fix: 客户端和网关只能通过长连接方式通信，移除 HTTP 注册端点

backend/gateway/internal/ws/client.go

@@ -133,7 +133,64 @@ func (c *Client) handleCommand(msg *Message) {
 	// 这里可以根据命令类型执行不同的操作
 	log.Printf("Received command: %v", msg.Data)
 
-	// 示例：回复命令执行结果
+	// 检查是否是注册命令
+	if cmdData, ok := msg.Data.(map[string]interface{}); ok {
+		if cmdType, ok := cmdData["type"].(string); ok && cmdType == "register" {
+			// 提取注册信息
+			account, accountOk := cmdData["account"].(string)
+			password, passwordOk := cmdData["password"].(string)
+
+			if !accountOk || !passwordOk {
+				// 回复错误信息
+				errorResponse := &Message{
+					Type:    MessageTypeError,
+					Content: "Invalid register command: missing account or password",
+				}
+				c.send <- errorResponse
+				return
+			}
+
+			// 调用用户服务注册
+			if c.hub.userService != nil {
+				// 异步调用用户服务注册
+				go func() {
+					resp, err := c.hub.userService.Register(nil, account, password)
+					if err != nil {
+						// 回复错误信息
+						errorResponse := &Message{
+							Type:    MessageTypeError,
+							Content: "Register failed: " + err.Error(),
+						}
+						c.send <- errorResponse
+						return
+					}
+
+					// 回复成功信息
+					successResponse := &Message{
+						Type:    MessageTypeText,
+						Content: "Register successful",
+						Data: map[string]interface{}{
+							"user_id": resp.UserId,
+							"account": resp.Account,
+							"message": resp.Response.Message,
+							"code":    resp.Response.Code,
+						},
+					}
+					c.send <- successResponse
+				}()
+			} else {
+				// 回复错误信息
+				errorResponse := &Message{
+					Type:    MessageTypeError,
+					Content: "User service not available",
+				}
+				c.send <- errorResponse
+			}
+			return
+		}
+	}
+
+	// 其他命令处理
 	response := &Message{
 		Type:    MessageTypeText,
 		Content: "Command executed successfully",