Add offline mode support with PIN configuration and management

- 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.

package.json

@@ -48,9 +48,11 @@
     "@tiptap/extension-underline": "^3.10.7",
     "@tiptap/react": "^3.10.7",
     "@tiptap/starter-kit": "^3.10.7",
+    "@types/bcrypt": "^6.0.0",
     "antd": "^5.28.1",
     "autoprefixer": "^10.4.22",
     "axios": "^1.13.2",
+    "bcrypt": "^6.0.0",
     "i18next": "^25.6.2",
     "js-cookie": "^3.0.5",
     "next": "^16.0.3",