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

app/api/admin/reserved/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 { RESERVED_SUBDOMAINS } from '@/lib/validation';
+import { jsonNoStore } from '@/lib/admin/response';
 
 export const runtime = 'nodejs';
 export const dynamic = 'force-dynamic';
@@ -19,10 +20,11 @@ export async function GET() {
     .select('name, created_at')
     .order('name', { ascending: true });
   if (error) {
-    return NextResponse.json({ error: error.message }, { status: 500 });
+    console.error('admin reserved list failed', error);
+    return jsonNoStore({ error: 'internal error' }, { status: 500 });
   }
 
-  return NextResponse.json({
+  return jsonNoStore({
     reserved: data ?? [],
     hardcoded: Array.from(RESERVED_SUBDOMAINS).sort(),
   });
@@ -36,14 +38,14 @@ export async function POST(req: NextRequest) {
   try {
     body = (await req.json()) as { name?: unknown };
   } catch {
-    return NextResponse.json({ error: 'invalid json' }, { status: 400 });
+    return jsonNoStore({ error: 'invalid json' }, { status: 400 });
   }
   if (typeof body.name !== 'string') {
-    return NextResponse.json({ error: 'name must be a string' }, { status: 400 });
+    return jsonNoStore({ error: 'name must be a string' }, { status: 400 });
   }
   const name = body.name.trim().toLowerCase();
   if (!NAME_RE.test(name)) {
-    return NextResponse.json(
+    return jsonNoStore(
       { error: 'name must be 1–63 chars, lowercase a–z, 0–9, hyphen' },
       { status: 400 },
     );
@@ -54,7 +56,8 @@ export async function POST(req: NextRequest) {
     .from('reserved_subdomains')
     .upsert({ name }, { onConflict: 'name' });
   if (error) {
-    return NextResponse.json({ error: error.message }, { status: 500 });
+    console.error('admin reserved add failed', error);
+    return jsonNoStore({ error: 'internal error' }, { status: 500 });
   }
 
   await logAdminAction(auth.user, {
@@ -63,7 +66,7 @@ export async function POST(req: NextRequest) {
     target_id: name,
   });
 
-  return NextResponse.json({ ok: true, name });
+  return jsonNoStore({ ok: true, name });
 }
 
 export async function DELETE(req: NextRequest) {
@@ -73,7 +76,7 @@ export async function DELETE(req: NextRequest) {
   const url = new URL(req.url);
   const name = (url.searchParams.get('name') ?? '').trim().toLowerCase();
   if (!name) {
-    return NextResponse.json({ error: 'name is required' }, { status: 400 });
+    return jsonNoStore({ error: 'name is required' }, { status: 400 });
   }
 
   const admin = getSupabaseAdmin();
@@ -82,7 +85,8 @@ export async function DELETE(req: NextRequest) {
     .delete()
     .eq('name', name);
   if (error) {
-    return NextResponse.json({ error: error.message }, { status: 500 });
+    console.error('admin reserved remove failed', error);
+    return jsonNoStore({ error: 'internal error' }, { status: 500 });
   }
 
   await logAdminAction(auth.user, {
@@ -91,5 +95,5 @@ export async function DELETE(req: NextRequest) {
     target_id: name,
   });
 
-  return NextResponse.json({ ok: true });
+  return jsonNoStore({ ok: true });
 }