- Add capsule_reports table and admin UI: new /capsule-reports page with list/update handlers
- POST /capsules/:id/entries/:entryId/report: members can report encrypted entries with voluntary decrypted sample
- GET /image-proxy: stream external images (Reddit, GifCities) through server to hide client IPs
- group_chat_tab: add GIF picker, report button, proxy external GIF URLs through ApiConfig.proxyImageUrl()
- api.ts: add list
Both were wired in Flutter but missing from Go routes:
- GET /media/sign?path=X — resolves R2 relative keys to full URLs
- GET /users/by-handle/:handle — profile lookup for capsule invite flow
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
