feat: add admin console, cleanup, and thumbnail workers

- Implement a token-authenticated admin console at `/admin` with overview metrics and file management. - Add a background worker to periodically clean up expired boxes based on `WARPBOX_CLEANUP_EVERY`. - Add a background worker to generate image and video thumbnails based on `WARPBOX_THUMBNAIL_EVERY`. - Update file storage paths to use `@each@` and `@thumb@` prefixes to separate original files from thumbnails. - Add severity fields to startup logs and update configuration templates.
2026-05-25 16:52:57 +03:00
parent e12878887c
commit 26619bacbc
28 changed files with 1576 additions and 178 deletions
--- a/.env.example
+++ b/.env.example
@@ -3,6 +3,9 @@ WARPBOX_ENV=development
 WARPBOX_ADDR=:8080
 WARPBOX_BASE_URL=http://localhost:8080
 WARPBOX_DATA_DIR=./data
+WARPBOX_ADMIN_TOKEN=change-me
+WARPBOX_CLEANUP_EVERY=1h
+WARPBOX_THUMBNAIL_EVERY=1m
 WARPBOX_MAX_UPLOAD_SIZE_MB=2048
 WARPBOX_READ_TIMEOUT=15s
 WARPBOX_WRITE_TIMEOUT=60s
--- a/README.md
+++ b/README.md
@@ -16,6 +16,8 @@ Fractions are supported, so `0.5Mb` is 512 KiB and `1.5Mb` is 1536 KiB.
 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.

+The basic admin console is available at `/admin`. Set `WARPBOX_ADMIN_TOKEN` and use that value to sign in.
+
 For one-off Go commands, run them from the backend module:

 ```bash
@@ -39,11 +41,20 @@ go run ./cmd/warpbox
 - `scripts/env/dev.env.example` - tracked development environment template.
 - `scripts/env/dev.env` - local development environment, ignored by git.

+## 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 are cleaned on startup and then every `WARPBOX_CLEANUP_EVERY`.
+- Missing image/video thumbnails are generated in a background worker every `WARPBOX_THUMBNAIL_EVERY`.
+
 ## Runtime Data

 Warpbox keeps local runtime data under the configured data directory:

- `data/files/{box_id}/{file_id}.ext` - uploaded file contents.
+- `data/files/{box_id}/@each@{file_id}.ext` - uploaded file contents.
+- `data/files/{box_id}/@thumb@{file_id}.jpg` - generated previews where available.
 - `data/db/warpbox.bbolt` - bbolt metadata database for boxes and file records.
 - `data/logs/{YYYY-MM-DD}.log` - JSONL logs, one event per line.

--- a/backend/cmd/warpbox/main.go
+++ b/backend/cmd/warpbox/main.go
@@ -30,13 +30,13 @@ func main() {

 	server, err := httpserver.New(cfg, logger)
 	if err != nil {
-		logger.Error("failed to create server", "source", "startup", "error", err.Error())
+		logger.Error("failed to create server", "source", "startup", "severity", "error", "error", err.Error())
 		os.Exit(1)
 	}

 	errs := make(chan error, 1)
 	go func() {
-		logger.Info("warpbox server starting", "source", "startup", "addr", cfg.Addr, "env", cfg.Environment)
+		logger.Info("warpbox server starting", "source", "startup", "severity", "dev", "addr", cfg.Addr, "env", cfg.Environment)
 		errs <- server.ListenAndServe()
 	}()

@@ -46,18 +46,18 @@ func main() {
 	select {
 	case err := <-errs:
 		if err != nil && !errors.Is(err, http.ErrServerClosed) {
-			logger.Error("server stopped unexpectedly", "source", "startup", "error", err.Error())
+			logger.Error("server stopped unexpectedly", "source", "startup", "severity", "error", "error", err.Error())
 			os.Exit(1)
 		}
 	case sig := <-shutdown:
-		logger.Info("shutdown signal received", "source", "startup", "signal", sig.String())
+		logger.Info("shutdown signal received", "source", "startup", "severity", "dev", "signal", sig.String())
 		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 		defer cancel()

 		if err := server.Shutdown(ctx); err != nil {
-			logger.Error("graceful shutdown failed", "source", "startup", "error", err.Error())
+			logger.Error("graceful shutdown failed", "source", "startup", "severity", "error", "error", err.Error())
 			os.Exit(1)
 		}
-		logger.Info("server stopped", "source", "startup")
+		logger.Info("server stopped", "source", "startup", "severity", "dev")
 	}
 }
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -2,6 +2,9 @@ module warpbox.dev/backend

 go 1.26

-require go.etcd.io/bbolt v1.4.3
+require (
+	go.etcd.io/bbolt v1.4.3
+	golang.org/x/image v0.41.0
+)

 require golang.org/x/sys v0.29.0 // indirect
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -6,6 +6,8 @@ github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOf
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.etcd.io/bbolt v1.4.3 h1:dEadXpI6G79deX5prL3QRNP6JB8UxVkqo4UPnHaNXJo=
 go.etcd.io/bbolt v1.4.3/go.mod h1:tKQlpPaYCVFctUIgFKFnAlvbmB3tpy1vkTnDWohtc0E=
+golang.org/x/image v0.41.0 h1:8wS72eGJMJaBxK6okTzd4WaXumUlTVlb753MlsSvTCo=
+golang.org/x/image v0.41.0/go.mod h1:uIc348UZMSvS5Z65CVZ7iDPaNobNFEPeJ4kbqTOszmA=
 golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
--- a/backend/libs/config/config.go
+++ b/backend/libs/config/config.go
@@ -11,32 +11,38 @@ import (
 )

 type Config struct {
-	AppName       string
-	Environment   string
-	Addr          string
-	BaseURL       string
-	DataDir       string
-	StaticDir     string
-	TemplateDir   string
-	ReadTimeout   time.Duration
-	WriteTimeout  time.Duration
-	IdleTimeout   time.Duration
-	MaxUploadSize int64
+	AppName        string
+	Environment    string
+	Addr           string
+	BaseURL        string
+	DataDir        string
+	AdminToken     string
+	StaticDir      string
+	TemplateDir    string
+	ReadTimeout    time.Duration
+	WriteTimeout   time.Duration
+	IdleTimeout    time.Duration
+	CleanupEvery   time.Duration
+	ThumbnailEvery time.Duration
+	MaxUploadSize  int64
 }

 func Load() (Config, error) {
 	cfg := Config{
-		AppName:       envString("WARPBOX_APP_NAME", "warpbox.dev"),
-		Environment:   envString("WARPBOX_ENV", "development"),
-		Addr:          envString("WARPBOX_ADDR", ":8080"),
-		BaseURL:       strings.TrimRight(envString("WARPBOX_BASE_URL", "http://localhost:8080"), "/"),
-		DataDir:       envString("WARPBOX_DATA_DIR", defaultPath("data")),
-		StaticDir:     envString("WARPBOX_STATIC_DIR", defaultPath("static")),
-		TemplateDir:   envString("WARPBOX_TEMPLATE_DIR", defaultPath("templates")),
-		ReadTimeout:   envDuration("WARPBOX_READ_TIMEOUT", 15*time.Second),
-		WriteTimeout:  envDuration("WARPBOX_WRITE_TIMEOUT", 60*time.Second),
-		IdleTimeout:   envDuration("WARPBOX_IDLE_TIMEOUT", 120*time.Second),
-		MaxUploadSize: envMegabytes("WARPBOX_MAX_UPLOAD_SIZE_MB", 2048), // 2 GiB default.
+		AppName:        envString("WARPBOX_APP_NAME", "warpbox.dev"),
+		Environment:    envString("WARPBOX_ENV", "development"),
+		Addr:           envString("WARPBOX_ADDR", ":8080"),
+		BaseURL:        strings.TrimRight(envString("WARPBOX_BASE_URL", "http://localhost:8080"), "/"),
+		DataDir:        envString("WARPBOX_DATA_DIR", defaultPath("data")),
+		AdminToken:     envString("WARPBOX_ADMIN_TOKEN", ""),
+		StaticDir:      envString("WARPBOX_STATIC_DIR", defaultPath("static")),
+		TemplateDir:    envString("WARPBOX_TEMPLATE_DIR", defaultPath("templates")),
+		ReadTimeout:    envDuration("WARPBOX_READ_TIMEOUT", 15*time.Second),
+		WriteTimeout:   envDuration("WARPBOX_WRITE_TIMEOUT", 60*time.Second),
+		IdleTimeout:    envDuration("WARPBOX_IDLE_TIMEOUT", 120*time.Second),
+		CleanupEvery:   envDuration("WARPBOX_CLEANUP_EVERY", time.Hour),
+		ThumbnailEvery: envDuration("WARPBOX_THUMBNAIL_EVERY", time.Minute),
+		MaxUploadSize:  envMegabytes("WARPBOX_MAX_UPLOAD_SIZE_MB", 2048), // 2 GiB default.
 	}

 	if cfg.BaseURL == "" {
--- a/backend/libs/handlers/admin.go
+++ b/backend/libs/handlers/admin.go
@@ -0,0 +1,198 @@
+package handlers
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"net/http"
+	"time"
+
+	"warpbox.dev/backend/libs/services"
+	"warpbox.dev/backend/libs/web"
+)
+
+const adminCookieName = "warpbox_admin"
+
+type adminPageData struct {
+	Stats services.AdminStats
+	Boxes []adminBoxView
+	Error string
+}
+
+type adminBoxView struct {
+	ID             string
+	CreatedAt      string
+	ExpiresAt      string
+	FileCount      int
+	TotalSizeLabel string
+	DownloadCount  int
+	MaxDownloads   int
+	Protected      bool
+	Expired        bool
+}
+
+func (a *App) AdminLogin(w http.ResponseWriter, r *http.Request) {
+	if a.isAdmin(r) {
+		http.Redirect(w, r, "/admin", http.StatusSeeOther)
+		return
+	}
+	a.renderAdminLogin(w, http.StatusOK, "")
+}
+
+func (a *App) AdminLoginPost(w http.ResponseWriter, r *http.Request) {
+	if err := r.ParseForm(); err != nil {
+		a.renderAdminLogin(w, http.StatusBadRequest, "Unable to read login form.")
