Marketplace:
- Add skeleton loading states for stats grid and GPU offer cards
- Show animated skeleton placeholders during data fetch
- Add skeleton CSS with shimmer animation and dark mode support
- Wrap stats section in #stats-grid container for skeleton injection
Trade Exchange:
- Replace inline header with data-global-header component
- Switch GPU offers to production API (/api/miners/list)
- Add fallback to demo
Backend:
- Simplify DatabaseConfig: remove effective_url property and project root finder
- Update to Pydantic v2 model_config (replace nested Config class)
- Add web_vitals router to main.py and __init__.py
- Fix ExplorerService datetime handling (ensure timezone-naive comparisons)
- Fix status_label extraction to handle both enum and string job states
Frontend (Marketplace):
- Add dark mode toggle with system preference detection
