Adjustment of Window Behavior

[Richasy]

Close #13

1. When the default height of the window exceeds the current screen height, adjust the window height accordingly.
2. Remember the last position where the window was closed and open it in the designated position upon the next launch.

PR type

What is the purpose of this PR?

• Bug fix
• Feature

What is the current behavior?

1. If the window height exceeds the current screen height, it will be truncated.
2. The application will always launch in the center of the screen upon every start.

What is the new behavior?

1. Adapt to changes in screen height.
2. Remeber the last position.

PR checklist

Please check that your PR meets the following requirements:

• App successfully launched
• File headers have been added to all source files
• NOT Contains breaking updates

Remark

Added information regarding the issue of temporary messages not being cleared when canceling message generation.