Template
## Summary - Closes #7 - Portal Retail **Sales** page: 30-day orders/revenue/units/AOV, daily charts, top products - Home dashboard cards for 30-day shop sales and revenue when `FEATURE_SHOP` is on - Stacks on #6 (shop catalog). Merge that first, then retarget `master` if needed. ## Test plan - [ ] Sales page requires login; empty state with no paid orders - [ ] Paid/fulfilled in the last 30 days counted; draft/open/cancelled/old excluded - [ ] Top products ranked by units; home dashboard shows 30-day sales count - [ ] `manage.py test shop core.tests_features` Reviewed-on: #8