fix(admin): fresh SSR reads, atomic user delete + sanitized errors, cookie-rotation in middleware, no-store on admin APIs

app/api/admin/tunnels/[id]/quota/route.ts

@@ -1,8 +1,9 @@
-import { NextResponse, type NextRequest } from 'next/server';
+import { type NextRequest } from 'next/server';
 import { requireAdminApi } from '@/lib/auth/admin-guard';
 import { getSupabaseAdmin } from '@/lib/supabase/admin';
 import { logAdminAction } from '@/lib/auth/audit';
 import { isUuid, parsePositiveInt } from '@/lib/admin/validators';
+import { jsonNoStore } from '@/lib/admin/response';
 
 export const runtime = 'nodejs';
 export const dynamic = 'force-dynamic';
@@ -19,18 +20,18 @@ export async function POST(
 
   const { id } = params;
   if (!isUuid(id)) {
-    return NextResponse.json({ error: 'invalid tunnel id' }, { status: 400 });
+    return jsonNoStore({ error: 'invalid tunnel id' }, { status: 400 });
   }
 
   let body: { quota_bytes?: unknown };
   try {
     body = (await req.json()) as { quota_bytes?: unknown };
   } catch {
-    return NextResponse.json({ error: 'invalid json' }, { status: 400 });
+    return jsonNoStore({ error: 'invalid json' }, { status: 400 });
   }
   const parsed = parsePositiveInt(body.quota_bytes, MAX_QUOTA);
   if (!parsed.ok) {
-    return NextResponse.json(
+    return jsonNoStore(
       { error: `quota_bytes ${parsed.error}` },
       { status: 400 },
     );
@@ -44,10 +45,11 @@ export async function POST(
     .select('subdomain')
     .maybeSingle<{ subdomain: string }>();
   if (error) {
-    return NextResponse.json({ error: error.message }, { status: 500 });
+    console.error('admin tunnel.quota failed', error);
+    return jsonNoStore({ error: 'internal error' }, { status: 500 });
   }
   if (!data) {
-    return NextResponse.json({ error: 'tunnel not found' }, { status: 404 });
+    return jsonNoStore({ error: 'tunnel not found' }, { status: 404 });
   }
 
   await logAdminAction(auth.user, {
@@ -57,5 +59,5 @@ export async function POST(
     details: { subdomain: data.subdomain, quota_bytes: parsed.value },
   });
 
-  return NextResponse.json({ ok: true, quota_bytes: parsed.value });
+  return jsonNoStore({ ok: true, quota_bytes: parsed.value });
 }