Refactor imports and types for consistency and remove redundant paths

- Updated relative imports by replacing `@/` aliases with proper `../` paths for consistency.
- Refined type definitions in IPC handlers and repositories (`User`, `Chapter`, `Act`, etc.).
- Simplified return types in `Location` model methods for streamlined usage.

electron/ipc/chapter.ipc.ts

@@ -1,7 +1,8 @@
 import { ipcMain } from 'electron';
 import { createHandler } from '../database/LocalSystem.js';
 import Chapter from '../database/models/Chapter.js';
-import type { ChapterProps, CompanionContent, ActStory } from '../database/models/Chapter.js';
+import type { ChapterProps, CompanionContent } from '../database/models/Chapter.js';
+import type { ActStory } from '../database/models/Act.js';
 
 interface GetWholeChapterData {
     id: string;