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/adapt/[id]/route.ts

@@ -3,11 +3,12 @@ import { z } from "zod";
 import { and, eq } from "@epicure/db";
 import { db, recipes, recipeIngredients, recipeSteps, recipeVariations } from "@epicure/db";
 import { requireSessionOrApiKey } from "@/lib/api-auth";
+import { applyRateLimit } from "@/lib/rate-limit";
 import { withAiQuota, resolveAiConfigOrError } from "@/lib/ai/ai-error";
 import { adaptRecipe } from "@/lib/ai/features/adapt-recipe";
 import { withUserKey } from "@/lib/ai/resolve-user-key";
 import { getUserPrivateBio } from "@/lib/ai/user-bio";
-import { checkAndIncrementTierLimit, TierLimitError } from "@/lib/tiers";
+import { checkTierLimitInTransaction, TierLimitError } from "@/lib/tiers";
 import { isRecipeUnchanged } from "@/lib/recipe-diff";
 
 const Schema = z.object({
@@ -23,8 +24,11 @@ export async function POST(req: NextRequest, { params }: Params) {
   const { session, response } = await requireSessionOrApiKey(req);
   if (response) return response;
 
-  const { id } = await params;
   const userId = session!.user.id;
+  const limited = await applyRateLimit(`rl:ai:${userId}`, 10, 60);
+  if (limited) return limited;
+
+  const { id } = await params;
 
   const recipe = await db.query.recipes.findFirst({
     where: and(eq(recipes.id, id)),
@@ -81,20 +85,12 @@ export async function POST(req: NextRequest, { params }: Params) {
     return NextResponse.json({ id: recipe.id, adaptationNotes: adapted.adaptationNotes, unchanged: true });
   }
 
-  try {
-    await checkAndIncrementTierLimit(userId, session!.user.tier as "free" | "pro" | "family", "recipe");
-  } catch (err) {
-    if (err instanceof TierLimitError) {
-      return NextResponse.json({ error: "Recipe limit reached for your tier" }, { status: 403 });
-    }
-    throw err;
-  }
-
   const newId = crypto.randomUUID();
   const now = new Date();
 
   try {
     await db.transaction(async (tx) => {
+      await checkTierLimitInTransaction(tx, userId, session!.user.tier as "free" | "pro" | "family", "recipe");
       await tx.insert(recipes).values({
         id: newId,
         authorId: userId,
@@ -147,7 +143,10 @@ export async function POST(req: NextRequest, { params }: Params) {
         createdAt: now,
       });
     });
-  } catch {
+  } catch (err) {
+    if (err instanceof TierLimitError) {
+      return NextResponse.json({ error: "Recipe limit reached for your tier" }, { status: 403 });
+    }
     return NextResponse.json({ error: "Failed to save the adapted recipe. Please try again." }, { status: 500 });
   }