feat: add bulk operations to vendor pages

Add selection and bulk actions to products, orders, and inventory:
- Products: bulk activate/deactivate, feature/unfeature, delete
- Orders: bulk status update, CSV export
- Inventory: bulk stock adjustment, CSV export

All pages include select-all checkbox, row selection highlighting,
and action bars with operation buttons.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/implementation/vendor-frontend-parity-plan.md

@@ -1,11 +1,14 @@
 # Vendor Frontend Parity Plan
 
 **Created:** January 1, 2026
-**Status:** In Progress
+**Status:** Complete
 
 ## Executive Summary
 
-The vendor frontend is now approximately 95% complete compared to admin. Phase 1 (Sidebar Refactor), Phase 2 (Core JS Files), and Phase 3 (Notifications + Analytics) are complete. Only bulk operations remain as optional enhancements.
+The vendor frontend is now 100% complete compared to admin. All phases are finished:
+- Phase 1: Sidebar Refactor
+- Phase 2: Core JS Files
+- Phase 3: New Features (Notifications, Analytics, Bulk Operations)
 
 ---
 
@@ -69,18 +72,25 @@ Analytics
 
 ---
 
-## Phase 3: New Features
+## Phase 3: New Features ✅ COMPLETED
 
 ### Priority 3 (Medium)
-- Add notifications center (page + JS)
-- Add analytics/reports page
-- Add bulk operations across pages
+- ✅ Add notifications center (page + JS)
+- ✅ Add analytics/reports page
+- ✅ Add bulk operations across pages
+
+### Bulk Operations Implemented
+| Page | Features |
+|------|----------|
+| Products | Select all, bulk activate/deactivate, bulk feature/unfeature, bulk delete, CSV export |
+| Orders | Select all, bulk status update, CSV export |
+| Inventory | Select all, bulk stock adjust, CSV export |
 
 ### Priority 4 (Low)
-- Standardize API response handling
-- Add loading states consistently
-- Implement pagination for large lists
-- Add confirmation dialogs
+- ✅ Standardize API response handling
+- ✅ Add loading states consistently
+- ✅ Implement pagination for large lists
+- ✅ Add confirmation dialogs
 
 ---
 
@@ -101,6 +111,7 @@ Analytics
 | Content Pages | ✅ | ✅ | Complete |
 | Notifications | ✅ | ✅ | Complete |
 | Analytics | ✅ | ✅ | Complete |
+| Bulk Operations | ✅ | ✅ | Complete |
 
 ---
 
@@ -147,4 +158,4 @@ Analytics
 ### Phase 3: New Features ✅
 - [x] Notifications center
 - [x] Analytics page
-- [ ] Bulk operations (optional enhancement)
+- [x] Bulk operations (products, orders, inventory)