Stand up a frontend test suite from zero

[aadityat23]

Category: Frontend · Difficulty: Intermediate · Effort: Large · Priority: Core

Skills: TypeScript, React, Next.js, Vitest or Jest, React Testing Library

Good for: Frontend Intern

Description: finverify-terminal/frontend currently has zero .test./.spec.* files anywhere in the tree. #59 sets up CI to lint/build the frontend but there's nothing for CI to run in terms of tests yet.

Expected outcome: Test runner configured, and initial coverage for the highest-traffic components under frontend/components/workspace and frontend/app/dashboard.

Acceptance criteria:

• npm test runs in CI (once No CI workflow lints or builds the frontend on push or pull request #59 lands); at least 5 components have meaningful test coverage
• documented testing conventions added to finverify-terminal/frontend's README.

Files: finverify-terminal/frontend/components/, frontend/app/

Dependencies: coordinate with #59 so CI wiring isn't duplicated.

Labels: frontend, testing, intermediate