return nil
+		}
+		var record BanRecord
+		if err := json.Unmarshal(data, &record); err != nil {
+			return nil
+		}
+		record.LastMatchedAt = &now
+		record.UpdatedAt = now
+		next, err := json.Marshal(record)
+		if err != nil {
+			return nil
+		}
+		return bucket.Put(matchedKey, next)
+	})
+	return MatchedBan{Ban: matched, IP: ip}, true, nil
+}
+
+func (r BanRecord) Active(now time.Time) bool {
+	return r.UnbannedAt == nil && r.ExpiresAt.After(now.UTC())
+}
+
+func (r BanRecord) Status(now time.Time) string {
+	switch {
+	case r.UnbannedAt != nil:
+		return "unbanned"
+	case !r.ExpiresAt.After(now.UTC()):
+		return "expired"
+	default:
+		return "active"
+	}
+}
+
+func banTargetMatches(target string, ip net.IP) bool {
+	if strings.Contains(target, "/") {
+		if _, network, err := net.ParseCIDR(target); err == nil {
+			return network.Contains(ip)
+		}
+		return false
+	}
+	targetIP := net.ParseIP(target)
+	return targetIP != nil && targetIP.Equal(ip)
+}
+
+func (s *BanService) ListRules() ([]BanRule, error) {
+	rules := []BanRule{}
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		return tx.Bucket(banRulesBucket).ForEach(func(key, value []byte) error {
+			if string(key) == string(defaultBanRulesSeed) {
+				return nil
+			}
+			var rule BanRule
+			if err := json.Unmarshal(value, &rule); err != nil {
+				return err
+			}
+			rules = append(rules, rule)
+			return nil
+		})
+	})
+	sort.Slice(rules, func(i, j int) bool {
+		return strings.ToLower(rules[i].Pattern) < strings.ToLower(rules[j].Pattern)
+	})
+	return rules, err
+}
+
+func (s *BanService) SaveRules(patterns []string, now time.Time) error {
+	now = now.UTC()
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(banRulesBucket)
+		deleteKeys := [][]byte{}
+		if err := bucket.ForEach(func(key, _ []byte) error {
+			if string(key) == string(defaultBanRulesSeed) {
+				return nil
+			}
+			deleteKeys = append(deleteKeys, append([]byte(nil), key...))
+			return nil
+		}); err != nil {
+			return err
+		}
+		for _, key := range deleteKeys {
+			if err := bucket.Delete(key); err != nil {
+				return err
+			}
+		}
+		seen := map[string]bool{}
+		for _, pattern := range patterns {
+			pattern = strings.TrimSpace(pattern)
+			if pattern == "" || seen[strings.ToLower(pattern)] {
+				continue
+			}
+			seen[strings.ToLower(pattern)] = true
+			rule := BanRule{ID: randomID(10), Pattern: pattern, Enabled: true, CreatedAt: now, UpdatedAt: now}
+			data, err := json.Marshal(rule)
+			if err != nil {
+				return err
+			}
+			if err := bucket.Put([]byte(rule.ID), data); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
+func (s *BanService) DeleteRule(id string) error {
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		return tx.Bucket(banRulesBucket).Delete([]byte(strings.TrimSpace(id)))
+	})
+}
+
+func (s *BanService) MaliciousPattern(path string) (string, error) {
+	if shouldSkipMaliciousPath(path) {
+		return "", nil
+	}
+	rules, err := s.ListRules()
+	if err != nil {
+		return "", err
+	}
+	lowerPath := strings.ToLower(path)
+	for _, rule := range rules {
+		if rule.Enabled && strings.Contains(lowerPath, strings.ToLower(rule.Pattern)) {
+			return rule.Pattern, nil
+		}
+	}
+	return "", nil
+}
+
+func shouldSkipMaliciousPath(path string) bool {
+	return path == "/health" || strings.HasPrefix(path, "/static/")
+}
+
+func (s *BanService) RecordAbuse(ip, kind, detail string, threshold int, now time.Time) (AbuseResult, error) {
+	settings, err := s.Settings()
+	if err != nil {
+		return AbuseResult{}, err
+	}
+	if !settings.AutoBanEnabled {
+		return AbuseResult{Enabled: false}, nil
+	}
+	if threshold <= 0 {
+		return AbuseResult{Enabled: true}, nil
+	}
+	now = now.UTC()
+	window := time.Duration(settings.AbuseWindowHours) * time.Hour
+	key := abuseKey(ip, kind)
+	var event AbuseEvent
+	var triggered bool
+	var ban BanRecord
+	err = s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(abuseEventsBucket)
+		data := bucket.Get([]byte(key))
+		if data != nil {
+			if err := json.Unmarshal(data, &event); err != nil {
+				return err
+			}
+		}
+		if data == nil || now.Sub(event.FirstSeen) > window {
+			event = AbuseEvent{Key: key, IP: ip, Kind: kind, FirstSeen: now}
+		}
+		event.Count++
+		event.LastSeen = now
+		event.Detail = detail
+		next, err := json.Marshal(event)
+		if err != nil {
+			return err
+		}
+		if err := bucket.Put([]byte(key), next); err != nil {
+			return err
+		}
+		triggered = event.Count >= threshold
+		return nil
+	})
+	if err != nil || !triggered {
+		return AbuseResult{Event: event, Triggered: false, Enabled: true}, err
+	}
+	if matched, ok, err := s.Match(ip, now); err != nil {
+		return AbuseResult{}, err
+	} else if ok {
+		return AbuseResult{Event: event, Ban: matched.Ban, Triggered: true, Enabled: true}, nil
+	}
+	reason := fmt.Sprintf("%s threshold reached: %s", strings.ReplaceAll(kind, "_", " "), detail)
+	ban, err = s.createBan(ip, reason, BanSourceAuto, "", now.Add(time.Duration(settings.AutoBanDurationHours)*time.Hour), now)
+	if err != nil {
+		return AbuseResult{}, err
+	}
+	return AbuseResult{Event: event, Ban: ban, Triggered: true, Enabled: true}, nil
+}
+
+func (s *BanService) CleanupAbuseEvents(now time.Time) (int, error) {
+	settings, err := s.Settings()
+	if err != nil {
+		return 0, err
+	}
+	cutoff := now.UTC().Add(-time.Duration(settings.AbuseWindowHours) * time.Hour)
+	cleaned := 0
+	err = s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(abuseEventsBucket)
+		deleteKeys := [][]byte{}
+		if err := bucket.ForEach(func(key, value []byte) error {
+			var event AbuseEvent
+			if err := json.Unmarshal(value, &event); err != nil {
+				deleteKeys = append(deleteKeys, append([]byte(nil), key...))
+				return nil
+			}
+			if event.LastSeen.Before(cutoff) {
+				deleteKeys = append(deleteKeys, append([]byte(nil), key...))
+			}
+			return nil
+		}); err != nil {
+			return err
+		}
+		for _, key := range deleteKeys {
+			if err := bucket.Delete(key); err != nil {
+				return err
+			}
+			cleaned++
+		}
+		return nil
+	})
+	return cleaned, err
+}
+
+func abuseKey(ip, kind string) string {
+	return kind + ":" + strings.TrimSpace(ip)
+}

backend/libs/services/bans_test.go

@@ -0,0 +1,128 @@
+package services
+
+import (
+	"log/slog"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestBanServiceMatchesIPAndCIDR(t *testing.T) {
+	bans := newTestBanService(t)
+	now := time.Date(2026, 5, 31, 12, 0, 0, 0, time.UTC)
+	ipBan, err := bans.createBan("203.0.113.5", "single IP", BanSourceManual, "test", now.Add(time.Hour), now)
+	if err != nil {
+		t.Fatalf("createBan IP returned error: %v", err)
+	}
+	cidrBan, err := bans.createBan("198.51.100.0/24", "CIDR", BanSourceManual, "test", now.Add(time.Hour), now)
+	if err != nil {
+		t.Fatalf("createBan CIDR returned error: %v", err)
+	}
+
+	if matched, ok, err := bans.Match("203.0.113.5", now); err != nil || !ok || matched.Ban.ID != ipBan.ID {
+		t.Fatalf("Match IP = %+v, %v, %v", matched, ok, err)
+	}
+	if matched, ok, err := bans.Match("198.51.100.42", now); err != nil || !ok || matched.Ban.ID != cidrBan.ID {
+		t.Fatalf("Match CIDR = %+v, %v, %v", matched, ok, err)
+	}
+	if _, ok, err := bans.Match("192.0.2.1", now); err != nil || ok {
+		t.Fatalf("Match unrelated = %v, %v", ok, err)
+	}
+}
+
+func TestBanServiceIgnoresExpiredAndUnbanned(t *testing.T) {
+	bans := newTestBanService(t)
+	now := time.Date(2026, 5, 31, 12, 0, 0, 0, time.UTC)
+	expired, err := bans.createBan("203.0.113.6", "expired", BanSourceManual, "test", now.Add(time.Hour), now)
+	if err != nil {
+		t.Fatalf("createBan expired returned error: %v", err)
+	}
+	if _, ok, err := bans.Match("203.0.113.6", now.Add(2*time.Hour)); err != nil || ok {
+		t.Fatalf("expired Match = %v, %v", ok, err)
+	}
+	active, err := bans.createBan("203.0.113.7", "active", BanSourceManual, "test", now.Add(time.Hour), now)
+	if err != nil {
+		t.Fatalf("createBan active returned error: %v", err)
+	}
+	if err := bans.Unban(active.ID, now.Add(time.Minute)); err != nil {
+		t.Fatalf("Unban returned error: %v", err)
+	}
+	if _, ok, err := bans.Match("203.0.113.7", now.Add(2*time.Minute)); err != nil || ok {
+		t.Fatalf("unbanned Match = %v, %v", ok, err)
+	}
+	if expired.Status(now.Add(2*time.Hour)) != "expired" {
+		t.Fatalf("expired status = %q", expired.Status(now.Add(2*time.Hour)))
+	}
+}
+
+func TestBanServiceAutoBanThresholdsAndDisabled(t *testing.T) {
+	bans := newTestBanService(t)
+	now := time.Date(2026, 5, 31, 12, 0, 0, 0, time.UTC)
+	if result, err := bans.RecordAbuse("203.0.113.8", AbuseKindMaliciousPath, "/.env", 3, now); err != nil || result.Enabled {
+		t.Fatalf("disabled RecordAbuse = %+v, %v", result, err)
+	}
+	settings, err := bans.Settings()
+	if err != nil {
+		t.Fatalf("Settings returned error: %v", err)
+	}
+	settings.AutoBanEnabled = true
+	if err := bans.UpdateSettings(settings); err != nil {
+		t.Fatalf("UpdateSettings returned error: %v", err)
+	}
+	for i := 0; i < 2; i++ {
+		result, err := bans.RecordAbuse("203.0.113.8", AbuseKindMaliciousPath, "/.env", 3, now.Add(time.Duration(i)*time.Minute))
+		if err != nil || result.Triggered {
+			t.Fatalf("RecordAbuse before threshold = %+v, %v", result, err)
+		}
+	}
+	result, err := bans.RecordAbuse("203.0.113.8", AbuseKindMaliciousPath, "/.env", 3, now.Add(3*time.Minute))
+	if err != nil || !result.Triggered || result.Ban.ID == "" {
+		t.Fatalf("RecordAbuse threshold = %+v, %v", result, err)
+	}
+	again, err := bans.RecordAbuse("203.0.113.8", AbuseKindMaliciousPath, "/.env", 3, now.Add(4*time.Minute))
+	if err != nil || !again.Triggered || again.Ban.ID != result.Ban.ID {
+		t.Fatalf("RecordAbuse duplicate = %+v, %v", again, err)
+	}
+	records, err := bans.ListBans()
+	if err != nil {
+		t.Fatalf("ListBans returned error: %v", err)
+	}
+	if len(records) != 1 {
+		t.Fatalf("ban count = %d, want 1", len(records))
+	}
+}
+
+func TestBanServiceMaliciousPathRules(t *testing.T) {
+	bans := newTestBanService(t)
+	if pattern, err := bans.MaliciousPattern("/foo/.ENV"); err != nil || pattern == "" {
+		t.Fatalf("MaliciousPattern .env = %q, %v", pattern, err)
+	}
+	if pattern, err := bans.MaliciousPattern("/static/.env"); err != nil || pattern != "" {
+		t.Fatalf("MaliciousPattern static = %q, %v", pattern, err)
+	}
+	if err := bans.SaveRules([]string{"/custom-probe"}, time.Now().UTC()); err != nil {
+		t.Fatalf("SaveRules returned error: %v", err)
+	}
+	if pattern, err := bans.MaliciousPattern("/x/CUSTOM-probe"); err != nil || pattern != "/custom-probe" {
+		t.Fatalf("MaliciousPattern custom = %q, %v", pattern, err)
+	}
+}
+
+func newTestBanService(t *testing.T) *BanService {
+	t.Helper()
+	root := t.TempDir()
+	upload, err := NewUploadService(1024*1024, filepath.Join(root, "data"), "http://example.test", slog.Default())
+	if err != nil {
+		t.Fatalf("NewUploadService returned error: %v", err)
+	}
+	t.Cleanup(func() {
+		if err := upload.Close(); err != nil {
+			t.Fatalf("Close returned error: %v", err)
+		}
+	})
+	bans, err := NewBanService(upload.DB())
+	if err != nil {
+		t.Fatalf("NewBanService returned error: %v", err)
+	}
+	return bans
+}

backend/libs/services/proxy.go

@@ -0,0 +1,140 @@
+package services
+
+import (
+	"context"
+	"net"
+	"net/http"
+	"strings"
+)
+
+type clientIPContextKey struct{}
+
+func WithClientIP(r *http.Request, ip string) *http.Request {
+	return r.WithContext(context.WithValue(r.Context(), clientIPContextKey{}, ip))
+}
+
+func ClientIPFromContext(r *http.Request) (string, bool) {
+	ip, ok := r.Context().Value(clientIPContextKey{}).(string)
+	return ip, ok && ip != ""
+}
+
+// ClientIP resolves the effective client IP. When trustedProxies is empty,
+// forwarded headers are trusted for easy reverse-proxy/container defaults.
+func ClientIP(remoteAddr, forwardedFor, realIP string, trustedProxies []string) string {
+	remoteIP := IPOnly(remoteAddr)
+	if len(trustedProxies) == 0 || remoteTrusted(remoteIP, trustedProxies) {
+		if ip := firstForwardedIP(forwardedFor); ip != "" {
+			return IPOnly(ip)
+		}
+		if ip := strings.TrimSpace(realIP); ip != "" {
+			return IPOnly(ip)
+		}
+	}
+	return remoteIP
+}
+
+func IPOnly(remoteAddr string) string {
+	host := strings.TrimSpace(remoteAddr)
+	if splitHost, _, err := net.SplitHostPort(remoteAddr); err == nil {
+		host = splitHost
+	}
+	return strings.Trim(host, "[]")
+}
+
+func IsProtectedProxyIP(ip string, trustedProxies []string) bool {
+	parsed := net.ParseIP(IPOnly(ip))
+	if parsed == nil {
+		return false
+	}
+	if parsed.IsLoopback() {
+		return true
+	}
+	return remoteTrusted(parsed.String(), trustedProxies)
+}
+
+func ProtectedBanTarget(target string, trustedProxies []string) bool {
+	normalized, err := NormalizeBanTarget(target)
+	if err != nil {
+		return false
+	}
+	if !strings.Contains(normalized, "/") {
+		return IsProtectedProxyIP(normalized, trustedProxies)
+	}
+	_, targetNet, err := net.ParseCIDR(normalized)
+	if err != nil {
+		return false
+	}
+	if targetNet.Contains(net.ParseIP("127.0.0.1")) || targetNet.Contains(net.ParseIP("::1")) {
+		return true
+	}
+	for _, trusted := range trustedProxies {
+		trusted = strings.TrimSpace(trusted)
+		if trusted == "" {
+			continue
+		}
+		if strings.Contains(trusted, "/") {
+			if _, trustedNet, err := net.ParseCIDR(trusted); err == nil && networksOverlap(targetNet, trustedNet) {
+				return true
+			}
+			continue
+		}
+		if ip := net.ParseIP(IPOnly(trusted)); ip != nil && targetNet.Contains(ip) {
+			return true
+		}
+	}
+	return false
+}
+
+func firstForwardedIP(forwardedFor string) string {
+	var fallback string
+	for _, part := range strings.Split(forwardedFor, ",") {
+		ip := IPOnly(part)
+		if net.ParseIP(ip) == nil {
+			continue
+		}
+		if fallback == "" {
+			fallback = ip
+		}
+		if isExternalIP(ip) {
+			return ip
+		}
+	}
+	return fallback
+}
+
+func remoteTrusted(remoteIP string, trustedProxies []string) bool {
+	parsed := net.ParseIP(remoteIP)
+	if parsed == nil {
+		return false
+	}
+	for _, trusted := range trustedProxies {
+		trusted = strings.TrimSpace(trusted)
+		if trusted == "" {
+			continue
+		}
+		if strings.Contains(trusted, "/") {
+			if _, network, err := net.ParseCIDR(trusted); err == nil && network.Contains(parsed) {
+				return true
+			}
+			continue
+		}
+		if ip := net.ParseIP(trusted); ip != nil && ip.Equal(parsed) {
+			return true
+		}
+	}
+	return false
+}
+
+func isExternalIP(ip string) bool {
+	parsed := net.ParseIP(IPOnly(ip))
+	return parsed != nil &&
+		!parsed.IsLoopback() &&
+		!parsed.IsPrivate() &&
+		!parsed.IsLinkLocalUnicast() &&
+		!parsed.IsLinkLocalMulticast() &&
+		!parsed.IsUnspecified()
+}
+
+func networksOverlap(a, b *net.IPNet) bool {
+	return a.Contains(b.IP) || b.Contains(a.IP)
+}

backend/libs/services/proxy_test.go

@@ -0,0 +1,74 @@
+package services
+
+import "testing"
+
+func TestClientIPTrustsForwardedHeadersByDefault(t *testing.T) {
+	ip := ClientIP("127.0.0.1:6070", "203.0.113.10, 10.0.0.2", "198.51.100.2", nil)
+	if ip != "203.0.113.10" {
+		t.Fatalf("ClientIP = %q, want forwarded IP", ip)
+	}
+}
+
+func TestClientIPUsesTrustedProxyCIDRs(t *testing.T) {
+	trusted := []string{"127.0.0.1", "172.16.0.0/12"}
+	ip := ClientIP("172.20.0.4:6070", "203.0.113.11", "", trusted)
+	if ip != "203.0.113.11" {
+		t.Fatalf("trusted ClientIP = %q", ip)
+	}
+	spoofed := ClientIP("198.51.100.20:6070", "203.0.113.12", "203.0.113.13", trusted)
+	if spoofed != "198.51.100.20" {
+		t.Fatalf("untrusted ClientIP = %q, want remote addr", spoofed)
+	}
+}
+
+func TestClientIPFallsBackToRealIP(t *testing.T) {
+	ip := ClientIP("127.0.0.1:6070", "", "203.0.113.14", nil)
+	if ip != "203.0.113.14" {
+		t.Fatalf("ClientIP = %q, want real IP", ip)
+	}
+}
+
+func TestClientIPStripsPortsFromForwardedHeaders(t *testing.T) {
+	ip := ClientIP("127.0.0.1:6070", "203.0.113.15:49152", "", nil)
+	if ip != "203.0.113.15" {
+		t.Fatalf("ClientIP = %q, want forwarded IP without port", ip)
+	}
+}
+
+func TestClientIPPrefersExternalForwardedAddress(t *testing.T) {
+	ip := ClientIP("127.0.0.1:6070", "172.30.0.1, 198.51.100.30", "", nil)
+	if ip != "198.51.100.30" {
+		t.Fatalf("ClientIP = %q, want public forwarded IP", ip)
+	}
+}
+
+func TestIPOnlyHandlesIPv6HostPort(t *testing.T) {
+	ip := IPOnly("[2001:db8::1]:6070")
+	if ip != "2001:db8::1" {
+		t.Fatalf("IPOnly = %q, want IPv6 address without port", ip)
+	}
+}
+
+func TestProtectedProxyIP(t *testing.T) {
+	trusted := []string{"127.0.0.1", "172.30.0.1", "10.88.0.0/16"}
+	for _, ip := range []string{"127.0.0.1:48122", "172.30.0.1", "10.88.0.12"} {
+		if !IsProtectedProxyIP(ip, trusted) {
+			t.Fatalf("IsProtectedProxyIP(%q) = false, want true", ip)
+		}
+	}
+	if IsProtectedProxyIP("203.0.113.50", trusted) {
+		t.Fatalf("external IP treated as protected")
+	}
+}
+
+func TestProtectedBanTarget(t *testing.T) {
+	trusted := []string{"172.30.0.1", "10.88.0.0/16"}
+	for _, target := range []string{"127.0.0.1", "172.30.0.1", "172.30.0.0/24", "10.88.12.0/24"} {
+		if !ProtectedBanTarget(target, trusted) {
+			t.Fatalf("ProtectedBanTarget(%q) = false, want true", target)
+		}
+	}
+	if ProtectedBanTarget("203.0.113.0/24", trusted) {
+		t.Fatalf("external target treated as protected")
+	}
+}

