feat: 重构管理员权限管理，移除 AdminPermission 模型，整合权限与角色管理逻辑，优化 API 接口以支持角色与权限的同步，增强数据库填充器以对齐权限配置

app/Http/Controllers/Api/V1/Admin/User/AdminUserIndexController.php

@@ -18,7 +18,7 @@ final class AdminUserIndexController extends Controller
         $keyword = trim((string) $request->query('keyword', ''));
 
         $q = AdminUser::query()
-            ->with(['roles.permissions', 'permissions'])
+            ->with(['roles'])
             ->orderByDesc('id');
 
         if ($keyword !== '') {
@@ -54,11 +54,7 @@ final class AdminUserIndexController extends Controller
             'email' => $user->email,
             'status' => (int) $user->status,
             'roles' => $user->adminRoleSlugs(),
-            'direct_permissions' => $user->permissions
-                ->pluck('slug')
-                ->filter(static fn ($slug): bool => is_string($slug) && $slug !== '')
-                ->values()
-                ->all(),
+            'direct_permissions' => $user->directLegacyPermissionSlugs(),
             'effective_permissions' => $user->adminPermissionSlugs(),
         ];
     }