- Add POST /upload to accept multipart file uploads
- Generate random box IDs and persist files under data/uploads/<boxID>
- Sanitize and deduplicate filenames to avoid invalid paths/collisions
- Return box metadata and saved file details in the response
- Add Win98-style upload UI styling to support the new flowfeat(server): add multipart upload endpoint with box IDs
- Add POST /upload to accept multipart file uploads
- Generate random box IDs and persist files under data/uploads/<boxID>
- Sanitize and deduplicate filenames to avoid invalid paths/collisions
- Return box metadata and saved file details in the response
- Add Win98-style upload UI styling to support the new flow
