The get-selected-text function doesn't work when called for the first time

## demo

https://github.com/Mia-Zhang-Forever/enigo_demo/tree/get-text

* use the `get-text` branch
* run it with: `pnpm tauri dev`

it will open a board, you can type in text in the board and use a shortcut to trigger the selection:
the shortcut is hardcoded: `ctrl+cmd+,`

When "get-selected-text" is called for the first time, it cannot retrieve the content.