- Increment `SCHEMA_VERSION` to 2 in `schema.ts`.
- Remove all `meta_*` columns from database tables.
- Add migration logic to handle schema upgrades and clean up unused columns.
- Modify database models and repository methods to exclude `meta_*` fields for stricter typings and improved structure.
- Refactor and optimize query statements across repositories to align with new schema changes.
- Introduce `OfflinePinSetup` component for users to configure secure offline access.
- Add new `AIUsageContext` and extend `OfflineProvider` for offline-related state management.
- Implement offline login functionality in `electron/main.ts` with PIN verification and fallback support.
- Enhance IPC handlers to manage offline mode data, PIN setup, and synchronization.
- Update localization files (`en.json`, `fr.json`) with offline mode and PIN-related strings.
- Add `bcrypt` and `@types/bcrypt` dependencies for secure PIN hashing and validation.
- Refactor login and session management to handle offline mode scenarios with improved error handling and flow.