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/meal-plan/generate/route.ts

@@ -5,7 +5,7 @@ import { requireSessionOrApiKey } from "@/lib/api-auth";
 import { applyRateLimit } from "@/lib/rate-limit";
 import { getDefaultProviderWithKey } from "@/lib/ai/resolve-user-key";
 import { withAiQuota, resolveAiConfigOrError } from "@/lib/ai/ai-error";
-import { checkAndIncrementTierLimit, TierLimitError } from "@/lib/tiers";
+import { checkTierLimitInTransaction, TierLimitError } from "@/lib/tiers";
 import { generateMealPlan } from "@/lib/ai/features/generate-meal-plan";
 import { getUserPrivateBio } from "@/lib/ai/user-bio";
 
@@ -93,17 +93,6 @@ export async function POST(req: NextRequest) {
   if (!result.ok) return result.response;
   const plan = result.data;
 
-  // Each plan entry creates a draft recipe — check the recipe limit covers
-  // all of them before inserting anything.
-  try {
-    await checkAndIncrementTierLimit(userId, session!.user.tier as "free" | "pro" | "family", "recipe", plan.entries.length);
-  } catch (err) {
-    if (err instanceof TierLimitError) {
-      return NextResponse.json({ error: "Recipe limit reached for your tier" }, { status: 403 });
-    }
-    throw err;
-  }
-
   // Ensure meal plan row exists for the week
   let mealPlan = await db.query.mealPlans.findFirst({
     where: and(eq(mealPlans.userId, userId), eq(mealPlans.weekStart, parsed.data.weekStart)),
@@ -117,7 +106,11 @@ export async function POST(req: NextRequest) {
 
   const createdEntries: Array<{ id: string; day: string; mealType: string; recipeId: string; recipeTitle: string }> = [];
 
-  await db.transaction(async (tx) => {
+  try {
+    await db.transaction(async (tx) => {
+    // Each plan entry creates a draft recipe — check the recipe limit covers
+    // all of them before inserting anything.
+    await checkTierLimitInTransaction(tx, userId, session!.user.tier as "free" | "pro" | "family", "recipe", plan.entries.length);
     for (const entry of plan.entries) {
       // Create draft recipe
       const recipeId = crypto.randomUUID();
@@ -184,7 +177,13 @@ export async function POST(req: NextRequest) {
 
       createdEntries.push({ id: entryId, day: entry.day, mealType: entry.mealType, recipeId, recipeTitle: entry.recipe.title });
     }
-  });
+    });
+  } catch (err) {
+    if (err instanceof TierLimitError) {
+      return NextResponse.json({ error: "Recipe limit reached for your tier" }, { status: 403 });
+    }
+    throw err;
+  }
 
   return NextResponse.json({ weekStart: parsed.data.weekStart, entries: createdEntries });
 }