- **Duration & Playback Logic**:
    - Introduces `resolveEffectiveDuration` in `PlaybackStateHolder` to reconcile player-reported duration with song metadata, preventing progress UI jumps during track transitions or remote sessions.
    - Implements a mismatch tolerance (1500ms) to prefer metadata hints unless the current position exceeds them.
    - Adds media ID validation in local progress updates to prevent UI updates for the wrong track during engine swaps.
- **Equalizer & Audio Controls**:
    - Refactors `EqualizerViewModel` to update UI state immediately for better responsiveness while debouncing persistence to `userPreferencesRepository`.
    - Implements proper state management for Bass Boost, Virtualizer, and Loudness Enhancer with value clamping and debounced storage.
    - Updates `VerticalStarSlider` and `WavyArcSlider` with improved gesture handling that correctly disallows parent touch interception during interaction.
- **Player UI & Components**:
    - Replaces manual gesture detection in `WavySliderExpressive` with a standard `Slider` overlay to handle interactions, while maintaining the `LinearWavyProgressIndicator` for visualization.
    - Adjusts `PlayerSeekBar` and `FullPlayerContent` padding to align progress tracks with the screen edges.
    - Updates `FullPlayerContent` to use the new duration reconciliation logic for displaying time labels and calculating progress fractions.
- **Visual Refinements**:
    - Smooths the "Pill Morph" animation for the seek bar thumb during user interaction.
    - Ensures consistent track coloring and rotation logic for equalizer sliders.