Email analytics

[ziadh]

Adds comprehensive email analytics to the dashboard with performance metrics, time series charts, and status breakdowns.

What's New

• Analytics Tab: You can view stats like delivery rates, bounce rates, and daily volume trends
• Date Range Picker: You can see stats from last 7/30/90 days or from any period
• Interactive Charts: Seamless visualization using Recharts
• Status Breakdown: Detailed table of email statuses with percentages

Technical Details

• Rate Limiting: 20 requests/minute per user to prevent database overload
• Performance: Added composite index (domain_id, created_at, status) for optimized queries
• Validation: Max 365-day date range to protect against expensive queries
• Query Optimization: Using date_trunc() instead of DATE() for better index utilization

Database Migration Required

Run this on your database after pulling:

CREATE INDEX IF NOT EXISTS idx_email_logs_analytics
ON email_logs(domain_id, created_at, status);


Files Changed

- API: src/app/api/analytics/route.ts
- Components: AnalyticsTab, DateRangePicker, MetricCard, TimeSeriesChart 
- Database: database.sql (new composite index)
- Dependencies: Added recharts, react-day-picker, date-fns