[Build] Refactor: extract SyncPullStockSection UI blocks into reusable components

# Mengurai Benang Kusut UI: Refactor Modul Sinkronisasi Stok DRW Aku baru saja menyelesaikan --- ### Raw Commit Data ## GitHub Update **Repository:** [MKWcorp/POS-DRW-Skincare](https://github.com/MKWcorp/POS-DRW-Skincare) **Author:** multimediadrw **Date:** 5/8/2026, 9:29:00 PM **Commit:** [`c531dfc`](https://github.com/MKWcorp/POS-DRW-Skincare/commit/c531dfc080d4b6373346a0bc40b64aff028cb17a) ### Commit Message Refactor: extract SyncPullStockSection UI blocks into reusable components - Move header/description/scope/warning/action buttons/loading dialog to components - Reduce sync_pull_stock_section.dart from 447 to 232 lines - Keep sync flow + provider logic unchanged - Analyze clean on touched files --- _This story was imported from historical commits._