七麦数据

### Major Features Added

#### 1. Enhanced Caffeine Decay Tab
- **Interactive Decay Chart**: Real-time visualization of caffeine elimination from your system
- **Time Interval Selector**: Toggle between 1H, 6H, 12H, 24H, and 48H views (like stock charts)
- **Coffee Markers**: Clean coffee icons on the x-axis showing exact consumption times
- **Interactive Tooltips**: Tap coffee markers to see detailed information (coffee name, time, initial/remaining caffeine)
- **Peak Caffeine Tracking**: See your peak caffeine level for the day and when it occurred
- **Caffeine-Free Countdown**: Know exactly when you'll be caffeine-free

#### 2. Smart Visualizations
- Gradient fill under decay curve for better readability
- "NOW" indicator showing current time on the chart
- Adaptive axis labels based on selected time interval
- Smooth animations and transitions

#### 3. Important User Information
- Medical disclaimer explaining calculations are estimates
- Clear explanation of 5-hour caffeine half-life model
- Proper liability protection and healthcare consultation reminder

### Technical Improvements
- Simplified, cleaner UI design
- Better touch interactions with larger hit areas
- Optimized performance with memoization
- Enhanced TypeScript type safety
- Improved code organization

Better charts, bug fixes