Refactor character, chapter, and story components to support offline mode

- Add `OfflineContext` and `BookContext` to components for offline state management.
- Introduce conditional logic to toggle between server API requests and offline IPC handlers for CRUD operations.
- Refine `TextEditor`, `DraftCompanion`, and other components to disable actions or features unavailable in offline mode.
- Improve error handling and user feedback in both online and offline scenarios.

app/page.tsx

@@ -475,7 +475,15 @@ function ScribeContent() {
                     }
                     response = await window.electron.invoke('db:chapter:last', currentBook?.bookId)
                 } else {
-                    response = await System.authGetQueryToServer<ChapterProps | null>(`chapter/last-chapter`, session.accessToken, locale, {bookid: currentBook?.bookId});
+                    if (currentBook?.localBook) {
+                        if (!offlineMode.isDatabaseInitialized) {
+                            setCurrentChapter(undefined);
+                            return;
+                        }
+                        response = await window.electron.invoke('db:chapter:last', currentBook?.bookId)
+                    } else {
+                        response = await System.authGetQueryToServer<ChapterProps | null>(`chapter/last-chapter`, session.accessToken, locale, {bookid: currentBook?.bookId});
+                    }
                 }
                 if (response) {
                     setCurrentChapter(response)