Fix the issue where groups would collapse but immediately reopen on next refresh:
Problem:
- Groups collapsed correctly but reopened after 1 second due to auto-refresh
- The toggleGroup function used classList.contains('collapsed') to check state
- But displayDownloads() regenerated HTML every second, losing the collapsed state
Solution:
- Add collapsedGroups Set to store which group IDs are collapsed
- Check collapsedGroups.has(groupId) instead of DOM class
- Save state in memory when toggling (add/delete from Set)
- Apply collapsed state when generating HTML (inline styles and CSS class)
- Groups now stay collapsed across auto-refresh cycles
The collapsed state persists:
- Across auto-refresh (every second)
- When filters change (commented out optional reset)
- Until user manually expands the group again
root
a32ea205a4