Bump app version to 0.5.0 and implement offline mode support across components

- Added offline detection logic with `OfflineContext` to improve app functionality in offline scenarios.
- Integrated Tauri IPC functions to handle local tool settings and character attributes when offline.
- Refined indentation logic in `TextEditor` for better compatibility with WebKit engines.
- Removed unused `indent` property and related settings in editor components to simplify configuration.
- Updated locale files with improved translation consistency and parameterized placeholders.

hooks/useSyncBooks.ts

@@ -1,5 +1,5 @@
 import {useContext} from 'react';
-import {apiGet, apiPost} from '@/lib/api/client';
+import {apiGet, apiPatch, apiPost} from '@/lib/api/client';
 import {SessionContext} from '@/context/SessionContext';
 import {LangContext} from '@/context/LangContext';
 import {AlertContext} from '@/context/AlertContext';