docs: Update CHANGELOG with Apple Music-style sliders

Author: dddevid

CHANGELOG.md

@@ -58,6 +58,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Fixed ReorderableListView null crash with drag handle
   - Fixed syntax error causing build failure in `_buildRadioPlayer`
   - Status-bar icons now forced to white on dark background so they remain visible
+- **Apple Music-Style Sliders** — Progress and volume bars redesigned with Apple Music aesthetics
+  - Invisible thumb on mobile that grows to 28px with smooth animation when dragged
+  - Track height animates from 3px to 5px during interaction with white glow effect
+  - Desktop: thinner 3px tracks, smaller 5px thumbs, darker inactive track (#3A3A3A)
+  - All transitions use 150ms easeOut curves for fluid micro-interactions
 - **Android Audio Focus** — Playback now requests audio focus before starting, resolving no-sound issues on Android car head units and during remote playback
 - **Android Playback Fix** — Resolved conflict between custom `AndroidSystemPlugin` and `audio_session` plugin that caused songs to start then immediately pause on Android devices
 - **Windows Progress Bar** — Added fallback position polling timer for Windows desktop where `just_audio_windows` position stream does not emit reliably; progress bar and SMTC now update correctly during playback