📊 Add merchant analytics dashboard — daily/monthly payment reports

[jahidulislamseo]

🎯 Feature Request

Merchants need more than just verification — they need business insights from their payment data.

📊 Dashboard Metrics to Add

Overview Cards:

• Total transactions today / this month
• Success rate (%)
• Total revenue by MFS type (bKash vs Nagad vs Rocket vs Upay)
• Average transaction value

Charts:

• Daily transaction volume (last 30 days) — line chart
• Payment method breakdown — pie chart
• Peak hours analysis — bar chart
• Failed vs successful payments — stacked bar

Export:

• CSV/Excel export for accounting
• Date range filter

🛠️ Tech

Can use Chart.js or Recharts (already in the stack). Keep it server-rendered for performance.