修复权限判断问题

src/app/api/admin/theme/route.ts

@@ -92,13 +92,10 @@ export async function POST(request: NextRequest) {
 
     const adminConfig = await getConfig();
 
-    // 权限校验
+    // 权限校验 - 使用v2用户系统
     if (username !== process.env.USERNAME) {
-      // 管理员
-      const user = adminConfig.UserConfig.Users.find(
-        (u) => u.username === username
-      );
-      if (!user || user.role !== 'admin' || user.banned) {
+      const userInfo = await db.getUserInfoV2(username);
+      if (!userInfo || userInfo.role !== 'admin' || userInfo.banned) {
         return NextResponse.json({ error: '权限不足' }, { status: 401 });
       }
     }