+		return
+	}
+	if a.cfg.AdminToken == "" || r.FormValue("token") != a.cfg.AdminToken {
+		a.logger.Warn("admin login failed", "source", "admin", "severity", "warn", "code", 4301)
+		a.renderAdminLogin(w, http.StatusUnauthorized, "Invalid admin token.")
+		return
+	}
+
+	http.SetCookie(w, &http.Cookie{
+		Name:     adminCookieName,
+		Value:    adminCookieValue(a.cfg.AdminToken),
+		Path:     "/admin",
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		Secure:   r.TLS != nil,
+		Expires:  time.Now().Add(12 * time.Hour),
+	})
+	a.logger.Info("admin login", "source", "admin", "severity", "user_activity", "code", 2301)
+	http.Redirect(w, r, "/admin", http.StatusSeeOther)
+}
+
+func (a *App) AdminLogout(w http.ResponseWriter, r *http.Request) {
+	http.SetCookie(w, &http.Cookie{
+		Name:     adminCookieName,
+		Value:    "",
+		Path:     "/admin",
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		MaxAge:   -1,
+	})
+	http.Redirect(w, r, "/admin/login", http.StatusSeeOther)
+}
+
+func (a *App) AdminDashboard(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.adminBoxes(8)
+	if err != nil {
+		http.Error(w, "unable to load recent boxes", http.StatusInternalServerError)
+		return
+	}
+
+	a.renderer.Render(w, http.StatusOK, "admin.html", web.PageData{
+		Title:       "Admin overview",
+		Description: "Warpbox admin overview.",
+		Data: adminPageData{
+			Stats: stats,
+			Boxes: boxes,
+		},
+	})
+}
+
+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.adminBoxes(100)
+	if err != nil {
+		http.Error(w, "unable to load boxes", http.StatusInternalServerError)
+		return
+	}
+
+	a.renderer.Render(w, http.StatusOK, "admin.html", web.PageData{
+		Title:       "Admin files",
+		Description: "Manage Warpbox uploads.",
+		Data: adminPageData{
+			Stats: stats,
+			Boxes: boxes,
+		},
+	})
+}
+
+func (a *App) AdminDeleteBox(w http.ResponseWriter, r *http.Request) {
+	if !a.requireAdmin(w, r) {
+		return
+	}
+
+	boxID := r.PathValue("boxID")
+	if err := a.uploadService.DeleteBox(boxID); err != nil {
+		a.logger.Warn("admin delete failed", "source", "admin", "severity", "warn", "code", 4302, "box_id", boxID, "error", err.Error())
+		http.Error(w, "unable to delete box", http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, "/admin/files", http.StatusSeeOther)
+}
+
+func (a *App) renderAdminLogin(w http.ResponseWriter, status int, message string) {
+	a.renderer.Render(w, status, "admin_login.html", web.PageData{
+		Title:       "Admin login",
+		Description: "Sign in to the Warpbox admin console.",
+		Data: adminPageData{
+			Error: message,
+		},
+	})
+}
+
+func (a *App) adminBoxes(limit int) ([]adminBoxView, error) {
+	boxes, err := a.uploadService.AdminBoxes(limit)
+	if err != nil {
+		return nil, err
+	}
+
+	rows := make([]adminBoxView, 0, len(boxes))
+	for _, box := range boxes {
+		rows = append(rows, adminBoxView{
+			ID:             box.ID,
+			CreatedAt:      box.CreatedAt.Format("Jan 2 15:04"),
+			ExpiresAt:      box.ExpiresAt.Format("Jan 2 15:04"),
+			FileCount:      box.FileCount,
+			TotalSizeLabel: box.TotalSizeLabel,
+			DownloadCount:  box.DownloadCount,
+			MaxDownloads:   box.MaxDownloads,
+			Protected:      box.Protected,
+			Expired:        box.Expired,
+		})
+	}
+	return rows, nil
+}
+
+func (a *App) requireAdmin(w http.ResponseWriter, r *http.Request) bool {
+	if a.isAdmin(r) {
+		return true
+	}
+	http.Redirect(w, r, "/admin/login", http.StatusSeeOther)
+	return false
+}
+
+func (a *App) isAdmin(r *http.Request) bool {
+	if a.cfg.AdminToken == "" {
+		return false
+	}
+	cookie, err := r.Cookie(adminCookieName)
+	if err != nil {
+		return false
+	}
+	return cookie.Value == adminCookieValue(a.cfg.AdminToken)
+}
+
+func adminCookieValue(token string) string {
+	sum := sha256.Sum256([]byte("warpbox-admin:" + token))
+	return hex.EncodeToString(sum[:])
+}
--- a/backend/libs/handlers/app.go
+++ b/backend/libs/handlers/app.go
@@ -27,9 +27,18 @@ func NewApp(cfg config.Config, logger *slog.Logger, renderer *web.Renderer, uplo

 func (a *App) RegisterRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("GET /", a.Home)
+	mux.HandleFunc("GET /admin/login", a.AdminLogin)
+	mux.HandleFunc("POST /admin/login", a.AdminLoginPost)
+	mux.HandleFunc("POST /admin/logout", a.AdminLogout)
+	mux.HandleFunc("GET /admin", a.AdminDashboard)
+	mux.HandleFunc("GET /admin/files", a.AdminFiles)
+	mux.HandleFunc("POST /admin/boxes/{boxID}/delete", a.AdminDeleteBox)
 	mux.HandleFunc("GET /d/{boxID}", a.DownloadPage)
+	mux.HandleFunc("POST /d/{boxID}/unlock", a.UnlockBox)
 	mux.HandleFunc("GET /d/{boxID}/zip", a.DownloadZip)
 	mux.HandleFunc("GET /d/{boxID}/f/{fileID}", a.DownloadFile)
+	mux.HandleFunc("GET /d/{boxID}/f/{fileID}/download", a.DownloadFileContent)
+	mux.HandleFunc("GET /d/{boxID}/thumb/{fileID}", a.Thumbnail)
 	mux.HandleFunc("GET /healthz", a.Health)
 	mux.HandleFunc("GET /api/v1/health", a.Health)
 	mux.HandleFunc("POST /api/v1/upload", a.Upload)
--- a/backend/libs/handlers/download.go
+++ b/backend/libs/handlers/download.go
@@ -5,9 +5,12 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"path/filepath"
+	"strings"
 	"time"

 	"warpbox.dev/backend/libs/helpers"
+	"warpbox.dev/backend/libs/services"
 	"warpbox.dev/backend/libs/web"
 )

@@ -15,6 +18,9 @@ type downloadPageData struct {
 	Box           boxView
 	Files         []fileView
 	ZipURL        string
+	Locked        bool
+	Obfuscated    bool
+	CanPreview    bool
 	DownloadCount int
 	MaxDownloads  int
 	ExpiresLabel  string
@@ -25,11 +31,21 @@ type boxView struct {
 }

 type fileView struct {
-	ID          string
-	Name        string
-	Size        string
-	ContentType string
-	URL         string
+	ID           string
+	Name         string
+	Size         string
+	ContentType  string
+	PreviewKind  string
+	URL          string
+	DownloadURL  string
+	ThumbnailURL string
+}
+
+type previewPageData struct {
+	Box         boxView
+	File        fileView
+	Locked      bool
+	DownloadURL string
 }

 func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
@@ -39,7 +55,7 @@ func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := a.uploadService.CanDownload(box); err != nil {
-		a.renderer.Render(w, http.StatusForbidden, "download.gohtml", web.PageData{
+		a.renderer.Render(w, http.StatusForbidden, "download.html", web.PageData{
 			Title:       "Download unavailable",
 			Description: "This Warpbox link is no longer available.",
 			Data: downloadPageData{
@@ -49,25 +65,24 @@ func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
 		})
 		return
 	}
+	locked := a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box)

 	files := make([]fileView, 0, len(box.Files))
-	for _, file := range box.Files {
-		files = append(files, fileView{
-			ID:          file.ID,
-			Name:        file.Name,
-			Size:        helpers.FormatBytes(file.Size),
-			ContentType: file.ContentType,
-			URL:         fmt.Sprintf("/d/%s/f/%s", box.ID, file.ID),
-		})
+	if !(locked && box.Obfuscate) {
+		for _, file := range box.Files {
+			files = append(files, a.fileView(box, file))
+		}
 	}

-	a.renderer.Render(w, http.StatusOK, "download.gohtml", web.PageData{
+	a.renderer.Render(w, http.StatusOK, "download.html", web.PageData{
 		Title:       "Download files",
 		Description: "Download files shared through Warpbox.",
 		Data: downloadPageData{
 			Box:           boxView{ID: box.ID},
 			Files:         files,
 			ZipURL:        fmt.Sprintf("/d/%s/zip", box.ID),
+			Locked:        locked,
+			Obfuscated:    box.Obfuscate,
 			DownloadCount: box.DownloadCount,
 			MaxDownloads:  box.MaxDownloads,
 			ExpiresLabel:  box.ExpiresAt.Format("Jan 2, 2006 15:04 MST"),
@@ -76,22 +91,114 @@ func (a *App) DownloadPage(w http.ResponseWriter, r *http.Request) {
 }

 func (a *App) DownloadFile(w http.ResponseWriter, r *http.Request) {
+	box, file, ok := a.loadFileForRequest(w, r)
+	if !ok {
+		return
+	}
+
+	locked := a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box)
+	view := a.fileView(box, file)
+	title := file.Name
+	description := fmt.Sprintf("%s shared via Warpbox", helpers.FormatBytes(file.Size))
+	imageURL := absoluteURL(r, view.ThumbnailURL)
+	if locked && box.Obfuscate {
+		title = "Protected Warpbox file"
+		description = "This shared file is password protected."
