## Bug
Clicking the maximize control in the custom title bar makes the main window disappear/hide instead of filling the screen. Restore is then hard or impossible.
## Where
`MainWindow` uses custom client-area chrome, so the OS does not manage maximize:
- `src/ClaudeDo.Ui/Views/MainWindow.axaml:14-16` — `WindowDecorations="BorderOnly"`, `ExtendClientAreaToDecorationsHint="True"`, `ExtendClientAr
ClaudeDo-Task: 7d3d9501a8eb4111b9d433fd917f5a22