test 0.6.6

Show the app version from the assembly everywhere

The version was hardcoded as "WinNotch v0.6.2" in the settings UI (and as
"0.6.2" in the plugin User-Agent and the plugin compatibility check), so a
release left those reading the old number.

Add AppInfo as the single source of truth, reading the version from the
assembly at runtime, and use it for the settings version label, the plugin
User-Agent, the compatibility check, and UpdateService.CurrentVersion. The
release workflow already stamps the assembly version from the git tag, so
every version shown in the app now updates automatically on release with no
hardcoded strings to maintain.

https://claude.ai/code/session_01HFZQYNPRR8BcF4wxdi9xXm