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/lib/ai/__tests__/resolve-user-key.test.ts

@@ -20,7 +20,7 @@ vi.mock("@epicure/db", () => ({
   and: vi.fn((...args) => args),
 }));
 
-const { getDefaultProviderWithKey, getModelConfigForUseCase, withUserKey } = await import("../resolve-user-key");
+const { getDefaultProviderWithKey, getModelConfigForUseCase, withUserKey, ByokDecryptError } = await import("../resolve-user-key");
 
 beforeEach(() => {
   vi.clearAllMocks();
@@ -74,15 +74,13 @@ describe("getDefaultProviderWithKey", () => {
     expect(config.apiKey).toBe("sk-from-site-settings");
   });
 
-  it("skips corrupted BYOK key and tries next provider", async () => {
+  it("throws ByokDecryptError instead of silently falling back on a corrupted BYOK key", async () => {
     mockUserAiKeysFindMany.mockResolvedValue([
       { provider: "openrouter", encryptedKey: "CORRUPT:NOT:VALID" },
       { provider: "openai", encryptedKey: encrypt("sk-valid") },
     ]);
 
-    const config = await getDefaultProviderWithKey("user1");
-    expect(config.provider).toBe("openai");
-    expect(config.apiKey).toBe("sk-valid");
+    await expect(getDefaultProviderWithKey("user1")).rejects.toThrow(ByokDecryptError);
   });
 });