+		imageURL = absoluteURL(r, "/static/img/file-placeholder.webp")
+	}
+
+	a.renderer.Render(w, http.StatusOK, "preview.html", web.PageData{
+		Title:       title,
+		Description: description,
+		ImageURL:    imageURL,
+		Data: previewPageData{
+			Box:         boxView{ID: box.ID},
+			File:        view,
+			Locked:      locked,
+			DownloadURL: view.DownloadURL,
+		},
+	})
+}
+
+func (a *App) DownloadFileContent(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
+	}
+
+	a.serveFileContent(w, r, box, file, r.URL.Query().Get("inline") != "1")
+}
+
+func (a *App) Thumbnail(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) {
+		http.ServeFile(w, r, filepath.Join(a.cfg.StaticDir, "img", "file-placeholder.webp"))
+		return
+	}
+
+	path := a.uploadService.ThumbnailPath(box, file)
+	if path == "" {
+		http.ServeFile(w, r, filepath.Join(a.cfg.StaticDir, "img", "file-placeholder.webp"))
+		return
+	}
+	http.ServeFile(w, r, path)
+}
+
+func (a *App) UnlockBox(w http.ResponseWriter, r *http.Request) {
 	box, err := a.uploadService.GetBox(r.PathValue("boxID"))
 	if err != nil {
 		http.NotFound(w, r)
 		return
 	}
+	if err := r.ParseForm(); err != nil {
+		http.Redirect(w, r, fmt.Sprintf("/d/%s", box.ID), http.StatusSeeOther)
+		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)
+		http.Redirect(w, r, fmt.Sprintf("/d/%s", box.ID), http.StatusSeeOther)
+		return
+	}
+	http.SetCookie(w, &http.Cookie{
+		Name:     unlockCookieName(box.ID),
+		Value:    a.uploadService.UnlockToken(box),
+		Path:     "/d/" + box.ID,
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		Secure:   r.TLS != nil,
+		Expires:  box.ExpiresAt,
+	})
+	a.logger.Info("box unlocked", "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 {
+		http.NotFound(w, r)
+		return services.Box{}, services.File{}, false
+	}
 	if err := a.uploadService.CanDownload(box); err != nil {
 		http.Error(w, err.Error(), statusForDownloadError(err))
-		return
+		return services.Box{}, services.File{}, false
 	}

 	file, err := a.uploadService.FindFile(box, r.PathValue("fileID"))
 	if err != nil {
 		http.NotFound(w, r)
-		return
+		return services.Box{}, services.File{}, false
 	}
+	return box, file, true
+}

+func (a *App) serveFileContent(w http.ResponseWriter, r *http.Request, box services.Box, file services.File, attachment bool) {
 	path := a.uploadService.FilePath(box, file)
 	source, err := os.Open(path)
 	if err != nil {
@@ -107,11 +214,13 @@ func (a *App) DownloadFile(w http.ResponseWriter, r *http.Request) {
 	}

 	w.Header().Set("Content-Type", file.ContentType)
-	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%q", file.Name))
+	if attachment {
+		w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%q", file.Name))
+	}
 	http.ServeContent(w, r, file.Name, stat.ModTime(), source)

 	if err := a.uploadService.RecordDownload(box.ID); err != nil && !errors.Is(err, os.ErrNotExist) {
-		a.logger.Warn("failed to record file download", "source", "download", "code", 4002, "box_id", box.ID, "error", err.Error())
+		a.logger.Warn("failed to record file download", "source", "download", "severity", "warn", "code", 4002, "box_id", box.ID, "error", err.Error())
 	}
 }

@@ -125,16 +234,59 @@ func (a *App) DownloadZip(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, err.Error(), statusForDownloadError(err))
 		return
 	}
+	if a.uploadService.IsProtected(box) && !a.isBoxUnlocked(r, box) {
+		http.Error(w, "password required", http.StatusUnauthorized)
+		return
+	}

 	w.Header().Set("Content-Type", "application/zip")
 	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%q", "warpbox-"+box.ID+".zip"))
 	w.Header().Set("Last-Modified", time.Now().UTC().Format(http.TimeFormat))

 	if err := a.uploadService.WriteZip(w, box); err != nil {
-		a.logger.Error("zip download failed", "source", "download", "code", 5002, "box_id", box.ID, "error", err.Error())
+		a.logger.Error("zip download failed", "source", "download", "severity", "error", "code", 5002, "box_id", box.ID, "error", err.Error())
 		return
 	}
 	if err := a.uploadService.RecordDownload(box.ID); err != nil && !errors.Is(err, os.ErrNotExist) {
-		a.logger.Warn("failed to record zip download", "source", "download", "code", 4003, "box_id", box.ID, "error", err.Error())
+		a.logger.Warn("failed to record zip download", "source", "download", "severity", "warn", "code", 4003, "box_id", box.ID, "error", err.Error())
 	}
 }
+
+func (a *App) fileView(box services.Box, file services.File) fileView {
+	return fileView{
+		ID:           file.ID,
+		Name:         file.Name,
+		Size:         helpers.FormatBytes(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),
+	}
+}
+
+func (a *App) isBoxUnlocked(r *http.Request, box services.Box) bool {
+	if !a.uploadService.IsProtected(box) {
+		return true
+	}
+	cookie, err := r.Cookie(unlockCookieName(box.ID))
+	if err != nil {
+		return false
+	}
+	return cookie.Value == a.uploadService.UnlockToken(box)
+}
+
+func unlockCookieName(boxID string) string {
+	return "warpbox_unlock_" + strings.NewReplacer("-", "_", ".", "_").Replace(boxID)
+}
+
+func absoluteURL(r *http.Request, path string) string {
+	if strings.HasPrefix(path, "http://") || strings.HasPrefix(path, "https://") {
+		return path
+	}
+	scheme := "http"
+	if r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https" {
+		scheme = "https"
+	}
+	return fmt.Sprintf("%s://%s%s", scheme, r.Host, path)
+}
--- a/backend/libs/handlers/pages.go
+++ b/backend/libs/handlers/pages.go
@@ -11,7 +11,7 @@ type homeData struct {
 }

 func (a *App) Home(w http.ResponseWriter, r *http.Request) {
-	a.renderer.Render(w, http.StatusOK, "home.gohtml", web.PageData{
+	a.renderer.Render(w, http.StatusOK, "home.html", web.PageData{
 		Title:       "Upload your files",
 		Description: "Upload and share files through a self-hosted Warpbox instance.",
 		Data: homeData{
--- a/backend/libs/handlers/upload.go
+++ b/backend/libs/handlers/upload.go
@@ -18,11 +18,13 @@ func (a *App) Upload(w http.ResponseWriter, r *http.Request) {

 	files := r.MultipartForm.File["file"]
 	result, err := a.uploadService.CreateBox(files, services.UploadOptions{
-		MaxDays:      parseInt(r.FormValue("max_days")),
-		MaxDownloads: parseInt(r.FormValue("max_downloads")),
+		MaxDays:           parseInt(r.FormValue("max_days")),
+		MaxDownloads:      parseInt(r.FormValue("max_downloads")),
+		Password:          r.FormValue("password"),
+		ObfuscateMetadata: r.FormValue("obfuscate_metadata") == "on",
 	})
 	if err != nil {
-		a.logger.Warn("upload failed", "source", "user-upload", "code", 4001, "error", err.Error())
+		a.logger.Warn("upload failed", "source", "user-upload", "severity", "warn", "code", 4001, "error", err.Error())
 		helpers.WriteJSONError(w, http.StatusBadRequest, err.Error())
 		return
 	}
--- a/backend/libs/httpserver/server.go
+++ b/backend/libs/httpserver/server.go
@@ -3,6 +3,7 @@ package httpserver
 import (
 	"log/slog"
 	"net/http"
+	"time"

 	"warpbox.dev/backend/libs/config"
 	"warpbox.dev/backend/libs/handlers"
@@ -21,6 +22,8 @@ func New(cfg config.Config, logger *slog.Logger) (*http.Server, error) {
 	if err != nil {
 		return nil, err
 	}
+	stopCleanup := startCleanup(uploadService, cfg.CleanupEvery, logger)
+	stopThumbnails := startThumbnails(uploadService, cfg.ThumbnailEvery, logger)
 	app := handlers.NewApp(cfg, logger, renderer, uploadService)

 	router := http.NewServeMux()
@@ -43,10 +46,81 @@ func New(cfg config.Config, logger *slog.Logger) (*http.Server, error) {
 		IdleTimeout:  cfg.IdleTimeout,
 	}
 	server.RegisterOnShutdown(func() {
+		stopCleanup()
+		stopThumbnails()
 		if err := uploadService.Close(); err != nil {
-			logger.Error("failed to close upload service", "source", "shutdown", "error", err.Error())
+			logger.Error("failed to close upload service", "source", "shutdown", "severity", "error", "error", err.Error())
 		}
 	})

 	return server, nil
 }
+
+func startCleanup(uploadService *services.UploadService, interval time.Duration, logger *slog.Logger) func() {
+	if interval <= 0 {
+		return func() {}
+	}
+
+	stop := make(chan struct{})
+	go func() {
+		if cleaned, err := uploadService.CleanupExpired(); err != nil {
+			logger.Warn("initial cleanup failed", "source", "housekeeping", "severity", "warn", "code", 4201, "error", err.Error())
+		} else if cleaned > 0 {
+			logger.Info("initial cleanup complete", "source", "housekeeping", "severity", "user_activity", "code", 2202, "cleaned", cleaned)
+		}
+
+		ticker := time.NewTicker(interval)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ticker.C:
+				if _, err := uploadService.CleanupExpired(); err != nil {
+					logger.Warn("scheduled cleanup failed", "source", "housekeeping", "severity", "warn", "code", 4202, "error", err.Error())
+				}
+			case <-stop:
+				return
+			}
+		}
+	}()
+
+	return func() {
+		close(stop)
+	}
+}
+
+func startThumbnails(uploadService *services.UploadService, interval time.Duration, logger *slog.Logger) func() {
+	if interval <= 0 {
+		return func() {}
+	}
+
+	stop := make(chan struct{})
+	run := func(source string) {
+		result, err := uploadService.GenerateMissingThumbnails()
+		if err != nil {
