Centralises all SnackBar calls behind UISnackbars.showError/showSuccess/
showWarning/showInfo, each themed via AppColorExtension. New warning and
info colour tokens added to both themes. Calling any method clears any
visible snackbar before showing the new one.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add linter commands to CLAUDE.md
- Add clippy to Nix dev shell
- Add TODO.md with project task list
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>
