feat(web): unified reader with reading settings, faster lists, a11y

- New Reader (desktop + mobile): loads full content on open, prefetches
  the next article, reading progress and time, "Aa" settings (light /
  sepia / dark / auto theme, serif / sans / Atkinson Hyperlegible font,
  size, line height, measure), Space-to-next, keyboard shortcuts, focus
  management, inert background, URL-driven (?a=) so Back closes it.
- Dashboard: cursor pagination, unread/all filter, CSS grid (no masonry),
  no re-sorting under the reader, optimistic cache patches instead of
  refetch storms, "new articles" banner, error/offline states, j/k/o/m/s/v
  shortcuts and help dialog.
- Cards: keyboard-openable, lazy <img>, memoized, touch-only swipe.
- Focus mode: framer drag (drop @use-gesture), Read button, undo restores
  unread state, arrow keys.
- WebSocket: single connection, backoff, cache patching, no console logs.
- Contrast fixes (on-nature tokens), 44px targets, lang="fr", reduced
  motion, self-hosted fonts, theme applied before first paint.
- Code splitting + vendor chunk, prompt-based PWA updates, smaller
  precache, offline cache for opened articles and images, caches cleared
  on logout; upgrade react-router (CVE), drop unused deps and assets.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/package.json

@@ -10,15 +10,16 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@fontsource-variable/inter": "^5.3.0",
+    "@fontsource-variable/lora": "^5.3.0",
+    "@fontsource-variable/playfair-display": "^5.3.0",
+    "@fontsource/atkinson-hyperlegible": "^5.3.0",
     "@tanstack/react-query": "^5.90.20",
-    "@use-gesture/react": "^10.3.1",
     "framer-motion": "^12.34.0",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
-    "react-masonry-css": "^1.0.16",
-    "react-router-dom": "^7.13.0",
+    "react-router-dom": "^7.18.4",
     "react-swipeable": "^7.0.2",
-    "tailwindcss-animate": "^1.0.7",
     "zustand": "^5.0.11"
   },
   "devDependencies": {