Invoice Generator App Lovable Prompt

Build an invoice generator app for freelancers and small businesses.

**Invoice Creation:**
- Create invoice form with client, invoice number, issue date, due date, currency, notes, and payment terms
- Line items with description, quantity, unit price, tax rate, and discount
- Automatic subtotal, tax, discount, and total calculation
- Invoice preview panel beside the form on desktop

**Client Management:**
- Client list with company name, contact person, email, address, and payment status summary
- Client detail page with invoices, paid amount, overdue amount, and notes

**Invoice Workflow:**
- Statuses: draft, sent, viewed, paid, overdue, cancelled
- Mark invoice as paid
- Duplicate invoice
- Download PDF placeholder
- Send invoice email placeholder

**Dashboard:**
- Total invoiced this month
- Paid invoices
- Overdue invoices
- Average payment time placeholder
- Recent invoice activity

**Data Model:**
- clients, invoices, invoice_items, payments, invoice_events, business_settings

**Design:**
- Professional finance interface
- Clean printable invoice preview
- Mobile-friendly creation flow
- Clear empty states for first invoice and first client

Use Supabase for auth and data. Add placeholders for PDF generation and payment links.