Add comprehensive E2E test for capacity calendar functionality:
- Login and navigate to capacity page
- Create test team member
- Select team member and wait for calendar
- Change availability from Full day to Half day
- Verify save completes without errors
- Verify change persists via API
Test Results:
- Backend: 76 passed ✅
- Frontend Unit: 10 passed ✅
- E2E: 132 passed, 24 skipped ✅
- New test: 2 passed (chromium + firefox) ✅
Refs: openspec/changes/headroom-foundation
Santhosh Janardhanan
0a9fdd248b