[Build] refactor(phase-0): modularize screens & services - activity log, profile, customer, receipt

# Merapikan Fondasi POS: Dari Semrawut ke Siap Tempur! 🚀 Aku baru --- ### Raw Commit Data ## GitHub Update **Repository:** [MKWcorp/POS-DRW-Skincare](https://github.com/MKWcorp/POS-DRW-Skincare) **Author:** multimediadrw **Date:** 4/27/2026, 5:38:22 PM **Commit:** [`bd60dfb`](https://github.com/MKWcorp/POS-DRW-Skincare/commit/bd60dfb9fcc4e75904eff2cb46ea282519185d88) ### Commit Message refactor(phase-0): modularize screens & services - activity log, profile, customer, receipt Screen refactors: - activity_log_viewer: extract provider + widgets (169→78 lines) - profile: extract auth provider + menu/section widgets (450+→75 lines) - customer_detail: extract header widget + reusable delegate - receipt: extract data provider Service refactors: - activity_log_applier: restore clean coordinator implementation - Remove dummy data references from customer providers Hardening: - Fix 7 regressions (AsyncValue namespace, SliverTabBarDelegate, imports) - Focused analyze passed: No issues found Files: 13 new, 24 modified, 1 deleted Impact: Reduced screen complexity, improved maintainability Documentation: CHANGELOG.md, COMMIT_NOTES_PHASE0_BATCH.md, SMOKE_TEST_PHASE0.md --- _This story was imported from historical commits._