backend/libs/services/reactions.go

@@ -0,0 +1,166 @@
+package services
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"os"
+	"sort"
+	"strings"
+	"time"
+
+	"go.etcd.io/bbolt"
+)
+
+var reactionsBucket = []byte("file_reactions")
+
+type ReactionService struct {
+	db *bbolt.DB
+}
+
+type FileReaction struct {
+	BoxID       string    `json:"boxId"`
+	FileID      string    `json:"fileId"`
+	EmojiID     string    `json:"emojiId"`
+	VisitorHash string    `json:"visitorHash"`
+	CreatedAt   time.Time `json:"createdAt"`
+}
+
+type ReactionSummary struct {
+	EmojiID string `json:"emojiId"`
+	Count   int    `json:"count"`
+}
+
+func NewReactionService(db *bbolt.DB) (*ReactionService, error) {
+	if err := db.Update(func(tx *bbolt.Tx) error {
+		_, err := tx.CreateBucketIfNotExists(reactionsBucket)
+		return err
+	}); err != nil {
+		return nil, err
+	}
+	return &ReactionService{db: db}, nil
+}
+
+func (s *ReactionService) Add(boxID, fileID, visitorID, emojiID string) ([]ReactionSummary, error) {
+	boxID = strings.TrimSpace(boxID)
+	fileID = strings.TrimSpace(fileID)
+	visitorHash := reactionVisitorHash(visitorID)
+	emojiID = strings.TrimSpace(emojiID)
+	if boxID == "" || fileID == "" || visitorHash == "" || emojiID == "" {
+		return nil, errors.New("missing reaction data")
+	}
+
+	reaction := FileReaction{
+		BoxID:       boxID,
+		FileID:      fileID,
+		EmojiID:     emojiID,
+		VisitorHash: visitorHash,
+		CreatedAt:   time.Now().UTC(),
+	}
+	data, err := json.Marshal(reaction)
+	if err != nil {
+		return nil, err
+	}
+
+	key := reactionKey(boxID, fileID, visitorHash)
+	if err := s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(reactionsBucket)
+		if bucket.Get([]byte(key)) != nil {
+			return os.ErrExist
+		}
+		return bucket.Put([]byte(key), data)
+	}); err != nil {
+		return nil, err
+	}
+	return s.SummaryForFile(boxID, fileID)
+}
+
+func (s *ReactionService) SummaryForBox(boxID, visitorID string) (map[string][]ReactionSummary, map[string]bool, error) {
+	visitorHash := reactionVisitorHash(visitorID)
+	summaries := make(map[string]map[string]int)
+	viewerReacted := make(map[string]bool)
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(reactionsBucket)
+		if bucket == nil {
+			return nil
+		}
+		return bucket.ForEach(func(_, data []byte) error {
+			var reaction FileReaction
+			if err := json.Unmarshal(data, &reaction); err != nil {
+				return err
+			}
+			if reaction.BoxID != boxID {
+				return nil
+			}
+			if summaries[reaction.FileID] == nil {
+				summaries[reaction.FileID] = make(map[string]int)
+			}
+			summaries[reaction.FileID][reaction.EmojiID]++
+			if visitorHash != "" && reaction.VisitorHash == visitorHash {
+				viewerReacted[reaction.FileID] = true
+			}
+			return nil
+		})
+	})
+	if err != nil {
+		return nil, nil, err
+	}
+
+	result := make(map[string][]ReactionSummary, len(summaries))
+	for fileID, counts := range summaries {
+		result[fileID] = reactionCountsToSummaries(counts)
+	}
+	return result, viewerReacted, nil
+}
+
+func (s *ReactionService) SummaryForFile(boxID, fileID string) ([]ReactionSummary, error) {
+	counts := make(map[string]int)
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(reactionsBucket)
+		if bucket == nil {
+			return nil
+		}
+		return bucket.ForEach(func(_, data []byte) error {
+			var reaction FileReaction
+			if err := json.Unmarshal(data, &reaction); err != nil {
+				return err
+			}
+			if reaction.BoxID == boxID && reaction.FileID == fileID {
+				counts[reaction.EmojiID]++
+			}
+			return nil
+		})
+	})
+	if err != nil {
+		return nil, err
+	}
+	return reactionCountsToSummaries(counts), nil
+}
+
+func reactionCountsToSummaries(counts map[string]int) []ReactionSummary {
+	summaries := make([]ReactionSummary, 0, len(counts))
+	for emojiID, count := range counts {
+		summaries = append(summaries, ReactionSummary{EmojiID: emojiID, Count: count})
+	}
+	sort.Slice(summaries, func(i, j int) bool {
+		if summaries[i].Count == summaries[j].Count {
+			return summaries[i].EmojiID < summaries[j].EmojiID
+		}
+		return summaries[i].Count > summaries[j].Count
+	})
+	return summaries
+}
+
+func reactionKey(boxID, fileID, visitorHash string) string {
+	return boxID + "\x00" + fileID + "\x00" + visitorHash
+}
+
+func reactionVisitorHash(visitorID string) string {
+	visitorID = strings.TrimSpace(visitorID)
+	if visitorID == "" {
+		return ""
+	}
+	sum := sha256.Sum256([]byte(visitorID))
+	return hex.EncodeToString(sum[:])
+}

backend/libs/services/resumable.go

@@ -0,0 +1,735 @@
+package services
+
+import (
+	"context"
+	"crypto/sha256"
+	"crypto/subtle"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"go.etcd.io/bbolt"
+)
+
+var resumableUploadsBucket = []byte("resumable_uploads")
+
+const (
+	ResumableStatusUploading  = "uploading"
+	ResumableStatusProcessing = "processing"
+	ResumableStatusCompleted  = "completed"
+	ResumableStatusCancelled  = "cancelled"
+)
+
+type ResumableFileInput struct {
+	Name        string `json:"name"`
+	Size        int64  `json:"size"`
+	ContentType string `json:"contentType"`
+	Fingerprint string `json:"fingerprint,omitempty"`
+}
+
+type ResumableSession struct {
+	ID              string          `json:"id"`
+	Options         UploadOptions   `json:"options"`
+	Files           []ResumableFile `json:"files"`
+	ChunkSize       int64           `json:"chunkSize"`
+	Status          string          `json:"status"`
+	BoxID           string          `json:"boxId,omitempty"`
+	ResumeTokenHash string          `json:"resumeTokenHash,omitempty"`
+	ResumeToken     string          `json:"-"`
+	ChunkRoot       string          `json:"chunkRoot,omitempty"`
+	CreatedAt       time.Time       `json:"createdAt"`
+	UpdatedAt       time.Time       `json:"updatedAt"`
+	ExpiresAt       time.Time       `json:"expiresAt"`
+}
+
+type ResumableFile struct {
+	ID             string `json:"id"`
+	Name           string `json:"name"`
+	Size           int64  `json:"size"`
+	ContentType    string `json:"contentType"`
+	Fingerprint    string `json:"fingerprint,omitempty"`
+	ChunkCount     int    `json:"chunkCount"`
+	UploadedChunks []int  `json:"uploadedChunks"`
+}
+
+func (s *UploadService) ensureResumableBucket() error {
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		_, err := tx.CreateBucketIfNotExists(resumableUploadsBucket)
+		return err
+	})
+}
+
+func (s *UploadService) CreateResumableSession(files []ResumableFileInput, opts UploadOptions, chunkSize int64, retention time.Duration, chunkRoot string) (ResumableSession, error) {
+	if len(files) == 0 {
+		return ResumableSession{}, fmt.Errorf("no files were uploaded")
+	}
+	if chunkSize <= 0 {
+		return ResumableSession{}, fmt.Errorf("chunk size must be positive")
+	}
+	if retention <= 0 {
+		return ResumableSession{}, fmt.Errorf("retention must be positive")
+	}
+	if strings.TrimSpace(opts.Password) != "" {
+		opts.PasswordSalt, opts.PasswordHash = hashPassword(opts.Password)
+		opts.Password = ""
+	}
+	sessionFiles, err := s.resumableFilesFromInput(files, opts, chunkSize, nil)
+	if err != nil {
+		return ResumableSession{}, err
+	}
+	now := time.Now().UTC()
+	resumeToken := randomID(32)
+	sessionID := randomID(12)
+	session := ResumableSession{
+		ID:              sessionID,
+		Options:         opts,
+		Files:           sessionFiles,
+		ChunkSize:       chunkSize,
+		Status:          ResumableStatusUploading,
+		ResumeTokenHash: resumableTokenHash(sessionID, resumeToken),
+		ResumeToken:     resumeToken,
+		ChunkRoot:       strings.TrimSpace(chunkRoot),
+		CreatedAt:       now,
+		UpdatedAt:       now,
+		ExpiresAt:       now.Add(retention),
+	}
+	if err := s.saveResumableSession(session); err != nil {
+		return ResumableSession{}, err
+	}
+	return session, nil
+}
+
+func (s *UploadService) VerifyResumableToken(session ResumableSession, token string) bool {
+	if session.ResumeTokenHash == "" || strings.TrimSpace(token) == "" {
+		return false
+	}
+	hash := resumableTokenHash(session.ID, token)
+	return subtle.ConstantTimeCompare([]byte(hash), []byte(session.ResumeTokenHash)) == 1
+}
+
+func (s *UploadService) AddResumableFiles(sessionID string, files []ResumableFileInput) (ResumableSession, error) {
+	if len(files) == 0 {
+		return s.GetResumableSession(sessionID)
+	}
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return ResumableSession{}, err
+	}
+	if err := resumableSessionWritable(session); err != nil {
+		return ResumableSession{}, err
+	}
+	existing := make(map[string]bool)
+	for _, file := range session.Files {
+		existing[resumableFileKey(file.Name, file.Size, file.Fingerprint)] = true
+	}
+	newFiles, err := s.resumableFilesFromInput(files, session.Options, session.ChunkSize, existing)
+	if err != nil {
+		return ResumableSession{}, err
+	}
+	if len(newFiles) == 0 {
+		return session, nil
+	}
+	session.Files = append(session.Files, newFiles...)
+	session.UpdatedAt = time.Now().UTC()
+	if err := s.saveResumableSession(session); err != nil {
+		return ResumableSession{}, err
+	}
+	return session, nil
+}
+
+func (s *UploadService) GetResumableSession(id string) (ResumableSession, error) {
+	var session ResumableSession
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(resumableUploadsBucket)
+		if bucket == nil {
+			return os.ErrNotExist
+		}
+		data := bucket.Get([]byte(id))
+		if data == nil {
+			return os.ErrNotExist
+		}
+		return json.Unmarshal(data, &session)
+	})
+	if err != nil {
+		return ResumableSession{}, err
+	}
+	return session, nil
+}
+
+func (s *UploadService) PutResumableChunk(ctx context.Context, sessionID, fileID string, index int, body io.Reader) (ResumableSession, error) {
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return ResumableSession{}, err
+	}
+	if err := resumableSessionWritable(session); err != nil {
+		return ResumableSession{}, err
+	}
+	fileIndex := -1
+	for i, file := range session.Files {
+		if file.ID == fileID {
+			fileIndex = i
+			break
+		}
+	}
+	if fileIndex < 0 {
+		return ResumableSession{}, os.ErrNotExist
+	}
+	file := session.Files[fileIndex]
+	if index < 0 || index >= file.ChunkCount {
+		return ResumableSession{}, fmt.Errorf("chunk index is invalid")
+	}
+	expectedSize := expectedChunkSize(file.Size, session.ChunkSize, index)
+	chunkDir := s.resumableFileDirFor(session, file.ID)
+	if err := os.MkdirAll(chunkDir, 0o755); err != nil {
+		return ResumableSession{}, err
+	}
+	chunkPath := s.resumableChunkPathFor(session, file.ID, index)
+	tempPath := chunkPath + ".tmp"
+	target, err := os.OpenFile(tempPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o600)
+	if err != nil {
+		return ResumableSession{}, err
+	}
+	written, copyErr := io.Copy(target, io.LimitReader(body, expectedSize+1))
+	closeErr := target.Close()
+	if copyErr != nil {
+		_ = os.Remove(tempPath)
+		return ResumableSession{}, copyErr
+	}
+	if closeErr != nil {
+		_ = os.Remove(tempPath)
+		return ResumableSession{}, closeErr
+	}
+	if written != expectedSize {
+		_ = os.Remove(tempPath)
+		return ResumableSession{}, fmt.Errorf("chunk size mismatch")
+	}
+	if err := os.Rename(tempPath, chunkPath); err != nil {
+		_ = os.Remove(tempPath)
+		return ResumableSession{}, err
+	}
+	session.Files[fileIndex].UploadedChunks = addChunkIndex(session.Files[fileIndex].UploadedChunks, index)
+	session.UpdatedAt = time.Now().UTC()
+	if err := s.saveResumableSession(session); err != nil {
+		return ResumableSession{}, err
+	}
+	return session, nil
+}
+
+func (s *UploadService) CompleteResumableSession(ctx context.Context, sessionID string) (UploadResult, ResumableSession, error) {
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	if (session.Status == ResumableStatusCompleted || session.Status == ResumableStatusProcessing) && session.BoxID != "" {
+		box, err := s.GetBox(session.BoxID)
+		if err != nil {
+			return UploadResult{}, ResumableSession{}, err
+		}
+		return s.resultForBox(box, ""), session, nil
+	}
+	if err := resumableSessionWritable(session); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	staged, err := s.resumableIncomingFiles(session)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+
+	result, err := s.CreateBoxFromIncomingContext(ctx, staged, session.Options)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	if err := os.RemoveAll(s.resumableSessionDirFor(session)); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	session.Status = ResumableStatusCompleted
+	session.BoxID = result.BoxID
+	session.UpdatedAt = time.Now().UTC()
+	if err := s.saveResumableSession(session); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	return result, session, nil
+}
+
+func (s *UploadService) CreateProcessingBoxFromResumable(sessionID string) (UploadResult, ResumableSession, error) {
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	if (session.Status == ResumableStatusCompleted || session.Status == ResumableStatusProcessing) && session.BoxID != "" {
+		box, err := s.GetBox(session.BoxID)
+		if err != nil {
+			return UploadResult{}, ResumableSession{}, err
+		}
+		return s.resultForBox(box, ""), session, nil
+	}
+	if err := resumableSessionWritable(session); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	if _, err := s.resumableIncomingFiles(session); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+
+	now := time.Now().UTC()
+	expiresAt := now.AddDate(0, 0, 7)
+	if session.Options.ExpiresInMinutes < 0 || session.Options.MaxDays < 0 {
+		expiresAt = now.AddDate(100, 0, 0)
+	} else if session.Options.ExpiresInMinutes > 0 {
+		expiresAt = now.Add(time.Duration(session.Options.ExpiresInMinutes) * time.Minute)
+	} else if session.Options.MaxDays > 0 {
+		expiresAt = now.Add(time.Duration(session.Options.MaxDays) * 24 * time.Hour)
+	}
+
+	box := Box{
+		ID:               randomID(10),
+		OwnerID:          strings.TrimSpace(session.Options.OwnerID),
+		CollectionID:     strings.TrimSpace(session.Options.CollectionID),
+		CreatorIP:        strings.TrimSpace(session.Options.CreatorIP),
+		StorageBackendID: normalizeBackendID(session.Options.StorageBackendID),
+		CreatedAt:        now,
+		ExpiresAt:        expiresAt,
+		MaxDownloads:     session.Options.MaxDownloads,
+		Obfuscate:        session.Options.ObfuscateMetadata && (strings.TrimSpace(session.Options.Password) != "" || strings.TrimSpace(session.Options.PasswordHash) != ""),
+		Files:            make([]File, 0, len(session.Files)),
+	}
+	deleteToken := randomID(32)
+	box.DeleteTokenHash = deleteTokenHash(box.ID, deleteToken)
+	if strings.TrimSpace(session.Options.PasswordHash) != "" {
+		box.PasswordSalt = session.Options.PasswordSalt
+		box.PasswordHash = session.Options.PasswordHash
+	} else if strings.TrimSpace(session.Options.Password) != "" {
+		salt, hash := hashPassword(session.Options.Password)
+		box.PasswordSalt = salt
+		box.PasswordHash = hash
+	}
+
+	for _, incoming := range session.Files {
+		fileID := randomID(8)
+		storedName := "@each@" + fileID + strings.ToLower(filepath.Ext(incoming.Name))
+		objectKey := boxObjectKey(box.ID, storedName)
+		contentType := incoming.ContentType
+		if contentType == "" {
+			contentType = "application/octet-stream"
+		}
+		box.Files = append(box.Files, File{
+			ID:          fileID,
+			Name:        filepath.Base(incoming.Name),
+			StoredName:  storedName,
+			Size:        incoming.Size,
+			ContentType: contentType,
+			PreviewKind: previewKind(contentType),
+			ObjectKey:   objectKey,
+			Processing:  true,
+			UploadedAt:  now,
+		})
+	}
+	if err := s.saveBoxRecord(box); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	session.Status = ResumableStatusProcessing
+	session.BoxID = box.ID
+	session.UpdatedAt = time.Now().UTC()
+	if err := s.saveResumableSession(session); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	return s.resultForBox(box, deleteToken), session, nil
+}
+
+func (s *UploadService) FinalizeProcessingResumableSession(ctx context.Context, sessionID string) (UploadResult, error) {
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return UploadResult{}, err
+	}
+	if session.Status == ResumableStatusCompleted && session.BoxID != "" {
+		box, err := s.GetBox(session.BoxID)
+		if err != nil {
+			return UploadResult{}, err
+		}
+		return s.resultForBox(box, ""), nil
+	}
+	if session.Status != ResumableStatusProcessing || session.BoxID == "" {
+		return UploadResult{}, fmt.Errorf("upload session is not processing")
+	}
+	box, err := s.GetBox(session.BoxID)
+	if err != nil {
+		return UploadResult{}, err
+	}
+	staged, err := s.resumableIncomingFiles(session)
+	if err != nil {
+		return UploadResult{}, err
+	}
+	if len(staged) != len(box.Files) {
+		return UploadResult{}, fmt.Errorf("processing file count mismatch")
+	}
+	backend, err := s.storage.Backend(box.StorageBackendID)
+	if err != nil {
+		return UploadResult{}, err
+	}
+	for i, incoming := range staged {
+		source, err := incoming.Open()
+		if err != nil {
+			return UploadResult{}, err
+		}
+		file := box.Files[i]
+		if err := s.writeUploadedObject(ctx, backend, file.ObjectKey, source, incoming.Size(), 0, incoming.ContentType()); err != nil {
+			source.Close()
+			_ = backend.Delete(context.Background(), file.ObjectKey)
+			box.Files[i].ProcessingError = err.Error()
+			_ = s.saveBoxRecord(box)
+			return UploadResult{}, err
+		}
+		source.Close()
+		box.Files[i].Processing = false
+		box.Files[i].ProcessingError = ""
+		box.Files[i].UploadedAt = time.Now().UTC()
+		if err := s.saveBoxRecord(box); err != nil {
+			return UploadResult{}, err
+		}
+	}
+	if err := s.writeBoxMetadata(box); err != nil {
+		s.logger.Warn("box metadata write failed after resumable processing", "source", "storage", "severity", "warn", "code", 4020, "box_id", box.ID, "error", err.Error())
+	}
+	if err := os.RemoveAll(s.resumableSessionDirFor(session)); err != nil {
+		return UploadResult{}, err
+	}
+	session.Status = ResumableStatusCompleted
+	session.UpdatedAt = time.Now().UTC()
+	if err := s.saveResumableSession(session); err != nil {
+		return UploadResult{}, err
+	}
+	return s.resultForBox(box, ""), nil
+}
+
+func (s *UploadService) CompleteUploadedResumableSession(ctx context.Context, sessionID string) (UploadResult, ResumableSession, error) {
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	if err := resumableSessionWritable(session); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	completeFiles := make([]ResumableFile, 0, len(session.Files))
+	for _, file := range session.Files {
+		if resumableFileComplete(file) {
+			completeFiles = append(completeFiles, file)
+		}
+	}
+	if len(completeFiles) == 0 {
+		return UploadResult{}, ResumableSession{}, fmt.Errorf("no fully uploaded files to finish")
+	}
+	partial := session
+	partial.Files = completeFiles
+	staged, err := s.resumableIncomingFiles(partial)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+
+	result, err := s.CreateBoxFromIncomingContext(ctx, staged, session.Options)
+	if err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	if err := os.RemoveAll(s.resumableSessionDirFor(session)); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	session.Status = ResumableStatusCompleted
+	session.BoxID = result.BoxID
+	session.Files = completeFiles
+	session.UpdatedAt = time.Now().UTC()
+	if err := s.deleteResumableSession(session.ID); err != nil {
+		return UploadResult{}, ResumableSession{}, err
+	}
+	return result, session, nil
+}
+
+func (s *UploadService) CancelResumableSession(sessionID string) error {
+	session, err := s.GetResumableSession(sessionID)
+	if err != nil {
+		return err
+	}
+	if err := os.RemoveAll(s.resumableSessionDirFor(session)); err != nil {
+		return err
+	}
+	return s.deleteResumableSession(session.ID)
+}
+
+func (s *UploadService) CleanupExpiredResumableSessions(now time.Time) (int, error) {
+	candidates := make([]ResumableSession, 0)
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(resumableUploadsBucket)
+		if bucket == nil {
+			return nil
+		}
+		return bucket.ForEach(func(_, value []byte) error {
+			var session ResumableSession
+			if err := json.Unmarshal(value, &session); err != nil {
+				return err
+			}
+			if session.Status == ResumableStatusCompleted ||
+				session.Status == ResumableStatusCancelled ||
+				(session.Status == ResumableStatusUploading && !session.ExpiresAt.After(now)) {
+				candidates = append(candidates, session)
+			}
+			return nil
+		})
+	})
+	if err != nil {
+		return 0, err
+	}
+	for _, session := range candidates {
+		if err := os.RemoveAll(s.resumableSessionDirFor(session)); err != nil {
+			return 0, err
+		}
+	}
+	err = s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(resumableUploadsBucket)
+		if bucket == nil {
+			return nil
+		}
+		for _, session := range candidates {
+			if err := bucket.Delete([]byte(session.ID)); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+	return len(candidates), err
+}
+
+func (s *UploadService) deleteResumableSession(sessionID string) error {
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(resumableUploadsBucket)
+		if bucket == nil {
+			return nil
+		}
+		return bucket.Delete([]byte(sessionID))
+	})
+}
+
+func (s *UploadService) saveResumableSession(session ResumableSession) error {
+	if err := s.ensureResumableBucket(); err != nil {
+		return err
+	}
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		data, err := json.Marshal(session)
+		if err != nil {
+			return err
+		}
+		return tx.Bucket(resumableUploadsBucket).Put([]byte(session.ID), data)
+	})
+}
+
+func (s *UploadService) resumableFilesFromInput(files []ResumableFileInput, opts UploadOptions, chunkSize int64, existing map[string]bool) ([]ResumableFile, error) {
+	sessionFiles := make([]ResumableFile, 0, len(files))
+	for _, file := range files {
+		file.Name = filepath.Base(strings.TrimSpace(file.Name))
+		if file.Name == "." || file.Name == "" {
+			return nil, fmt.Errorf("file name is required")
+		}
+		if file.Size < 0 {
+			return nil, fmt.Errorf("file size is invalid")
+		}
+		fingerprint := strings.TrimSpace(file.Fingerprint)
+		key := resumableFileKey(file.Name, file.Size, fingerprint)
+		if existing != nil && existing[key] {
+			continue
+		}
+		if !opts.SkipSizeLimit {
+			if err := s.ValidateSize(file.Size); err != nil {
+				return nil, err
+			}
+		}
+		chunks := int((file.Size + chunkSize - 1) / chunkSize)
+		if chunks == 0 {
+			chunks = 1
+		}
+		sessionFiles = append(sessionFiles, ResumableFile{
+			ID:          randomID(8),
+			Name:        file.Name,
+			Size:        file.Size,
+			ContentType: strings.TrimSpace(file.ContentType),
+			Fingerprint: fingerprint,
+			ChunkCount:  chunks,
+		})
+		if existing != nil {
+			existing[key] = true
+		}
+	}
+	return sessionFiles, nil
+}
+
+func resumableFileKey(name string, size int64, fingerprint string) string {
+	return strings.TrimSpace(fingerprint) + "|" + filepath.Base(strings.TrimSpace(name)) + "|" + fmt.Sprintf("%d", size)
+}
+
+type resumableIncomingFile struct {
+	service *UploadService
+	session ResumableSession
+	file    ResumableFile
+}
+
+func (f resumableIncomingFile) Name() string {
+	return f.file.Name
+}
+
+func (f resumableIncomingFile) Size() int64 {
+	return f.file.Size
+}
+
+func (f resumableIncomingFile) ContentType() string {
+	return f.file.ContentType
+}
+
+func (f resumableIncomingFile) Open() (io.ReadCloser, error) {
+	return &resumableChunkReader{
+		service: f.service,
+		session: f.session,
+		file:    f.file,
+	}, nil
+}
+
+type resumableChunkReader struct {
+	service *UploadService
+	session ResumableSession
+	file    ResumableFile
+	index   int
+	current *os.File
+}
+
+func (r *resumableChunkReader) Read(p []byte) (int, error) {
+	for {
+		if r.current == nil {
+			if r.index >= r.file.ChunkCount {
+				return 0, io.EOF
+			}
+			chunk, err := os.Open(r.service.resumableChunkPathFor(r.session, r.file.ID, r.index))
+			if err != nil {
+				return 0, err
+			}
+			r.current = chunk
+		}
+		n, err := r.current.Read(p)
+		if err == io.EOF {
+			if closeErr := r.current.Close(); closeErr != nil {
+				r.current = nil
+				return n, closeErr
+			}
+			r.current = nil
+			r.index++
+			if n > 0 {
+				return n, nil
+			}
+			continue
+		}
+		return n, err
+	}
+}
+
+func (r *resumableChunkReader) Close() error {
+	if r.current == nil {
+		return nil
+	}
+	err := r.current.Close()
+	r.current = nil
+	return err
+}
+
+func (s *UploadService) resumableIncomingFiles(session ResumableSession) ([]IncomingFile, error) {
+	staged := make([]IncomingFile, 0, len(session.Files))
+	for _, file := range session.Files {
+		if len(file.UploadedChunks) != file.ChunkCount {
+			return nil, fmt.Errorf("file %s is missing chunks", file.Name)
+		}
+		var written int64
+		for i := 0; i < file.ChunkCount; i++ {
+			info, err := os.Stat(s.resumableChunkPathFor(session, file.ID, i))
+			if err != nil {
+				return nil, fmt.Errorf("file %s is missing chunks", file.Name)
+			}
+			written += info.Size()
+		}
+		if written != file.Size {
+			return nil, fmt.Errorf("chunk size total mismatch")
+		}
+		staged = append(staged, resumableIncomingFile{
+			service: s,
+			session: session,
+			file:    file,
+		})
+	}
+	return staged, nil
+}
+
+func resumableSessionWritable(session ResumableSession) error {
+	if session.Status != ResumableStatusUploading {
+		return fmt.Errorf("upload session is not active")
+	}
+	if !session.ExpiresAt.After(time.Now().UTC()) {
+		return fmt.Errorf("upload session expired")
+	}
+	return nil
+}
+
+func resumableFileComplete(file ResumableFile) bool {
+	return file.ChunkCount > 0 && len(file.UploadedChunks) == file.ChunkCount
+}
+
+func expectedChunkSize(fileSize, chunkSize int64, index int) int64 {
+	offset := int64(index) * chunkSize
+	remaining := fileSize - offset
+	if remaining < 0 {
+		return 0
+	}
+	if remaining > chunkSize {
+		return chunkSize
+	}
+	return remaining
+}
+
+func addChunkIndex(chunks []int, index int) []int {
+	for _, chunk := range chunks {
+		if chunk == index {
+			return chunks
+		}
+	}
+	chunks = append(chunks, index)
+	sort.Ints(chunks)
+	return chunks
+}
+
+func resumableTokenHash(sessionID, token string) string {
+	sum := sha256.Sum256([]byte("warpbox-resumable:" + sessionID + ":" + token))
+	return hex.EncodeToString(sum[:])
+}
+
+func (s *UploadService) resumableSessionDir(sessionID string) string {
+	return filepath.Join(s.dataDir, "tmp", "uploads", sessionID)
+}
+
+func (s *UploadService) resumableSessionDirFor(session ResumableSession) string {
+	if strings.TrimSpace(session.ChunkRoot) != "" {
+		return filepath.Join(session.ChunkRoot, session.ID)
+	}
+	return s.resumableSessionDir(session.ID)
+}
+
+func (s *UploadService) resumableFileDir(sessionID, fileID string) string {
+	return filepath.Join(s.resumableSessionDir(sessionID), fileID)
+}
+
+func (s *UploadService) resumableFileDirFor(session ResumableSession, fileID string) string {
+	return filepath.Join(s.resumableSessionDirFor(session), fileID)
+}
+
+func (s *UploadService) resumableChunkPath(sessionID, fileID string, index int) string {
+	return filepath.Join(s.resumableFileDir(sessionID, fileID), fmt.Sprintf("%06d.part", index))
+}
+
+func (s *UploadService) resumableChunkPathFor(session ResumableSession, fileID string, index int) string {
+	return filepath.Join(s.resumableFileDirFor(session, fileID), fmt.Sprintf("%06d.part", index))
+}

