Revert "fix: resolve PHPStan static analysis warnings"

This reverts commit 2d3e4b4a95.

app/Http/Controllers/V2/Admin/Server/GroupController.php

@@ -14,15 +14,15 @@ class GroupController extends Controller
 {
     public function fetch(Request $request): JsonResponse
     {
+
         $serverGroups = ServerGroup::query()
             ->orderByDesc('id')
             ->withCount('users')
-            ->get();
-
-        // 只在需要时手动加载server_count
-        $serverGroups->each(function ($group) {
-            $group->setAttribute('server_count', $group->server_count);
-        });
+            ->get()
+            ->transform(function ($group) {
+                $group->server_count = $group->servers()->count();
+                return $group;
+            });
 
         return $this->success($serverGroups);
     }