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/ai/meal-plan/generate/route.ts

@@ -4,7 +4,8 @@ import { db, recipes, recipeIngredients, recipeSteps, mealPlans, mealPlanEntries
 import { requireSession } from "@/lib/api-auth";
 import { applyRateLimit } from "@/lib/rate-limit";
 import { getDefaultProviderWithKey } from "@/lib/ai/resolve-user-key";
-import { aiErrorResponse } from "@/lib/ai/ai-error";
+import { withAiQuota, resolveAiConfigOrError } from "@/lib/ai/ai-error";
+import { checkAndIncrementTierLimit, incrementUsage, TierLimitError } from "@/lib/tiers";
 import { generateMealPlan } from "@/lib/ai/features/generate-meal-plan";
 import { getUserPrivateBio } from "@/lib/ai/user-bio";
 
@@ -35,10 +36,12 @@ export async function POST(req: NextRequest) {
 
   const userId = session!.user.id;
   const locale = (session!.user as { locale?: string }).locale ?? "en";
-  const [config, privateBio] = await Promise.all([
-    getDefaultProviderWithKey(userId),
+  const [configResult, privateBio] = await Promise.all([
+    resolveAiConfigOrError(() => getDefaultProviderWithKey(userId)),
     getUserPrivateBio(userId),
   ]);
+  if (!configResult.ok) return configResult.response;
+  const config = configResult.data;
 
   // pantryMode forces usePantry on so pantry items are always fetched when maximizing pantry use
   const effectiveUsePantry = parsed.data.usePantry || parsed.data.pantryMode;
@@ -53,9 +56,8 @@ export async function POST(req: NextRequest) {
     pantryItemNames = pantry.map((p) => p.rawName);
   }
 
-  let plan;
-  try {
-    plan = await generateMealPlan(
+  const result = await withAiQuota(userId, session!.user.tier as "free" | "pro", () =>
+    generateMealPlan(
       {
         dietaryPrefs: parsed.data.dietaryPrefs,
         servings: parsed.data.servings,
@@ -66,9 +68,26 @@ export async function POST(req: NextRequest) {
       },
       { ...config, userContext: privateBio ?? undefined },
       locale
-    );
+    )
+  );
+  if (!result.ok) return result.response;
+  const plan = result.data;
+
+  // Each plan entry creates a draft recipe — charge the recipe limit for all
+  // of them before inserting anything, refunding on breach so a rejected plan
+  // doesn't consume quota.
+  let chargedRecipes = 0;
+  try {
+    for (let i = 0; i < plan.entries.length; i++) {
+      await checkAndIncrementTierLimit(userId, session!.user.tier as "free" | "pro", "recipe");
+      chargedRecipes++;
+    }
   } catch (err) {
-    return aiErrorResponse(err);
+    if (err instanceof TierLimitError) {
+      if (chargedRecipes > 0) await incrementUsage(userId, "recipe", -chargedRecipes);
+      return NextResponse.json({ error: "Recipe limit reached for your tier" }, { status: 403 });
+    }
+    throw err;
   }
 
   // Ensure meal plan row exists for the week