- **Feature: Custom Artist Images**
    - Users can now set a custom image for any artist from the Artist Detail screen.
    - An "Edit" button on the artist header opens a menu to "Change photo" (via system photo picker) or "Reset to default".
    - Selected images are copied to internal app storage to ensure persistence and compressed as JPEGs to save space.
- **Database & Data Layer**:
    - The `artists` table is updated with a `custom_image_uri` column via a new database migration (v22 to v23).
    - `MusicDao` includes new methods (`updateArtistCustomImage`, `getArtistCustomImage`) and updates existing queries to select the new field.
    - `ArtistImageRepository` is expanded with logic to set, clear, and resolve the effective artist image, prioritizing the user's custom image over the one from the Deezer API.
- **UI & Theming**:
    - The `ArtistDetailScreen` now uses a `MaterialTheme` whose color scheme is dynamically generated from the artist's image.
    - The `ArtistDetailViewModel` pre-warms this color palette before the UI loads to prevent a flash of default colors.
    - The UI state now tracks `effectiveImageUrl` (custom or remote) to ensure the correct image is always displayed.
    - The view model and repository now handle the full lifecycle of setting/clearing custom images and regenerating the theme palette accordingly.