- Simplified `run_dev_queries` by delegating schema updates to `run_migrations` for consistency.
- Added universal `fetch_all_*_by_book` methods for streamlined data retrieval across repositories.
- Replaced nested query logic with batch fetching to improve performance and maintainability.
- Optimized HTML-to-text conversion by consolidating regex patterns with `LazyLock`.
- Replaced `window.electron.invoke` calls with equivalent `tauri` function calls for all IPC interactions.
- Removed `electron.d.ts` TypeScript definitions as they are no longer needed.
- Updated related logic for offline/online state synchronization.
- Added `types.rs` and `shared/mod.rs` modules to support Tauri IPC integration with Rust enums and shared logic.
- Refactored IPC request queues to use updated handler names for consistency with Tauri.
