[US-024] Invoice generation and billing history #7
Description
User Story
As a store owner,
I want to view and download my billing history and invoices,
So that I can keep proper business records.
Acceptance Criteria
- Billing page lists all past payments with: date, amount, plan, status
- Download invoice as PDF (branded Liemo invoice)
- Invoice includes: Liemo business details, store details, VAT line (KW), line items
- Email invoice resend button
- Failed payment prominently shown with retry CTA