- Added 'Completed Tasks' collapsible block with count badge
- Completed section collapsed by default (prevents scrolling)
- In-progress and planned tasks always visible at top
- Click completed section header to expand/collapse
- Improves navigation to active work
- Added expandedItems state to track which items are expanded
- Auto-expands only non-complete items on load (in-progress, planned)
- Complete items collapsed by default for better overview
- Click anywhere on item header or chevron to toggle
- Smooth transitions and hover effects
- Improves readability when many items are complete