+			logger.Warn("thumbnail job failed", "source", "thumbnail", "severity", "warn", "code", 4203, "error", err.Error())
+			return
+		}
+		if result.Generated > 0 || result.Failed > 0 {
+			logger.Info("thumbnail job run", "source", source, "severity", "user_activity", "code", 2204, "generated", result.Generated, "failed", result.Failed)
+		}
+	}
+
+	go func() {
+		run("thumbnail")
+
+		ticker := time.NewTicker(interval)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ticker.C:
+				run("thumbnail")
+			case <-stop:
+				return
+			}
+		}
+	}()
+
+	return func() {
+		close(stop)
+	}
+}
--- a/backend/libs/logging/logger.go
+++ b/backend/libs/logging/logger.go
@@ -94,12 +94,12 @@ func applyAttr(entry map[string]any, attr slog.Attr) {
 func severity(level slog.Level) string {
 	switch {
 	case level >= slog.LevelError:
-		return "high"
+		return "error"
 	case level >= slog.LevelWarn:
-		return "medium"
+		return "warn"
 	case level <= slog.LevelDebug:
-		return "low"
+		return "dev"
 	default:
-		return "info"
+		return "dev"
 	}
 }
--- a/backend/libs/middleware/logger.go
+++ b/backend/libs/middleware/logger.go
@@ -41,6 +41,7 @@ func Logger(logger *slog.Logger) Middleware {

 			logger.Info("http request",
 				"source", "http",
+				"severity", "dev",
 				"code", status,
 				"method", r.Method,
 				"path", r.URL.Path,
--- a/backend/libs/middleware/recoverer.go
+++ b/backend/libs/middleware/recoverer.go
@@ -12,6 +12,9 @@ func Recoverer(logger *slog.Logger) Middleware {
 			defer func() {
 				if recovered := recover(); recovered != nil {
 					logger.Error("panic recovered",
+						"source", "panic",
+						"severity", "error",
+						"code", 5001,
 						"error", recovered,
 						"stack", string(debug.Stack()),
 						"request_id", RequestIDFromContext(r.Context()),
--- a/backend/libs/services/upload.go
+++ b/backend/libs/services/upload.go
@@ -3,18 +3,28 @@ package services
 import (
 	"archive/zip"
 	"crypto/rand"
+	"crypto/sha256"
+	"crypto/subtle"
 	"encoding/base64"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
+	"image"
+	_ "image/gif"
+	"image/jpeg"
+	_ "image/jpeg"
+	_ "image/png"
 	"io"
 	"log/slog"
 	"mime/multipart"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"strings"
 	"time"

 	"go.etcd.io/bbolt"
+	_ "golang.org/x/image/webp"

 	"warpbox.dev/backend/libs/helpers"
 )
@@ -31,8 +41,10 @@ type UploadService struct {
 }

 type UploadOptions struct {
-	MaxDays      int
-	MaxDownloads int
+	MaxDays           int
+	MaxDownloads      int
+	Password          string
+	ObfuscateMetadata bool
 }

 type Box struct {
@@ -41,6 +53,9 @@ type Box struct {
 	ExpiresAt     time.Time `json:"expiresAt"`
 	MaxDownloads  int       `json:"maxDownloads"`
 	DownloadCount int       `json:"downloadCount"`
+	PasswordSalt  string    `json:"passwordSalt,omitempty"`
+	PasswordHash  string    `json:"passwordHash,omitempty"`
+	Obfuscate     bool      `json:"obfuscate"`
 	Files         []File    `json:"files"`
 }

@@ -50,6 +65,8 @@ type File struct {
 	StoredName  string    `json:"storedName"`
 	Size        int64     `json:"size"`
 	ContentType string    `json:"contentType"`
+	PreviewKind string    `json:"previewKind"`
+	Thumbnail   string    `json:"thumbnail,omitempty"`
 	UploadedAt  time.Time `json:"uploadedAt"`
 }

@@ -68,6 +85,36 @@ type ResultFile struct {
 	URL  string `json:"url"`
 }

+type AdminStats struct {
+	TotalBoxes     int
+	TotalFiles     int
+	TotalSize      int64
+	UploadsLast24H int
+	ExpiredBoxes   int
+	ProtectedBoxes int
+	TotalDownloads int
+	TotalSizeLabel string
+}
+
+type ThumbnailJobResult struct {
+	Scanned   int
+	Generated int
+	Failed    int
+}
+
+type AdminBox struct {
+	ID             string
+	CreatedAt      time.Time
+	ExpiresAt      time.Time
+	FileCount      int
+	TotalSize      int64
+	TotalSizeLabel string
+	DownloadCount  int
+	MaxDownloads   int
+	Protected      bool
+	Expired        bool
+}
+
 func NewUploadService(maxUploadSize int64, dataDir, baseURL string, logger *slog.Logger) (*UploadService, error) {
 	filesDir := filepath.Join(dataDir, "files")
 	dbDir := filepath.Join(dataDir, "db")
@@ -133,8 +180,14 @@ func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOpti
 		CreatedAt:    time.Now().UTC(),
 		ExpiresAt:    time.Now().UTC().Add(time.Duration(opts.MaxDays) * 24 * time.Hour),
 		MaxDownloads: opts.MaxDownloads,
+		Obfuscate:    opts.ObfuscateMetadata && strings.TrimSpace(opts.Password) != "",
 		Files:        make([]File, 0, len(files)),
 	}
+	if strings.TrimSpace(opts.Password) != "" {
+		salt, hash := hashPassword(opts.Password)
+		box.PasswordSalt = salt
+		box.PasswordHash = hash
+	}

 	boxDir := filepath.Join(s.filesDir, box.ID)
 	if err := os.MkdirAll(boxDir, 0o755); err != nil {
@@ -152,7 +205,7 @@ func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOpti
 		}

 		fileID := randomID(8)
-		storedName := fileID + strings.ToLower(filepath.Ext(header.Filename))
+		storedName := "@each@" + fileID + strings.ToLower(filepath.Ext(header.Filename))
 		storedPath := filepath.Join(boxDir, storedName)
 		contentType := header.Header.Get("Content-Type")
 		if contentType == "" {
@@ -171,6 +224,7 @@ func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOpti
 			StoredName:  storedName,
 			Size:        header.Size,
 			ContentType: contentType,
+			PreviewKind: previewKind(contentType),
 			UploadedAt:  time.Now().UTC(),
 		})
 	}
@@ -181,6 +235,7 @@ func (s *UploadService) CreateBox(files []*multipart.FileHeader, opts UploadOpti

 	s.logger.Info("upload complete",
 		"source", "user-upload",
+		"severity", "user_activity",
 		"code", 2001,
 		"box_id", box.ID,
 		"file_count", len(box.Files),
@@ -204,6 +259,173 @@ func (s *UploadService) GetBox(id string) (Box, error) {
 	return box, nil
 }

+func (s *UploadService) ListBoxes(limit int) ([]Box, error) {
+	boxes := make([]Box, 0)
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		cursor := tx.Bucket(boxesBucket).Cursor()
+		for key, value := cursor.Last(); key != nil; key, value = cursor.Prev() {
+			var box Box
+			if err := json.Unmarshal(value, &box); err != nil {
+				return err
+			}
+			boxes = append(boxes, box)
+			if limit > 0 && len(boxes) >= limit {
+				break
+			}
+		}
+		return nil
+	})
+	return boxes, err
+}
+
+func (s *UploadService) AdminStats() (AdminStats, error) {
+	boxes, err := s.ListBoxes(0)
+	if err != nil {
+		return AdminStats{}, err
+	}
+
+	var stats AdminStats
+	cutoff := time.Now().UTC().Add(-24 * time.Hour)
+	now := time.Now().UTC()
+	for _, box := range boxes {
+		stats.TotalBoxes++
+		stats.TotalDownloads += box.DownloadCount
+		if box.CreatedAt.After(cutoff) {
+			stats.UploadsLast24H++
+		}
+		if box.ExpiresAt.Before(now) {
+			stats.ExpiredBoxes++
+		}
+		if s.IsProtected(box) {
+			stats.ProtectedBoxes++
+		}
+		for _, file := range box.Files {
+			stats.TotalFiles++
+			stats.TotalSize += file.Size
+		}
+	}
+	stats.TotalSizeLabel = helpers.FormatBytes(stats.TotalSize)
+	return stats, nil
+}
+
+func (s *UploadService) AdminBoxes(limit int) ([]AdminBox, error) {
+	boxes, err := s.ListBoxes(limit)
+	if err != nil {
+		return nil, err
+	}
+
+	now := time.Now().UTC()
+	rows := make([]AdminBox, 0, len(boxes))
+	for _, box := range boxes {
+		var size int64
+		for _, file := range box.Files {
+			size += file.Size
+		}
+		rows = append(rows, AdminBox{
+			ID:             box.ID,
+			CreatedAt:      box.CreatedAt,
+			ExpiresAt:      box.ExpiresAt,
+			FileCount:      len(box.Files),
+			TotalSize:      size,
+			TotalSizeLabel: helpers.FormatBytes(size),
+			DownloadCount:  box.DownloadCount,
+			MaxDownloads:   box.MaxDownloads,
+			Protected:      s.IsProtected(box),
+			Expired:        box.ExpiresAt.Before(now),
+		})
+	}
+	return rows, nil
+}
+
+func (s *UploadService) DeleteBox(boxID string) error {
+	if err := s.db.Update(func(tx *bbolt.Tx) error {
+		return tx.Bucket(boxesBucket).Delete([]byte(boxID))
+	}); err != nil {
+		return err
+	}
+	if err := os.RemoveAll(filepath.Join(s.filesDir, boxID)); err != nil {
+		return err
+	}
+	s.logger.Info("box deleted", "source", "admin", "severity", "user_activity", "code", 2101, "box_id", boxID)
+	return nil
+}
+
+func (s *UploadService) CleanupExpired() (int, error) {
+	boxes, err := s.ListBoxes(0)
+	if err != nil {
+		return 0, err
+	}
+
+	now := time.Now().UTC()
+	cleaned := 0
+	for _, box := range boxes {
+		if box.ExpiresAt.After(now) {
+			continue
+		}
+		if err := s.DeleteBox(box.ID); err != nil {
+			return cleaned, err
+		}
+		cleaned++
+	}
+	if cleaned > 0 {
+		s.logger.Info("expired boxes cleaned", "source", "housekeeping", "severity", "user_activity", "code", 2201, "cleaned", cleaned)
+	}
+	return cleaned, nil
+}
+
+func (s *UploadService) GenerateMissingThumbnails() (ThumbnailJobResult, error) {
+	boxes, err := s.ListBoxes(0)
+	if err != nil {
+		return ThumbnailJobResult{}, err
+	}
+
+	var result ThumbnailJobResult
+	for _, box := range boxes {
+		if time.Now().UTC().After(box.ExpiresAt) {
+			continue
+		}
+
+		changed := false
+		for i := range box.Files {
+			file := &box.Files[i]
+			if file.Thumbnail != "" || !needsThumbnail(*file) {
+				continue
+			}
+			result.Scanned++
