Update database schema and synchronization logic

- Add `useEffect` in `ScribeLeftBar` for handling book state changes.
- Extend `BooksSyncContext` with new properties and stricter typings.
- Refine `Repositories` to include `lastUpdate` handling for synchronization processes.
- Add comprehensive `fetchComplete*` repository methods for retrieving entity-specific sync data.
- Enhance offline logic for chapters, characters, locations, and world synchronization.
- Improve error handling across IPC handlers and repositories.

lib/errors.ts

@@ -0,0 +1,14 @@
+/**
+ * Clean error messages from Electron IPC prefix
+ * Transforms: "Error invoking remote method 'channel': Error: Message"
+ * Into: "Message"
+ */
+export function cleanErrorMessage(error: unknown): string {
+    if (error instanceof Error) {
+        return error.message.replace(/^Error invoking remote method '[^']+': Error: /, '');
+    }
+    if (typeof error === 'string') {
+        return error.replace(/^Error invoking remote method '[^']+': Error: /, '');
+    }
+    return 'An unknown error occurred';
+}