Feature Request: Invoice Analytics Dashboard with Chart.js

Problem
There is currently no visual summary of invoice data — users have no way to quickly understand their billing health (how much is collected, what's overdue, monthly trends).

Solution
Add an Analytics Dashboard page using Chart.js with:

• Summary cards (total invoices, paid, overdue, total amount, collected)
• Doughnut chart: status breakdown (Paid / Pending / Overdue / Draft)
• Bar chart: monthly invoice totals vs collected amount

Acceptance criteria alignment

• Chart.js is listed in the project's required tech skills
• Dashboard supports the "end-to-end workflow: create → validate → store → export → pay" visibility goal

Scope

• src/components/Dashboard/Dashboard.tsx (new)
• src/components/Dashboard/InvoiceSummaryCards.tsx (new)
• src/pages/Home.tsx (modified)