fix: 删除数据连接时，默认选中列表的第一个

src/modules/pages/connection/list/list_item/list_item.model.ts

@@ -102,7 +102,7 @@ export class ListItemModel extends Model<{
                     item.connectionData = JSON.parse(item.connectionData as string);
                 });
                 if (name === this.model.connectionSelected) {
-                    this.model.connectionSelected = '';
+                    this.model.connectionSelected = BI.size(this.model.connections) > 0 ? this.model.connections[0].connectionName : '';
                 }
                 api.shutdownConnectionStatus(name);
             });