Refactor and extend offline synchronization logic across components and services

- Integrated sync queue mechanisms with `LocalSyncQueueContext` for offline data handling.
- Updated key sync-related services (e.g., book, chapter, series) to support offline-first functionality.
- Removed redundant database fetch methods to optimize repository logic and improve maintainability.
- Enhanced Tauri IPC usage for sync operations and removed legacy methods in Rust services.

components/series/settings/SeriesBooksManager.tsx

@@ -29,7 +29,8 @@ function SeriesBooksManager(props: object, ref: React.Ref<{ handleSave: () => Pr
     const {seriesId}: SeriesContextProps = useContext<SeriesContextProps>(SeriesContext);
     const {
         serverSyncedBooks,
-        setServerSyncedBooks
+        setServerSyncedBooks,
+        localSyncedBooks
     }: BooksSyncContextProps = useContext<BooksSyncContextProps>(BooksSyncContext);
     const userToken: string = session?.accessToken ? session?.accessToken : '';
     const {errorMessage, successMessage}: AlertContextProps = useContext<AlertContextProps>(AlertContext);
@@ -49,11 +50,12 @@ function SeriesBooksManager(props: object, ref: React.Ref<{ handleSave: () => Pr
     
     useEffect(function () {
         const booksInSeries: string[] = seriesBooks.map((book: SeriesBookProps) => book.bookId);
-        const filteredBooks: SyncedBook[] = serverSyncedBooks.filter(
+        const allBooks: SyncedBook[] = useLocal ? localSyncedBooks : serverSyncedBooks;
+        const filteredBooks: SyncedBook[] = allBooks.filter(
             (book: SyncedBook) => !booksInSeries.includes(book.id)
         );
         setAvailableBooks(filteredBooks);
-    }, [seriesBooks, serverSyncedBooks]);
+    }, [seriesBooks, serverSyncedBooks, localSyncedBooks, useLocal]);
     
     async function loadSeriesBooks(): Promise<void> {
         setIsLoading(true);
@@ -97,7 +99,8 @@ function SeriesBooksManager(props: object, ref: React.Ref<{ handleSave: () => Pr
                 : await apiPost<boolean>('series/book/add', {seriesId: seriesId, bookId: selectedBookToAdd}, userToken, lang);
             
             if (response) {
-                const addedBook: SyncedBook | undefined = serverSyncedBooks.find(
+                const allBooks: SyncedBook[] = useLocal ? localSyncedBooks : serverSyncedBooks;
+                const addedBook: SyncedBook | undefined = allBooks.find(
                     (book: SyncedBook) => book.id === selectedBookToAdd
                 );
                 if (addedBook) {