Opening query tool without selecting a database object after establishing a connection causes a crash

[WeiJie-JL]

Issue Content:
Description:
After establishing a connection, if no database object (such as tables, views, etc.) is selected, opening the query tool directly causes the application to crash.

Steps to Reproduce:

1、In the previous connection, select a database or table object.
2、Collapse the list to the service group level.
3、Recreate the connection without selecting any object. At this point, the query tool is clickable.
4、Click the query tool, and the page crashes.
Expected Behavior:
The query tool should open normally even if no database object is selected.

Actual Behavior:
The application crashes.

Environment:

Operating System: macos 15.2
Database Version:14
Application Version:8.14
Additional Information:Screen recording

2024-12-19.09.24.08-1.mov