+
+			path := s.FilePath(box, *file)
+			thumbnail := s.generateThumbnail(box.ID, file.ID, path, file.ContentType)
+			if thumbnail == "" {
+				result.Failed++
+				continue
+			}
+
+			file.Thumbnail = thumbnail
+			changed = true
+			result.Generated++
+		}
+
+		if changed {
+			if err := s.saveBox(box); err != nil {
+				return result, err
+			}
+		}
+	}
+
+	if result.Generated > 0 || result.Failed > 0 {
+		s.logger.Info("thumbnail job complete",
+			"source", "thumbnail",
+			"severity", "user_activity",
+			"code", 2203,
+			"scanned", result.Scanned,
+			"generated", result.Generated,
+			"failed", result.Failed,
+		)
+	}
+
+	return result, nil
+}
+
 func (s *UploadService) FindFile(box Box, fileID string) (File, error) {
 	for _, file := range box.Files {
 		if file.ID == fileID {
@@ -217,6 +439,34 @@ func (s *UploadService) FilePath(box Box, file File) string {
 	return filepath.Join(s.filesDir, box.ID, file.StoredName)
 }

+func (s *UploadService) ThumbnailPath(box Box, file File) string {
+	if file.Thumbnail == "" {
+		return ""
+	}
+	return filepath.Join(s.filesDir, box.ID, file.Thumbnail)
+}
+
+func (s *UploadService) BoxMetadataPath(box Box) string {
+	return filepath.Join(s.filesDir, box.ID, ".warpbox.box.json")
+}
+
+func (s *UploadService) IsProtected(box Box) bool {
+	return box.PasswordHash != "" && box.PasswordSalt != ""
+}
+
+func (s *UploadService) VerifyPassword(box Box, password string) bool {
+	if !s.IsProtected(box) {
+		return true
+	}
+	hash := passwordHash(box.PasswordSalt, password)
+	return subtle.ConstantTimeCompare([]byte(hash), []byte(box.PasswordHash)) == 1
+}
+
+func (s *UploadService) UnlockToken(box Box) string {
+	sum := sha256.Sum256([]byte(box.ID + ":" + box.PasswordHash))
+	return hex.EncodeToString(sum[:])
+}
+
 func (s *UploadService) CanDownload(box Box) error {
 	if time.Now().UTC().After(box.ExpiresAt) {
 		return fmt.Errorf("box has expired")
@@ -245,7 +495,10 @@ func (s *UploadService) RecordDownload(boxID string) error {
 		if err != nil {
 			return err
 		}
-		return bucket.Put([]byte(boxID), next)
+		if err := bucket.Put([]byte(boxID), next); err != nil {
+			return err
+		}
+		return s.writeBoxMetadata(box)
 	})
 }

@@ -288,7 +541,10 @@ func (s *UploadService) saveBox(box Box) error {
 	}

 	return s.db.Update(func(tx *bbolt.Tx) error {
-		return tx.Bucket(boxesBucket).Put([]byte(box.ID), data)
+		if err := tx.Bucket(boxesBucket).Put([]byte(box.ID), data); err != nil {
+			return err
+		}
+		return s.writeBoxMetadata(box)
 	})
 }

@@ -338,3 +594,112 @@ func randomID(byteCount int) string {
 	}
 	return base64.RawURLEncoding.EncodeToString(data)
 }
+
+func hashPassword(password string) (string, string) {
+	salt := randomID(18)
+	return salt, passwordHash(salt, password)
+}
+
+func passwordHash(salt, password string) string {
+	sum := sha256.Sum256([]byte(salt + ":" + password))
+	return hex.EncodeToString(sum[:])
+}
+
+func previewKind(contentType string) string {
+	switch {
+	case strings.HasPrefix(contentType, "image/"):
+		return "image"
+	case strings.HasPrefix(contentType, "video/"):
+		return "video"
+	case strings.HasPrefix(contentType, "audio/"):
+		return "audio"
+	default:
+		return "file"
+	}
+}
+
+func needsThumbnail(file File) bool {
+	return file.PreviewKind == "image" || file.PreviewKind == "video"
+}
+
+func (s *UploadService) generateThumbnail(boxID, fileID, path, contentType string) string {
+	thumbnailName := "@thumb@" + fileID + ".jpg"
+	thumbnailPath := filepath.Join(s.filesDir, boxID, thumbnailName)
+
+	var err error
+	switch {
+	case strings.HasPrefix(contentType, "image/"):
+		err = createImageThumbnail(path, thumbnailPath)
+	case strings.HasPrefix(contentType, "video/"):
+		err = createVideoThumbnail(path, thumbnailPath)
+	default:
+		return ""
+	}
+	if err != nil {
+		s.logger.Warn("thumbnail generation failed", "source", "thumbnail", "severity", "warn", "code", 4101, "file_id", fileID, "error", err.Error())
+		return ""
+	}
+	return thumbnailName
+}
+
+func createImageThumbnail(sourcePath, targetPath string) error {
+	source, err := os.Open(sourcePath)
+	if err != nil {
+		return err
+	}
+	defer source.Close()
+
+	img, _, err := image.Decode(source)
+	if err != nil {
+		return err
+	}
+
+	thumb := resizeNearest(img, 360, 240)
+	target, err := os.OpenFile(targetPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o644)
+	if err != nil {
+		return err
+	}
+	defer target.Close()
+
+	return jpeg.Encode(target, thumb, &jpeg.Options{Quality: 82})
+}
+
+func createVideoThumbnail(sourcePath, targetPath string) error {
+	return exec.Command("ffmpeg", "-y", "-loglevel", "error", "-ss", "00:00:01", "-i", sourcePath, "-frames:v", "1", "-vf", "scale=360:-1", targetPath).Run()
+}
+
+func resizeNearest(src image.Image, maxWidth, maxHeight int) *image.RGBA {
+	bounds := src.Bounds()
+	width := bounds.Dx()
+	height := bounds.Dy()
+	if width <= 0 || height <= 0 {
+		return image.NewRGBA(image.Rect(0, 0, 1, 1))
+	}
+
+	scale := min(float64(maxWidth)/float64(width), float64(maxHeight)/float64(height))
+	if scale > 1 {
+		scale = 1
+	}
+	targetWidth := max(1, int(float64(width)*scale))
+	targetHeight := max(1, int(float64(height)*scale))
+	dst := image.NewRGBA(image.Rect(0, 0, targetWidth, targetHeight))
+
+	for y := 0; y < targetHeight; y++ {
+		for x := 0; x < targetWidth; x++ {
+			srcX := bounds.Min.X + int(float64(x)/scale)
+			srcY := bounds.Min.Y + int(float64(y)/scale)
+			dst.Set(x, y, src.At(srcX, srcY))
+		}
+	}
+
+	return dst
+}
+
+func (s *UploadService) writeBoxMetadata(box Box) error {
+	path := s.BoxMetadataPath(box)
+	data, err := json.MarshalIndent(box, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, data, 0o600)
+}
--- a/backend/libs/web/renderer.go
+++ b/backend/libs/web/renderer.go
@@ -18,22 +18,23 @@ type PageData struct {
 	BaseURL     string
 	Title       string
 	Description string
+	ImageURL    string
 	CurrentYear int
 	Data        any
 }

 func NewRenderer(templateDir, appName, baseURL string) (*Renderer, error) {
-	layouts, err := filepath.Glob(filepath.Join(templateDir, "layouts", "*.gohtml"))
+	layouts, err := filepath.Glob(filepath.Join(templateDir, "layouts", "*.html"))
 	if err != nil {
 		return nil, err
 	}

-	partials, err := filepath.Glob(filepath.Join(templateDir, "partials", "*.gohtml"))
+	partials, err := filepath.Glob(filepath.Join(templateDir, "partials", "*.html"))
 	if err != nil {
 		return nil, err
 	}

-	pages, err := filepath.Glob(filepath.Join(templateDir, "pages", "*.gohtml"))
+	pages, err := filepath.Glob(filepath.Join(templateDir, "pages", "*.html"))
 	if err != nil {
 		return nil, err
 	}
--- a/backend/static/css/app.css
+++ b/backend/static/css/app.css
@@ -240,11 +240,27 @@ h1 {

 .option-grid {
  display: grid;
-  grid-template-columns: repeat(3, minmax(0, 1fr));
+  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1rem;
 }

+.checkbox-field {
+  display: flex;
+  align-items: center;
+  gap: 0.55rem;
+}
+
+.checkbox-field input {
+  width: 1rem;
+  min-height: 1rem;
+}
+
+.checkbox-field span {
+  margin: 0;
+  color: var(--muted-foreground);
+}
+
 label span {
  display: block;
  margin-bottom: 0.4rem;
@@ -334,6 +350,16 @@ button {
  background: var(--accent);
 }

+.button-danger {
+  border-color: rgba(248, 113, 113, 0.28);
+  background: rgba(127, 29, 29, 0.3);
+  color: #fecaca;
+}
+
+.button-danger:hover {
+  background: rgba(127, 29, 29, 0.55);
+}
+
 .button-wide {
  width: 100%;
  min-height: 2.75rem;
@@ -365,7 +391,8 @@ button {
  height: 100%;
  background: var(--primary);
  transform-origin: left center;
-  animation: progress-pulse 1.1s ease-in-out infinite;
+  transform: scaleX(0);
+  transition: transform 180ms ease;
 }

 .upload-result {
@@ -396,6 +423,10 @@ button {
  margin-top: 1rem;
 }

+.upload-queue {
+  margin-top: 1rem;
+}
+
 .result-item,
 .download-item {
  display: flex;
@@ -422,6 +453,23 @@ code {
  white-space: nowrap;
 }

+.file-progress-side {
+  width: min(10rem, 32vw);
+  display: grid;
+  gap: 0.35rem;
+}
+
+.file-progress-percent {
+  color: var(--muted-foreground);
+  font-size: 0.75rem;
+  text-align: right;
+}
+
+.file-progress {
+  height: 0.35rem;
+  margin-top: 0;
+}
+
 .result-item small,
 .download-item small,
 code {
@@ -443,6 +491,10 @@ code {
  place-items: center;
 }

+.download-view-wide {
+  width: min(58rem, calc(100% - 2rem));
+}
+
 .download-card {
  text-align: center;
 }
@@ -489,6 +541,103 @@ code {
  text-decoration: none;
 }

+.view-toolbar {
+  display: flex;
+  justify-content: center;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  margin-top: 1rem;
+}
+
+.button.is-active {
+  background: var(--primary);
+  color: var(--primary-foreground);
+}
+
+.file-browser {
+  transition: opacity 160ms ease;
+}
+
+.file-card {
+  position: relative;
+}
+
+.thumb-link {
+  display: block;
+  overflow: hidden;
+  flex: 0 0 4.75rem;
+  width: 4.75rem;
+  aspect-ratio: 16 / 10;
+  border: 1px solid var(--border);
+  border-radius: calc(var(--radius) - 0.125rem);
+  background: var(--muted);
+}
+
+.thumb-link img {
+  width: 100%;
+  height: 100%;
+  display: block;
+  object-fit: cover;