backend/libs/services/settings.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"math"
-	"net"
 	"strconv"
 	"strings"
 	"time"
@@ -38,6 +37,11 @@ type UploadPolicySettings struct {
 	ShortWindowSeconds      int     `json:"shortWindowSeconds"`
 	AnonymousStorageBackend string  `json:"anonymousStorageBackend"`
 	UserStorageBackend      string  `json:"userStorageBackend"`
+	ResumableUploadsEnabled bool    `json:"resumableUploadsEnabled"`
+	ResumableChunkSizeMB    float64 `json:"resumableChunkSizeMb"`
+	ResumableRetentionHours int     `json:"resumableRetentionHours"`
+	ResumableChunkMode      string  `json:"resumableChunkMode"`
+	ResumableChunkPath      string  `json:"resumableChunkPath"`
 }
 
 type UsageRecord struct {
@@ -90,6 +94,11 @@ func NewSettingsService(db *bbolt.DB, defaults config.SettingsDefaults) (*Settin
 			ShortWindowSeconds:      defaults.ShortWindowSeconds,
 			AnonymousStorageBackend: defaults.AnonymousStorageBackend,
 			UserStorageBackend:      defaults.UserStorageBackend,
+			ResumableUploadsEnabled: defaults.ResumableUploadsEnabled,
+			ResumableChunkSizeMB:    defaults.ResumableChunkSizeMB,
+			ResumableRetentionHours: defaults.ResumableRetentionHours,
+			ResumableChunkMode:      defaults.ResumableChunkMode,
+			ResumableChunkPath:      defaults.ResumableChunkPath,
 		},
 	}
 	service.defaults = service.withBuiltinDefaultGaps(service.defaults)
@@ -144,6 +153,15 @@ func (s *SettingsService) withBuiltinDefaultGaps(settings UploadPolicySettings)
 	if strings.TrimSpace(settings.UserStorageBackend) == "" {
 		settings.UserStorageBackend = StorageBackendLocal
 	}
+	if settings.ResumableChunkSizeMB <= 0 {
+		settings.ResumableChunkSizeMB = 8
+	}
+	if settings.ResumableRetentionHours <= 0 {
+		settings.ResumableRetentionHours = 24
+	}
+	if strings.TrimSpace(settings.ResumableChunkMode) == "" {
+		settings.ResumableChunkMode = "same"
+	}
 	return settings
 }
 
@@ -157,6 +175,13 @@ func (s *SettingsService) UploadPolicy() (UploadPolicySettings, error) {
 		if err := json.Unmarshal(data, &settings); err != nil {
 			return err
 		}
+		var raw map[string]json.RawMessage
+		if err := json.Unmarshal(data, &raw); err != nil {
+			return err
+		}
+		if _, ok := raw["resumableUploadsEnabled"]; !ok {
+			settings.ResumableUploadsEnabled = s.defaults.ResumableUploadsEnabled
+		}
 		settings = s.withDefaultGaps(settings)
 		return nil
 	})
@@ -218,6 +243,15 @@ func (s *SettingsService) withDefaultGaps(settings UploadPolicySettings) UploadP
 	if strings.TrimSpace(settings.UserStorageBackend) == "" {
 		settings.UserStorageBackend = s.defaults.UserStorageBackend
 	}
+	if settings.ResumableChunkSizeMB <= 0 {
+		settings.ResumableChunkSizeMB = s.defaults.ResumableChunkSizeMB
+	}
+	if settings.ResumableRetentionHours <= 0 {
+		settings.ResumableRetentionHours = s.defaults.ResumableRetentionHours
+	}
+	if strings.TrimSpace(settings.ResumableChunkMode) == "" {
+		settings.ResumableChunkMode = s.defaults.ResumableChunkMode
+	}
 	return settings
 }
 
@@ -234,6 +268,29 @@ func (s *SettingsService) UpdateUploadPolicy(settings UploadPolicySettings) erro
 	})
 }
 
+func (s *SettingsService) ResetStorageBackend(backendID string) (bool, bool, error) {
+	backendID = strings.TrimSpace(backendID)
+	if backendID == "" || backendID == StorageBackendLocal {
+		return false, false, nil
+	}
+	settings, err := s.UploadPolicy()
+	if err != nil {
+		return false, false, err
+	}
+	resetAnonymous := settings.AnonymousStorageBackend == backendID
+	resetUser := settings.UserStorageBackend == backendID
+	if !resetAnonymous && !resetUser {
+		return false, false, nil
+	}
+	if resetAnonymous {
+		settings.AnonymousStorageBackend = StorageBackendLocal
+	}
+	if resetUser {
+		settings.UserStorageBackend = StorageBackendLocal
+	}
+	return resetAnonymous, resetUser, s.UpdateUploadPolicy(settings)
+}
+
 func (s *SettingsService) Usage(subjectType, subject string, now time.Time) (UsageRecord, error) {
 	key := usageKey(subjectType, subject, now)
 	var record UsageRecord
@@ -400,6 +457,18 @@ func (s *SettingsService) validate(settings UploadPolicySettings) error {
 	if settings.ShortWindowRequests <= 0 || settings.ShortWindowSeconds <= 0 {
 		return fmt.Errorf("short-window rate limits must be positive")
 	}
+	if settings.ResumableChunkSizeMB <= 0 {
+		return fmt.Errorf("resumable chunk size must be positive")
+	}
+	if settings.ResumableRetentionHours <= 0 {
+		return fmt.Errorf("resumable retention must be positive")
+	}
+	if settings.ResumableChunkMode != "same" && settings.ResumableChunkMode != "custom" {
+		return fmt.Errorf("resumable chunk storage mode is invalid")
+	}
+	if settings.ResumableChunkMode == "custom" && strings.TrimSpace(settings.ResumableChunkPath) == "" {
+		return fmt.Errorf("custom resumable chunk path is required")
+	}
 	return nil
 }
 
@@ -484,19 +553,3 @@ func normalizeBackendID(id string) string {
 	}
 	return id
 }
-
-func ClientIP(remoteAddr, forwardedFor string) string {
-	if forwardedFor != "" {
-		parts := strings.Split(forwardedFor, ",")
-		if ip := strings.TrimSpace(parts[0]); ip != "" {
-			return ip
-		}
-	}
-	host := remoteAddr
-	if strings.Contains(remoteAddr, ":") {
-		if splitHost, _, err := net.SplitHostPort(remoteAddr); err == nil {
-			host = splitHost
-		}
-	}
-	return host
-}

backend/libs/services/storage.go

@@ -86,6 +86,7 @@ type StorageBackendView struct {
 	UsageBytes   int64
 	UsageLabel   string
 	InUse        bool
+	InUseReason  string
 	SpeedTests   []StorageSpeedTest
 	CanSpeedTest bool
 }
@@ -132,6 +133,14 @@ func (s *StorageService) Backend(id string) (StorageBackend, error) {
 	return s.backendFromConfig(cfg)
 }
 
+func (s *StorageService) BackendForMaintenance(id string) (StorageBackend, error) {
+	cfg, err := s.BackendConfig(id)
+	if err != nil {
+		return nil, err
+	}
+	return s.backendFromConfig(cfg)
+}
+
 func (s *StorageService) BackendConfig(id string) (StorageBackendConfig, error) {
 	id = strings.TrimSpace(id)
 	if id == "" || id == StorageBackendLocal {
@@ -340,21 +349,6 @@ func (s *StorageService) SaveBackendConfig(cfg StorageBackendConfig) error {
 	})
 }
 
-func (s *StorageService) DisableBackend(id string, inUse bool) error {
-	if id == "" || id == StorageBackendLocal {
-		return fmt.Errorf("local storage cannot be disabled")
-	}
-	if inUse {
-		return fmt.Errorf("storage backend is in use")
-	}
-	cfg, err := s.BackendConfig(id)
-	if err != nil {
-		return err
-	}
-	cfg.Enabled = false
-	return s.SaveBackendConfig(cfg)
-}
-
 func (s *StorageService) DeleteBackend(id string, inUse bool) error {
 	if id == "" || id == StorageBackendLocal {
 		return fmt.Errorf("local storage cannot be deleted")

backend/libs/services/upload.go

@@ -42,6 +42,8 @@ type UploadOptions struct {
 	ExpiresInMinutes  int
 	MaxDownloads      int
 	Password          string
+	PasswordSalt      string
+	PasswordHash      string
 	ObfuscateMetadata bool
 	OwnerID           string
 	CollectionID      string
@@ -50,6 +52,56 @@ type UploadOptions struct {
 	StorageBackendID  string
 }
 
+type IncomingFile interface {
+	Name() string
+	Size() int64
+	ContentType() string
+	Open() (io.ReadCloser, error)
+}
+
+type multipartIncomingFile struct {
+	header *multipart.FileHeader
+}
+
+func (f multipartIncomingFile) Name() string {
+	return f.header.Filename
+}
+
+func (f multipartIncomingFile) Size() int64 {
+	return f.header.Size
+}
+
+func (f multipartIncomingFile) ContentType() string {
+	return f.header.Header.Get("Content-Type")
+}
+
+func (f multipartIncomingFile) Open() (io.ReadCloser, error) {
+	return f.header.Open()
+}
+
+type StagedUploadFile struct {
+	Filename string
+	FileSize int64
+	MIMEType string
+	Path     string
+}
+
+func (f StagedUploadFile) Name() string {
+	return f.Filename
+}
+
+func (f StagedUploadFile) Size() int64 {
+	return f.FileSize
+}
+
+func (f StagedUploadFile) ContentType() string {
+	return f.MIMEType
+}
+
+func (f StagedUploadFile) Open() (io.ReadCloser, error) {
+	return os.Open(f.Path)
+}
+
 type Box struct {
 	ID               string    `json:"id"`
 	OwnerID          string    `json:"ownerId,omitempty"`
@@ -78,24 +130,29 @@ type File struct {
 	Thumbnail          string    `json:"thumbnail,omitempty"`
 	ObjectKey          string    `json:"objectKey,omitempty"`
 	ThumbnailObjectKey string    `json:"thumbnailObjectKey,omitempty"`
+	Processing         bool      `json:"processing,omitempty"`
+	ProcessingError    string    `json:"processingError,omitempty"`
 	UploadedAt         time.Time `json:"uploadedAt"`
 }
 
 type UploadResult struct {
-	BoxID     string       `json:"boxId"`
+	BoxID        string       `json:"boxId"`
-	BoxURL    string       `json:"boxUrl"`
+	BoxURL       string       `json:"boxUrl"`
-	ZipURL    string       `json:"zipUrl"`
+	ZipURL       string       `json:"zipUrl"`
-	ManageURL string       `json:"manageUrl"`
+	ThumbnailURL string       `json:"thumbnailUrl"`
-	DeleteURL string       `json:"deleteUrl"`
+	ManageURL    string       `json:"manageUrl"`
-	ExpiresAt string       `json:"expiresAt"`
+	DeleteURL    string       `json:"deleteUrl"`
-	Files     []ResultFile `json:"files"`
+	ExpiresAt    string       `json:"expiresAt"`
+	Files        []ResultFile `json:"files"`
 }
 
 type ResultFile struct {
-	ID   string `json:"id"`
+	ID           string `json:"id"`
-	Name string `json:"name"`
+	Name         string `json:"name"`
-	Size string `json:"size"`
+	Size         string `json:"size"`
-	URL  string `json:"url"`
+	URL          string `json:"url"`
+	ThumbnailURL string `json:"thumbnailUrl"`
+	Processing   bool   `json:"processing,omitempty"`
 }
 
 type AdminStats struct {
@@ -135,6 +192,9 @@ func NewUploadService(maxUploadSize int64, dataDir, baseURL string, logger *slog
 	if err := os.MkdirAll(dbDir, 0o755); err != nil {
 		return nil, err
 	}
+	if err := os.MkdirAll(filepath.Join(dataDir, "emoji"), 0o755); err != nil {
+		return nil, err
+	}
 
 	db, err := bbolt.Open(filepath.Join(dbDir, "warpbox.bbolt"), 0o600, &bbolt.Options{Timeout: time.Second})
 	if err != nil {
@@ -193,17 +253,32 @@ func (s *UploadService) ValidateSize(size int64) error {
 }
 
 func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOptions) (UploadResult, error) {
+	return s.CreateBoxFromIncoming(multipartIncomingFiles(files), opts)
+}
+
+func (s *UploadService) CreateBoxFromIncoming(files []IncomingFile, opts UploadOptions) (UploadResult, error) {
+	return s.CreateBoxFromIncomingContext(context.Background(), files, opts)
+}
+
+func (s *UploadService) CreateBoxFromIncomingContext(ctx context.Context, files []IncomingFile, opts UploadOptions) (UploadResult, error) {
 	if len(files) == 0 {
 		return UploadResult{}, fmt.Errorf("no files were uploaded")
 	}
-	if opts.MaxDays <= 0 {
-		opts.MaxDays = 7
-	}
-
 	now := time.Now().UTC()
-	expiresAt := now.Add(time.Duration(opts.MaxDays) * 24 * time.Hour)
+	var expiresAt time.Time
-	if opts.ExpiresInMinutes > 0 {
+	switch {
+	case opts.ExpiresInMinutes < 0 || opts.MaxDays < 0:
+		// "Forever" — a date far enough out that the box effectively never
+		// expires. No schema change; CanDownload/cleanup keep working as-is.
+		expiresAt = now.AddDate(100, 0, 0)
+	case opts.ExpiresInMinutes > 0:
 		expiresAt = now.Add(time.Duration(opts.ExpiresInMinutes) * time.Minute)
+	default:
+		days := opts.MaxDays
+		if days <= 0 {
+			days = 7
+		}
+		expiresAt = now.Add(time.Duration(days) * 24 * time.Hour)
 	}
 
 	box := Box{
@@ -220,65 +295,19 @@ func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOpti
 	}
 	deleteToken := randomID(32)
 	box.DeleteTokenHash = deleteTokenHash(box.ID, deleteToken)
-	if strings.TrimSpace(opts.Password) != "" {
+	if strings.TrimSpace(opts.PasswordHash) != "" {
+		box.PasswordSalt = opts.PasswordSalt
+		box.PasswordHash = opts.PasswordHash
+	} else if strings.TrimSpace(opts.Password) != "" {
 		salt, hash := hashPassword(opts.Password)
 		box.PasswordSalt = salt
 		box.PasswordHash = hash
 	}
 
