d98e3117b2
Bundles the backend+frontend delta-upload (content-dedup) feature with a batch of frontend fixes from this session. Upload / dedup: - Client-hashed delta & instant upload (deltaUpload, hashWasm vendor shim) - Backend dedup batch endpoint (dedup_service, dedup_handler, routes) - session store owned-hash helpers; unit tests + upload-strategy bench Frontend UI/UX: - Colour file-type icons in grid/list (per-type tinted tiles + glyph hue) - Robust thumbnail fallback; PDFs now show their type icon (backend generates no PDF thumbnails) instead of a blank tile - Fix PDF preview: load via a same-origin blob: iframe — the API URL is blocked by the global X-Frame-Options: DENY in the browser's framed PDF viewer, matching the existing CSP `frame-src blob:` design - Groups: localized virtual-group description (no DB schema-note leak), add nav.groups to the 15 missing locales, fix primary-button contrast - Repoint --color-text-light → --color-on-accent (was faint grey on accent) - Nudge the admin role badge off the user-menu header divider Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>