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/recipes/[id]/nutrition/route.ts

@@ -2,6 +2,8 @@ import { NextRequest, NextResponse } from "next/server";
 import { db, recipes, recipeIngredients } from "@epicure/db";
 import { eq, and, or, ne } from "@epicure/db";
 import { requireSession } from "@/lib/api-auth";
+import { applyRateLimit } from "@/lib/rate-limit";
+import { withAiQuota } from "@/lib/ai/ai-error";
 import { estimateNutrition } from "@/lib/ai/features/estimate-nutrition";
 
 type Params = { params: Promise<{ id: string }> };
@@ -31,14 +33,12 @@ export async function POST(_req: NextRequest, { params }: Params) {
   if (response) return response;
   const { id } = await params;
 
+  const limited = await applyRateLimit(`rl:ai:${session!.user.id}`, 10, 60);
+  if (limited) return limited;
+
+  // Only the recipe author may trigger a (paid) nutrition estimate
   const recipe = await db.query.recipes.findFirst({
-    where: and(
-      eq(recipes.id, id),
-      or(
-        eq(recipes.authorId, session!.user.id),
-        ne(recipes.visibility, "private")
-      )
-    ),
+    where: and(eq(recipes.id, id), eq(recipes.authorId, session!.user.id)),
     with: {
       ingredients: { orderBy: (t, { asc }) => asc(t.order) },
     },
@@ -46,17 +46,20 @@ export async function POST(_req: NextRequest, { params }: Params) {
 
   if (!recipe) return NextResponse.json({ error: "Not found" }, { status: 404 });
 
-  const result = await estimateNutrition({
-    title: recipe.title,
-    baseServings: recipe.baseServings,
-    ingredients: recipe.ingredients.map((i) => ({
-      rawName: i.rawName,
-      quantity: i.quantity,
-      unit: i.unit,
-    })),
-  });
+  const result = await withAiQuota(session!.user.id, session!.user.tier as "free" | "pro", () =>
+    estimateNutrition({
+      title: recipe.title,
+      baseServings: recipe.baseServings,
+      ingredients: recipe.ingredients.map((i) => ({
+        rawName: i.rawName,
+        quantity: i.quantity,
+        unit: i.unit,
+      })),
+    })
+  );
+  if (!result.ok) return result.response;
 
-  await db.update(recipes).set({ nutritionData: result }).where(and(eq(recipes.id, id), eq(recipes.authorId, session!.user.id)));
+  await db.update(recipes).set({ nutritionData: result.data }).where(and(eq(recipes.id, id), eq(recipes.authorId, session!.user.id)));
 
-  return NextResponse.json({ nutrition: result });
+  return NextResponse.json({ nutrition: result.data });
 }