* feat: implement playlist download feature with UI components, enhance download service for playlist handling, and update translations for playlist-related terms
* refactor: replace console logs with log.info for auto-updater events and enhance zh-TW translations with new keys and updates
- Add "hideDockIcon" setting label and description to English locale,
enabling users to remove VidBee from the macOS Dock and rely on the
menu bar/tray icon.
- Apply dock visibility changes when settings change, when settings
are loaded, and after settings are reset by calling
applyDockVisibility from the settings service.
- Update About page to use about.description for share text and display
content, replacing the removed tagline key usage.
- Remove unused "tagline" entries from multiple locale files (en, fr,
it, pt, ja, zh) to keep translations in sync with UI text changes.
These changes add OS integration for hiding the dock icon and ensure UI
copy is consistent and correctly internationalized.
