Add offline mode logic for main chapters and refine IPC handlers

- Integrate `OfflineContext` into `MainChapter` and related components to handle offline scenarios for chapter operations.
- Add conditional logic to toggle between server API requests and offline IPC handlers (`db:chapter:add`, `db:chapter:remove`).
- Extend `GET /book/story` endpoint to include `mainChapter` data.
- Refactor IPC handlers for chapters to accept structured data arguments with stricter typings.
- Update frontend key assignments for `BookList` component for improved rendering stability.

electron/ipc/book.ipc.ts

@@ -2,6 +2,7 @@ import { ipcMain } from 'electron';
 import { createHandler } from '../database/LocalSystem.js';
 import Book from '../database/models/Book.js';
 import type { BookProps, GuideLine, GuideLineAI, Act, Issue, WorldProps } from '../database/models/Book.js';
+import Chapter from '../database/models/Chapter.js';
 import type { ChapterProps } from '../database/models/Chapter.js';
 
 interface UpdateBookBasicData {
@@ -30,6 +31,7 @@ interface UpdateGuideLineData {
 interface StoryData {
     acts: Act[];
     issues: Issue[];
+    mainChapter: ChapterProps[];
 }
 
 interface UpdateStoryData {
@@ -144,7 +146,7 @@ ipcMain.handle('db:book:guideline:update', createHandler<UpdateGuideLineData, bo
     )
 );
 
-// GET /book/story - Get story data (acts + issues)
+// GET /book/story - Get story data (acts + issues + mainChapter)
 interface GetStoryData {
     bookid: string;
 }
@@ -152,9 +154,11 @@ ipcMain.handle('db:book:story:get', createHandler<GetStoryData, StoryData>(
         async function(userId: string, data: GetStoryData, lang: 'fr' | 'en'):Promise<StoryData> {
             const acts:Act[] = await Book.getActsData(userId, data.bookid, lang);
             const issues:Issue[] = await Book.getIssuesFromBook(userId, data.bookid, lang);
+            const mainChapter:ChapterProps[] = Chapter.getAllChaptersFromABook(userId, data.bookid, lang);
             return {
                 acts,
-                issues
+                issues,
+                mainChapter
             };
         }
     )

electron/ipc/chapter.ipc.ts

@@ -115,10 +115,13 @@ ipcMain.handle('db:chapter:add', createHandler<AddChapterData, string>(
 );
 
 // DELETE /chapter/remove - Remove chapter
-ipcMain.handle('db:chapter:remove', createHandler<string, boolean>(
-        function(userId: string, chapterId: string, lang: 'fr' | 'en'): boolean {
-            console.log(userId,chapterId,lang)
-            return Chapter.removeChapter(userId, chapterId, lang);
+interface RemoveChapterData {
+    chapterId: string;
+    bookId?: string;
+}
+ipcMain.handle('db:chapter:remove', createHandler<RemoveChapterData, boolean>(
+        function(userId: string, data: RemoveChapterData, lang: 'fr' | 'en'): boolean {
+            return Chapter.removeChapter(userId, data.chapterId, lang);
         }
     )
 );