fix: 修复request()->scheme()方法不存在的问题

- ApprovalService.getDetailUrl: 改用 request()->isSecure()
- AuthController.qrcodeLogin: 改用 request()->isSecure()

backend/app/controller/AuthController.php

@@ -287,7 +287,12 @@ class AuthController extends BaseController
             ]);
 
             // 构建扫码登录 URL（使用数据库中配置的回调地址）
-            $callbackUrl = $feishuApp->mobile_callback_url ?? request()->scheme() . '://' . request()->host() . '/login/callback';
+            if ($feishuApp->mobile_callback_url) {
+                $callbackUrl = $feishuApp->mobile_callback_url;
+            } else {
+                $scheme = request()->isSecure() ? 'https' : 'http';
+                $callbackUrl = $scheme . '://' . request()->host() . '/login/callback';
+            }
             $redirectUri = urlencode($callbackUrl);
             $authUrl = "https://passport.feishu.cn/suite/passport/oauth/authorize?client_id={$feishuApp->app_id}&redirect_uri={$redirectUri}&response_type=code&state={$loginSession->id}";
 

backend/app/service/ApprovalService.php

@@ -502,7 +502,13 @@ class ApprovalService
      */
     private function getDetailUrl(ApprovalOrder $order): string
     {
-        $baseUrl = config('feishu_notification.base_url') ?? request()->scheme() . '://' . request()->host();
+        $baseUrl = config('feishu_notification.base_url');
+
+        // 如果没有配置，使用当前请求构建
+        if (!$baseUrl) {
+            $scheme = request()->isSecure() ? 'https' : 'http';
+            $baseUrl = $scheme . '://' . request()->host();
+        }
 
         // 统一使用审批详情页，不再跳转到具体业务模块的详情页
         return "{$baseUrl}/approval/detail/{$order->id}";