feat: moderator-scoped admin access + fix push notifications not displaying (v0.66.0)

Moderator role existed in the schema and was already respected by
comment deletion, but every admin page/route treated moderator
identically to a regular user (403/redirect). Wires it up narrowly:
admin/layout.tsx now lets admin+moderator through and filters the
nav by role, while every admin-only page (users, tiers, settings,
webhooks, insights, etc.) explicitly redirects moderators away via a
new requireFullAdminPage() helper -- the nav filter is UX, this is
the actual gate. Moderators land on Reports and Recipes: reports
GET/PATCH now accept requireAdmin({allowModerator: true}), and a new
PATCH /api/v1/admin/recipes/[id] lets admin+moderator unpublish a
public recipe (flip to private) as a takedown action, audit-logged.

Also found and fixed a real bug while auditing the PWA push pipeline
for a "push click-through" gap: public/sw.js had no `push` event
listener at all, so incoming push messages never displayed anything
-- push was silently non-functional end-to-end despite the
subscribe/send plumbing all working. Added the push listener
(showNotification) and a notificationclick listener that focuses an
existing tab or opens one at the payload's url.

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

apps/web/app/api/v1/admin/recipes/[id]/route.ts

@@ -0,0 +1,43 @@
+import { NextRequest, NextResponse } from "next/server";
+import { randomUUID } from "crypto";
+import { z } from "zod";
+import { requireAdmin } from "@/lib/api-auth";
+import { db, recipes, auditLogs, eq } from "@epicure/db";
+
+const PatchSchema = z.object({
+  action: z.literal("unpublish"),
+});
+
+/** Admin/moderator takedown action — flips a public recipe to private.
+ * Deliberately narrow (just this one transition) rather than exposing full
+ * visibility management here, since that's the recipe owner's call. */
+export async function PATCH(req: NextRequest, { params }: { params: Promise<{ id: string }> }) {
+  const { session, response } = await requireAdmin({ allowModerator: true });
+  if (response) return response;
+
+  const { id } = await params;
+  const parsed = PatchSchema.safeParse(await req.json());
+  if (!parsed.success) {
+    return NextResponse.json({ error: "Validation error", issues: parsed.error.issues }, { status: 400 });
+  }
+
+  const [updated] = await db
+    .update(recipes)
+    .set({ visibility: "private" })
+    .where(eq(recipes.id, id))
+    .returning({ id: recipes.id });
+
+  if (!updated) return NextResponse.json({ error: "Not found" }, { status: 404 });
+
+  await db.insert(auditLogs).values({
+    id: randomUUID(),
+    userId: session!.user.id,
+    action: "admin.recipe.unpublish",
+    targetType: "recipe",
+    targetId: id,
+    metadata: null,
+    createdAt: new Date(),
+  });
+
+  return NextResponse.json({ ok: true });
+}

apps/web/app/api/v1/admin/reports/[id]/route.ts

@@ -8,7 +8,7 @@ interface RouteContext {
 }
 
 export async function PATCH(req: NextRequest, { params }: RouteContext) {
-  const { session, response } = await requireAdmin();
+  const { session, response } = await requireAdmin({ allowModerator: true });
   if (response) return response;
 
   const { id } = await params;

apps/web/app/api/v1/admin/reports/route.ts

@@ -3,7 +3,7 @@ import { requireAdmin } from "@/lib/api-auth";
 import { db, reports, users, eq, desc } from "@epicure/db";
 
 export async function GET() {
-  const { response } = await requireAdmin();
+  const { response } = await requireAdmin({ allowModerator: true });
   if (response) return response;
 
   const rows = await db