fix: audit fixes — tier-quota bypass, webhook SSRF, auth hardening, pagination, a11y

Full audit (bugs/UI-UX/backend/feature-gap) turned up a money-leak AI quota
bypass, webhook SSRF, and a long tail of missing pagination/auth/a11y work.
Fixes land together since HANDOFF.md tracked them as one backlog.

- AI routes charge tier quota before generating; nutrition POST is author-only
- Webhook dispatch re-validates URL per delivery (SSRF/DNS-rebinding), treats
  redirects as failures; recipe.published now actually dispatches
- New indexes/unique constraints on recipes, meal-planning, comments FK cascade
- Recipe PUT/restore snapshot only inside the transaction, after validation
- Recipe DELETE cleans up S3 objects (recipe + review photos)
- Optimistic UI (favorite/star/follow/shopping-list) rolls back on failure
- Upload presign enforces file size cap + per-tier storage quota
- Route-level loading/error/not-found states across (app), admin, and root
- middleware.ts guards (app)/admin; requireAdmin checks DB role, not cached
  session; rate limiting applied to both session and API-key branches,
  bucketed per key; Stripe webhook dedupes by event id
- Pagination added to recipes, feed, profile, comments, pantry, admin tables
- Nav shows real avatar + profile link + dark-mode toggle; destructive actions
  standardized on AlertDialog
- Unsaved-changes guard + real ingredient/step validation on recipe form;
  canonical /recipes/[id] used in-app; next/image migration; aria-labels and
  alt text across icon buttons, avatars, recipe photos
- packages/api-types removed (zero callers, too drifted to safely rewire);
  openapi.ts and ai-keys error shape drift fixed; BYOK decrypt failures now
  surface instead of silently falling back to the platform key

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/components/social/follow-button.tsx

@@ -17,18 +17,21 @@ export function FollowButton({
   const [loading, setLoading] = useState(false);
 
   async function toggle() {
+    const next = !following;
+    setFollowing(next);
     setLoading(true);
     try {
       const res = await fetch(`/api/v1/users/${targetUsername}/follow`, {
-        method: following ? "DELETE" : "POST",
+        method: next ? "POST" : "DELETE",
       });
       if (!res.ok) {
         const err = await res.json() as { error?: string };
-        toast.error(err.error ?? "Failed");
-        return;
+        throw new Error(err.error);
       }
-      setFollowing(!following);
-      toast.success(following ? "Unfollowed" : "Following");
+      toast.success(next ? "Following" : "Unfollowed");
+    } catch (err) {
+      setFollowing(!next);
+      toast.error(err instanceof Error && err.message ? err.message : "Failed");
     } finally {
       setLoading(false);
     }
@@ -36,7 +39,7 @@ export function FollowButton({
 
   return (
     <Button variant={following ? "outline" : "default"} size="sm" onClick={toggle} disabled={loading}>
-      {loading ? "…" : following ? "Following" : "Follow"}
+      {following ? "Following" : "Follow"}
     </Button>
   );
 }