+}
+
+.file-main {
+  min-width: 0;
+  flex: 1;
+  color: var(--foreground);
+  text-decoration: none;
+}
+
+.file-browser.is-thumbs {
+  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
+}
+
+.file-browser.is-thumbs .file-card {
+  display: grid;
+  align-content: start;
+  gap: 0.7rem;
+}
+
+.file-browser.is-thumbs .thumb-link {
+  width: 100%;
+  flex-basis: auto;
+}
+
+.file-browser.is-thumbs .button {
+  width: 100%;
+}
+
+.file-browser.images-only .file-card:not([data-kind="image"]) {
+  display: none;
+}
+
+.unlock-form {
+  margin: 1rem auto 0;
+  display: grid;
+  max-width: 22rem;
+  gap: 0.75rem;
+}
+
+.preview-stage {
+  overflow: hidden;
+  margin-bottom: 1rem;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--background);
+}
+
+.preview-stage img,
+.preview-stage video {
+  width: 100%;
+  max-height: 55vh;
+  display: block;
+  object-fit: contain;
+}
+
+.preview-stage audio {
+  width: calc(100% - 2rem);
+  margin: 1rem;
+}
+
 .site-footer {
  width: min(72rem, calc(100% - 2rem));
  margin: 0 auto;
@@ -504,16 +653,107 @@ code {
  text-decoration: none;
 }

-@keyframes progress-pulse {
-  0% {
-    transform: scaleX(0.12);
-  }
-  50% {
-    transform: scaleX(0.72);
-  }
-  100% {
-    transform: scaleX(1);
-  }
+.form-error {
+  margin: 1rem 0 0;
+  color: #fecaca;
+  font-size: 0.9rem;
+}
+
+.admin-view {
+  width: min(72rem, calc(100% - 2rem));
+  margin: 0 auto;
+  padding: 2rem 0 3rem;
+}
+
+.admin-header,
+.table-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.kicker {
+  margin: 0 0 0.4rem;
+  color: var(--muted-foreground);
+  font-size: 0.78rem;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.metric-grid {
+  display: grid;
+  grid-template-columns: repeat(6, minmax(0, 1fr));
+  gap: 0.8rem;
+  margin-top: 1.5rem;
+}
+
+.metric-card {
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: rgba(24, 24, 27, 0.78);
+  padding: 1rem;
+}
+
+.metric-card span,
+.table-header p {
+  display: block;
+  color: var(--muted-foreground);
+  font-size: 0.78rem;
+}
+
+.metric-card strong {
+  display: block;
+  margin-top: 0.4rem;
+  color: var(--foreground);
+  font-size: 1.35rem;
+}
+
+.admin-table-card {
+  margin-top: 1rem;
+}
+
+.table-header h2 {
+  margin: 0;
+  font-size: 1.05rem;
+}
+
+.table-header p {
+  margin: 0.3rem 0 0;
+}
+
+.admin-table-wrap {
+  overflow-x: auto;
+  margin-top: 1rem;
+}
+
+.admin-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.85rem;
+}
+
+.admin-table th,
+.admin-table td {
+  border-bottom: 1px solid var(--border);
+  padding: 0.75rem;
+  text-align: left;
+  vertical-align: middle;
+}
+
+.admin-table th {
+  color: var(--muted-foreground);
+  font-weight: 650;
+}
+
+.table-actions {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+.table-actions form {
+  margin: 0;
 }

@media (max-width: 720px) {
@@ -536,10 +776,18 @@ code {
    align-items: stretch;
  }

+  .option-grid {
+    grid-template-columns: 1fr;
+  }
+
  .result-actions {
    width: 100%;
  }

+  .file-progress-side {
+    width: 100%;
+  }
+
  .result-actions .button {
    flex: 1;
  }
@@ -551,4 +799,14 @@ code {
  .drop-zone {
    min-height: 15rem;
  }
+
+  .admin-header,
+  .table-header {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .metric-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
 }
--- a/backend/static/img/file-placeholder.webp
+++ b/backend/static/img/file-placeholder.webp
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -8,14 +8,38 @@
  const result = document.querySelector("#upload-result");
  const resultMeta = document.querySelector("#result-meta");
  const resultList = document.querySelector("#result-list");
-  const copyAll = document.querySelector("#copy-all");
+  const uploadQueue = document.querySelector("#upload-queue");
+  const totalProgressBar = document.querySelector("#total-progress-bar");
+  const copyURL = document.querySelector("#copy-url");
  const openBox = document.querySelector("#open-box");
+  const fileBrowser = document.querySelector("[data-file-browser]");
+  const viewButtons = document.querySelectorAll("[data-view-button]");
+  const previewImages = document.querySelector("[data-preview-images]");
+
+  if (fileBrowser) {
+    viewButtons.forEach((button) => {
+      button.addEventListener("click", () => {
+        const view = button.getAttribute("data-view-button");
+        fileBrowser.classList.toggle("is-list", view === "list");
+        fileBrowser.classList.toggle("is-thumbs", view === "thumbs");
+        viewButtons.forEach((item) => item.classList.toggle("is-active", item === button));
+      });
+    });
+
+    if (previewImages) {
+      previewImages.addEventListener("click", () => {
+        fileBrowser.classList.toggle("images-only");
+        previewImages.classList.toggle("is-active");
+      });
+    }
+  }

  if (!form || !dropZone || !fileInput) {
    return;
  }

-  let latestLinks = [];
+  let latestBoxURL = "";
+  let selectedFiles = [];

  ["dragenter", "dragover"].forEach((eventName) => {
    dropZone.addEventListener(eventName, (event) => {
@@ -51,22 +75,12 @@

    const submit = form.querySelector("button[type='submit']");
    const formData = new FormData(form);
+    selectedFiles = Array.from(fileInput.files);
+    renderQueue(selectedFiles, "queued");
    setLoading(true, submit);

    try {
-      const response = await fetch(form.action, {
-        method: "POST",
-        body: formData,
-        headers: {
-          Accept: "application/json",
-        },
-      });
-
-      const payload = await response.json();
-      if (!response.ok) {
-        throw new Error(payload.error || "Upload failed");
-      }
-
+      const payload = await uploadWithProgress(form.action, formData, selectedFiles);
      renderResult(payload);
      form.reset();
      updateSelectedState([]);
@@ -77,14 +91,15 @@
    }
  });

-  if (copyAll) {
-    copyAll.addEventListener("click", () => {
-      copyText(latestLinks.join("\n"), copyAll, "Copied");
+  if (copyURL) {
+    copyURL.addEventListener("click", () => {
+      copyText(latestBoxURL, copyURL, "Copied");
    });
  }

  function updateSelectedState(files) {
-    const count = files.length || 0;
+    selectedFiles = Array.from(files || []);
+    const count = selectedFiles.length || 0;
    const title = dropZone.querySelector(".drop-title");
    if (title) {
      title.textContent = count === 0 ? "Drop files to upload" : count === 1 ? "1 file selected" : `${count} files selected`;
@@ -92,6 +107,12 @@
    if (fileSummary) {
      fileSummary.textContent = count === 0 ? "Choose one or more files to begin." : `${count} file${count === 1 ? "" : "s"} ready.`;
    }
+    if (count > 0) {
+      renderQueue(selectedFiles, "queued");
+    } else if (uploadQueue) {
+      uploadQueue.hidden = true;
+      uploadQueue.replaceChildren();
+    }
  }

  function setLoading(isLoading, submit) {
@@ -103,6 +124,7 @@
      submit.textContent = isLoading ? "Uploading..." : "Upload files";
    }
    updateStatus(isLoading ? "Transferring files..." : "");
+    setTotalProgress(isLoading ? 0 : 100);
  }

  function updateStatus(message) {
@@ -116,48 +138,129 @@
      return;
    }

-    latestLinks = [payload.boxUrl, payload.zipUrl].concat(payload.files.map((file) => file.url));
+    latestBoxURL = payload.boxUrl;
    result.hidden = false;
    openBox.href = payload.boxUrl;
    resultMeta.textContent = `${payload.files.length} file${payload.files.length === 1 ? "" : "s"} · expires ${formatDate(payload.expiresAt)}`;

    resultList.replaceChildren();
    payload.files.forEach((file) => {
-      const row = document.createElement("div");
-      row.className = "result-item";
-
-      const body = document.createElement("span");
-      const name = document.createElement("strong");
-      name.textContent = file.name;
-      const url = document.createElement("code");
-      url.textContent = file.url;
-      body.append(name, url);
-
-      const copy = document.createElement("button");
-      copy.className = "button button-outline";
-      copy.type = "button";
-      copy.textContent = "Copy";
-      copy.addEventListener("click", () => copyText(file.url, copy, "Copied"));
-
-      row.append(body, copy);
-      resultList.append(row);
+      resultList.append(createFileRow({
+        name: file.name,
+        meta: `${file.size} · ${file.url}`,
+        progress: 100,
+        status: "complete",
+      }));
    });
+  }

-    const zip = document.createElement("div");
-    zip.className = "result-item";
-    const zipBody = document.createElement("span");
-    const zipName = document.createElement("strong");
-    zipName.textContent = "Download all as zip";
-    const zipUrl = document.createElement("code");
-    zipUrl.textContent = payload.zipUrl;
-    zipBody.append(zipName, zipUrl);
-    const zipCopy = document.createElement("button");
-    zipCopy.className = "button button-outline";
-    zipCopy.type = "button";
-    zipCopy.textContent = "Copy";
-    zipCopy.addEventListener("click", () => copyText(payload.zipUrl, zipCopy, "Copied"));
-    zip.append(zipBody, zipCopy);
-    resultList.append(zip);
