feat(devices): 设备列表增加国家筛选项

与访问记录列表实现保持一致：
- DeviceController::index() 向视图传入 countries (CfIpCountry::names())
- filtersFrom() 解析 country 参数 (CfIpCountry::normalize，支持 ISO 代码与中文名)
- filteredQuery() 按 devices.country 过滤
- 视图在 iOS 版本与钱包之间新增 lay-search 国家下拉框
- 重置按钮 reload where 增加 country: ''

app/Http/Controllers/Admin/DeviceController.php

@@ -45,6 +45,7 @@ class DeviceController extends Controller
         return view('admin.devices.index', [
             'portal' => $this->portal(),
             'agents' => $agents,
+            'countries' => CfIpCountry::names(),
         ]);
     }
 
@@ -851,6 +852,7 @@ class DeviceController extends Controller
             'model' => trim((string) $request->query('model', '')),
             'ip' => trim((string) $request->query('ip', '')),
             'ios' => trim((string) $request->query('ios', '')),
+            'country' => CfIpCountry::normalize((string) $request->query('country', '')),
             'installed_from' => trim((string) $request->query('installed_from', '')),
             'installed_to' => trim((string) $request->query('installed_to', '')),
             'has_wallet' => $hasWalletInt,
@@ -860,7 +862,7 @@ class DeviceController extends Controller
     }
 
     /**
-     * @param  array{device_key: string, chain: ?int, channel_id: string, model: string, ip: string, ios: string, installed_from: string, installed_to: string, has_wallet: ?int, has_im: string, agent_user_id: ?int}  $filters
+     * @param  array{device_key: string, chain: ?int, channel_id: string, model: string, ip: string, ios: string, country: ?string, installed_from: string, installed_to: string, has_wallet: ?int, has_im: string, agent_user_id: ?int}  $filters
      */
     private function filteredQuery(array $filters): Builder
     {
@@ -885,6 +887,9 @@ class DeviceController extends Controller
         if ($filters['ios'] !== '') {
             $q->where('devices.ios_version', 'like', '%'.$filters['ios'].'%');
         }
+        if ($filters['country'] !== null) {
+            $q->where('devices.country', $filters['country']);
+        }
         if ($filters['installed_from'] !== '' && preg_match('/^\d{4}-\d{2}-\d{2}/', $filters['installed_from'])) {
             $q->whereDate('devices.created_at', '>=', substr($filters['installed_from'], 0, 10));
         }