修复：confirmGift null错误（先保存item再关弹框）；MessageSent改为ShouldBroadcastNow立即广播；修复route()引号冲突

app/Http/Controllers/ShopController.php

@@ -117,8 +117,8 @@ class ShopController extends Controller
                     : '';
                 $sysContent = "{$icon} 【{$user->username}】送出了一张 [{$item->name}]，赠给 {$toStr}！{$msgText}";
 
-                // 广播系统消息到公屏
-                broadcast(new MessageSent(
+                // 广播系统消息到公屏（ShouldBroadcastNow 模式）
+                $sysMsgEvent = new MessageSent(
                     roomId: $roomId,
                     message: [
                         'id' => 0,
@@ -129,7 +129,8 @@ class ShopController extends Controller
                         'color' => '#cc6600',
                         'created_at' => now()->toDateTimeString(),
                     ]
-                ));
+                );
+                broadcast($sysMsgEvent);
             }
         }