-	backend, err := s.storage.Backend(box.StorageBackendID)
+	if err := s.writeIncomingFilesToBox(ctx, &box, files, opts); err != nil {
-	if err != nil {
 		return UploadResult{}, err
 	}
 
-	for _, header := range files {
-		if !opts.SkipSizeLimit {
-			if err := s.ValidateSize(header.Size); err != nil {
-				return UploadResult{}, err
-			}
-		}
-
-		maxSize := s.maxUploadSize
-		if opts.SkipSizeLimit {
-			maxSize = 0
-		}
-
-		file, err := header.Open()
-		if err != nil {
-			return UploadResult{}, err
-		}
-
-		fileID := randomID(8)
-		storedName := "@each@" + fileID + strings.ToLower(filepath.Ext(header.Filename))
-		objectKey := boxObjectKey(box.ID, storedName)
-		contentType := header.Header.Get("Content-Type")
-		if contentType == "" {
-			buffer := make([]byte, 512)
-			n, _ := file.Read(buffer)
-			contentType = http.DetectContentType(buffer[:n])
-			if seeker, ok := file.(io.Seeker); ok {
-				_, _ = seeker.Seek(0, io.SeekStart)
-			}
-		}
-
-		if err := s.writeUploadedObject(context.Background(), backend, objectKey, file, header.Size, maxSize, contentType); err != nil {
-			file.Close()
-			return UploadResult{}, err
-		}
-		file.Close()
-
-		box.Files = append(box.Files, File{
-			ID:          fileID,
-			Name:        filepath.Base(header.Filename),
-			StoredName:  storedName,
-			Size:        header.Size,
-			ContentType: contentType,
-			PreviewKind: previewKind(contentType),
-			ObjectKey:   objectKey,
-			UploadedAt:  time.Now().UTC(),
-		})
-	}
-
 	if err := s.SaveBox(box); err != nil {
 		return UploadResult{}, err
 	}
@@ -294,6 +323,110 @@ func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOpti
 	return s.resultForBox(box, deleteToken), nil
 }
 
+// AppendFiles adds files to an existing box (used to group a ShareX multi-file
+// selection into a single box). The box keeps its original expiry, password and
+// other settings; only the new files are written.
+func (s *UploadService) AppendFiles(boxID string, files []*multipart.FileHeader, opts UploadOptions) (UploadResult, error) {
+	return s.AppendIncomingFiles(boxID, multipartIncomingFiles(files), opts)
+}
+
+func (s *UploadService) AppendIncomingFiles(boxID string, files []IncomingFile, opts UploadOptions) (UploadResult, error) {
+	if len(files) == 0 {
+		return UploadResult{}, fmt.Errorf("no files were uploaded")
+	}
+	box, err := s.GetBox(boxID)
+	if err != nil {
+		return UploadResult{}, err
+	}
+	if err := s.writeIncomingFilesToBox(context.Background(), &box, files, opts); err != nil {
+		return UploadResult{}, err
+	}
+	if err := s.SaveBox(box); err != nil {
+		return UploadResult{}, err
+	}
+	s.logger.Info("upload appended",
+		"source", "user-upload",
+		"severity", "user_activity",
+		"code", 2001,
+		"box_id", box.ID,
+		"added", len(files),
+		"file_count", len(box.Files),
+	)
+	return s.resultForBox(box, ""), nil
+}
+
+// writeFilesToBox streams each uploaded file into the box's storage backend and
+// appends the file metadata to box.Files. The box's StorageBackendID determines
+// where files land, so it works for both new and existing boxes.
+func (s *UploadService) writeFilesToBox(box *Box, files []*multipart.FileHeader, opts UploadOptions) error {
+	return s.writeIncomingFilesToBox(context.Background(), box, multipartIncomingFiles(files), opts)
+}
+
+func multipartIncomingFiles(files []*multipart.FileHeader) []IncomingFile {
+	incoming := make([]IncomingFile, 0, len(files))
+	for _, file := range files {
+		incoming = append(incoming, multipartIncomingFile{header: file})
+	}
+	return incoming
+}
+
+func (s *UploadService) writeIncomingFilesToBox(ctx context.Context, box *Box, files []IncomingFile, opts UploadOptions) error {
+	backend, err := s.storage.Backend(box.StorageBackendID)
+	if err != nil {
+		return err
+	}
+
+	for _, incoming := range files {
+		if !opts.SkipSizeLimit {
+			if err := s.ValidateSize(incoming.Size()); err != nil {
+				return err
+			}
+		}
+
+		maxSize := s.maxUploadSize
+		if opts.SkipSizeLimit {
+			maxSize = 0
+		}
+
+		file, err := incoming.Open()
+		if err != nil {
+			return err
+		}
+
+		fileID := randomID(8)
+		storedName := "@each@" + fileID + strings.ToLower(filepath.Ext(incoming.Name()))
+		objectKey := boxObjectKey(box.ID, storedName)
+		contentType := incoming.ContentType()
+		if contentType == "" {
+			buffer := make([]byte, 512)
+			n, _ := file.Read(buffer)
+			contentType = http.DetectContentType(buffer[:n])
+			if seeker, ok := file.(io.Seeker); ok {
+				_, _ = seeker.Seek(0, io.SeekStart)
+			}
+		}
+
+		if err := s.writeUploadedObject(ctx, backend, objectKey, file, incoming.Size(), maxSize, contentType); err != nil {
+			file.Close()
+			_ = backend.Delete(context.Background(), objectKey)
+			return err
+		}
+		file.Close()
+
+		box.Files = append(box.Files, File{
+			ID:          fileID,
+			Name:        filepath.Base(incoming.Name()),
+			StoredName:  storedName,
+			Size:        incoming.Size(),
+			ContentType: contentType,
+			PreviewKind: previewKind(contentType),
+			ObjectKey:   objectKey,
+			UploadedAt:  time.Now().UTC(),
+		})
+	}
+	return nil
+}
+
 func (s *UploadService) GetBox(id string) (Box, error) {
 	var box Box
 	err := s.db.View(func(tx *bbolt.Tx) error {
@@ -506,6 +639,28 @@ func (s *UploadService) DeleteBox(boxID string) error {
 	return s.DeleteBoxWithSource(boxID, "admin")
 }
 
+func (s *UploadService) DeleteBoxesForStorageBackend(backendID, source string) (int, error) {
+	backendID = normalizeBackendID(backendID)
+	if backendID == StorageBackendLocal {
+		return 0, fmt.Errorf("local storage cannot be deleted")
+	}
+	boxes, err := s.ListBoxes(0)
+	if err != nil {
+		return 0, err
+	}
+	deleted := 0
+	for _, box := range boxes {
+		if s.BoxStorageBackendID(box) != backendID {
+			continue
+		}
+		if err := s.DeleteBoxWithSource(box.ID, source); err != nil {
+			return deleted, err
+		}
+		deleted++
+	}
+	return deleted, nil
+}
+
 func (s *UploadService) DeleteBoxWithToken(boxID, token string) error {
 	box, err := s.GetBox(boxID)
 	if err != nil {
@@ -525,7 +680,12 @@ func (s *UploadService) DeleteBoxWithSource(boxID, source string) error {
 		return err
 	}
 	if box.ID != "" {
-		if backend, err := s.storage.Backend(s.BoxStorageBackendID(box)); err == nil {
+		backendID := s.BoxStorageBackendID(box)
+		backend, err := s.storage.Backend(backendID)
+		if err != nil {
+			backend, err = s.storage.BackendForMaintenance(backendID)
+		}
+		if err == nil {
 			if err := backend.DeletePrefix(context.Background(), box.ID); err != nil {
 				return err
 			}
@@ -539,6 +699,80 @@ func (s *UploadService) DeleteBoxWithSource(boxID, source string) error {
 	return nil
 }
 
+// RemoveFileFromBox deletes a single file's stored objects (and thumbnail) and
+// removes it from the box. If it was the box's last file, the whole box is
+// deleted. Returns whether the box itself was removed.
+func (s *UploadService) RemoveFileFromBox(boxID, fileID string) (bool, error) {
+	box, err := s.GetBox(boxID)
+	if err != nil {
+		return false, err
+	}
+	index := -1
+	for i, file := range box.Files {
+		if file.ID == fileID {
+			index = i
+			break
+		}
+	}
+	if index < 0 {
+		return false, os.ErrNotExist
+	}
+	file := box.Files[index]
+
+	backendID := s.BoxStorageBackendID(box)
+	backend, err := s.storage.Backend(backendID)
+	if err != nil {
+		backend, err = s.storage.BackendForMaintenance(backendID)
+	}
+	if err == nil {
+		if key := s.FileObjectKey(box, file); key != "" {
+			_ = backend.Delete(context.Background(), key)
+		}
+		if key := s.ThumbnailObjectKey(box, file); key != "" {
+			_ = backend.Delete(context.Background(), key)
+		}
+	}
+
+	box.Files = append(box.Files[:index], box.Files[index+1:]...)
+	if len(box.Files) == 0 {
+		if err := s.DeleteBoxWithSource(box.ID, "admin"); err != nil {
+			return false, err
+		}
+		return true, nil
+	}
+	if err := s.SaveBox(box); err != nil {
+		return false, err
+	}
+	s.logger.Info("admin removed file", "source", "admin", "severity", "user_activity", "code", 2305, "box_id", box.ID, "file_id", fileID)
+	return false, nil
+}
+
+// AdminUpdateBox lets an admin change a box's expiry, download limit, and
+// optionally clear password protection.
+func (s *UploadService) AdminUpdateBox(boxID string, expiresAt time.Time, maxDownloads int, removePassword bool) error {
+	box, err := s.GetBox(boxID)
+	if err != nil {
+		return err
+	}
+	if !expiresAt.IsZero() {
+		box.ExpiresAt = expiresAt.UTC()
+	}
+	if maxDownloads < 0 {
+		maxDownloads = 0
+	}
+	box.MaxDownloads = maxDownloads
+	if removePassword {
+		box.PasswordHash = ""
+		box.PasswordSalt = ""
+		box.Obfuscate = false
+	}
+	if err := s.SaveBox(box); err != nil {
+		return err
+	}
+	s.logger.Info("admin updated box", "source", "admin", "severity", "user_activity", "code", 2306, "box_id", box.ID)
+	return nil
+}
+
 func (s *UploadService) FindFile(box Box, fileID string) (File, error) {
 	for _, file := range box.Files {
 		if file.ID == fileID {
@@ -585,6 +819,9 @@ func (s *UploadService) ThumbnailObjectKey(box Box, file File) string {
 }
 
 func (s *UploadService) OpenFileObject(ctx context.Context, box Box, file File) (StorageObject, error) {
+	if file.Processing {
+		return StorageObject{}, fmt.Errorf("file is still processing")
+	}
 	backend, err := s.storage.Backend(s.BoxStorageBackendID(box))
 	if err != nil {
 		return StorageObject{}, err
@@ -706,6 +943,13 @@ func (s *UploadService) WriteZip(w io.Writer, box Box) error {
 }
 
 func (s *UploadService) SaveBox(box Box) error {
+	if err := s.saveBoxRecord(box); err != nil {
+		return err
+	}
+	return s.writeBoxMetadata(box)
+}
+
+func (s *UploadService) saveBoxRecord(box Box) error {
 	if box.StorageBackendID == "" {
 		box.StorageBackendID = StorageBackendLocal
 	}
@@ -715,10 +959,7 @@ func (s *UploadService) SaveBox(box Box) error {
 	}
 
 	return s.db.Update(func(tx *bbolt.Tx) error {
-		if err := tx.Bucket(boxesBucket).Put([]byte(box.ID), data); err != nil {
+		return tx.Bucket(boxesBucket).Put([]byte(box.ID), data)
-			return err
-		}
-		return s.writeBoxMetadata(box)
 	})
 }
 
@@ -726,19 +967,29 @@ func (s *UploadService) resultForBox(box Box, deleteToken string) UploadResult {
 	files := make([]ResultFile, 0, len(box.Files))
 	for _, file := range box.Files {
 		files = append(files, ResultFile{
-			ID:   file.ID,
+			ID:           file.ID,
-			Name: file.Name,
+			Name:         file.Name,
-			Size: helpers.FormatBytes(file.Size),
+			Size:         helpers.FormatBytes(file.Size),
-			URL:  fmt.Sprintf("%s/d/%s/f/%s", s.baseURL, box.ID, file.ID),
+			URL:          fmt.Sprintf("%s/d/%s/f/%s", s.baseURL, box.ID, file.ID),
+			ThumbnailURL: fmt.Sprintf("%s/d/%s/thumb/%s", s.baseURL, box.ID, file.ID),
+			Processing:   file.Processing,
 		})
 	}
 
+	// The box-level thumbnail points at the most recently added file, so a
+	// per-file ShareX upload previews the file it just sent.
+	thumbnailURL := fmt.Sprintf("%s/d/%s/og-image.jpg", s.baseURL, box.ID)
+	if len(files) > 0 {
+		thumbnailURL = files[len(files)-1].ThumbnailURL
+	}
+
 	result := UploadResult{
-		BoxID:     box.ID,
+		BoxID:        box.ID,
-		BoxURL:    fmt.Sprintf("%s/d/%s", s.baseURL, box.ID),
+		BoxURL:       fmt.Sprintf("%s/d/%s", s.baseURL, box.ID),
-		ZipURL:    fmt.Sprintf("%s/d/%s/zip", s.baseURL, box.ID),
+		ZipURL:       fmt.Sprintf("%s/d/%s/zip", s.baseURL, box.ID),
-		ExpiresAt: box.ExpiresAt.Format(time.RFC3339),
+		ThumbnailURL: thumbnailURL,
-		Files:     files,
+		ExpiresAt:    box.ExpiresAt.Format(time.RFC3339),
+		Files:        files,
 	}
 	if deleteToken != "" {
 		result.ManageURL = fmt.Sprintf("%s/d/%s/manage/%s", s.baseURL, box.ID, deleteToken)
@@ -771,21 +1022,34 @@ func writeUploadedFile(path string, source multipart.File, maxSize int64) error
 	return nil
 }
 
-func (s *UploadService) writeUploadedObject(ctx context.Context, backend StorageBackend, key string, source multipart.File, size, maxSize int64, contentType string) error {
+func (s *UploadService) writeUploadedObject(ctx context.Context, backend StorageBackend, key string, source io.Reader, size, maxSize int64, contentType string) error {
 	var reader io.Reader = source
+	putSize := size
 	if maxSize > 0 {
-		reader = io.LimitReader(source, maxSize+1)
+		if size > maxSize {
-		var buffer bytes.Buffer
-		written, err := io.Copy(&buffer, reader)
-		if err != nil {
-			return err
-		}
-		if written > maxSize {
 			return fmt.Errorf("file exceeds max upload size")
 		}
-		return backend.Put(ctx, key, bytes.NewReader(buffer.Bytes()), written, contentType)
+		reader = io.LimitReader(source, maxSize)
+		putSize = size
+	}
+	if ctx != nil {
+		reader = contextReader{ctx: ctx, reader: reader}
+	}
+	return backend.Put(ctx, key, reader, putSize, contentType)
+}
+
+type contextReader struct {
+	ctx    context.Context
+	reader io.Reader
+}
+
+func (r contextReader) Read(p []byte) (int, error) {
+	select {
+	case <-r.ctx.Done():
+		return 0, r.ctx.Err()
+	default:
+		return r.reader.Read(p)
 	}
-	return backend.Put(ctx, key, reader, size, contentType)
 }
 
 func boxObjectKey(boxID, name string) string {
@@ -800,6 +1064,10 @@ func randomID(byteCount int) string {
 	return base64.RawURLEncoding.EncodeToString(data)
 }
 
+func RandomPublicToken(byteCount int) string {
+	return randomID(byteCount)
+}
+
 func hashPassword(password string) (string, string) {
 	salt := randomID(18)
 	return salt, passwordHash(salt, password)

backend/libs/services/upload_test.go

@@ -126,6 +126,262 @@ func TestLocalStorageBackendAndLegacyFallback(t *testing.T) {
 	object.Body.Close()
 }
 
