Windows startup fix
- Fixed a Windows startup issue where the application could reopen outside the visible screen area after previously being minimized.
- Saved off-screen window positions are now rejected and replaced with a safe visible position.
- Release publishing is now separated from ordinary tag/build execution.
- v0.5.4 remains known-bad on Windows and should be replaced by v0.5.5.
Full Changelog: v0.5.4...v0.5.5