feat: 添加 WebSocket 基础设施

src/main/java/com/webgame/webgamebackend/config/WebSocketConfig.java

@@ -0,0 +1,28 @@
+package com.webgame.webgamebackend.config;
+
+import com.webgame.webgamebackend.ws.RoomWebSocketHandler;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.socket.config.annotation.EnableWebSocket;
+import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
+import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
+
+/**
+ * WebSocket 配置
+ *
+ * 注册房间 WebSocket 端点，路径为 /ws/room。
+ * 客户端通过 ws://host/ws/room?roomId=xxx&token=xxx 连接。
+ */
+@Configuration
+@EnableWebSocket
+@RequiredArgsConstructor
+public class WebSocketConfig implements WebSocketConfigurer {
+
+    private final RoomWebSocketHandler roomWebSocketHandler;
+
+    @Override
+    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
+        registry.addHandler(roomWebSocketHandler, "/ws/room")
+                .setAllowedOrigins("*");
+    }
+}