- Add get_usage_trend() and get_amount_trend() functions for day-over-day comparison
- Display trend arrows (up/down/flat) with percentage change in stat_today_usage and stat_today_amount
- Add colored left borders to all stat cards for visual distinction:
- Blue: usage, total users
- Purple: amount, total orgs
- Green: active users, new users this month
- Cyan: concurrent users
- Red: errors
- Enhance visual hierarchy with accent colors matching SVG icons
- Add get_active_users_today(), get_new_users_month(), get_total_orgs() to load_dashboard.py
- Create stat_active_users.ui, stat_new_users_month.ui, stat_total_orgs.ui widgets
- Add active users card to main stats row
- Add new row with new users this month and total organizations cards