- Dockerfile: add ffmpeg (Alpine).
- static.js: new /thumbs/<id> — ffmpeg extracts the first frame (0.5s), caches it next to
the file, serves as the video poster (cosmetic; 404s gracefully if ffmpeg unavailable).
- static.js: /files now supports HTTP Range (206 Partial Content) + Accept-Ranges, which
iOS requires to stream/seek video reliably (fixes the buffer-before-play / multi-tap);
media (image/video/audio) now served inline, other files still download. Shared
attachment auth refactored into one helper used by /files and /thumbs.
- home.html: video poster points at /thumbs/<id>. build batch157.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Sravan
avinash