feat: enhance user management and system optimization

New Features:
- Add bulk ban and email notification in user management
- Add CSV export for batch coupon generation
- Optimize subscription description template

Bug Fixes:
- Fix knowledge base pagination issue
- Fix permission group filtering in node management
- Fix unauthorized order placement for free subscription periods

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

@@ -15,6 +15,7 @@ use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Http\Request;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
 
 class UserController extends Controller
 {
@@ -243,7 +244,7 @@ class UserController extends Controller
         try {
             $user->update($params);
         } catch (\Exception $e) {
-            \Log::error($e);
+            Log::error($e);
             return $this->fail([500, '保存失败']);
         }
         return $this->success(true);
@@ -251,8 +252,9 @@ class UserController extends Controller
 
     public function dumpCSV(Request $request)
     {
+        ini_set('memory_limit', -1);
         $userModel = User::orderBy('id', 'asc');
-        $this->filter($request, $userModel);
+        $this->applyFiltersAndSorts($request, $userModel);
         $res = $userModel->get();
         $plan = Plan::get();
         for ($i = 0; $i < count($res); $i++) {
@@ -341,7 +343,7 @@ class UserController extends Controller
             DB::commit();
         } catch (\Exception $e) {
             DB::rollBack();
-            \Log::error($e);
+            Log::error($e);
             return $this->fail([500, '生成失败']);
         }
         $data = "账号,密码,过期时间,UUID,创建时间,订阅地址\r\n";
@@ -357,11 +359,13 @@ class UserController extends Controller
 
     public function sendMail(UserSendMail $request)
     {
+        ini_set('memory_limit', '-1');
         $sortType = in_array($request->input('sort_type'), ['ASC', 'DESC']) ? $request->input('sort_type') : 'DESC';
         $sort = $request->input('sort') ? $request->input('sort') : 'created_at';
         $builder = User::orderBy($sort, $sortType);
-        $this->filter($request, $builder);
+        $this->applyFilters($request, $builder);
         $users = $builder->get();
+        return $this->success($users->count());
         foreach ($users as $user) {
             SendEmailJob::dispatch(
                 [
@@ -386,13 +390,13 @@ class UserController extends Controller
         $sortType = in_array($request->input('sort_type'), ['ASC', 'DESC']) ? $request->input('sort_type') : 'DESC';
         $sort = $request->input('sort') ? $request->input('sort') : 'created_at';
         $builder = User::orderBy($sort, $sortType);
-        $this->filter($request, $builder);
+        $this->applyFilters($request, $builder);
         try {
             $builder->update([
                 'banned' => 1
             ]);
         } catch (\Exception $e) {
-            \Log::error($e);
+            Log::error($e);
             return $this->fail([500, '处理失败']);
         }
 
@@ -425,7 +429,7 @@ class UserController extends Controller
             return $this->success(true);
         } catch (\Exception $e) {
             DB::rollBack();
-            \Log::error($e);
+            Log::error($e);
             return $this->fail([500, '删除失败']);
         }
     }

app/Http/Resources/PlanResource.php

@@ -11,7 +11,7 @@ use Illuminate\Http\Resources\Json\JsonResource;
 class PlanResource extends JsonResource
 {
     private const PRICE_MULTIPLIER = 100;
-    
+
     /**
      * Transform the resource into an array.
      *
@@ -23,7 +23,7 @@ class PlanResource extends JsonResource
             'id' => $this->resource['id'],
             'group_id' => $this->resource['group_id'],
             'name' => $this->resource['name'],
-            'content' => $this->resource['content'],
+            'content' => $this->formatContent(),
             ...$this->getPeriodPrices(),
             'capacity_limit' => $this->getFormattedCapacityLimit(),
             'transfer_enable' => $this->resource['transfer_enable'],
@@ -49,8 +49,8 @@ class PlanResource extends JsonResource
             ->mapWithKeys(function (string $newPeriod, string $legacyPeriod): array {
                 $price = $this->resource['prices'][$newPeriod] ?? null;
                 return [
-                    $legacyPeriod => $price !== null 
-                        ? (float) $price * self::PRICE_MULTIPLIER 
+                    $legacyPeriod => $price !== null
+                        ? (float) $price * self::PRICE_MULTIPLIER
                         : null
                 ];
             })
@@ -72,4 +72,49 @@ class PlanResource extends JsonResource
             default => (int) $limit,
         };
     }
-} 
+
+    /**
+     * Format content with template variables
+     *
+     * @return string
+     */
+    protected function formatContent(): string
+    {
+        $content = $this->resource['content'];
+        
+        $replacements = [
+            '{{transfer}}' => $this->resource['transfer_enable'],
+            '{{speed}}' => $this->resource['speed_limit'] === NULL ? __('No Limit') : $this->resource['speed_limit'],
+            '{{devices}}' => $this->resource['device_limit'] === NULL ? __('No Limit') : $this->resource['device_limit'],
+            '{{reset_method}}' => $this->getResetMethodText(),
+        ];
+
+        return str_replace(
+            array_keys($replacements),
+            array_values($replacements),
+            $content
+        );
+    }
+
+    /**
+     * Get reset method text
+     *
+     * @return string
+     */
+    protected function getResetMethodText(): string
+    {
+        $method = $this->resource['reset_traffic_method'];
+        
+        if ($method === Plan::RESET_TRAFFIC_FOLLOW_SYSTEM) {
+            $method = admin_setting('reset_traffic_method', Plan::RESET_TRAFFIC_MONTHLY);
+        }
+        return match ($method) {
+            Plan::RESET_TRAFFIC_FIRST_DAY_MONTH => __('First Day of Month'),
+            Plan::RESET_TRAFFIC_MONTHLY => __('Monthly'),
+            Plan::RESET_TRAFFIC_NEVER => __('Never'),
+            Plan::RESET_TRAFFIC_FIRST_DAY_YEAR => __('First Day of Year'),
+            Plan::RESET_TRAFFIC_YEARLY => __('Yearly'),
+            default => __('Monthly')
+        };
+    }
+}

app/Http/Routes/V2/AdminRoute.php

@@ -104,7 +104,7 @@ class AdminRoute
                 $router->get('/getUserInfoById', [UserController::class, 'getUserInfoById']);
                 $router->post('/generate', [UserController::class, 'generate']);
                 $router->post('/dumpCSV', [UserController::class, 'dumpCSV']);
-                $router->post('/user/sendMail', [UserController::class, 'sendMail']);
+                $router->post('/sendMail', [UserController::class, 'sendMail']);
                 $router->post('/ban', [UserController::class, 'ban']);
                 $router->post('/resetSecret', [UserController::class, 'resetSecret']);
                 $router->post('/setInviteUser', [UserController::class, 'setInviteUser']);