* Replace persistent update banner with passive dot indicator in Options menu (#790)
The floating update banner that appeared every session is removed. Update
availability is now surfaced as a small dot on the Options button that
auto-dismisses (cookie-persisted per version) when the menu is opened.
The version section inside the menu shows install command and release
notes when an update exists.
* fix: restore ActionMenuSectionLabel import in both header menus
* Add TextShimmer to update notice and simplify menu version section
- Add reusable TextShimmer component (motion-primitives adaptation)
- Add reusable BorderTrail component for future use
- Shimmer "New update available!" text in the Options menu
- Simplify button to plain text link in emerald
- Remove Project repo link, make "Plannotator" header link to repo
Michael Ramos