+func TestResumableSessionUploadOutOfOrderAndComplete(t *testing.T) {
+	service := newTestUploadService(t)
+	session, err := service.CreateResumableSession([]ResumableFileInput{{
+		Name:        "note.txt",
+		Size:        11,
+		ContentType: "text/plain",
+		Fingerprint: "sha256:first-chunk",
+	}}, UploadOptions{MaxDays: 1, Password: "secret"}, 4, time.Hour, "")
+	if err != nil {
+		t.Fatalf("CreateResumableSession returned error: %v", err)
+	}
+	if session.ResumeToken == "" || session.ResumeTokenHash == "" {
+		t.Fatalf("resumable session did not create resume token: %+v", session)
+	}
+	if !service.VerifyResumableToken(session, session.ResumeToken) {
+		t.Fatalf("VerifyResumableToken rejected correct token")
+	}
+	if service.VerifyResumableToken(session, "wrong-token") {
+		t.Fatalf("VerifyResumableToken accepted wrong token")
+	}
+	stored, err := service.GetResumableSession(session.ID)
+	if err != nil {
+		t.Fatalf("GetResumableSession returned error: %v", err)
+	}
+	if stored.ResumeToken != "" {
+		t.Fatalf("stored session leaked raw resume token")
+	}
+	if strings.Contains(stored.ResumeTokenHash, session.ResumeToken) {
+		t.Fatalf("stored token hash contains raw token")
+	}
+	if !service.VerifyResumableToken(stored, session.ResumeToken) {
+		t.Fatalf("stored session rejected correct token")
+	}
+	if session.Options.Password != "" || session.Options.PasswordHash == "" || session.Options.PasswordSalt == "" {
+		t.Fatalf("resumable session did not hash password before storage: %+v", session.Options)
+	}
+	if session.Files[0].ChunkCount != 3 {
+		t.Fatalf("ChunkCount = %d, want 3", session.Files[0].ChunkCount)
+	}
+	if session.Files[0].Fingerprint != "sha256:first-chunk" {
+		t.Fatalf("Fingerprint = %q", session.Files[0].Fingerprint)
+	}
+	for index, body := range map[int]string{2: "rld", 0: "hell", 1: "o wo"} {
+		updated, err := service.PutResumableChunk(testContext(), session.ID, session.Files[0].ID, index, strings.NewReader(body))
+		if err != nil {
+			t.Fatalf("PutResumableChunk(%d) returned error: %v", index, err)
+		}
+		if len(updated.Files[0].UploadedChunks) == 0 {
+			t.Fatalf("UploadedChunks was not updated")
+		}
+	}
+	result, completed, err := service.CompleteResumableSession(testContext(), session.ID)
+	if err != nil {
+		t.Fatalf("CompleteResumableSession returned error: %v", err)
+	}
+	if completed.Status != ResumableStatusCompleted || completed.BoxID != result.BoxID {
+		t.Fatalf("completed session = %+v, result = %+v", completed, result)
+	}
+	box := getTestBox(t, service, result.BoxID)
+	if box.PasswordHash == "" || box.PasswordSalt == "" || box.PasswordHash != session.Options.PasswordHash {
+		t.Fatalf("completed box did not preserve hashed password")
+	}
+	object, err := service.OpenFileObject(testContext(), box, box.Files[0])
+	if err != nil {
+		t.Fatalf("OpenFileObject returned error: %v", err)
+	}
+	data, err := io.ReadAll(object.Body)
+	object.Body.Close()
+	if err != nil {
+		t.Fatalf("ReadAll returned error: %v", err)
+	}
+	if string(data) != "hello world" {
+		t.Fatalf("object body = %q", string(data))
+	}
+	if _, err := os.Stat(service.resumableSessionDir(session.ID)); !os.IsNotExist(err) {
+		t.Fatalf("resumable temp dir after complete error = %v, want os.ErrNotExist", err)
+	}
+	replayed, replayedSession, err := service.CompleteResumableSession(testContext(), session.ID)
+	if err != nil {
+		t.Fatalf("CompleteResumableSession replay returned error: %v", err)
+	}
+	if replayed.BoxID != result.BoxID || replayedSession.Status != ResumableStatusCompleted {
+		t.Fatalf("replayed result = %+v, session = %+v, want box %s completed", replayed, replayedSession, result.BoxID)
+	}
+}
+
+func TestResumableCompleteRejectsMissingChunks(t *testing.T) {
+	service := newTestUploadService(t)
+	session, err := service.CreateResumableSession([]ResumableFileInput{{
+		Name:        "note.txt",
+		Size:        8,
+		ContentType: "text/plain",
+	}}, UploadOptions{MaxDays: 1}, 4, time.Hour, "")
+	if err != nil {
+		t.Fatalf("CreateResumableSession returned error: %v", err)
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, session.Files[0].ID, 0, strings.NewReader("hell")); err != nil {
+		t.Fatalf("PutResumableChunk returned error: %v", err)
+	}
+	if _, _, err := service.CompleteResumableSession(testContext(), session.ID); err == nil {
+		t.Fatalf("CompleteResumableSession accepted missing chunks")
+	}
+}
+
+func TestResumablePartialCompleteKeepsOnlyFinishedFiles(t *testing.T) {
+	service := newTestUploadService(t)
+	session, err := service.CreateResumableSession([]ResumableFileInput{
+		{Name: "done.txt", Size: 4, ContentType: "text/plain", Fingerprint: "done"},
+		{Name: "partial.txt", Size: 8, ContentType: "text/plain", Fingerprint: "partial"},
+	}, UploadOptions{MaxDays: 1}, 4, time.Hour, "")
+	if err != nil {
+		t.Fatalf("CreateResumableSession returned error: %v", err)
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, session.Files[0].ID, 0, strings.NewReader("done")); err != nil {
+		t.Fatalf("PutResumableChunk done returned error: %v", err)
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, session.Files[1].ID, 0, strings.NewReader("part")); err != nil {
+		t.Fatalf("PutResumableChunk partial returned error: %v", err)
+	}
+	result, completed, err := service.CompleteUploadedResumableSession(testContext(), session.ID)
+	if err != nil {
+		t.Fatalf("CompleteUploadedResumableSession returned error: %v", err)
+	}
+	if completed.Status != ResumableStatusCompleted || completed.BoxID != result.BoxID || len(completed.Files) != 1 {
+		t.Fatalf("completed session = %+v, result = %+v", completed, result)
+	}
+	box := getTestBox(t, service, result.BoxID)
+	if len(box.Files) != 1 || box.Files[0].Name != "done.txt" {
+		t.Fatalf("partial completion box files = %+v", box.Files)
+	}
+	object, err := service.OpenFileObject(testContext(), box, box.Files[0])
+	if err != nil {
+		t.Fatalf("OpenFileObject returned error: %v", err)
+	}
+	data, err := io.ReadAll(object.Body)
+	object.Body.Close()
+	if err != nil {
+		t.Fatalf("ReadAll returned error: %v", err)
+	}
+	if string(data) != "done" {
+		t.Fatalf("partial completion object = %q", string(data))
+	}
+	if _, err := service.GetResumableSession(session.ID); !os.IsNotExist(err) {
+		t.Fatalf("GetResumableSession after partial complete error = %v, want os.ErrNotExist", err)
+	}
+	if _, err := os.Stat(service.resumableSessionDir(session.ID)); !os.IsNotExist(err) {
+		t.Fatalf("resumable temp dir after partial complete error = %v, want os.ErrNotExist", err)
+	}
+}
+
+func TestResumablePartialCompleteRejectsNoFinishedFiles(t *testing.T) {
+	service := newTestUploadService(t)
+	session, err := service.CreateResumableSession([]ResumableFileInput{{
+		Name:        "partial.txt",
+		Size:        8,
+		ContentType: "text/plain",
+	}}, UploadOptions{MaxDays: 1}, 4, time.Hour, "")
+	if err != nil {
+		t.Fatalf("CreateResumableSession returned error: %v", err)
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, session.Files[0].ID, 0, strings.NewReader("part")); err != nil {
+		t.Fatalf("PutResumableChunk returned error: %v", err)
+	}
+	if _, _, err := service.CompleteUploadedResumableSession(testContext(), session.ID); err == nil {
+		t.Fatalf("CompleteUploadedResumableSession accepted no completed files")
+	}
+	if _, err := service.GetResumableSession(session.ID); err != nil {
+		t.Fatalf("GetResumableSession after failed partial complete returned error: %v", err)
+	}
+}
+
+func TestResumableSessionCanAddFilesBeforeComplete(t *testing.T) {
+	service := newTestUploadService(t)
+	session, err := service.CreateResumableSession([]ResumableFileInput{{
+		Name:        "one.txt",
+		Size:        4,
+		ContentType: "text/plain",
+		Fingerprint: "one",
+	}}, UploadOptions{MaxDays: 1}, 4, time.Hour, "")
+	if err != nil {
+		t.Fatalf("CreateResumableSession returned error: %v", err)
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, session.Files[0].ID, 0, strings.NewReader("one!")); err != nil {
+		t.Fatalf("PutResumableChunk one returned error: %v", err)
+	}
+	updated, err := service.AddResumableFiles(session.ID, []ResumableFileInput{{
+		Name:        "two.txt",
+		Size:        4,
+		ContentType: "text/plain",
+		Fingerprint: "two",
+	}})
+	if err != nil {
+		t.Fatalf("AddResumableFiles returned error: %v", err)
+	}
+	if len(updated.Files) != 2 {
+		t.Fatalf("files after add = %d, want 2", len(updated.Files))
+	}
+	if updated.Files[0].UploadedChunks[0] != 0 {
+		t.Fatalf("existing uploaded chunk was not preserved: %+v", updated.Files[0])
+	}
+	if _, err := service.AddResumableFiles(session.ID, []ResumableFileInput{{
+		Name:        "two.txt",
+		Size:        4,
+		ContentType: "text/plain",
+		Fingerprint: "two",
+	}}); err != nil {
+		t.Fatalf("duplicate AddResumableFiles returned error: %v", err)
+	}
+	updated, err = service.GetResumableSession(session.ID)
+	if err != nil {
+		t.Fatalf("GetResumableSession returned error: %v", err)
+	}
+	if len(updated.Files) != 2 {
+		t.Fatalf("duplicate add changed file count to %d", len(updated.Files))
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, updated.Files[1].ID, 0, strings.NewReader("two!")); err != nil {
+		t.Fatalf("PutResumableChunk two returned error: %v", err)
+	}
+	result, _, err := service.CompleteResumableSession(testContext(), session.ID)
+	if err != nil {
+		t.Fatalf("CompleteResumableSession returned error: %v", err)
+	}
+	box := getTestBox(t, service, result.BoxID)
+	if len(box.Files) != 2 {
+		t.Fatalf("completed box file count = %d, want 2", len(box.Files))
+	}
+}
+
+func TestResumableCleanupRemovesExpiredSessionsAndChunks(t *testing.T) {
+	service := newTestUploadService(t)
+	session, err := service.CreateResumableSession([]ResumableFileInput{{
+		Name:        "note.txt",
+		Size:        4,
+		ContentType: "text/plain",
+	}}, UploadOptions{MaxDays: 1}, 4, time.Hour, "")
+	if err != nil {
+		t.Fatalf("CreateResumableSession returned error: %v", err)
+	}
+	if _, err := service.PutResumableChunk(testContext(), session.ID, session.Files[0].ID, 0, strings.NewReader("hell")); err != nil {
+		t.Fatalf("PutResumableChunk returned error: %v", err)
+	}
+	cleaned, err := service.CleanupExpiredResumableSessions(session.ExpiresAt.Add(time.Second))
+	if err != nil {
+		t.Fatalf("CleanupExpiredResumableSessions returned error: %v", err)
+	}
+	if cleaned != 1 {
+		t.Fatalf("cleaned = %d, want 1", cleaned)
+	}
+	if _, err := service.GetResumableSession(session.ID); !os.IsNotExist(err) {
+		t.Fatalf("GetResumableSession after cleanup error = %v, want os.ErrNotExist", err)
+	}
+	if _, err := os.Stat(service.resumableSessionDir(session.ID)); !os.IsNotExist(err) {
+		t.Fatalf("resumable temp dir after cleanup error = %v, want os.ErrNotExist", err)
+	}
+}
+
 func TestContaboStorageConfigAllowsDisplayNamesWithSpaces(t *testing.T) {
 	service := newTestUploadService(t)
 	cfg, err := service.Storage().CreateS3Backend(StorageBackendConfig{

backend/libs/web/renderer.go

@@ -7,6 +7,9 @@ import (
 	"time"
 )
 
+// RobotsNone is used for private, protected, expired, or temporary pages.
+const RobotsNone = "noindex,nofollow,noarchive"
+
 type Renderer struct {
 	templates  map[string]*template.Template
 	appName    string
@@ -15,16 +18,23 @@ type Renderer struct {
 }
 
 type PageData struct {
-	AppName     string
+	AppName      string
-	AppVersion  string
+	AppVersion   string
-	BaseURL     string
+	BaseURL      string
-	Title       string
+	CanonicalURL string
-	Description string
+	Robots       string
-	ImageURL    string
+	OGType       string
-	CurrentYear int
+	Title        string
-	CurrentUser any
+	Description  string
-	CSRFToken   string
+	ImageURL     string
-	Data        any
+	ImageAlt     string
+	ImageType    string
+	MediaURL     string
+	MediaType    string
+	CurrentYear  int
+	CurrentUser  any
+	CSRFToken    string
+	Data         any
 }
 
 func NewRenderer(templateDir, appName, appVersion, baseURL string) (*Renderer, error) {

backend/static/css/00-base.css

@@ -58,6 +58,69 @@
   --surface-2: rgba(39, 39, 42, 0.28);
 }
 
+:root[data-theme="gruvbox"] {
+  color-scheme: dark;
+  --background: #1d2021;
+  --foreground: #ebdbb2;
+  --card: #282828;
+  --card-foreground: #ebdbb2;
+  --muted: #32302f;
+  --muted-foreground: #bdae93;
+  --accent: #3c3836;
+  --accent-foreground: #fbf1c7;
+  --border: rgba(235, 219, 178, 0.18);
+  --input: rgba(235, 219, 178, 0.24);
+  --primary: #d79921;
+  --primary-foreground: #1d2021;
+  --primary-hover: #fabd2f;
+  --ring: #fe8019;
+  --success: #b8bb26;
+  --danger: #fb4934;
+  --radius: 0.65rem;
+  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
+  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  --header-bg: rgba(29, 32, 33, 0.86);
+  --body-bg:
+    radial-gradient(circle at 20% -8%, rgba(215, 153, 33, 0.2), transparent 28rem),
+    radial-gradient(circle at 85% 8%, rgba(184, 187, 38, 0.12), transparent 26rem),
+    linear-gradient(180deg, #1d2021 0%, #181a1b 100%);
+  --surface-1: rgba(235, 219, 178, 0.06);
+  --surface-1-hover: rgba(235, 219, 178, 0.11);
+  --surface-2: rgba(251, 241, 199, 0.04);
+}
+
+:root[data-theme="cyberpunk"] {
+  color-scheme: dark;
+  --background: #08070d;
+  --foreground: #fff36f;
+  --card: #16131f;
+  --card-foreground: #fff36f;
+  --muted: #251d34;
+  --muted-foreground: #9bfaff;
+  --accent: #332246;
+  --accent-foreground: #fff36f;
+  --border: rgba(255, 242, 0, 0.24);
+  --input: rgba(0, 240, 255, 0.34);
+  --primary: #fff200;
+  --primary-foreground: #08070d;
+  --primary-hover: #00f0ff;
+  --ring: #ff2a6d;
+  --success: #00ff9f;
+  --danger: #ff2a6d;
+  --radius: 0.35rem;
+  --shadow: 0 24px 70px rgba(255, 42, 109, 0.16), 0 0 34px rgba(0, 240, 255, 0.12);
+  --font-sans: "Inter", "Rajdhani", "Orbitron", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  --header-bg: rgba(8, 7, 13, 0.86);
+  --body-bg:
+    radial-gradient(circle at 10% -10%, rgba(255, 242, 0, 0.2), transparent 26rem),
+    radial-gradient(circle at 90% 8%, rgba(0, 240, 255, 0.18), transparent 26rem),
+    radial-gradient(circle at 45% 110%, rgba(255, 42, 109, 0.18), transparent 30rem),
+    linear-gradient(180deg, #08070d 0%, #120b1a 100%);
+  --surface-1: rgba(0, 240, 255, 0.07);
+  --surface-1-hover: rgba(255, 242, 0, 0.12);
+  --surface-2: rgba(255, 42, 109, 0.06);
+}
+
 :root[data-theme="retro"] {
   color-scheme: light;
   --background: #ffffff;
@@ -98,6 +161,7 @@ html {
   font-family: var(--font-sans);
   background: var(--background);
   color: var(--foreground);
+  overflow-x: clip;
 }
 
 body {
@@ -107,12 +171,27 @@ body {
   display: flex;
   flex-direction: column;
   background: var(--body-bg);
+  overflow-x: clip;
+}
+
+@supports not (overflow-x: clip) {
+  html,
+  body {
+    overflow-x: hidden;
+  }
 }
 
 a {
   color: inherit;
 }
 
+img,
+video,
+canvas,
+iframe {
+  max-width: 100%;
+}
+
 svg {
   width: 1rem;
   height: 1rem;
@@ -176,10 +255,18 @@ svg {
 }
 
 .brand {
+  min-width: 0;
   font-weight: 650;
   text-decoration: none;
 }
 
+.brand > span:last-child {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .brand-mark {
   width: 1.75rem;
   height: 1.75rem;
@@ -312,12 +399,15 @@ label span {
 
 input,
 select,
+textarea,
 button {
   font: inherit;
+  max-width: 100%;
 }
 
 input,
-select {
+select,
+textarea {
   width: 100%;
   min-height: 2.25rem;
   border: 1px solid var(--input);
@@ -354,6 +444,8 @@ input:disabled {
 
 .button,
 button {
+  min-width: 0;
+  max-width: 100%;
   min-height: 2.25rem;
   display: inline-flex;
   align-items: center;
@@ -372,6 +464,14 @@ button {
   cursor: pointer;
 }
 
+.button > span,
+button > span {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .button-primary {
   background: var(--primary);
   color: var(--primary-foreground);
@@ -433,6 +533,8 @@ pre code {
 .badge {
   display: inline-flex;
   align-items: center;
+  max-width: 100%;
+  min-width: 0;
   min-height: 1.5rem;
   border-radius: 999px;
   background: var(--muted);
@@ -440,6 +542,9 @@ pre code {
   padding: 0.2rem 0.6rem;
   font-size: 0.75rem;
   font-weight: 600;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .sr-only {

backend/static/css/10-layout.css

@@ -1,5 +1,6 @@
 .app-shell {
   width: min(86rem, calc(100% - 2rem));
+  max-width: 100%;
   margin: 0 auto;
   padding: 2rem 0;
   display: grid;
@@ -8,6 +9,7 @@
 }
 
 .app-sidebar {
+  min-width: 0;
   position: sticky;
   top: 5rem;
   align-self: start;
@@ -20,6 +22,7 @@
 }
 
 .sidebar-link {
+  min-width: 0;
   display: flex;
   align-items: center;
   gap: 0.55rem;
@@ -30,6 +33,13 @@
   text-decoration: none;
 }
 
+.sidebar-link span {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .sidebar-link:hover,
 .sidebar-link.is-active {
   border-color: var(--border);
@@ -100,7 +110,7 @@
 
 .inline-controls input,
 .inline-controls select {
-  min-width: 15rem;
+  min-width: min(15rem, 100%);
 }
 
 .compact-input {
@@ -108,10 +118,18 @@
 }
 
 .settings-form {
+  min-width: 0;
   display: grid;
   gap: 1.5rem;
 }
 
+.settings-form > *,
+.settings-section > *,
+.tabs-bar > *,
+.tab-list > * {
+  min-width: 0;
+}
+
 .settings-form-narrow {
   grid-template-columns: minmax(0, 1fr);
   gap: 0.9rem;
@@ -207,6 +225,7 @@
   top: calc(100% + 0.5rem);
   z-index: 10;
   width: 15rem;
+  max-width: min(15rem, calc(100vw - 2rem));
   padding: 1rem;
   background: color-mix(in srgb, var(--card) 97%, #000);
   border: 1px solid var(--border);
@@ -226,6 +245,7 @@
 /* Copyable URL field */
 .copy-field {
   display: flex;
+  min-width: 0;
   gap: 0.5rem;
   align-items: center;
   margin-top: 0.75rem;

backend/static/css/15-revamp.css

@@ -2,19 +2,19 @@
  * Revamp ("Aurora glass") flourishes.
  *
  * These rules only apply to the default/revamp theme. They are scoped to
- * :root:not([data-theme="classic"]):not([data-theme="retro"]) so they cover both the explicit
+ * :root exclusions so they cover both the explicit data-theme="revamp"
- * data-theme="revamp" attribute AND the no-JS default (no attribute), while
+ * attribute AND the no-JS default (no attribute), while never touching the
- * never touching the classic theme. Token colours live in 00-base.css; this
+ * alternate themes. Token colours live in 00-base.css; this file adds the
- * file adds the things a flat token swap can't: the animated aurora backdrop,
+ * things a flat token swap can't: the animated aurora backdrop, frosted glass,
- * frosted glass, gradient accents, glow and motion.
+ * gradient accents, glow and motion.
  */
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) {
   scroll-behavior: smooth;
 }
 
 /* Animated aurora backdrop ------------------------------------------------ */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) body::before {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) body::before {
   content: "";
   position: fixed;
   inset: -20vmax;
@@ -29,7 +29,7 @@
   animation: aurora-drift 26s ease-in-out infinite alternate;
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) body::after {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) body::after {
   content: "";
   position: fixed;
   inset: 0;
@@ -52,13 +52,13 @@
 }
 
 @media (prefers-reduced-motion: reduce) {
-  :root:not([data-theme="classic"]):not([data-theme="retro"]) body::before {
+  :root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) body::before {
     animation: none;
   }
 }
 
 /* Frosted glass cards ----------------------------------------------------- */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .card {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .card {
   background: linear-gradient(
     155deg,
     color-mix(in srgb, var(--card) 78%, transparent),
@@ -70,20 +70,20 @@
 }
 
 /* Sticky header gets the same glassy treatment */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .site-header {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .site-header {
   backdrop-filter: blur(20px) saturate(150%);
   -webkit-backdrop-filter: blur(20px) saturate(150%);
 }
 
 /* Brand mark glows */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .brand-mark {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .brand-mark {
   background: linear-gradient(135deg, #8b5cf6, #6366f1 55%, #22d3ee);
   color: #fff;
   box-shadow: 0 6px 18px rgba(124, 58, 237, 0.45);
 }
 
 /* Headings get a soft gradient sheen */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) h1 {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) h1 {
   background: linear-gradient(120deg, #f5f3ff 0%, #c4b5fd 60%, #67e8f9 100%);
   -webkit-background-clip: text;
   background-clip: text;
@@ -91,8 +91,8 @@
 }
 
 /* Gradient primary buttons ------------------------------------------------ */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-primary,
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-primary,
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button.is-active {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button.is-active {
   background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 55%, #22d3ee 130%);
   color: #fff;
   border-color: transparent;
@@ -100,43 +100,43 @@
   transition: transform 140ms ease, box-shadow 160ms ease, filter 160ms ease;
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-primary:hover {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-primary:hover {
   background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 55%, #22d3ee 130%);
   filter: brightness(1.08);
   box-shadow: 0 12px 30px rgba(99, 102, 241, 0.5);
   transform: translateY(-1px);
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-primary:active {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-primary:active {
   transform: translateY(0);
 }
 
 /* Outline / ghost buttons get a subtle lift on hover */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-outline,
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-outline,
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-ghost {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-ghost {
   transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-outline:hover,
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-outline:hover,
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .button-ghost:hover {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .button-ghost:hover {
   border-color: rgba(168, 150, 255, 0.4);
   transform: translateY(-1px);
 }
 
 /* Glow focus rings -------------------------------------------------------- */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) :focus-visible {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) :focus-visible {
   outline: 2px solid transparent;
   box-shadow: 0 0 0 2px var(--background), 0 0 0 4px var(--ring), 0 0 16px rgba(167, 139, 250, 0.55);
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) input:focus,
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) input:focus,
-:root:not([data-theme="classic"]):not([data-theme="retro"]) select:focus {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) select:focus {
   border-color: var(--ring);
   box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.22);
 }
 
 /* Drop zone: animated, glowing -------------------------------------------- */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .drop-zone {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .drop-zone {
   border-color: rgba(168, 150, 255, 0.3);
   background:
     radial-gradient(120% 90% at 50% 0%, rgba(139, 92, 246, 0.1), transparent 70%),
@@ -144,18 +144,18 @@
   transition: border-color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .drop-zone:hover,
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .drop-zone:hover,
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .drop-zone.is-dragging {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .drop-zone.is-dragging {
   border-color: #a78bfa;
   box-shadow: 0 0 0 1px rgba(167, 139, 250, 0.4), 0 18px 50px rgba(99, 102, 241, 0.28);
   transform: translateY(-2px);
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .drop-icon {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .drop-icon {
   color: #c4b5fd;
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .drop-zone.is-dragging .drop-icon {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .drop-zone.is-dragging .drop-icon {
   animation: drop-bounce 700ms ease infinite;
 }
 
@@ -165,34 +165,34 @@
 }
 
 /* Badges pick up a tinted glass look */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .badge {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .badge {
   background: rgba(139, 92, 246, 0.14);
   color: #d6ccff;
   border: 1px solid rgba(168, 150, 255, 0.22);
 }
 
 /* File / result rows lift on hover */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .download-item,
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .download-item,
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .result-item {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .result-item {
   background: color-mix(in srgb, var(--card) 60%, transparent);
   border-color: rgba(168, 150, 255, 0.14);
   transition: border-color 140ms ease, transform 140ms ease, background 140ms ease;
 }
 
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .download-item:hover {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .download-item:hover {
   border-color: rgba(168, 150, 255, 0.34);
   transform: translateY(-1px);
 }
 
