…ation

- **UI Components & Utilities**:
    - Implements `GenreIconProvider` to map genre IDs and keywords (e.g., "Rock", "Electronic", "Jazz") to specific vector drawables.
    - Provides a `DEFAULT_GENRES` list for common music categories.
    - Adds `GenreTypography` to generate deterministic, stylized `TextStyle` objects for genre labels.
    - Utilizes variable font settings (`R.font.genre_variable` and `R.font.gflex_variable`) to dynamically adjust font weight, width, slant, and geometric transforms based on genre ID hashes.
- **Resources**:
    - Adds support for complex typography strategies including Monospace, Roboto Flex "Wild" variations, and Google Sans Flex expressive styles.

- **Quick Fill Feature**:
    - Introduces `QuickFillScreen.kt` featuring a multi-step dialog to batch-assign genres to songs.
    - Implements a searchable song selection step followed by a genre validation step.
    - Adds a docked toolbar with "Select All" and "Clear" functionality for efficient song management.
- **Custom Genres**:
    - Adds support for user-defined genres with custom icons, persisted via `UserPreferencesRepository`.
    - Updates `GenreIconProvider` with a set of selectable vector icons and logic to handle custom genre-to-resource mappings.
    - Integrates custom genre display into `GenreCategoriesGrid` and `GenreDetailScreen`.
- **Data & Logic**:
    - Implements `batchEditGenre` in `PlayerViewModel` to update metadata for multiple songs simultaneously, including optimistic UI updates and MediaSession synchronization.
    - Extends `UserPreferencesRepository` to store custom genres and their icon mappings using DataStore.
- **UI/UX Improvements**:
    - Updates `GenreSortBottomSheet` to support optional header content.
    - Refines scrollbar padding in `SongPickerBottomSheet` for better alignment.
    - Adds new vector assets and font resources (`genre_variable.ttf`, `gflex_variable.ttf`) to support enhanced typography and iconography.

- **UI & Styling**:
    - Updates the artist name text style in `GenreDetailScreen` from `titleLarge` to `titleMedium` for better visual hierarchy within artist sections.

…id view, improved typography scaling, and persistent user preferences.

- **Genre Browsing & UI**:
    - Introduces a toggle button in `GenreCategoriesGrid` to switch between Grid (2 columns) and List (1 column) layouts.
    - Implements layout-specific styling, where the List view features fixed-height cards and 30% larger typography for better readability.
    - Refines the `GenreCard` layout with smart width distribution (65% for grid, 80% for list) to prevent text overlap with genre icons.
    - Adds smooth shape animations when toggling between the list and grid view modes.
- **Typography & Styling**:
    - Enhances `GenreTypography` with "smart scaling" that dynamically adjusts font size based on text length and word count to prevent overflow.
    - Expands variable font usage for `Roboto Flex`, utilizing additional axes like `grade`, `XTRA`, `YOPQ`, and `YTLC` for more expressive, unique genre labels.
    - Tames geometric transforms (scaleX) for long titles to ensure visual consistency across various genre names.
- **Preferences & Data**:
    - Adds `IS_GENRE_GRID_VIEW` to `UserPreferencesRepository` to persist the user's preferred genre layout across sessions.
    - Updates `PlayerViewModel` with a `toggleGenreViewMode` function and exposes the view state via `StateFlow`.
    - Standardizes `StateFlow` initialization in `PlayerViewModel` using `SharingStarted.WhileSubscribed` for better resource management.
- **Miscellaneous**:
    - Adjusts spacing and padding in `GenreCategoriesGrid` for a more balanced visual rhythm.
    - Updates `addCustomGenre` signature in the ViewModel to make `iconResId` optional.