FileSaver fails in Capacitor WebView, so save via MediaStore; clear tray notifications when sync reports rooms as read on another device, and improve collapsed notification avatars with conversation shortcuts.
- Implemented ShareRoomPicker component to allow users to pick a room for sharing content received from Android intents.
- Integrated search functionality to filter rooms and directs.
- Added virtualized list for efficient rendering of room options.
- Created utility functions for handling Android share payloads, including fetching and clearing pending shares.
Co-authored-by: Copilot <copilot@github.com>
