fix: 修复 WebSocket 发送逻辑的语法错误并移除重复连接代码

修复了多余的闭合大括号，同时移除了重复的连接触发代码，避免不必要的连接调用

src/views/Student/CustomWebsocketProvider.ts

@@ -297,9 +297,6 @@ export class YjsRedisProvider extends Observable<string> {
     if (this.ws?.readyState === WebSocket.OPEN) {
       this.ws.send(data)
     }
-    }
-    this.shouldConnect = true
-    this.connect()
   }
 
   public disconnect(): void {