+  function uploadWithProgress(url, formData, files) {
+    return new Promise((resolve, reject) => {
+      const request = new XMLHttpRequest();
+      request.open("POST", url);
+      request.setRequestHeader("Accept", "application/json");
+
+      request.upload.addEventListener("progress", (event) => {
+        if (!event.lengthComputable) {
+          updateStatus("Uploading...");
+          return;
+        }
+        const percent = Math.round((event.loaded / event.total) * 100);
+        updateStatus(`${percent}%`);
+        setTotalProgress(percent);
+        setFileProgress(files, percent);
+      });
+
+      request.addEventListener("load", () => {
+        let payload = {};
+        try {
+          payload = JSON.parse(request.responseText || "{}");
+        } catch (error) {
+          reject(new Error("Upload response could not be read"));
+          return;
+        }
+        if (request.status < 200 || request.status >= 300) {
+          reject(new Error(payload.error || "Upload failed"));
+          return;
+        }
+        setTotalProgress(100);
+        setFileProgress(files, 100);
+        resolve(payload);
+      });
+
+      request.addEventListener("error", () => reject(new Error("Network error during upload")));
+      request.addEventListener("abort", () => reject(new Error("Upload aborted")));
+      request.send(formData);
+    });
+  }
+
+  function renderQueue(files, status) {
+    if (!uploadQueue) {
+      return;
+    }
+    uploadQueue.hidden = files.length === 0;
+    uploadQueue.replaceChildren();
+    files.forEach((file) => {
+      uploadQueue.append(createFileRow({
+        name: file.name,
+        meta: formatBytes(file.size),
+        progress: status === "queued" ? 0 : 100,
+        status,
+      }));
+    });
+  }
+
+  function createFileRow(file) {
+    const row = document.createElement("div");
+    row.className = "result-item upload-file-row";
+    row.dataset.fileName = file.name;
+
+    const body = document.createElement("span");
+    const name = document.createElement("strong");
+    name.textContent = file.name;
+    const meta = document.createElement("code");
+    meta.textContent = file.meta;
+    body.append(name, meta);
+
+    const side = document.createElement("div");
+    side.className = "file-progress-side";
+    const percent = document.createElement("span");
+    percent.className = "file-progress-percent";
+    percent.textContent = `${file.progress}%`;
+    const bar = document.createElement("div");
+    bar.className = "progress file-progress";
+    const fill = document.createElement("span");
+    fill.style.transform = `scaleX(${file.progress / 100})`;
+    bar.append(fill);
+    side.append(percent, bar);
+
+    row.append(body, side);
+    return row;
+  }
+
+  function setTotalProgress(percent) {
+    if (totalProgressBar) {
+      totalProgressBar.style.transform = `scaleX(${Math.max(0, Math.min(100, percent)) / 100})`;
+    }
+  }
+
+  function setFileProgress(files, totalPercent) {
+    if (!uploadQueue) {
+      return;
+    }
+    const count = files.length || 1;
+    const completedFloat = (Math.max(0, Math.min(100, totalPercent)) / 100) * count;
+    uploadQueue.querySelectorAll(".upload-file-row").forEach((row, index) => {
+      const progress = Math.max(0, Math.min(100, Math.round((completedFloat - index) * 100)));
+      const percent = row.querySelector(".file-progress-percent");
+      const fill = row.querySelector(".file-progress span");
+      if (percent) {
+        percent.textContent = `${progress}%`;
+      }
+      if (fill) {
+        fill.style.transform = `scaleX(${progress / 100})`;
+      }
+    });
  }

  async function copyText(text, button, copiedLabel) {
@@ -183,4 +286,18 @@
      year: "numeric",
    });
  }
+
+  function formatBytes(bytes) {
+    if (bytes < 1024) {
+      return `${bytes} B`;
+    }
+    const units = ["KiB", "MiB", "GiB", "TiB"];
+    let value = bytes / 1024;
+    let unit = 0;
+    while (value >= 1024 && unit < units.length - 1) {
+      value /= 1024;
+      unit += 1;
+    }
+    return `${value.toFixed(1)} ${units[unit]}`;
+  }
 })();
--- a/backend/templates/layouts/base.gohtml
+++ b/backend/templates/layouts/base.gohtml
@@ -12,7 +12,9 @@
  <meta property="og:description" content="{{.Description}}">
  <meta property="og:type" content="website">
  <meta property="og:url" content="{{.BaseURL}}">
+  {{if .ImageURL}}<meta property="og:image" content="{{.ImageURL}}">{{end}}
  <meta name="twitter:card" content="summary_large_image">
+  {{if .ImageURL}}<meta name="twitter:image" content="{{.ImageURL}}">{{end}}
  <link rel="stylesheet" href="/static/css/app.css">
  <script defer src="/static/js/app.js"></script>
 </head>
--- a/backend/templates/pages/admin.html
+++ b/backend/templates/pages/admin.html
@@ -0,0 +1,95 @@
+{{define "admin.html"}}{{template "base" .}}{{end}}
+
+{{define "content"}}
+<section class="admin-view" aria-labelledby="admin-title">
+  <div class="admin-header">
+    <div>
+      <p class="kicker">Operator console</p>
+      <h1 id="admin-title">Admin overview</h1>
+    </div>
+    <form action="/admin/logout" method="post">
+      <button class="button button-outline" type="submit">Logout</button>
+    </form>
+  </div>
+
+  <div class="metric-grid">
+    <article class="metric-card">
+      <span>Total boxes</span>
+      <strong>{{.Data.Stats.TotalBoxes}}</strong>
+    </article>
+    <article class="metric-card">
+      <span>Total files</span>
+      <strong>{{.Data.Stats.TotalFiles}}</strong>
+    </article>
+    <article class="metric-card">
+      <span>Storage used</span>
+      <strong>{{.Data.Stats.TotalSizeLabel}}</strong>
+    </article>
+    <article class="metric-card">
+      <span>Uploads 24h</span>
+      <strong>{{.Data.Stats.UploadsLast24H}}</strong>
+    </article>
+    <article class="metric-card">
+      <span>Protected</span>
+      <strong>{{.Data.Stats.ProtectedBoxes}}</strong>
+    </article>
+    <article class="metric-card">
+      <span>Expired</span>
+      <strong>{{.Data.Stats.ExpiredBoxes}}</strong>
+    </article>
+  </div>
+
+  <div class="card admin-table-card">
+    <div class="card-content">
+      <div class="table-header">
+        <div>
+          <h2>Recent uploads</h2>
+          <p>View or remove anonymous boxes.</p>
+        </div>
+        <a class="button button-outline" href="/admin/files">View all</a>
+      </div>
+
+      <div class="admin-table-wrap">
+        <table class="admin-table">
+          <thead>
+            <tr>
+              <th>Box</th>
+              <th>Files</th>
+              <th>Size</th>
+              <th>Downloads</th>
+              <th>Created</th>
+              <th>Expires</th>
+              <th>Status</th>
+              <th>Actions</th>
+            </tr>
+          </thead>
+          <tbody>
+            {{range .Data.Boxes}}
+              <tr>
+                <td><code>{{.ID}}</code></td>
+                <td>{{.FileCount}}</td>
+                <td>{{.TotalSizeLabel}}</td>
+                <td>{{.DownloadCount}}{{if .MaxDownloads}} / {{.MaxDownloads}}{{end}}</td>
+                <td>{{.CreatedAt}}</td>
+                <td>{{.ExpiresAt}}</td>
+                <td>
+                  {{if .Expired}}<span class="badge">expired</span>{{else}}<span class="badge">active</span>{{end}}
+                  {{if .Protected}}<span class="badge">protected</span>{{end}}
+                </td>
+                <td class="table-actions">
+                  <a class="button button-outline" href="/d/{{.ID}}">View</a>
+                  <form action="/admin/boxes/{{.ID}}/delete" method="post">
+                    <button class="button button-danger" type="submit">Delete</button>
+                  </form>
+                </td>
+              </tr>
+            {{else}}
+              <tr><td colspan="8">No uploads yet.</td></tr>
+            {{end}}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  </div>
+</section>
+{{end}}
--- a/backend/templates/pages/admin_login.html
+++ b/backend/templates/pages/admin_login.html
@@ -0,0 +1,23 @@
+{{define "admin_login.html"}}{{template "base" .}}{{end}}
+
+{{define "content"}}
+<section class="download-view" aria-labelledby="admin-login-title">
+  <form class="card download-card" action="/admin/login" method="post">
+    <div class="card-content">
+      <div class="file-emblem" aria-hidden="true">
+        <svg viewBox="0 0 24 24" role="img" focusable="false"><path d="M12 17a2 2 0 1 0 0-4 2 2 0 0 0 0 4Z" /><path d="M19 11V8A7 7 0 0 0 5 8v3" /><path d="M5 11h14v10H5z" /></svg>
+      </div>
+      <h1 id="admin-login-title">Admin login</h1>
+      <p class="download-subtitle">Use the token from <code>WARPBOX_ADMIN_TOKEN</code>.</p>
+      {{if .Data.Error}}<p class="form-error">{{.Data.Error}}</p>{{end}}
+      <div class="unlock-form">
+        <label>
+          <span>Admin token</span>
+          <input type="password" name="token" autocomplete="current-password" required>
+        </label>
+        <button class="button button-primary" type="submit">Sign in</button>
+      </div>
+    </div>
+  </form>
+</section>