 /* Thumbnails on the download page */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) .file-emblem {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) .file-emblem {
   background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(34, 211, 238, 0.18));
   color: #d6ccff;
   border: 1px solid rgba(168, 150, 255, 0.22);
 }
 
 /* Gentle entrance for primary content cards */
-:root:not([data-theme="classic"]):not([data-theme="retro"]) main > * {
+:root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) main > * {
   animation: rise-in 420ms ease both;
 }
 
@@ -208,7 +208,7 @@
 }
 
 @media (prefers-reduced-motion: reduce) {
-  :root:not([data-theme="classic"]):not([data-theme="retro"]) main > * {
+  :root:not([data-theme="classic"]):not([data-theme="retro"]):not([data-theme="gruvbox"]):not([data-theme="cyberpunk"]) main > * {
     animation: none;
   }
 }

backend/static/css/16-retro.css

@@ -150,17 +150,18 @@
   box-shadow: inset -1px -1px 0 #404040, inset 1px 1px 0 #ffffff, inset -2px -2px 0 #808080, inset 2px 2px 0 #dfdfdf;
 }
 
-/* Links: classic blue, underlined, purple when visited. */
+/* Links: classic blue, underlined, purple when visited. Sidebar links and tabs
-:root[data-theme="retro"] a:not(.button):not(.brand) {
+   are styled as their own Win98 controls below, so they're excluded here. */
+:root[data-theme="retro"] a:not(.button):not(.brand):not(.sidebar-link):not(.tab):not(.sort-link) {
   color: #0000ee;
   text-decoration: underline;
 }
 
-:root[data-theme="retro"] a:not(.button):not(.brand):visited {
+:root[data-theme="retro"] a:not(.button):not(.brand):not(.sidebar-link):not(.tab):not(.sort-link):visited {
   color: #551a8b;
 }
 
-:root[data-theme="retro"] a:not(.button):not(.brand):hover {
+:root[data-theme="retro"] a:not(.button):not(.brand):not(.sidebar-link):not(.tab):not(.sort-link):hover {
   color: #ee0000;
 }
 
@@ -188,14 +189,25 @@
   padding-left: calc(0.85rem + 1px);
 }
 
-/* The primary call-to-action gets the blue title-bar gradient. */
+/* The primary call-to-action is a glossy raised blue button. A vertical
+   gradient + strong 3D bevel keeps it clearly a button (and distinct from the
+   horizontal title-bar gradient). */
 :root[data-theme="retro"] .button-primary {
-  background: linear-gradient(to right, #000078, 80%, #0f80cd);
+  background: linear-gradient(to bottom, #2f86e0 0%, #0a3aa0 52%, #000078 100%);
   color: #ffffff;
+  border: 1px solid #000000;
+  box-shadow: inset -1px -1px 0 #00003a, inset 1px 1px 0 #7fc0ff, inset -2px -2px 0 #001a6a, inset 2px 2px 0 #3f9fe8;
+  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.4);
 }
 
 :root[data-theme="retro"] .button-primary:hover {
-  background: linear-gradient(to right, #0a0a9a, 80%, #1a90dd);
+  filter: brightness(1.08);
+}
+
+:root[data-theme="retro"] .button-primary:active {
+  box-shadow: inset 1px 1px 0 #00003a, inset -1px -1px 0 #7fc0ff;
+  padding-top: calc(0.45rem + 1px);
+  padding-left: calc(0.85rem + 1px);
 }
 
 :root[data-theme="retro"] .button-danger {
@@ -276,7 +288,8 @@
    the API section cards. Pages where a heading sits below an icon or kicker
    (download/preview/login) keep the inset heading from the base h1 rule. */
 :root[data-theme="retro"] .card-content > h1:first-child,
-:root[data-theme="retro"] .docs-header h1 {
+:root[data-theme="retro"] .docs-header h1,
+:root[data-theme="retro"] .download-view-wide .download-card h1 {
   margin: -1.5rem -1.5rem 1rem;
 }
 
@@ -440,3 +453,291 @@
     display: none;
   }
 }
+
+/* ------------------------------------------------------------------------- */
+/* App / admin shell (dashboard, account, admin pages)                       */
+/* These use dark revamp tokens by default, which are unreadable on the black */
+/* retro desktop. Re-skin them as Win98 chrome: a raised silver sidebar with  */
+/* solid links, light page headers on the desktop, and bevelled stat cards.   */
+/* ------------------------------------------------------------------------- */
+
+/* Sidebar = raised silver panel. */
+:root[data-theme="retro"] .app-sidebar,
+:root[data-theme="retro"] .admin-shell .app-sidebar {
+  background: #c0c0c0;
+  border: 1px solid #000000;
+  box-shadow: var(--shadow);
+}
+
+:root[data-theme="retro"] .sidebar-link {
+  color: #000000;
+  border: 1px solid transparent;
+  font-weight: 700;
+}
+
+:root[data-theme="retro"] .sidebar-link:hover,
+:root[data-theme="retro"] .sidebar-link.is-active,
+:root[data-theme="retro"] .admin-shell .sidebar-link.is-active {
+  background: linear-gradient(to right, #000078, 80%, #0f80cd);
+  color: #ffffff;
+  border-color: #000000;
+}
+
+:root[data-theme="retro"] .sidebar-sep {
+  background: #808080;
+  height: 2px;
+  box-shadow: 0 1px 0 #ffffff;
+}
+
+/* Page header sits on the black desktop: light kicker, plain light title
+   (not a floating title bar), light subtitle. */
+:root[data-theme="retro"] .admin-header .kicker {
+  color: #ffd966;
+}
+
+:root[data-theme="retro"] .admin-header .muted-copy {
+  color: #cfd8ff;
+}
+
+:root[data-theme="retro"] .admin-header h1 {
+  margin: 0;
+  padding: 0;
+  display: block;
+  background: none;
+  color: #ffffff;
+}
+
+:root[data-theme="retro"] .admin-header h1::after {
+  content: none;
+}
+
+/* Collection / nav tabs become small bevelled buttons. */
+:root[data-theme="retro"] .tab {
+  background: #c0c0c0;
+  color: #000000;
+  border: 1px solid #000000;
+  font-weight: 700;
+  box-shadow: inset -1px -1px 0 #404040, inset 1px 1px 0 #ffffff, inset -2px -2px 0 #808080, inset 2px 2px 0 #dfdfdf;
+}
+
+:root[data-theme="retro"] .tab:hover {
+  background: #d4d0c8;
+  color: #000000;
+}
+
+:root[data-theme="retro"] .tab.is-active {
+  background: linear-gradient(to right, #000078, 80%, #0f80cd);
+  color: #ffffff;
+}
+
+/* Metric cards = sunken white stat boxes with crisp black numbers. */
+:root[data-theme="retro"] .metric-card {
+  background: #ffffff;
+  border: 1px solid #000000;
+  box-shadow: inset 1px 1px 0 #808080, inset -1px -1px 0 #ffffff;
+}
+
+:root[data-theme="retro"] .metric-card span {
+  color: #404040;
+}
+
+:root[data-theme="retro"] .metric-card strong {
+  color: #000000;
+}
+
+/* The "+ Collection" popover becomes a small floating window. */
+:root[data-theme="retro"] .new-collection-body {
+  background: #c0c0c0;
+  border: 1px solid #000000;
+  box-shadow: var(--shadow);
+  color: #000000;
+}
+
+/* The storage inline edit form panel. */
+:root[data-theme="retro"] .storage-edit-form {
+  background: #c0c0c0;
+  border: 1px solid #000000;
+  box-shadow: var(--shadow);
+}
+
+/* ------------------------------------------------------------------------- */
+/* Download / box page                                                       */
+/* ------------------------------------------------------------------------- */
+
+/* The decorative file glyph above the title doesn't suit a Win98 window. */
+:root[data-theme="retro"] .file-emblem {
+  display: none;
+}
+
+/* The download window's content is left-aligned like a real file manager. */
+:root[data-theme="retro"] .download-view-wide .download-card {
+  text-align: left;
+}
+
+/* Expiry shown as a sunken status field with a little clock. */
+:root[data-theme="retro"] .badge-row {
+  justify-content: flex-start;
+}
+
+:root[data-theme="retro"] .badge-expiry {
+  background: #ffffff;
+  color: #000000;
+  border: 1px solid #000000;
+  box-shadow: inset 1px 1px 0 #808080, inset -1px -1px 0 #ffffff;
+  font-weight: 700;
+  padding: 0.3rem 0.7rem;
+}
+
+:root[data-theme="retro"] .badge-expiry::before {
+  content: "\23F1  ";
+}
+
+/* The file browser becomes a Win98 Explorer window: blue titlebar, grey
+   toolbar, sunken content pane and flat rows. */
+:root[data-theme="retro"] .file-browser-window {
+  border: 1px solid #000000;
+  border-radius: 0;
+  background: #c0c0c0;
+  box-shadow: inset -1px -1px 0 #404040, inset 1px 1px 0 #ffffff, inset -2px -2px 0 #808080, inset 2px 2px 0 #dfdfdf;
+}
+
+:root[data-theme="retro"] .file-browser-titlebar {
+  min-height: 1.8rem;
+  margin: 3px 3px 0;
+  padding: 0.2rem 0.45rem;
+  border: 0;
+  background: linear-gradient(to right, #000078 0%, #000078 80%, #0f80cd 100%);
+  color: #ffffff;
+}
+
+:root[data-theme="retro"] .file-browser-titlebar strong,
+:root[data-theme="retro"] .file-browser-titlebar span {
+  color: #ffffff;
+  font-size: 0.78rem;
+}
+
+:root[data-theme="retro"] .file-browser-window-actions {
+  display: none;
+}
+
+:root[data-theme="retro"] .file-browser-toolbar {
+  justify-content: space-between;
+  margin: 0 3px;
+  padding: 3px;
+  border: 0;
+  border-bottom: 1px solid #808080;
+  background: #c0c0c0;
+}
+
+:root[data-theme="retro"] .view-toolbar {
+  justify-content: flex-start;
+  gap: 2px;
+  margin-top: 0;
+  padding: 0;
+  background: #c0c0c0;
+  border: 0;
+  box-shadow: none;
+}
+
+:root[data-theme="retro"] .view-toolbar .button,
+:root[data-theme="retro"] .file-browser-toolbar > .button {
+  display: inline-grid;
+  place-items: center;
+  background: transparent;
+  border: 1px solid transparent;
+  box-shadow: none;
+  font-weight: 400;
+}
+
+:root[data-theme="retro"] .view-toolbar .icon-button {
+  width: 2.2rem;
+  height: 2rem;
+  padding: 0;
+}
+
+:root[data-theme="retro"] .view-toolbar .icon-button svg {
+  margin: 0;
+  display: block;
+}
+
+:root[data-theme="retro"] .view-toolbar .button:hover,
+:root[data-theme="retro"] .file-browser-toolbar > .button:hover {
+  background: #c0c0c0;
+  box-shadow: inset -1px -1px 0 #808080, inset 1px 1px 0 #ffffff;
+}
+
+:root[data-theme="retro"] .view-toolbar .button.is-active,
+:root[data-theme="retro"] .file-browser-toolbar > .button.is-active {
+  background: #d4d0c8;
+  box-shadow: inset 1px 1px 0 #808080, inset -1px -1px 0 #ffffff;
+}
+
+:root[data-theme="retro"] .file-browser-head {
+  margin: 0 3px;
+  border: 0;
+  border-bottom: 1px solid #808080;
+  background: #c0c0c0;
+  color: #000000;
+  text-transform: none;
+}
+
+:root[data-theme="retro"] .file-browser {
+  margin: 0 3px 3px;
+  border: 1px solid #000000;
+  background: #ffffff;
+  box-shadow: inset 1px 1px 0 #808080, inset -1px -1px 0 #ffffff;
+}
+
+:root[data-theme="retro"] .download-item {
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+}
+
+:root[data-theme="retro"] .file-open {
+  border-radius: 0;
+  color: #000000;
+}
+
+:root[data-theme="retro"] .file-open:hover,
+:root[data-theme="retro"] .file-open:focus-visible {
+  background: transparent;
+  color: #000000;
+  outline: 2px solid #000078;
+  outline-offset: -2px;
+}
+
+:root[data-theme="retro"] .file-browser.is-list .file-card:hover,
+:root[data-theme="retro"] .file-browser.is-list .file-card:focus-within {
+  background: transparent;
+  outline: 2px solid #000078;
+  outline-offset: -2px;
+}
+
+:root[data-theme="retro"] .file-browser.is-list .file-card:hover .file-open,
+:root[data-theme="retro"] .file-browser.is-list .file-card:focus-within .file-open {
+  outline: 0;
+}
+
+:root[data-theme="retro"] .file-media {
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+}
+
+:root[data-theme="retro"] .file-browser.is-thumbs .file-open {
+  align-content: start;
+  justify-content: center;
+}
+
+:root[data-theme="retro"] .file-browser.is-thumbs .file-media {
+  justify-self: center;
+  align-self: start;
+}
+
+:root[data-theme="retro"] .file-type,
+:root[data-theme="retro"] .file-size,
+:root[data-theme="retro"] .file-main small {
+  color: inherit;
+}

backend/static/css/17-gruvbox.css

@@ -0,0 +1,88 @@
+/*
+ * Gruvbox theme polish.
+ *
+ * Core colour tokens live in 00-base.css. This file adds the warmer, grounded
+ * Gruvbox-specific surface treatment without changing layout behavior.
+ */
+
+:root[data-theme="gruvbox"] .site-header {
+  border-bottom-color: rgba(250, 189, 47, 0.2);
+  backdrop-filter: blur(16px) saturate(130%);
+  -webkit-backdrop-filter: blur(16px) saturate(130%);
+}
+
+:root[data-theme="gruvbox"] .brand-mark {
+  background: linear-gradient(135deg, #d79921, #fe8019);
+  color: #1d2021;
+  box-shadow: 0 8px 22px rgba(254, 128, 25, 0.22);
+}
+
+:root[data-theme="gruvbox"] .card,
+:root[data-theme="gruvbox"] .app-sidebar,
+:root[data-theme="gruvbox"] .storage-card,
+:root[data-theme="gruvbox"] .storage-op-card,
+:root[data-theme="gruvbox"] .metric-card,
+:root[data-theme="gruvbox"] .logs-filter-card {
+  background: color-mix(in srgb, var(--card) 92%, #1d2021);
+  border-color: rgba(235, 219, 178, 0.16);
+}
+
+:root[data-theme="gruvbox"] .admin-shell .app-sidebar {
+  border-color: rgba(250, 189, 47, 0.32);
+  background: linear-gradient(180deg, rgba(215, 153, 33, 0.12), rgba(40, 40, 40, 0.94));
+}
+
+:root[data-theme="gruvbox"] .admin-shell .sidebar-link.is-active {
+  border-color: rgba(250, 189, 47, 0.36);
+  background: rgba(215, 153, 33, 0.14);
+}
+
+:root[data-theme="gruvbox"] .admin-shell .kicker,
+:root[data-theme="gruvbox"] .kicker {
+  color: #fabd2f;
+}
+
+:root[data-theme="gruvbox"] h1 {
+  color: #fbf1c7;
+}
+
+:root[data-theme="gruvbox"] .button-primary,
+:root[data-theme="gruvbox"] .button.is-active {
+  border-color: rgba(250, 189, 47, 0.3);
+  background: linear-gradient(135deg, #d79921, #fabd2f);
+  color: #1d2021;
+  box-shadow: 0 10px 24px rgba(215, 153, 33, 0.2);
+}
+
+:root[data-theme="gruvbox"] .button-primary:hover {
+  background: linear-gradient(135deg, #fabd2f, #fe8019);
+}
+
+:root[data-theme="gruvbox"] .button-outline,
+:root[data-theme="gruvbox"] .button-ghost:hover,
+:root[data-theme="gruvbox"] .button-outline:hover {
+  border-color: rgba(235, 219, 178, 0.2);
+}
+
+:root[data-theme="gruvbox"] .badge-active,
+:root[data-theme="gruvbox"] .storage-detail-test.is-ok > span:last-child {
+  color: #b8bb26;
+}
+
+:root[data-theme="gruvbox"] .badge-disabled,
+:root[data-theme="gruvbox"] .storage-detail-test.is-err > span:last-child,
+:root[data-theme="gruvbox"] .form-error {
+  color: #fb4934;
+}
+
+:root[data-theme="gruvbox"] input:focus,
+:root[data-theme="gruvbox"] select:focus,
+:root[data-theme="gruvbox"] textarea:focus {
+  border-color: #fe8019;
+  box-shadow: 0 0 0 3px rgba(254, 128, 25, 0.18);
+}
+
+:root[data-theme="gruvbox"] ::selection {
+  background: #d79921;
+  color: #1d2021;
+}

backend/static/css/18-cyberpunk.css

@@ -0,0 +1,196 @@
+/*
+ * CyberPunk theme polish.
+ *
+ * Inspired by neon Cyberpunk 2077 UI treatments: warning yellow surfaces,
+ * cyan/magenta light, hard edges, scanlines, and high-contrast panels.
+ */
+
+:root[data-theme="cyberpunk"] body::before {
+  content: "";
+  position: fixed;
+  inset: 0;
+  z-index: -1;
+  pointer-events: none;
+  background:
+    linear-gradient(rgba(255, 242, 0, 0.035) 1px, transparent 1px),
+    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
+  background-size: 100% 3px, 3rem 100%;
+  mix-blend-mode: screen;
+}
+
+:root[data-theme="cyberpunk"] body::after {
+  content: "";
+  position: fixed;
+  inset: 0;
+  z-index: -1;
+  pointer-events: none;
+  background:
+    linear-gradient(115deg, transparent 0 18%, rgba(255, 242, 0, 0.06) 18% 19%, transparent 19% 100%),
+    linear-gradient(245deg, transparent 0 76%, rgba(255, 42, 109, 0.08) 76% 77%, transparent 77% 100%);
+}
+
+:root[data-theme="cyberpunk"] .site-header {
+  border-bottom-color: rgba(255, 242, 0, 0.32);
+  box-shadow: 0 0 22px rgba(0, 240, 255, 0.12);
+  backdrop-filter: blur(12px) saturate(150%);
+  -webkit-backdrop-filter: blur(12px) saturate(150%);
+}
+
+:root[data-theme="cyberpunk"] .brand {
+  text-transform: lowercase;
+  letter-spacing: 0.02em;
+}
+
+:root[data-theme="cyberpunk"] .brand-mark {
+  background: #fff200;
+  color: #08070d;
+  box-shadow: 0 0 0 1px rgba(0, 240, 255, 0.45), 0 0 18px rgba(255, 242, 0, 0.42);
+  clip-path: polygon(0 0, 100% 0, 100% 72%, 78% 100%, 0 100%);
+}
+
+:root[data-theme="cyberpunk"] h1 {
+  color: #fff200;
+  text-shadow: 2px 0 0 rgba(255, 42, 109, 0.58), -2px 0 0 rgba(0, 240, 255, 0.46);
+}
+
+:root[data-theme="cyberpunk"] .card,
+:root[data-theme="cyberpunk"] .app-sidebar,
+:root[data-theme="cyberpunk"] .storage-card,
+:root[data-theme="cyberpunk"] .storage-op-card,
+:root[data-theme="cyberpunk"] .metric-card,
+:root[data-theme="cyberpunk"] .logs-filter-card,
+:root[data-theme="cyberpunk"] .advanced-options {
+  position: relative;
+  background:
+    linear-gradient(145deg, rgba(22, 19, 31, 0.96), rgba(13, 10, 20, 0.96)),
+    linear-gradient(90deg, rgba(255, 242, 0, 0.16), rgba(0, 240, 255, 0.08));
+  border-color: rgba(255, 242, 0, 0.28);
+  box-shadow: var(--shadow);
+}
+
+:root[data-theme="cyberpunk"] .card::before,
+:root[data-theme="cyberpunk"] .storage-card::before,
+:root[data-theme="cyberpunk"] .metric-card::before {
+  content: "";
+  position: absolute;
+  inset: 0;
+  pointer-events: none;
+  border-top: 1px solid rgba(0, 240, 255, 0.4);
+  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
+}
+
+:root[data-theme="cyberpunk"] .admin-shell .app-sidebar {
+  border-color: rgba(255, 42, 109, 0.38);
+  background:
+    linear-gradient(180deg, rgba(255, 42, 109, 0.16), rgba(8, 7, 13, 0.94)),
+    #16131f;
+}
+
+:root[data-theme="cyberpunk"] .sidebar-link:hover,
+:root[data-theme="cyberpunk"] .sidebar-link.is-active,
+:root[data-theme="cyberpunk"] .admin-shell .sidebar-link.is-active {
+  border-color: rgba(255, 242, 0, 0.42);
+  background: linear-gradient(90deg, rgba(255, 242, 0, 0.2), rgba(0, 240, 255, 0.08));
+  color: #fff200;
+}
+
+:root[data-theme="cyberpunk"] .kicker,
+:root[data-theme="cyberpunk"] .admin-shell .kicker {
+  color: #00f0ff;
+  text-shadow: 0 0 12px rgba(0, 240, 255, 0.36);
+}
+
+:root[data-theme="cyberpunk"] .button-primary,
+:root[data-theme="cyberpunk"] .button.is-active {
+  border-color: #fff200;
+  background: #fff200;
+  color: #08070d;
+  box-shadow: 4px 4px 0 rgba(255, 42, 109, 0.7), 0 0 18px rgba(255, 242, 0, 0.3);
+  clip-path: polygon(0 0, calc(100% - 0.7rem) 0, 100% 0.7rem, 100% 100%, 0.7rem 100%, 0 calc(100% - 0.7rem));
+}
+
+:root[data-theme="cyberpunk"] .button-primary:hover,
+:root[data-theme="cyberpunk"] .button.is-active:hover {
+  background: #00f0ff;
+  border-color: #00f0ff;
+  color: #08070d;
+  box-shadow: 4px 4px 0 rgba(255, 42, 109, 0.78), 0 0 22px rgba(0, 240, 255, 0.42);
+}
+
+:root[data-theme="cyberpunk"] .button-outline,
+:root[data-theme="cyberpunk"] .button-ghost {
+  border-color: rgba(0, 240, 255, 0.28);
+}
+
+:root[data-theme="cyberpunk"] .button-outline:hover,
+:root[data-theme="cyberpunk"] .button-ghost:hover {
+  border-color: rgba(255, 242, 0, 0.46);
+  background: rgba(255, 242, 0, 0.1);
+}
+
+:root[data-theme="cyberpunk"] input,
+:root[data-theme="cyberpunk"] select,
+:root[data-theme="cyberpunk"] textarea {
+  background: rgba(8, 7, 13, 0.92);
+  border-color: rgba(0, 240, 255, 0.34);
+}
+
+:root[data-theme="cyberpunk"] input:focus,
+:root[data-theme="cyberpunk"] select:focus,
+:root[data-theme="cyberpunk"] textarea:focus {
+  border-color: #fff200;
+  box-shadow: 0 0 0 3px rgba(255, 242, 0, 0.16), 0 0 22px rgba(0, 240, 255, 0.18);
+}
+
+:root[data-theme="cyberpunk"] .badge {
+  border: 1px solid rgba(0, 240, 255, 0.22);
+  background: rgba(0, 240, 255, 0.08);
+  color: #9bfaff;
+}
+
+:root[data-theme="cyberpunk"] .badge-active,
+:root[data-theme="cyberpunk"] .storage-detail-test.is-ok > span:last-child {
+  color: #00ff9f;
+}
+
+:root[data-theme="cyberpunk"] .badge-disabled,
+:root[data-theme="cyberpunk"] .storage-detail-test.is-err > span:last-child,
+:root[data-theme="cyberpunk"] .form-error {
+  color: #ff2a6d;
+}
+
+:root[data-theme="cyberpunk"] .drop-zone {
+  border-color: rgba(255, 242, 0, 0.34);
+  background:
+    linear-gradient(145deg, rgba(255, 242, 0, 0.08), transparent 38%),
+    rgba(8, 7, 13, 0.76);
+}
+
+:root[data-theme="cyberpunk"] .drop-zone:hover,
+:root[data-theme="cyberpunk"] .drop-zone.is-dragging {
+  border-color: #00f0ff;
+  background:
+    linear-gradient(145deg, rgba(0, 240, 255, 0.14), transparent 42%),
+    rgba(8, 7, 13, 0.82);
+}
+
+:root[data-theme="cyberpunk"] ::selection {
+  background: #ff2a6d;
+  color: #ffffff;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  :root[data-theme="cyberpunk"] .brand-mark,
+  :root[data-theme="cyberpunk"] h1 {
+    animation: cyberpunk-pulse 4s ease-in-out infinite;
+  }
+}
+
+@keyframes cyberpunk-pulse {
+  0%, 100% {
+    filter: none;
+  }
+  50% {
+    filter: drop-shadow(0 0 0.45rem rgba(0, 240, 255, 0.28));
+  }
+}

