- Add get_user_today_models() function to load_dashboard.py
Shows current user's today model call counts and amounts
- Create api/user_today_models.dspy endpoint
- Create user_today_models_chart.ui ChartBar widget (30s auto-refresh)
- Add '我的今日模型使用' card section to index.ui with refresh button
- Register new paths in load_path.py (logined permission)