+{{end}}
--- a/backend/templates/pages/download.gohtml
+++ b/backend/templates/pages/download.gohtml
@@ -1,41 +0,0 @@
-{{define "download.gohtml"}}{{template "base" .}}{{end}}
-
-{{define "content"}}
-<section class="download-view" aria-labelledby="download-title">
-  <div class="card download-card">
-    <div class="card-content">
-      <div class="file-emblem" aria-hidden="true">
-        <svg viewBox="0 0 24 24" role="img" focusable="false"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8Z" /><path d="M14 2v6h6" /></svg>
-      </div>
-      <h1 id="download-title">Download files</h1>
-      <p class="download-subtitle">Bucket id: {{.Data.Box.ID}}</p>
-
-      {{if .Data.Files}}
-        <div class="badge-row">
-          <span class="badge">Expires {{.Data.ExpiresLabel}}</span>
-          {{if .Data.MaxDownloads}}<span class="badge">{{.Data.DownloadCount}} / {{.Data.MaxDownloads}} downloads</span>{{end}}
-        </div>
-
-        <a class="button button-primary button-wide" href="{{.Data.ZipURL}}">
-          <svg viewBox="0 0 24 24" role="img" focusable="false" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" /></svg>
-          Download zip
-        </a>
-
-        <div class="download-list">
-          {{range .Data.Files}}
-            <a class="download-item" href="{{.URL}}">
-              <span>
-                <strong>{{.Name}}</strong>
-                <small>{{.Size}} · {{.ContentType}}</small>
-              </span>
-              <svg viewBox="0 0 24 24" role="img" focusable="false" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" /></svg>
-            </a>
-          {{end}}
-        </div>
-      {{else}}
-        <p class="download-subtitle">{{.Data.ExpiresLabel}}</p>
-      {{end}}
-    </div>
-  </div>
-</section>
-{{end}}
--- a/backend/templates/pages/download.html
+++ b/backend/templates/pages/download.html
@@ -0,0 +1,70 @@
+{{define "download.html"}}{{template "base" .}}{{end}}
+
+{{define "content"}}
+<section class="download-view download-view-wide" aria-labelledby="download-title">
+  <div class="card download-card">
+    <div class="card-content">
+      <div class="file-emblem" aria-hidden="true">
+        <svg viewBox="0 0 24 24" role="img" focusable="false"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8Z" /><path d="M14 2v6h6" /></svg>
+      </div>
+      <h1 id="download-title">{{if .Data.Locked}}Protected box{{else}}Download files{{end}}</h1>
+      <p class="download-subtitle">Bucket id: {{.Data.Box.ID}}</p>
+
+      {{if .Data.Locked}}
+        <form class="unlock-form" action="/d/{{.Data.Box.ID}}/unlock" method="post">
+          <label>
+            <span>Password</span>
+            <input type="password" name="password" autocomplete="current-password" required>
+          </label>
+          <button class="button button-primary" type="submit">Unlock box</button>
+        </form>
+        {{if .Data.Obfuscated}}
+          <p class="download-subtitle">File names, counts, and previews are hidden until the password is entered.</p>
+        {{end}}
+      {{end}}
+
+      {{if .Data.Files}}
+        <div class="badge-row">
+          <span class="badge">Expires {{.Data.ExpiresLabel}}</span>
+          {{if .Data.MaxDownloads}}<span class="badge">{{.Data.DownloadCount}} / {{.Data.MaxDownloads}} downloads</span>{{end}}
+        </div>
+
+        {{if not .Data.Locked}}
+          <a class="button button-primary button-wide" href="{{.Data.ZipURL}}">
+            <svg viewBox="0 0 24 24" role="img" focusable="false" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" /></svg>
+            Download zip
+          </a>
+        {{end}}
+
+        <div class="view-toolbar" aria-label="File view options">
+          <button class="button button-outline is-active" type="button" data-view-button="list">List</button>
+          <button class="button button-outline" type="button" data-view-button="thumbs">Thumbnails</button>
+          <button class="button button-outline" type="button" data-preview-images>Preview images only</button>
+        </div>
+
+        <div class="download-list file-browser is-list" data-file-browser>
+          {{range .Data.Files}}
+            <article class="download-item file-card" data-kind="{{.PreviewKind}}">
+              <a class="thumb-link" href="{{.URL}}" aria-label="Preview {{.Name}}">
+                <img src="{{.ThumbnailURL}}" alt="" loading="lazy">
+              </a>
+              <a class="file-main" href="{{.URL}}">
+                <strong>{{.Name}}</strong>
+                <small>{{.Size}} · {{.ContentType}}</small>
+              </a>
+              {{if not $.Data.Locked}}
+                <a class="button button-outline" href="{{.DownloadURL}}">
+                  <svg viewBox="0 0 24 24" role="img" focusable="false" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" /></svg>
+                  Download
+                </a>
+              {{end}}
+            </article>
+          {{end}}
+        </div>
+      {{else if not .Data.Locked}}
+        <p class="download-subtitle">{{.Data.ExpiresLabel}}</p>
+      {{end}}
+    </div>
+  </div>
+</section>
+{{end}}
--- a/backend/templates/pages/home.gohtml
+++ b/backend/templates/pages/home.gohtml
@@ -1,4 +1,4 @@
-{{define "home.gohtml"}}{{template "base" .}}{{end}}
+{{define "home.html"}}{{template "base" .}}{{end}}

 {{define "content"}}
 <section class="upload-view" aria-labelledby="upload-title">
@@ -39,7 +39,11 @@
          </label>
          <label>
            <span>Password</span>
-            <input type="password" name="password" autocomplete="new-password" placeholder="Coming soon" disabled>
+            <input type="password" name="password" autocomplete="new-password" placeholder="Optional">
+          </label>
+          <label class="checkbox-field">
+            <input type="checkbox" name="obfuscate_metadata">
+            <span>Hide file names/count until unlocked</span>
          </label>
        </div>
      </details>
@@ -49,8 +53,9 @@
          <span>Uploading</span>
          <span id="upload-status">Preparing...</span>
        </div>
-        <div class="progress"><span></span></div>
+        <div class="progress"><span id="total-progress-bar"></span></div>
      </div>
+      <div class="result-list upload-queue" id="upload-queue" hidden></div>

      <div class="form-footer">
        <p id="file-summary">Choose one or more files to begin.</p>
@@ -70,7 +75,7 @@
          <p id="result-meta"></p>
        </div>
        <div class="result-actions">
-          <button class="button button-outline" type="button" id="copy-all">Copy all</button>
+          <button class="button button-outline" type="button" id="copy-url">Copy URL</button>
          <a class="button button-primary" id="open-box" href="/">Open box</a>
        </div>
      </div>
--- a/backend/templates/pages/preview.html
+++ b/backend/templates/pages/preview.html
@@ -0,0 +1,36 @@
+{{define "preview.html"}}{{template "base" .}}{{end}}
+
+{{define "content"}}
+<section class="download-view" aria-labelledby="preview-title">
+  <div class="card download-card">
+    <div class="card-content">
+      {{if .Data.Locked}}
+        <div class="file-emblem" aria-hidden="true">
+          <svg viewBox="0 0 24 24" role="img" focusable="false"><path d="M12 17a2 2 0 1 0 0-4 2 2 0 0 0 0 4Z" /><path d="M19 11V8A7 7 0 0 0 5 8v3" /><path d="M5 11h14v10H5z" /></svg>
+        </div>
+        <h1 id="preview-title">Protected file</h1>
+        <p class="download-subtitle">Unlock the box before viewing this file.</p>
+        <a class="button button-primary button-wide" href="/d/{{.Data.Box.ID}}">Unlock box</a>
+      {{else}}
+        <div class="preview-stage">
+          {{if eq .Data.File.PreviewKind "image"}}
+            <img src="{{.Data.DownloadURL}}?inline=1" alt="{{.Data.File.Name}}">
+          {{else if eq .Data.File.PreviewKind "video"}}
+            <video src="{{.Data.DownloadURL}}?inline=1" poster="{{.Data.File.ThumbnailURL}}" controls preload="metadata"></video>
+          {{else if eq .Data.File.PreviewKind "audio"}}
+            <audio src="{{.Data.DownloadURL}}?inline=1" controls preload="metadata"></audio>
+          {{else}}
+            <img src="{{.Data.File.ThumbnailURL}}" alt="">
+          {{end}}
+        </div>
+        <h1 id="preview-title">{{.Data.File.Name}}</h1>
+        <p class="download-subtitle">{{.Data.File.Size}} · {{.Data.File.ContentType}}</p>
+        <a class="button button-primary button-wide" href="{{.Data.DownloadURL}}">
+          <svg viewBox="0 0 24 24" role="img" focusable="false" aria-hidden="true"><path d="M12 3v12m0 0 4-4m-4 4-4-4M5 21h14" /></svg>
+          Download file
+        </a>
+      {{end}}
+    </div>
+  </div>
+</section>
+{{end}}
--- a/scripts/env/dev.env.example
+++ b/scripts/env/dev.env.example
@@ -3,6 +3,9 @@ WARPBOX_ENV=development
 WARPBOX_ADDR=:8080
 WARPBOX_BASE_URL=http://localhost:8080
 WARPBOX_DATA_DIR=./data
+WARPBOX_ADMIN_TOKEN=change-me
+WARPBOX_CLEANUP_EVERY=1h
+WARPBOX_THUMBNAIL_EVERY=1m
 WARPBOX_MAX_UPLOAD_SIZE_MB=2048
 WARPBOX_READ_TIMEOUT=15s
 WARPBOX_WRITE_TIMEOUT=60s