fix route code

      // 配置表，每条线路单独定义方向映射 & 颜色

      const routeConfig = {

        XYBS1: {

          name: '1',

          directions: { '0': '欣园 Joy Highland', '1': '工学院 COE' },

          color: '#f7911d'

        },

        XYBS2: {

          name: '2',

          directions: { '0': '欣园 Joy Highland', '1': '科研楼' },

          color: '#29abe2'

        },

        SEV1: { // 新增的路线

          name: '电瓶车',

          directions: { '-1': '' },

          color: '#7030a1'

        }

      };

      // 使用时直接查表

      const lineNum = bus.route_code;

      const lineNum = routeConfig[bus.route_code]?.name || bus.route_code;

      const config = routeConfig[bus.route_code] || {};

      const direction = config.directions?.[bus.route_dir] ?? '';

      const color = config.color ?? '#cccccc';