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/app/api/v1/upload/presign/route.ts

@@ -3,9 +3,11 @@ import { z } from "zod";
 import { requireSession } from "@/lib/api-auth";
 import { createPresignedUploadUrl } from "@/lib/storage";
 import { db, recipes, eq, and } from "@epicure/db";
+import { checkAndIncrementTierLimit, TierLimitError } from "@/lib/tiers";
 
 const ALLOWED_TYPES = ["image/jpeg", "image/png", "image/webp", "image/avif"] as const;
 type AllowedType = (typeof ALLOWED_TYPES)[number];
+const MAX_FILE_SIZE = 10 * 1024 * 1024;
 
 const Schema = z.object({
   contentType: z.string().refine((t): t is AllowedType => (ALLOWED_TYPES as readonly string[]).includes(t), {
@@ -13,6 +15,7 @@ const Schema = z.object({
   }),
   recipeId: z.string().uuid(),
   purpose: z.enum(["recipe", "review"]).default("recipe"),
+  fileSize: z.number().int().positive().max(MAX_FILE_SIZE, "File exceeds 10MB limit"),
 });
 
 export async function POST(req: NextRequest) {
@@ -25,7 +28,7 @@ export async function POST(req: NextRequest) {
     return NextResponse.json({ error: "Validation error", issues: parsed.error.issues }, { status: 400 });
   }
 
-  const { recipeId, contentType, purpose } = parsed.data;
+  const { recipeId, contentType, purpose, fileSize } = parsed.data;
   const recipe = await db.query.recipes.findFirst({
     where: purpose === "recipe"
       ? and(eq(recipes.id, recipeId), eq(recipes.authorId, session!.user.id))
@@ -37,6 +40,16 @@ export async function POST(req: NextRequest) {
     return NextResponse.json({ error: "Not found" }, { status: 404 });
   }
 
+  try {
+    const sizeMb = Math.ceil(fileSize / (1024 * 1024));
+    await checkAndIncrementTierLimit(session!.user.id, session!.user.tier as "free" | "pro", "storage", sizeMb);
+  } catch (err) {
+    if (err instanceof TierLimitError) {
+      return NextResponse.json({ error: "Storage limit reached for your tier" }, { status: 403 });
+    }
+    throw err;
+  }
+
   const ext = contentType.split("/")[1] ?? "jpg";
   const folder = purpose === "review" ? "reviews" : "photos";
   const key = `recipes/${recipeId}/${folder}/${session!.user.id}-${crypto.randomUUID()}.${ext}`;