- Extract shared modal-focus-guard module reused by changelog and session-help modals
- Only fold the selected changelog entry on Enter/Space; leave close/refresh buttons and nested folds to their own activation
- Stop re-stealing focus after a mouse click already selected an entry
- Parse prerelease and build metadata separately in version headings (e.g. 0.15.0-rc.1+build.2)
- Resolve tray menu test assertions by label instead of index
- Add a changelog modal opened from tray "View Changelog" or the update notification's "What's New" button; renders in-player or in its own window like the help modal
- Fetch changelog from the newest published release so newer-than-installed notes are visible, falling back to the bundled CHANGELOG.md on failure
- Group versions by minor line (current expanded, older folded), badge the installed version, tag newer ones "New"
- Support J/K/arrow navigation, Enter to fold/unfold, R to refetch, Esc to close
- Add changelog parsing/semver-compare utils and changelog IPC channel/runtime; bundle CHANGELOG.md into packaged builds
- Replace release/release-notes.md with changes/changelog-modal.md changeset entry