feat(audio): implement 3D virtual surround sound and audio filters

[adityaonx]

Hi @FengZeng, here is the dedicated PR for the 3D Virtual Surround Sound & Audio Filters feature.

Summary of Changes

• Virtual 3D Audio & DSP Filters: Implemented an MPV audio filter pipeline (af) combining:
  • Dynamic Loudness Leveling (dynaudnorm) for consistent volume without clipping.
  • Stereo Widening / Surround Depth (extrastereo) tuned for expansive soundstage without phase cancellation.
  • Room Ambience & Reverb (aecho) for spatial presence on headphones and stereo speakers.
  • Bass Boost & Treble Clarity (bass, treble) for enhanced low-end and vocal clarity.
• Audio Presets: Added presets (Movies, Music, Gaming, Custom) with tuned parameters.
• Player Controls & Settings Integration:
  • Added a dedicated 3D Audio button and popup menu in the bottom playback control bar.
  • Added a Virtual Surround Sound card under the Audio tab in the Settings panel (both UI locations are fully synchronized).
• Global & Per-Media Persistence: Added a Global toggle to apply audio filter settings across all media and persist state in state.json via Tauri across app restarts.

Verification

• Tested real-time audio filter changes across stereo headphones and speakers.
• Verified smooth filter application without audio stutter or lag.
• Verified state persistence across media switches and application restarts.
• Passed cargo check and vite build with 0 errors.