- Enhanced the `BookProps` struct with updated field mappings for better API compatibility.
- Improved offline/online sync workflows in `BookList` by adding `localBook` property handling and new item count methods for segmented tracking of local/online items.
- Updated click handlers in `BookList` to fetch data based on connectivity state and prioritize local data when offline.
- Refactored the decryption and vault handling logic in Rust to remove obsolete legacy methods and standardize debug behavior.
- Introduced `ScribeShell` layout component with foundational logic for book/chapter syncing and offline queue handling.
- Added `init_panic_hook` to improve crash reporting during Rust app initialization.
- Integrated sync queue mechanisms with `LocalSyncQueueContext` for offline data handling.
- Updated key sync-related services (e.g., book, chapter, series) to support offline-first functionality.
- Removed redundant database fetch methods to optimize repository logic and improve maintainability.
- Enhanced Tauri IPC usage for sync operations and removed legacy methods in Rust services.
- Replaced legacy vault key derivation with OS keyring-backed storage for improved security and platform integration.
- Introduced PIN rate limiting with configurable lockout durations to mitigate brute-force attacks.
- Enhanced tombstone services to use unified error-handling logic via `apply_tombstone`.
- Refactored logic for book and series data synchronization, fixing null checks and improving flow consistency.
- Added comprehensive error handling to all database and vault operations in key manager services.
- Introduced `DatabaseManager` for handling SQLite connections per user with WAL and foreign key support.
- Implemented `initialize_schema` to set up comprehensive database schema covering AI, books, characters, locations, series, and sync tracking.
- Added migration helpers for schema versioning and column updates.
- Structured database module into `connection.rs` and `schema.rs` for clearer organization.
