feat: add frontend support for folder uploads and received files review

Commit notes

- Update upload page with single file and folder upload modes - Add batch upload support with progress tracking - Create enhanced received files page with review UI - Add accept/reject actions for individual files and batches - Support creating packs from folder uploads - Add query hooks for pending files and review mutations - Update API client with new endpoint functions

Co-authored-by: armin.naimi <[email redacted]>