后端流量记录排序改为更精确时间优先（避免只按 record_at 导致排序/分钟不准）

StatController.php (E:/code/php/Xboard-new/app/Http/Controllers/V1/User/StatController.php:22)
     StatController.php (E:/code/php/Xboard-new/app/Http/Controllers/V2/Admin/StatController.php:242)
  2. 流量资源新增 display_at（优先 updated_at，回退 created_at/record_at）
     TrafficLogResource.php (E:/code/php/Xboard-new/app/Http/Resources/TrafficLogResource.php:19)
     TrafficLogResource.php (E:/code/php/Xboard-new/app/Http/Resources/TrafficLogResource.php:43)
  3. 管理端前端（打包产物）流量列改为：时间/上行/下行/倍率/节点/设备/总计，时间显示 YYYY/MM/DD HH:mm
     index.js (E:/code/php/Xboard-new/public/assets/admin/assets/index.js:16)

app/Http/Controllers/V1/User/StatController.php

@@ -19,7 +19,9 @@ class StatController extends Controller
             ->with(['server:id,name'])
             ->where('user_id', $userId)
             ->where('record_at', '>=', $startDate)
-            ->orderBy('record_at', 'DESC')
+            ->orderByDesc('updated_at')
+            ->orderByDesc('created_at')
+            ->orderByDesc('record_at')
             ->get();
 
         $deviceMap = $this->buildNodeDeviceMap($userId);

app/Http/Controllers/V2/Admin/StatController.php

@@ -239,7 +239,9 @@ class StatController extends Controller
         $userId = (int) $request->input('user_id');
         $records = StatUser::query()
             ->with(['server:id,name'])
-            ->orderBy('record_at', 'DESC')
+            ->orderByDesc('updated_at')
+            ->orderByDesc('created_at')
+            ->orderByDesc('record_at')
             ->where('user_id', $userId)
             ->paginate($pageSize);