Migrate from window.electron to tauri IPC functions across components

- Replaced `window.electron.invoke` calls with equivalent `tauri` function calls for all IPC interactions.
- Removed `electron.d.ts` TypeScript definitions as they are no longer needed.
- Updated related logic for offline/online state synchronization.
- Added `types.rs` and `shared/mod.rs` modules to support Tauri IPC integration with Rust enums and shared logic.
- Refactored IPC request queues to use updated handler names for consistency with Tauri.

components/book/settings/ExportSetting.tsx

@@ -1,4 +1,5 @@
 'use client'
+import * as tauri from '@/lib/tauri';
 import React, {useCallback, useContext, useEffect, useState} from 'react';
 import {useTranslations} from 'next-intl';
 import {BookContext} from '@/context/BookContext';
@@ -33,10 +34,7 @@ export default function ExportSetting(): React.JSX.Element {
         if (!book) return;
         setIsLoading(true);
         try {
-            const chaptersInfo: ChapterExportInfo[] = await window.electron.invoke<ChapterExportInfo[]>(
-                'db:book:export:info',
-                {bookId: book.bookId}
-            );
+            const chaptersInfo: ChapterExportInfo[] = await tauri.getBookExportInfo(book.bookId) as ChapterExportInfo[];
             setChapters(chaptersInfo);
             const initialSelections: ChapterExportSelection[] = chaptersInfo.map(
                 (ch: ChapterExportInfo): ChapterExportSelection => ({
@@ -92,7 +90,7 @@ export default function ExportSetting(): React.JSX.Element {
                 .filter((s: ChapterExportSelection): boolean => s.selected)
                 .map((s: ChapterExportSelection) => ({chapterId: s.chapterId, version: s.version}));
 
-            const result: boolean = await window.electron.invoke<boolean>('db:book:export', {
+            const result: boolean = await tauri.exportBook({
                 bookId: book.bookId,
                 format,
                 selections: selectedChapters.length === chapters.length ? null : selectedChapters