fix: close TOCTOU race + missing checks in tier limits, add AI rate limits, patch CVEs (v0.60.0)

Security audit fixes (see SECURITY_AUDIT.md):
- lib/tiers.ts: checkAndIncrementTierLimit's recipe/storage branches did a
  live count/sum check with no lock tying it to the later write, so two
  concurrent requests near the cap could both pass and both write past the
  limit. Added checkTierLimitInTransaction — holds a per-user Postgres
  advisory lock for the duration of the caller's transaction, so the check
  and the write are atomic together. Applied to every recipe/storage write
  path (recipes create/update, fork, rate, avatar, and 7 AI recipe-creation
  routes).
- Adversarial re-verification of that fix caught a bigger gap in the same
  area: four AI routes (photo import, idea generation, batch-cook,
  translate-to-new-draft) had no recipe-limit check at all. Fixed.
- Added missing per-user rate limits to 5 AI endpoints (adapt, drinks,
  pairings, translate, variations) that had none, unlike their siblings.
- search page now checks for a session server-side, matching every other
  page under (app)/ — defense in depth; the underlying API was already
  public by design and proxy.ts already blocked unauthenticated requests.
- admin/settings route now uses the shared requireAdmin instead of a local
  duplicate.
- Documented two admin support-ticket endpoints missing from the OpenAPI
  spec; verified full route/OpenAPI parity otherwise.
- Bumped drizzle-orm to fix a SQL-identifier-escaping CVE, and overrode two
  transitive deps (esbuild, postcss) with known CVEs. pnpm audit is clean.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/api/v1/ai/batch-cook/generate/route.ts

@@ -8,6 +8,7 @@ import { withAiQuota, resolveAiConfigOrError } from "@/lib/ai/ai-error";
 import { generateBatchCook } from "@/lib/ai/features/generate-batch-cook";
 import { getUserPrivateBio } from "@/lib/ai/user-bio";
 import { parseQuantity } from "@/lib/parse-quantity";
+import { checkTierLimitInTransaction, TierLimitError } from "@/lib/tiers";
 
 const Schema = z.object({
   dinners: z.number().int().min(0).max(6).default(4),
@@ -62,7 +63,9 @@ export async function POST(req: NextRequest) {
 
   const recipeId = crypto.randomUUID();
 
-  await db.transaction(async (tx) => {
+  try {
+    await db.transaction(async (tx) => {
+    await checkTierLimitInTransaction(tx, userId, session!.user.tier as "free" | "pro" | "family", "recipe");
     await tx.insert(recipes).values({
       id: recipeId,
       authorId: userId,
@@ -117,7 +120,13 @@ export async function POST(req: NextRequest) {
         }))
       );
     }
-  });
+    });
+  } catch (err) {
+    if (err instanceof TierLimitError) {
+      return NextResponse.json({ error: "Recipe limit reached for your tier" }, { status: 403 });
+    }
+    throw err;
+  }
 
   return NextResponse.json({ id: recipeId });
 }