Unread notifications (isNew=true) now show a secondaryContainer background,
bold title, and primary-colored icon per Material 3 guidelines. State changes
via mark-as-read/unread update the item's styling immediately in the All filter
view using mapItems with a copyWith, ensuring PagingStateBase's deep equality
check detects the change and triggers a rebuild.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a "Mark as unread" option to the notification popup menu (shown only
for already-read items) and a swipe-right gesture, mirroring the existing
"Mark as read" actions. Swipe/menu actions respect the active filter:
items are removed from the list only when filtered to New or Old, and
snap back when viewing All.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Users can now mark a notification as read via a popup menu on each list
item or by swiping left. Both actions call the backend API, remove the
item from the list, and show a snackbar confirmation. Swiping an already
read notification shows an error snackbar and bounces the item back.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
