Close [BS-3029](https://linear.app/affine-design/issue/BS-3029/frame-里面的-shape-没办法进入文本编辑模式)
Close [BS-3082](https://linear.app/affine-design/issue/BS-3082/按s切换至shape工具，在白板上点击会创建两个shape)
Close [BS-3091](https://linear.app/affine-design/issue/BS-3082/按s切换至shape工具，在白板上点击会创建两个shape)
## Fix Shape Tool Issues
This PR addresses several issues with the shape and mindmap tools functionality in the editor:
1. **Fix text editing after mode switching**: Resolves an issue where users couldn't edit text in shapes after switching editor modes. The fix ensures the edgeless block is properly retrieved when double-clicking on a shape.
2. **Improve tool switching behavior**: Fixes issues with tool overlays not showing or being repeated when switching between tools. This includes:
- Properly handling tool overlay visibility
- Ensuring only one tool is active at a time when using keyboard shortcuts
- Adding proper cleanup when switching tools
3. **Add comprehensive tests**: Adds new test cases to verify:
- Shape creation with keyboard shortcuts
- Shape text editing after mode switching
- Tool switching behavior with keyboard shortcuts
