feat(finance): add repeated expenses dashboard chart

[ItsThompson]

Summary

• Add a desktop Repeated Expenses dashboard widget backed by existing expense suggestions API
• Add dashboard-specific frecency data hook with loading, empty, error, success, and abort handling
• Add acceptance and hook tests for populated, empty, and failed suggestion states
• Scope affected E2E dashboard expense assertions to Recent Expenses to avoid strict-mode collisions with chart labels

Verification

• npm --prefix frontend/apps/finance test -- --run src/features/dashboard/__tests__/useExpenseFrecencyData.test.ts src/features/dashboard/__tests__/DashboardFeature.test.tsx
• npm --prefix frontend/apps/finance test -- --run
• npm --prefix e2e test -- tests/admin-assumption.spec.ts tests/mobile-expense.spec.ts tests/registration-onboarding.spec.ts
• npm --prefix frontend/apps/finance run build succeeded, with existing Module Federation DTS warning from unrelated src/features/settings/hooks/useDefaultBudget.ts NodeJS namespace issue
• Review reported tsc --noEmit passed