refactor: 重构配置管理，使用强类型配置结构并更新相关代码

main.go

@@ -25,7 +25,7 @@ func main() {
 	go func() {
 		const reconnectDelay = 5 * time.Second
 		for {
-			client, err := wsclient.NewWebSocketClient("ws", config.ConfigManager.GetProperty("napcat_srv"), "")
+			client, err := wsclient.NewWebSocketClient("ws", config.ConfigManager.GetConfig().NapcatWsSrv, "")
 			if err != nil {
 				log.Printf("WebSocket连接失败: %v, %v 后重试", err, reconnectDelay)
 				time.Sleep(reconnectDelay)