Bump Vite 8, matrix-js-sdk, and related deps; fix immer/vanilla-extract imports for new majors. Replace blocking sync error dialog with background recovery on wake/offline, and disable Vite auto-open in dev. Add feature handoff documentation index.
- Added `useViewTransitions` hook to enable view transitions in the app.
- Created `useNavigateWithTransition` for navigation with transitions.
- Integrated view transitions in `ClientRoot`, `HomeTab`, `InboxTab`, and `SettingsTab`.
- Introduced `AnimatedOutlet` and `RouteTransition` components for route-based animations.
- Enhanced CSS for transitions and added a new `twilightTheme`.
- Updated Vite configuration to serve sound and font assets.
- Added support for reaction notifications in the room utility.
- Created `DirectList` and related components for direct messaging functionality.
