feat: build freelancer invoice dashboard

[newmattock]

Fixes #13

Summary

• add /dashboard/invoices for connected freelancers to review submitted invoices
• add status filtering, due-date/amount/status sorting, 20-item pagination, loading skeletons, empty state, and token-aware amount display
• add a submitter-scoped invoice query hook and tested dashboard filtering/pagination utilities
• carry narrow current-main build fixes for governance Vetoed status, TokenSelector helper typing, and federation home-domain typing

Validation

• npm test -- src/utils/__tests__/freelancerInvoiceDashboard.test.ts app/dashboard/invoices/__tests__/FreelancerInvoicesPage.test.tsx --pool forks --maxWorkers 1 --reporter verbose
• npm run lint -- app/dashboard/invoices/page.tsx app/dashboard/invoices/__tests__/FreelancerInvoicesPage.test.tsx src/hooks/useInvoices.ts src/utils/freelancerInvoiceDashboard.ts src/utils/__tests__/freelancerInvoiceDashboard.test.ts app/governance/page.tsx src/components/TokenSelector.tsx src/utils/federation.ts
• git diff --check
• npm run build
• local smoke: curl -I http://127.0.0.1:3031/dashboard/invoices -> HTTP/1.1 200 OK