Feat: Add inline price editing for products in catalog

Implemented inline editing functionality for product prices directly in the catalog view with support for both regular and sale prices.

Features:
- Click-to-edit price fields with visual hover indicators
- Separate editing for price and sale_price fields
- Add/remove sale price with validation
- Real-time UI updates without page reload
- Permission-based access control
- Server-side validation for price constraints

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

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

myproject/products/urls.py

@@ -49,6 +49,7 @@ urlpatterns = [
     path('api/tags/<int:pk>/toggle/', api_views.toggle_tag_status_api, name='api-tag-toggle'),
     path('api/categories/create/', api_views.create_category_api, name='api-category-create'),
     path('api/categories/<int:pk>/rename/', api_views.rename_category_api, name='api-category-rename'),
+    path('api/products/<int:pk>/update-price/', api_views.update_product_price_api, name='api-update-product-price'),
 
     # Photo processing status API (for AJAX polling)
     path('api/photos/status/<str:task_id>/', photo_status_api.photo_processing_status, name='api-photo-status'),