[MEDIUM] Add comprehensive frontend component tests for dashboard, campaigns, and wallet

[kilodesodiq-arch]

Engineering Gap

Frontend has 30+ components but only 3 test files: EnhancedVerificationFlow.test.ts, VerificationFlow.test.ts, EvidenceArtifactViewer.test.tsx. Critical components with zero coverage: DashboardContent, campaign pages, ImportRecipientsWizard, WalletConnect, VerificationReview, ActivityCenter, AidDistributionMap.

Codebase Evidence

• app/frontend/src/components/__tests__/: Only 3 test files
• app/frontend/jest.config.ts: Jest configured with ts-jest and @testing-library/react installed
• app/frontend/src/lib/mock-api/: Mock API client exists — ready for test usage

Risk Profile

Current Risk

Frontend regression bugs caught only through manual testing.

Business Impact

Slower releases. Higher production bug rate. Reduced refactoring confidence.

Remediation Strategy

Prioritize by user impact: Dashboard > Campaigns > Verification Review > WalletConnect > Import Wizard. Test loading, empty, error, success states. Mock API with existing mock client.

Success Conditions

• Dashboard component tests: loading, empty, error, data states
• Campaign management tests: create, update, filter, archive
• Verification review tests: queue, filters, approval/rejection
• WalletConnect tests: connection states, error handling

Change Surface

New test files in app/frontend/src/components/__tests__/, app/frontend/src/app/__tests__/

Security Review

No security impact.

Completion Checklist

• Implementation completed
• Peer reviewed
• Tests passing
• Ready for merge

[brentthomas248]

I submitted PR #208 for this issue: #208

The change adds focused frontend coverage across the requested areas: dashboard loading/error/empty/data states, campaign create/filter/pause-resume/archive flows, verification queue/filter/approve/reject/resubmission flows, and WalletConnect connect/disconnect/error states.

Targeted verification is included in the PR body: 6 Jest suites / 20 tests pass, targeted ESLint passes, type-check passes. I also documented the existing baseline full-test and full-lint failures separately.