BrightWheel: eldre versjoner og versjonshistorikk

Update notifications and application identity
- Removed the standalone Checking for updates and already running notifications. An active check appears as a disabled Checking for updates... item when the tray menu is opened; manual checks notify only their final result. Automatic checks remain quiet.
- Added the Windows application description BrightWheel, so notifications can identify the app without the .exe filename suffix.
- Application and notification icons now use the full-brightness bulb with five surrounding dots. The tray brightness indicator keeps its dynamic colors and dot count using a separate bulb resource.
Old notifications retained by Windows are not rewritten or removed by this update; dismiss an existing progress notification once.

Upgrade
On 0.1.8, the next normal launch checks automatically if Check for updates automatically is enabled. You can also use Check for updates now. On 0.1.7, use that manual command once. From 0.1.6 or earlier, exit the app once and replace the executable. Standard cargo install --force still requires running EXEs to be closed.
Download brightwheel.exe, the optional bright.exe CLI, or the ZIP containing both. Verify downloads against SHA256SUMS.txt. Version 0.1.9 is also published on crates.io.

Verified release
- Release workflow passed: Windows build, formatting, Clippy, 36 tests, package validation, compiled application identity checks, GitHub assets, and crates.io publication.
- Main CI and post-publication E2E passed, including startup preferences, automatic process exit, replacement with the published v0.1.9 EXEs, restart, no-op behavior, and locked-CLI rollback.
- Independent downloads match GitHub asset digests and SHA256SUMS.txt; the ZIP contains byte-identical EXEs.
- The downloaded tray EXE contains FileDescription=BrightWheel, version 0.1.9, and all five amber dots in its application icon. Both embedded icon groups match the tagged source assets.
- The crates.io checksum matches its API and registry index. All 28 packaged source files match the release commit, allowing Windows line endings. Trusted publishing records the same commit and Release run.
Source commit: 38eb75bed7d0cf20246343823a7d45b8155bb2cc (PR #8), tagged v0.1.9.