Java debug preparation ran before a session existed, so the toolbar and console stayed idle until jdtls had finished, and background console output waited for an animation frame.
- Create the Debug session as soon as the action starts, with progress in its console and a Stop that cancels preparation.
- Share launch preparation between Run and Debug, and move JDK and Lombok detection off the async runtime.
- Flush background console output on a timer as well as on animation frames, so a hidden window still receives it.
- Log how long each launch phase takes.
Refs #530
l0ng-ai
7610fc3f80