backend/static/css/20-upload.css

@@ -48,6 +48,14 @@
   width: 100%;
 }
 
+.upload-options .form-footer .upload-new-button {
+  margin-top: -0.25rem;
+}
+
+.upload-options .form-footer .upload-new-button[hidden] {
+  display: none !important;
+}
+
 .hero-copy {
   text-align: center;
 }
@@ -335,10 +343,13 @@ button {
 .file-progress-side {
   width: min(10rem, 32vw);
   display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
   gap: 0.35rem;
+  align-items: center;
 }
 
 .file-progress-percent {
+  grid-column: 1 / -1;
   color: var(--muted-foreground);
   font-size: 0.75rem;
   text-align: right;
@@ -349,6 +360,81 @@ button {
   margin-top: 0;
 }
 
+.upload-file-remove {
+  width: 1.65rem;
+  height: 1.65rem;
+  min-height: 1.65rem;
+  padding: 0;
+  border-color: var(--border);
+  border-radius: 999px;
+  color: var(--muted-foreground);
+  background: var(--surface-1);
+  font-size: 1rem;
+  line-height: 1;
+}
+
+.upload-file-remove:hover {
+  color: var(--foreground);
+  border-color: var(--primary);
+  background: var(--surface-1-hover);
+}
+
+.upload-file-waiting {
+  border-color: color-mix(in srgb, var(--primary) 42%, var(--border));
+  background: color-mix(in srgb, var(--primary) 8%, var(--background));
+}
+
+.upload-file-complete .file-progress span {
+  background: var(--success);
+}
+
+.upload-file-state {
+  grid-column: 1 / -1;
+  color: var(--muted-foreground);
+  font-size: 0.72rem;
+  text-align: right;
+}
+
+.upload-recovery-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 80;
+  display: grid;
+  place-items: center;
+  padding: 1rem;
+  background: color-mix(in srgb, var(--background) 72%, transparent);
+  backdrop-filter: blur(10px);
+}
+
+.upload-recovery-modal {
+  width: min(34rem, 100%);
+  box-shadow: var(--shadow-lg);
+}
+
+.upload-recovery-modal h2 {
+  margin: 0 0 0.65rem;
+  font-size: 1.35rem;
+}
+
+.upload-recovery-modal p {
+  margin: 0;
+  color: var(--muted-foreground);
+  line-height: 1.55;
+}
+
+.upload-recovery-actions {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 0.7rem;
+  margin-top: 1.25rem;
+}
+
+@media (max-width: 640px) {
+  .upload-recovery-actions {
+    grid-template-columns: 1fr;
+  }
+}
+
 .result-item small,
 .download-item small,
 .result-item code,

backend/static/css/40-docs.css

@@ -36,6 +36,22 @@
   font-size: 1rem;
 }
 
+.docs-card h3 {
+  margin: 1.35rem 0 0;
+  font-size: 0.9rem;
+  font-weight: 650;
+  color: var(--foreground);
+}
+
+/* Highlights where the API token goes in the ShareX config snippet. */
+.sxcu-highlight {
+  background: #fde047;
+  color: #1a1a1a;
+  font-weight: 700;
+  padding: 0 0.2rem;
+  border-radius: 3px;
+}
+
 .docs-card p {
   margin: 0.65rem 0 0;
   color: var(--muted-foreground);

backend/static/css/50-admin.css

@@ -1,11 +1,19 @@
 .admin-header,
 .table-header {
   display: flex;
+  min-width: 0;
   align-items: center;
   justify-content: space-between;
   gap: 1rem;
 }
 
+.admin-header > *,
+.table-header > *,
+.admin-grid-two > *,
+.logs-filter-card > * {
+  min-width: 0;
+}
+
 .kicker {
   margin: 0 0 0.4rem;
   color: var(--muted-foreground);
@@ -54,7 +62,8 @@
   white-space: nowrap;
 }
 
-.user-edit-metrics {
+.user-edit-metrics,
+.metric-grid-4 {
   grid-template-columns: repeat(4, minmax(0, 1fr));
 }
 
@@ -72,12 +81,15 @@
 }
 
 .admin-table-wrap {
+  max-width: 100%;
   overflow-x: auto;
   margin-top: 1rem;
+  -webkit-overflow-scrolling: touch;
 }
 
 .admin-table {
   width: 100%;
+  min-width: 46rem;
   border-collapse: collapse;
   font-size: 0.85rem;
 }
@@ -95,6 +107,204 @@
   font-weight: 650;
 }
 
+.sort-link {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.3rem;
+  color: var(--muted-foreground);
+  font-weight: 650;
+  text-decoration: none;
+}
+
+.sort-link:hover,
+.sort-link.is-sorted {
+  color: var(--foreground);
+}
+
+.sort-arrow {
+  font-size: 0.7rem;
+}
+
+.pagination {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 0.35rem;
+  margin-top: 1rem;
+}
+
+.pagination-summary {
+  margin: 0.6rem 0 0;
+  color: var(--muted-foreground);
+  font-size: 0.78rem;
+}
+
+.pagination-bar {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.75rem;
+  margin-top: 1rem;
+}
+
+.pagination-bar .pagination {
+  margin-top: 0;
+}
+
+.per-page-control {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.4rem;
+  margin: 0;
+  color: var(--muted-foreground);
+  font-size: 0.78rem;
+}
+
+.per-page-control select {
+  width: auto;
+  min-width: 4.5rem;
+  min-height: 2rem;
+  padding: 0.2rem 0.5rem;
+  font-size: 0.8rem;
+}
+
+.button.is-disabled {
+  pointer-events: none;
+  opacity: 0.45;
+}
+
+/* Overview charts */
+.admin-charts {
+  display: grid;
+  grid-template-columns: 2fr 1fr;
+  gap: 1rem;
+  margin-top: 1rem;
+}
+
+.chart-card {
+  min-width: 0;
+}
+
+.chart-card h2 {
+  margin: 0;
+  font-size: 1.05rem;
+}
+
+.chart-card .muted-copy {
+  margin: 0.3rem 0 0;
+}
+
+.bar-chart {
+  display: grid;
+  grid-template-columns: repeat(14, minmax(0, 1fr));
+  align-items: end;
+  gap: 0.4rem;
+  min-height: 13rem;
+  margin-top: 1.25rem;
+  padding-top: 0.5rem;
+}
+
+.bar-chart-col {
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+  align-items: stretch;
+  gap: 0.35rem;
+}
+
+.bar-chart-track {
+  display: flex;
+  align-items: flex-end;
+  justify-content: center;
+  flex: 1 1 auto;
+  width: 100%;
+  max-width: 1.8rem;
+  height: 150px;
+  margin: 0 auto;
+  border-bottom: 2px solid color-mix(in srgb, var(--primary, #8b5cf6) 75%, transparent);
+  border-radius: 0.45rem 0.45rem 0 0;
+  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--border) 55%, transparent));
+  overflow: hidden;
+}
+
+.bar-chart-bar {
+  display: block;
+  width: 100%;
+  min-height: 0;
+  border-radius: 6px 6px 0 0;
+  background: linear-gradient(180deg, var(--primary-hover, #7c3aed), var(--primary, #8b5cf6));
+  box-shadow: 0 0 18px color-mix(in srgb, var(--primary, #8b5cf6) 35%, transparent);
+}
+
+.bar-chart-value {
+  min-height: 1rem;
+  overflow: hidden;
+  color: var(--foreground);
+  font-size: 0.72rem;
+  font-weight: 650;
+  line-height: 1;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.bar-chart-label {
+  overflow: hidden;
+  color: var(--muted-foreground);
+  font-size: 0.66rem;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.stat-bars {
+  display: grid;
+  gap: 0.9rem;
+  margin-top: 1.25rem;
+}
+
+.stat-bar span {
+  display: flex;
+  justify-content: space-between;
+  color: var(--muted-foreground);
+  font-size: 0.78rem;
+}
+
+.stat-bar span strong {
+  color: var(--foreground);
+}
+
+.stat-bar-track {
+  display: block;
+  width: 100%;
+  margin-top: 0.35rem;
+  height: 0.55rem;
+  border-radius: 999px;
+  background: var(--border);
+  overflow: hidden;
+}
+
+.stat-bar-fill {
+  display: block;
+  height: 100%;
+  min-width: 0;
+  border-radius: 999px;
+  background: var(--primary, #8b5cf6);
+}
+
+@media (max-width: 900px) {
+  .admin-charts {
+    grid-template-columns: 1fr;
+  }
+}
+
+@media (max-width: 620px) {
+  .metric-grid-4 {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+
 .table-actions {
   display: flex;
   align-items: flex-start;
@@ -106,6 +316,75 @@
   margin: 0;
 }
 
+.logs-filter-card {
+  display: grid;
+  grid-template-columns: repeat(6, minmax(0, 1fr));
+  gap: 0.7rem;
+  align-items: end;
+  margin-top: 1rem;
+  padding: 1rem;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--card);
+}
+
+.logs-filter-card label {
+  display: grid;
+  gap: 0.25rem;
+  min-width: 0;
+}
+
+.logs-filter-card label span {
+  color: var(--muted-foreground);
+  font-size: 0.72rem;
+}
+
+.logs-table td {
+  vertical-align: top;
+}
+
+.logs-table code {
+  white-space: pre-wrap;
+  word-break: break-word;
+}
+
+.log-time {
+  white-space: nowrap;
+}
+
+.admin-grid-two {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 1rem;
+  margin-top: 1rem;
+}
+
+.compact-form {
+  display: grid;
+  gap: 0.75rem;
+}
+
+.compact-form textarea {
+  width: 100%;
+  resize: vertical;
+}
+
+@media (max-width: 980px) {
+  .admin-grid-two {
+    grid-template-columns: 1fr;
+  }
+
+  .logs-filter-card {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+
+@media (max-width: 620px) {
+  .logs-filter-card {
+    grid-template-columns: 1fr;
+  }
+}
+
 
 /* Inline row edit (details/summary in table cells) */
 .row-edit {
@@ -135,6 +414,7 @@
   display: flex;
   gap: 0.4rem;
   align-items: center;
+  flex-wrap: wrap;
   margin-top: 0.4rem;
 }
 

backend/static/css/60-storage.css

@@ -23,6 +23,7 @@
 
 .storage-card-header {
   display: flex;
+  min-width: 0;
   align-items: center;
   justify-content: space-between;
   gap: 1rem;
@@ -56,6 +57,10 @@
 
 .storage-card-name {
   display: block;
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
   font-size: 0.95rem;
   font-weight: 650;
   color: var(--foreground);
@@ -82,9 +87,15 @@
   flex-wrap: wrap;
 }
 
+.storage-card-actions form {
+  min-width: 0;
+  margin: 0;
+}
+
 /* View-mode summary */
 .storage-card-summary {
   display: flex;
+  min-width: 0;
   flex-wrap: wrap;
   gap: 0 1.75rem;
   padding: 0.65rem 1.1rem 0.9rem;
@@ -96,6 +107,7 @@
   flex-direction: column;
   gap: 0.15rem;
   min-width: 8rem;
+  max-width: 100%;
 }
 
 .storage-detail > span:first-child,
@@ -137,6 +149,14 @@
   align-items: end;
 }
 
+.storage-card-fields > *,
+.storage-ops-grid > *,
+.storage-result-row,
+.storage-result-row summary > *,
+.storage-result-detail > * {
+  min-width: 0;
+}
+
 .storage-card-fields label {
   display: grid;
   gap: 0.28rem;

backend/static/css/80-markdown-preview.css

@@ -0,0 +1,299 @@
+:root {
+  color-scheme: dark;
+  --md-bg: #0b0b16;
+  --md-fg: #f5f3ff;
+  --md-muted: #aaa4d6;
+  --md-panel: #17142d;
+  --md-panel-2: #211b3e;
+  --md-border: rgba(168, 150, 255, 0.24);
+  --md-link: #67e8f9;
+  --md-accent: #a78bfa;
+  --md-code-bg: #1b1724;
+  --md-block-code-bg: #0f111a;
+  --md-block-code-fg: #f8fafc;
+  --md-block-code-border: rgba(248, 250, 252, 0.16);
+  --md-shadow: rgba(0, 0, 0, 0.28);
+  --md-font: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  --md-mono: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
+}
+
+:root[data-theme="classic"] {
+  --md-bg: #09090b;
+  --md-fg: #fafafa;
+  --md-muted: #a1a1aa;
+  --md-panel: #18181b;
+  --md-panel-2: #27272a;
+  --md-border: rgba(255, 255, 255, 0.13);
+  --md-link: #e4e4e7;
+  --md-accent: #d4d4d8;
+  --md-code-bg: #111113;
+  --md-block-code-bg: #09090b;
+  --md-block-code-fg: #fafafa;
+  --md-block-code-border: rgba(250, 250, 250, 0.15);
+  --md-shadow: rgba(0, 0, 0, 0.3);
+}
+
+:root[data-theme="retro"] {
+  color-scheme: light;
+  --md-bg: #c0c0c0;
+  --md-fg: #000000;
+  --md-muted: #404040;
+  --md-panel: #ffffff;
+  --md-panel-2: #dfdfdf;
+  --md-border: #000000;
+  --md-link: #000078;
+  --md-accent: #000078;
+  --md-code-bg: #ffffff;
+  --md-block-code-bg: #000000;
+  --md-block-code-fg: #f5f5f5;
+  --md-block-code-border: #808080;
+  --md-shadow: transparent;
+  --md-font: "PixeloidSans", "PixelOperator", "Microsoft Sans Serif", Tahoma, sans-serif;
+  --md-mono: "PixelOperatorMono", Consolas, monospace;
+}
+
+:root[data-theme="gruvbox"] {
+  --md-bg: #1d2021;
+  --md-fg: #ebdbb2;
+  --md-muted: #bdae93;
+  --md-panel: #282828;
+  --md-panel-2: #32302f;
+  --md-border: rgba(235, 219, 178, 0.2);
+  --md-link: #fabd2f;
+  --md-accent: #d79921;
+  --md-code-bg: #1b1d1e;
+  --md-block-code-bg: #161819;
+  --md-block-code-fg: #fbf1c7;
+  --md-block-code-border: rgba(251, 241, 199, 0.18);
+  --md-shadow: rgba(0, 0, 0, 0.26);
+}
+
+:root[data-theme="cyberpunk"] {
+  --md-bg: #08070d;
+  --md-fg: #fff36f;
+  --md-muted: #9bfaff;
+  --md-panel: #16131f;
+  --md-panel-2: #251d34;
+  --md-border: rgba(255, 242, 0, 0.34);
+  --md-link: #00f0ff;
+  --md-accent: #ff2a6d;
+  --md-code-bg: #100d18;
+  --md-block-code-bg: #07060b;
+  --md-block-code-fg: #f8fafc;
+  --md-block-code-border: rgba(0, 240, 255, 0.26);
+  --md-shadow: rgba(255, 42, 109, 0.14);
+}
+
+@font-face {
+  font-family: "PixeloidSans";
+  src: url("/static/fonts/pixeloid_sans/PixeloidSans.ttf") format("truetype");
+  font-weight: normal;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: "PixeloidSans";
+  src: url("/static/fonts/pixeloid_sans/PixeloidSans-Bold.ttf") format("truetype");
+  font-weight: bold;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: "PixelOperatorMono";
+  src: url("/static/fonts/pixel_operator/PixelOperatorMono.ttf") format("truetype");
+  font-weight: normal;
+  font-display: swap;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html {
+  min-height: 100%;
+  background:
+    radial-gradient(circle at 18% -10%, color-mix(in srgb, var(--md-accent) 18%, transparent), transparent 24rem),
+    var(--md-bg);
+  color: var(--md-fg);
+  font-family: var(--md-font);
+}
+
+html[data-theme="retro"] {
+  background-color: #000000;
+  background-image: url("/static/backgrounds/stars1.gif");
+  background-repeat: repeat;
+  image-rendering: pixelated;
+}
+
+html[data-theme="cyberpunk"] {
+  background:
+    linear-gradient(rgba(255, 242, 0, 0.035) 1px, transparent 1px),
+    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
+    var(--md-bg);
+  background-size: 100% 3px, 3rem 100%, auto;
+}
+
+body {
+  min-height: 100vh;
+  margin: 0;
+  padding: clamp(1rem, 4vw, 2.25rem);
+  font-size: 16px;
+  line-height: 1.65;
+}
+
+main {
+  max-width: 54rem;
+  margin: 0 auto;
+  padding: clamp(1rem, 3vw, 2rem);
+  border: 1px solid var(--md-border);
+  border-radius: 10px;
+  background: color-mix(in srgb, var(--md-panel) 90%, transparent);
+  box-shadow: 0 20px 60px var(--md-shadow);
+}
+
+html[data-theme="retro"] main {
+  border-radius: 0;
+  background: var(--md-panel);
+  box-shadow:
+    inset -1px -1px 0 #404040,
+    inset 1px 1px 0 #ffffff,
+    inset -2px -2px 0 #808080,
+    inset 2px 2px 0 #dfdfdf;
+}
+
+html[data-theme="cyberpunk"] main {
+  border-radius: 0;
+  box-shadow: 4px 4px 0 rgba(255, 42, 109, 0.5), 0 0 24px rgba(0, 240, 255, 0.12);
+  clip-path: polygon(0 0, calc(100% - 0.9rem) 0, 100% 0.9rem, 100% 100%, 0.9rem 100%, 0 calc(100% - 0.9rem));
+}
+
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+  margin: 1.4em 0 0.55em;
+  color: var(--md-fg);
+  line-height: 1.2;
+}
+
+h1:first-child,
+h2:first-child,
+h3:first-child {
+  margin-top: 0;
+}
+
+h1 {
+  font-size: clamp(1.75rem, 5vw, 2.45rem);
+}
+
+h2 {
+  padding-bottom: 0.35rem;
+  border-bottom: 1px solid var(--md-border);
+  font-size: 1.45rem;
+}
+
+p,
+ul,
+ol,
+blockquote,
+pre,
+table {
+  margin: 0 0 1rem;
+}
+
+a {
+  color: var(--md-link);
+  text-underline-offset: 0.18em;
+}
+
+a:hover {
+  color: var(--md-accent);
+}
+
+img,
+video {
+  max-width: 100%;
+  height: auto;
+  border-radius: 8px;
+}
+
+html[data-theme="retro"] img,
+html[data-theme="retro"] video {
+  border-radius: 0;
+  image-rendering: pixelated;
+}
+
+hr {
+  height: 1px;
+  border: 0;
+  background: var(--md-border);
+}
+
+blockquote {
+  margin-left: 0;
+  padding: 0.75rem 1rem;
+  border-left: 4px solid var(--md-accent);
+  background: color-mix(in srgb, var(--md-panel-2) 58%, transparent);
+  color: var(--md-muted);
+}
+
+pre {
+  overflow: auto;
+  padding: 1rem;
+  border: 1px solid var(--md-block-code-border) !important;
+  border-radius: 8px;
+  background: var(--md-block-code-bg) !important;
+  color: var(--md-block-code-fg) !important;
+}
+
+code {
+  font-family: var(--md-mono);
+}
+
+pre code,
+pre > code,
+pre code[class*="language-"] {
+  padding: 0 !important;
+  border: 0 !important;
+  background: transparent !important;
+  color: inherit !important;
+}
+
+:not(pre) > code {
+  padding: 0.12rem 0.28rem;
+  border: 1px solid var(--md-border);
+  border-radius: 0.25rem;
+  background: color-mix(in srgb, var(--md-code-bg) 82%, transparent);
+}
+
+html[data-theme="retro"] pre,
+html[data-theme="retro"] :not(pre) > code {
+  border-radius: 0;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+}
+
+th,
+td {
+  padding: 0.5rem 0.65rem;
+  border: 1px solid var(--md-border);
+}
+
+th {
+  background: color-mix(in srgb, var(--md-panel-2) 70%, transparent);
+  color: var(--md-fg);
+}
+
+tr:nth-child(even) td {
+  background: color-mix(in srgb, var(--md-panel-2) 28%, transparent);
+}
+
+::selection {
+  background: var(--md-accent);
+  color: var(--md-bg);
+}

backend/static/css/90-responsive.css

@@ -1,12 +1,34 @@
 @media (max-width: 720px) {
-  .nav-links {
+  .nav {
-    display: inline-flex;
+    width: min(72rem, calc(100% - 1rem));
+    min-height: auto;
+    padding: 0.55rem 0;
+    align-items: flex-start;
     flex-wrap: wrap;
-    justify-content: flex-end;
+    gap: 0.55rem;
+  }
+
+  .brand {
+    flex: 1 1 auto;
+  }
+
+  .nav-links {
+    width: 100%;
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: stretch;
+    gap: 0.4rem;
+  }
+
+  .nav-links .button {
+    flex: 1 1 auto;
+    min-width: 0;
+    padding-inline: 0.55rem;
   }
 
