- New CapacityTest model (battery_id FK CASCADE, mah, date, notes)
- DB migration: create capacity_test table, migrate existing single-test data
- Two new routes: add and delete capacity test records
- Battery.tested_capacity_mah/tested_date kept in sync with latest test
so dashboard display requires no changes
- Battery detail: Capacity History card with sortable table, health %
per reading, and a canvas line chart (shown when >= 2 records)
- Chart uses CSS variables for colors — works in light and dark mode
- Remove tested_capacity_mah/tested_date from Edit Details form
- 3 new acceptance tests (48 total)
iterminate
2f8a8a2b77