- Implement async_browse_media() to enable browsing media folders through HA Media Browser UI
- Add async_play_media() to handle file playback from media browser
- Add play_media_file service for automation support
- Add BROWSE_MEDIA and PLAY_MEDIA feature flags
- Implement media browser API client methods (get_media_folders, browse_folder, play_media_file)
- Fix path separator handling for cross-platform compatibility
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>