Refactor IPC handlers to enforce consistent return types and enhance type definitions

- Update return types for IPC handlers in `character.ipc.ts`, `chapter.ipc.ts`, and `location.ipc.ts` for stricter type safety.
- Introduce new type definitions for better structure and clarity.
- Remove redundant console logs and unnecessary comments for cleaner code.

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 type { ChapterProps } from '../database/models/Chapter.js';
 
 interface UpdateBookBasicData {
     title: string;
@@ -34,7 +35,7 @@ interface StoryData {
 interface UpdateStoryData {
     bookId: string;
     acts: Act[];
-    mainChapters: any[]; // ChapterProps[] from your API
+    mainChapters: ChapterProps[];
 }
 
 interface CreateBookData {