- Introduced `Subcategory` model with migration and unique slug constraint per category
- Enabled subcategory assignment for items with validation to ensure category matching
- Updated catalog views to handle subcategories, filtering items accordingly
- Enhanced templates (`index.html`, `side-bar.html`, `item-list.html`, `detail.html`) to display subcategories
- Added dynamic subcategory dropdown in Django admin with category filtering
- Created JavaScript for admin subcategory handling and AJAX population
- Wrote comprehensive tests for subcategory functionality in views and admin
- Added `ItemImage` model with migration for image handling and metadata
- Implemented product gallery in `detail.html` with thumbnails for additional images
- Updated `Item` model to include `primary_image` property for gallery logic
- Enhanced `catalog/index.html` to support item thumbnails
- Updated `catalog.css` for responsive gallery and item list styling
- Extended catalog views to prefetch images for efficient queries
- Added comprehensive tests for catalog and detail views
- Configured Django to serve media files in development
- Updated admin with inline support for managing `ItemImage` entities
