* fix(upload): remove file type allowlist to support all file types
Removes the hardcoded MIME type allowlist from both frontend and backend
that was blocking uploads of file types like Word documents (.docx).
File size limit (10 MB) is still enforced. Content type detection is
preserved for metadata storage.
Closes MUL-123
* feat(upload): increase file size limit from 10 MB to 100 MB
Updates both frontend and backend to allow uploads up to 100 MB.
Instead of regex-parsing markdown content to find attachment URLs
(fragile), the frontend now tracks uploaded attachment IDs and sends
them with the comment creation request. The backend links them by ID.
Frontend: upload returns attachment ID, comment/reply inputs collect
IDs during editing session, pass as attachment_ids on submit.
Backend: CreateComment accepts attachment_ids, links by ID+issue scope.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Sanitize Content-Disposition filenames to prevent header injection (strip control chars, quotes, semicolons)
- Add CloudFront cookie refresh middleware so cookies are re-issued when expired
- Log errors in groupAttachments instead of silently swallowing them
- Move useFileUpload hook to shared/hooks/ per project architecture conventions
- Add uploadWithToast helper to deduplicate try/catch/toast pattern across 3 components
- Refactor ApiClient.uploadFile to reuse auth headers, 401 handling, and error parsing
- Allow empty MIME types client-side (let server sniff and decide)
- Constrain Image extension max-width in rich-text-editor to prevent layout overflow
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
