- Add refund button to invoice detail modal (paid Stripe invoices only)
- Full refund (default) and partial refund via confirmation dialog
- Call POST /api/invoices/:id/refund on confirmation
- Display Stripe payment info (card last4, brand, payment status)
- Show refund status when invoice has been refunded
- Add payment stats section to InvoicesPage (revenue, outstanding, refunds, method breakdown)
- Add GET /api/invoices/:id/stripe-payment endpoint for card details
- Add GET /api/invoices/stats endpoint for monthly payment stats
- Extend Invoice type with Stripe fields (stripePaymentIntentId, stripeRefundId)
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Flea Flicker
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