feat: Revamp EPUB import process with batch upload support and enhanced API integration

- Introduced a new batch import client for handling multiple EPUB files simultaneously.
- Updated API routes for previewing and importing EPUB files, improving error handling and response management.
- Enhanced genre management during import, allowing for dynamic creation and association of genres.
- Implemented long-fetch handling to accommodate lengthy processing times for large EPUB files.
- Refined UI components for better user experience in the import workflow.

FEATURES.md

@@ -28,7 +28,7 @@ Trang thai tinh nang cho web app `reader`.
 | Feature | Status | Notes |
 |---|---|---|
 | MOD dashboard/workflows | partial | Mot phan route mod da co, tiep tuc bo sung |
-| EPUB import wizard (4 step) | done | `/mod/import` + `/api/import/*` review-first flow |
+| EPUB import wizard | done | `/mod/import`: `/api/mod/the-loai`, `POST /api/import/uploads/preview`, `/api/mod/epub`, `/api/mod/epub/ai-suggest` |
 
 ## Dependencies