   .upload-view,
   .download-view {
+    width: min(100%, calc(100% - 1rem));
     min-height: auto;
     padding: 2rem 0;
   }
@@ -37,6 +59,23 @@
 
   .app-sidebar {
     position: static;
+    width: 100%;
+    overflow: hidden;
+  }
+
+  .sidebar-nav {
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 0.35rem;
+  }
+
+  .sidebar-link {
+    justify-content: flex-start;
+    padding-inline: 0.65rem;
+  }
+
+  .sidebar-logout .button {
+    justify-content: center;
   }
 
   .endpoint-list div {
@@ -56,6 +95,41 @@
     flex: 1;
   }
 
+  .file-browser-toolbar {
+    align-items: stretch;
+  }
+
+  .file-browser-toolbar,
+  .file-browser-toolbar .view-toolbar {
+    width: 100%;
+  }
+
+  .file-browser-toolbar .view-toolbar .button,
+  .file-browser-toolbar > .button {
+    flex: 1 1 auto;
+    justify-content: center;
+  }
+
+  .file-browser-toolbar .view-toolbar .icon-button {
+    flex: 0 0 2.5rem;
+  }
+
+  .file-browser-head {
+    display: none;
+  }
+
+  .file-open {
+    grid-template-columns: 3rem minmax(0, 1fr) auto;
+  }
+
+  .file-type {
+    display: none;
+  }
+
+  .file-browser.is-list .file-card {
+    grid-template-columns: minmax(0, 1fr) minmax(7rem, auto);
+  }
+
   h1 {
     font-size: 1.65rem;
   }
@@ -86,9 +160,59 @@
   .new-collection-body {
     position: static;
     width: 100%;
+    max-width: 100%;
     margin-top: 0.5rem;
     box-shadow: none;
   }
+
+  .inline-controls {
+    align-items: stretch;
+  }
+
+  .inline-controls label,
+  .inline-controls input,
+  .inline-controls select,
+  .compact-input {
+    width: 100%;
+    min-width: 0;
+  }
+
+  .copy-field,
+  .token-reveal-row,
+  .storage-card-edit-bar {
+    flex-wrap: wrap;
+  }
+
+  .copy-field .button,
+  .token-reveal-row .button,
+  .storage-card-edit-bar .button {
+    flex: 1 1 auto;
+  }
+
+  .storage-card-header,
+  .storage-card-actions {
+    align-items: stretch;
+  }
+
+  .storage-card-header {
+    flex-direction: column;
+  }
+
+  .storage-card-actions,
+  .storage-card-actions form,
+  .storage-card-actions .button,
+  .storage-card-actions button {
+    width: 100%;
+  }
+
+  .storage-card-summary {
+    gap: 0.65rem;
+  }
+
+  .storage-detail {
+    min-width: 0;
+    width: 100%;
+  }
 }
 
 @media (max-width: 640px) {
@@ -96,3 +220,119 @@
     grid-template-columns: 1fr;
   }
 }
+
+@media (max-width: 520px) {
+  .app-shell {
+    width: min(100%, calc(100% - 1rem));
+    padding: 1rem 0;
+    gap: 1rem;
+  }
+
+  .card-content {
+    padding: 1rem;
+  }
+
+  .metric-grid,
+  .user-edit-metrics {
+    grid-template-columns: 1fr;
+  }
+
+  .storage-type-grid,
+  .storage-ops-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .result-item,
+  .download-item {
+    align-items: stretch;
+    flex-wrap: wrap;
+  }
+
+  .file-browser-titlebar {
+    align-items: flex-start;
+  }
+
+  .file-browser-titlebar > div:first-child {
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.1rem;
+  }
+
+  .file-browser {
+    padding: 0.25rem;
+  }
+
+  .file-open {
+    grid-template-columns: 2.65rem minmax(0, 1fr);
+    gap: 0.55rem;
+    padding: 0.5rem;
+  }
+
+  .file-media {
+    width: 2.65rem;
+    height: 2.65rem;
+  }
+
+  .file-size {
+    display: none;
+  }
+
+  .file-browser.is-list .file-card {
+    grid-template-columns: 1fr;
+    gap: 0.25rem;
+  }
+
+  .file-browser.is-list .file-reaction-dock {
+    justify-content: flex-end;
+    padding: 0 0.5rem 0.5rem;
+  }
+
+  .file-browser.is-thumbs {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    padding: 0.5rem;
+  }
+
+  .file-browser.is-thumbs .file-open {
+    height: 100%;
+  }
+
+  .file-actions,
+  .file-browser.is-thumbs .file-actions {
+    width: 100%;
+    display: grid;
+    grid-template-columns: 1fr;
+  }
+
+  .file-reaction-dock {
+    right: 0.5rem;
+    bottom: 0.45rem;
+  }
+
+  .reaction-button {
+    opacity: 1;
+    transform: none;
+  }
+
+  .file-progress-side {
+    width: 100%;
+  }
+
+  .site-footer {
+    width: min(100%, calc(100% - 1rem));
+  }
+}
+
+@media (max-width: 380px) {
+  .sidebar-nav {
+    grid-template-columns: 1fr;
+  }
+
+  .badge-row .badge {
+    flex: 1 1 100%;
+    justify-content: center;
+  }
+
+  .nav-links .button {
+    flex-basis: 100%;
+  }
+}

backend/static/file-icons/icon-map.json

@@ -0,0 +1,112 @@
+{
+  "_comment": "Maps a file's type (resolved from its extension / content type) to a file-type icon. 'standard' icons live in file-icons/standard, 'retro' (Win98) icons in file-icons/retro. The server reads this at startup and picks the icon per file; thumbnails always win over icons when present.",
+  "default": {
+    "mime": "application/octet-stream",
+    "standard": "txt-document-svgrepo-com.svg",
+    "retro": "shell32.dll_14_152-2.png"
+  },
+  "types": [
+    {
+      "mime": "image/*",
+      "standard": "image-document-svgrepo-com.svg",
+      "retro": "shimgvw.dll_14_1-2.png",
+      "extensions": ["png", "jpg", "jpeg", "gif", "webp", "bmp", "svg", "ico", "tif", "tiff", "heic", "heif", "avif", "jfif"]
+    },
+    {
+      "mime": "image/vnd.adobe.photoshop",
+      "standard": "psd-document-svgrepo-com.svg",
+      "retro": "shimgvw.dll_14_1-2.png",
+      "extensions": ["psd"]
+    },
+    {
+      "mime": "audio/*",
+      "standard": "audio-document-svgrepo-com.svg",
+      "retro": "wmploc.dll_14_610-2.png",
+      "extensions": ["mp3", "wav", "flac", "aac", "ogg", "oga", "m4a", "wma", "opus", "aiff", "aif", "mid", "midi"]
+    },
+    {
+      "mime": "video/mp4",
+      "standard": "mp4-document-svgrepo-com.svg",
+      "retro": "wmploc.dll_14_504-2.png",
+      "extensions": ["mp4", "m4v"]
+    },
+    {
+      "mime": "video/*",
+      "standard": "video-document-svgrepo-com.svg",
+      "retro": "wmploc.dll_14_504-2.png",
+      "extensions": ["mkv", "mov", "avi", "webm", "wmv", "flv", "mpg", "mpeg", "3gp", "ogv", "ts", "m2ts"]
+    },
+    {
+      "mime": "application/zip",
+      "standard": "zip-document-svgrepo-com.svg",
+      "retro": "zipfldr.dll_14_101-2.png",
+      "extensions": ["zip", "rar", "7z", "gz", "tar", "bz2", "xz", "tgz", "zst", "lz", "lzma", "cab", "iso"]
+    },
+    {
+      "mime": "application/pdf",
+      "standard": "pdf-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_152-2.png",
+      "extensions": ["pdf"]
+    },
+    {
+      "mime": "text/html",
+      "standard": "html-document-svgrepo-com.svg",
+      "retro": "mshtml.dll_14_2660-2.png",
+      "extensions": ["html", "htm", "xhtml", "mhtml"]
+    },
+    {
+      "mime": "application/x-shockwave-flash",
+      "standard": "flash-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_152-2.png",
+      "extensions": ["swf", "fla"]
+    },
+    {
+      "mime": "application/vnd.ms-excel",
+      "standard": "excel-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_151-2.png",
+      "extensions": ["xls", "xlsx", "xlsm", "ods"]
+    },
+    {
+      "mime": "text/csv",
+      "standard": "csv-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_151-2.png",
+      "extensions": ["csv", "tsv"]
+    },
+    {
+      "mime": "application/msword",
+      "standard": "word-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_2-0.png",
+      "extensions": ["doc", "docx", "odt"]
+    },
+    {
+      "mime": "application/rtf",
+      "standard": "rtf-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_2-0.png",
+      "extensions": ["rtf"]
+    },
+    {
+      "mime": "application/vnd.apple.pages",
+      "standard": "pages-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_2-0.png",
+      "extensions": ["pages"]
+    },
+    {
+      "mime": "application/vnd.visio",
+      "standard": "visio-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_152-2.png",
+      "extensions": ["vsd", "vsdx"]
+    },
+    {
+      "mime": "application/x-msdownload",
+      "standard": "exe-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_3-0.png",
+      "extensions": ["exe", "msi", "bat", "cmd", "com", "app", "dmg", "apk", "deb", "rpm", "appimage"]
+    },
+    {
+      "mime": "text/plain",
+      "standard": "txt-document-svgrepo-com.svg",
+      "retro": "shell32.dll_14_151-2.png",
+      "extensions": ["txt", "text", "log", "md", "markdown", "ini", "cfg", "conf", "json", "xml", "yaml", "yml", "toml", "js", "ts", "jsx", "tsx", "go", "py", "rb", "php", "java", "c", "h", "cpp", "cc", "cs", "rs", "sh", "bash", "css", "scss", "sql"]
+    }
+  ]
+}

backend/static/file-icons/standard/audio-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M5.151.012c-2.802 0-5.073 2.272-5.073 5.073v53.842c0 2.802 2.272 5.073 5.073 5.073h45.774c2.803 0 5.075-2.271 5.075-5.073v-38.606l-18.903-20.309h-31.946z" fill="#379FD3"/>
+
+<path d="M56 20.357v1h-12.8s-6.312-1.26-6.128-6.707c0 0 .208 5.707 6.003 5.707h12.925z" fill="#2987C8"/>

backend/static/file-icons/standard/csv-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<path d="M5.106 0c-2.802 0-5.073 2.272-5.073 5.074v53.841c0 2.803 2.271 5.074 5.073 5.074h45.774c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.903-20.31h-31.945z" fill-rule="evenodd" clip-rule="evenodd" fill="#45B058"/>
+
+<path d="M20.306 43.197c.126.144.198.324.198.522 0 .378-.306.72-.703.72-.18 0-.378-.072-.504-.234-.702-.846-1.891-1.387-3.007-1.387-2.629 0-4.627 2.017-4.627 4.88 0 2.845 1.999 4.879 4.627 4.879 1.134 0 2.25-.486 3.007-1.369.125-.144.324-.233.504-.233.415 0 .703.359.703.738 0 .18-.072.36-.198.504-.937.972-2.215 1.693-4.015 1.693-3.457 0-6.176-2.521-6.176-6.212s2.719-6.212 6.176-6.212c1.8.001 3.096.721 4.015 1.711zm6.802 10.714c-1.782 0-3.187-.594-4.213-1.495-.162-.144-.234-.342-.234-.54 0-.361.27-.757.702-.757.144 0 .306.036.432.144.828.739 1.98 1.314 3.367 1.314 2.143 0 2.827-1.152 2.827-2.071 0-3.097-7.112-1.386-7.112-5.672 0-1.98 1.764-3.331 4.123-3.331 1.548 0 2.881.467 3.853 1.278.162.144.252.342.252.54 0 .36-.306.72-.703.72-.144 0-.306-.054-.432-.162-.882-.72-1.98-1.044-3.079-1.044-1.44 0-2.467.774-2.467 1.909 0 2.701 7.112 1.152 7.112 5.636.001 1.748-1.187 3.531-4.428 3.531zm16.994-11.254l-4.159 10.335c-.198.486-.685.81-1.188.81h-.036c-.522 0-1.008-.324-1.207-.81l-4.142-10.335c-.036-.09-.054-.18-.054-.288 0-.36.323-.793.81-.793.306 0 .594.18.72.486l3.889 9.992 3.889-9.992c.108-.288.396-.486.72-.486.468 0 .81.378.81.793.001.09-.017.198-.052.288z" fill="#ffffff"/>
+
+<g fill-rule="evenodd" clip-rule="evenodd">

backend/static/file-icons/standard/excel-document-svgrepo-com.svg

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?><!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg"><path d="M5.112.006c-2.802 0-5.073 2.273-5.073 5.074v53.841c0 2.803 2.271 5.074 5.073 5.074h45.774c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.902-20.31h-31.946z" fill-rule="evenodd" clip-rule="evenodd" fill="#45B058"/><path d="M19.429 53.938c-.216 0-.415-.09-.54-.27l-3.728-4.97-3.745 4.97c-.126.18-.324.27-.54.27-.396 0-.72-.306-.72-.72 0-.144.035-.306.144-.432l3.89-5.131-3.619-4.826c-.09-.126-.145-.27-.145-.414 0-.342.288-.72.721-.72.216 0 .432.108.576.288l3.438 4.628 3.438-4.646c.127-.18.324-.27.541-.27.378 0 .738.306.738.72 0 .144-.036.288-.127.414l-3.619 4.808 3.891 5.149c.09.126.125.27.125.414 0 .396-.324.738-.719.738zm9.989-.126h-5.455c-.595 0-1.081-.486-1.081-1.08v-10.317c0-.396.324-.72.774-.72.396 0 .721.324.721.72v10.065h5.041c.359 0 .648.288.648.648 0 .396-.289.684-.648.684zm6.982.216c-1.782 0-3.188-.594-4.213-1.495-.162-.144-.234-.342-.234-.54 0-.36.27-.756.702-.756.144 0 .306.036.433.144.828.738 1.98 1.314 3.367 1.314 2.143 0 2.826-1.152 2.826-2.071 0-3.097-7.111-1.386-7.111-5.672 0-1.98 1.764-3.331 4.123-3.331 1.548 0 2.881.468 3.853 1.278.162.144.253.342.253.54 0 .36-.307.72-.703.72-.145 0-.307-.054-.432-.162-.883-.72-1.98-1.044-3.079-1.044-1.44 0-2.467.774-2.467 1.909 0 2.701 7.112 1.152 7.112 5.636 0 1.748-1.188 3.53-4.43 3.53z" fill="#ffffff"/><path d="M55.953 20.352v1h-12.801s-6.312-1.26-6.127-6.707c0 0 .207 5.707 6.002 5.707h12.926z" fill-rule="evenodd" clip-rule="evenodd" fill="#349C42"/><path d="M37.049 0v14.561c0 1.656 1.104 5.791 6.104 5.791h12.801l-18.905-20.352z" opacity=".5" fill-rule="evenodd" clip-rule="evenodd" fill="#ffffff"/></svg>

backend/static/file-icons/standard/exe-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<path d="M5.112.025c-2.802 0-5.073 2.272-5.073 5.074v53.841c0 2.803 2.271 5.074 5.073 5.074h45.774c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.902-20.31h-31.946z" fill-rule="evenodd" clip-rule="evenodd" fill="#8199AF"/>
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M55.961 20.377v1h-12.799s-6.312-1.26-6.129-6.708c0 0 .208 5.708 6.004 5.708h12.924z" fill="#617F9B"/>

backend/static/file-icons/standard/flash-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<path d="M5.112.009c-2.802 0-5.073 2.273-5.073 5.074v53.841c0 2.803 2.271 5.074 5.073 5.074h45.775c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.904-20.31h-31.945z" fill-rule="evenodd" clip-rule="evenodd" fill="#E53C3C"/>
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M55.961 20.346v1h-12.799s-6.312-1.26-6.129-6.707c0 0 .208 5.707 6.004 5.707h12.924z" fill="#DE2D2D"/>

backend/static/file-icons/standard/html-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<path d="M5.135.008c-2.803 0-5.074 2.272-5.074 5.074v53.84c0 2.803 2.271 5.074 5.074 5.074h45.775c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.903-20.309h-31.946z" fill-rule="evenodd" clip-rule="evenodd" fill="#F7622C"/>
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M55.976 20.352v1h-12.799s-6.312-1.26-6.129-6.707c0 0 .208 5.707 6.004 5.707h12.924z" fill="#F54921"/>

backend/static/file-icons/standard/image-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M5.125.042c-2.801 0-5.072 2.273-5.072 5.074v53.841c0 2.803 2.271 5.073 5.072 5.073h45.775c2.801 0 5.074-2.271 5.074-5.073v-38.604l-18.904-20.311h-31.945z" fill="#49C9A7"/>
+
+<path d="M55.977 20.352v1h-12.799s-6.312-1.26-6.129-6.707c0 0 .208 5.707 6.004 5.707h12.924z" fill="#37BB91"/>

backend/static/file-icons/standard/mp4-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M5.116.006c-2.801 0-5.072 2.272-5.072 5.074v53.841c0 2.803 2.271 5.074 5.072 5.074h45.775c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.903-20.31h-31.946z" fill="#9B64B2"/>
+
+<path d="M55.977 20.352v1h-12.799s-6.312-1.26-6.129-6.707c0 0 .208 5.707 6.004 5.707h12.924z" fill="#824B9E"/>

backend/static/file-icons/standard/pages-document-svgrepo-com.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg width="800px" height="800px" viewBox="-4 0 64 64" xmlns="http://www.w3.org/2000/svg">
+
+<path d="M5.111-.006c-2.801 0-5.072 2.272-5.072 5.074v53.841c0 2.803 2.271 5.074 5.072 5.074h45.775c2.801 0 5.074-2.271 5.074-5.074v-38.605l-18.903-20.31h-31.946z" fill-rule="evenodd" clip-rule="evenodd" fill="#6A6AE2"/>
+
+<g fill-rule="evenodd" clip-rule="evenodd">
+
+<path d="M55.976 20.352v1h-12.799s-6.312-1.26-6.129-6.707c0 0 .208 5.707 6.004 5.707h12.924z" fill="#4F4FDA"/>

backend/static/file-icons/standard/pdf-document-svgrepo-com.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg xmlns="http://www.w3.org/2000/svg" 
+	 width="800px" height="800px" viewBox="0 0 56 64" enable-background="new 0 0 56 64" xml:space="preserve">
+<g>
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