# Bug: Trello cards not showing on all boards

## Status
Open

## Symptoms
- Only one board shows cards
- Other boards with cards appear empty
- Refresh works (no 403 error) but doesn't fix the issue
- No errors in server logs

## Investigation Notes
- CSRF fix applied - refresh now works
- API client code looks correct (fetches all boards, then cards per board)
- Cache logic appears correct (SaveBoards clears and replaces all data)
- Need to investigate:
  - Is the Trello API returning all cards?
  - Is there a filter issue (`visible` vs `all`)?
  - Board permissions issue on Trello side?
  - Race condition in concurrent card fetching?

## Reproduction
1. Login to dashboard
2. Go to Planning tab
3. Observe: only one board has cards, others are empty
4. Compare with actual Trello - should have cards on multiple boards

## Next Steps
- Add logging to trace Trello API responses
- Check if specific boards are returning empty card arrays
- Verify Trello API credentials have access to all boards