Issue: After MUI v7 upgrade, Quick Actions and Today's Summary
cards were not evenly sized - they were content-sized instead.
Solution:
- Quick Actions: Added height: '100%' and flexbox layout to ensure
all cards are the same height within each row
- Today's Summary stats: Added minHeight: '120px' with flexbox to
ensure consistent card heights
Result: Both sections now have evenly spaced, consistent layouts
regardless of content length.