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/src/api/feeds.ts

@@ -1,4 +1,4 @@
-import { API_BASE, handleResponse } from './client';
+import { API_BASE, handleResponse, apiFetch } from './client';
 
 export interface Feed {
     id: string;
@@ -20,11 +20,8 @@ export interface AddFeedRequest {
 }
 
 export const feedsApi = {
-    async list(): Promise<Feed[]> {
-        const response = await fetch(`${API_BASE}/feeds`, {
-            credentials: 'include',
-        });
-        return handleResponse<Feed[]>(response);
+    list(): Promise<Feed[]> {
+        return apiFetch<Feed[]>('/feeds');
     },
 
     async add(data: AddFeedRequest): Promise<Feed> {
@@ -62,12 +59,8 @@ export const feedsApi = {
         await handleResponse(response);
     },
 
-    async refresh(): Promise<{ message: string }> {
-        const response = await fetch(`${API_BASE}/feeds/refresh`, {
-            method: 'POST',
-            credentials: 'include',
-        });
-        return handleResponse(response);
+    refresh(): Promise<{ message: string }> {
+        return apiFetch('/feeds/refresh', { method: 'POST' });
     },
 
     async importOPML(file: File): Promise<{ imported: number; skipped: number; errors?: string[] }> {