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>

CLAUDE.md

@@ -36,7 +36,6 @@ pnpm db:studio             # open Drizzle Studio
 **Monorepo** (pnpm workspaces):
 - `apps/web` — Next.js 15 App Router app (`@epicure/web`)
 - `packages/db` — Drizzle ORM schema + client (`@epicure/db`)
-- `packages/api-types` — Zod schemas, single source of truth for API types + OpenAPI (`@epicure/api-types`)
 
 **Route groups in `apps/web/app/`**:
 - `(auth)/` — login, signup, verify-email (no auth required)
@@ -66,7 +65,7 @@ cd apps/web && pnpm dlx shadcn@latest add <component-name>
 1. Edit `packages/db/src/schema/*.ts`
 2. `pnpm db:generate` — creates migration file
 3. `pnpm db:migrate` — applies it
-4. Update corresponding Zod schemas in `packages/api-types/src/`
+4. Update the corresponding inline Zod schemas in the affected `apps/web/app/api/v1/**/route.ts` files (and `apps/web/lib/openapi.ts` if documented there)
 
 ## Environment Variables