Luminous v0.50.0

Luminous v0.50.0 is a minor feature and stability update:

🌟 New Features

• File & Playlist Opening: Directly open supported audio files and M3U playlists using the new folder button in the search bar.
• Collapsible Sidebar: Implemented collapsible and snappable sidebar with a compact icon-only state for a cleaner layout.
• Improved Collection Sorting: Added header-based column sorting (including track numbers) and restored filter pills to all sub-tabs.
• Virtualized Tracks List: Enhanced CollectionView performance on large libraries via Svelte track list virtualization.

⚙️ Performance Benchmarks & Testing

• 100k Tracks Suite: Scaled the performance benchmark suite to support 100k tracks to stress-test collection rendering, and added Vitest timeout parameters.

🐛 Compatibility & Bug Fixes

• Linux WebKitGTK 2D Fallback: Fixed rendering issues and pointer event bugs on Linux by falling back to 2D fade transitions.
• Artist Fallback: Resolved issues displaying "Various Artists" when multiple tracks shared the same artist metadata.
• Icon Tweaks: Refined the application icon and brand logo SVG viewBox to align better with taskbar proportions.