Introduces LocalMusicPage and LocalPlaylistPage for browsing and playing local music files. Refactors LocalDirMeta to a record, adds local file path support to Music entities, and updates MediaPlayerService to handle local file playback. MainWindowViewModel and navigation logic are updated to integrate local music features, and UI components are added for local playlist management.

Updater now includes a release page URL in its config and displays a GitHub link in the update window. The installer logic verifies the downloaded package size before extraction and launching, showing an error if the update fails. Added directory removal for local music folders, improved lyric animation easing, updated dark theme color, and bumped app version to 1.0.2. README and UI elements were refined for clarity and usability.