- **Data & Preferences**:
    - Introduce `CollagePattern` enum with five distinct layout styles: Cosmic Swirl, Honeycomb Groove, Vinyl Stack, Pixel Mosaic, and Stardust Scatter.
    - Add `collage_pattern` and `collage_auto_rotate` keys to `UserPreferencesRepository` with associated flows and update methods.
- **UI & Components**:
    - Implement `buildCollageConfigs` to generate shape, size, and alignment configurations for each `CollagePattern`.
    - Update `AlbumArtCollage` to accept a `pattern` parameter and dynamically render the selected layout.
    - Add "Home Collage" section to Settings, allowing users to select a specific pattern or enable "Auto-Rotate" to cycle through patterns on each visit.
- **ViewModel & Integration**:
    - Update `SettingsViewModel` to manage collage pattern and rotation state.
    - Enhance `HomeScreen` to handle pattern selection logic, respecting the auto-rotation preference using `rememberSaveable`.