test(web): Add AmountInput tests and vitest setup

[Oyintarede]

Summary

Adds a colocated AmountInput.test.tsx that verifies the component's primary rendered states and interactions, plus the minimal vitest infrastructure needed to run web component tests.

Changes

• apps/web/components/shared/AmountInput.test.tsx — 5 test cases covering:
  • default render with only required props (input type/step/min/placeholder/value, label, asset ticker, and no preview)
  • prop-driven overrides (custom label, placeholder, asset, disabled, required)
  • onChange fires with the entered value
  • onChange does not fire while disabled
  • styled preview only when showPreview + previewValue are provided (including previewLabel override and hidden-preview edge case)
• apps/web/vitest.config.mts + apps/web/vitest.setup.ts — jsdom environment, @ alias, and jest-dom matchers.
• apps/web/package.json — adds test script and dev deps (vitest, @testing-library/react, @testing-library/jest-dom, @testing-library/user-event, @vitejs/plugin-react, jsdom).
• .github/workflows/ci.yml — adds a web test step to the frontend CI job.

Verification (all green locally)

• pnpm --filter web exec tsc --noEmit — clean
• pnpm build — succeeds
• pnpm --filter web lint — clean
• pnpm --filter web test — 5/5 tests pass

---

Closes #503

[vercel]

@Oyintarede is attempting to deploy a commit to the K1NGD4VID Team on Vercel.

A member of the Team first needs to authorize it.

[mergekeeper]

MergeKeeper review

Scope: in scope for linked issue #503.
Verdict: clean

The pull request correctly adds the requested unit test file for AmountInput along with the necessary Vitest configuration, dependencies, and CI step.

Reviewed commit: 0992d2a462e2902a01963fdac80e78c0dd410efb.
CI and merge eligibility are checked separately.

[mergekeeper]

MergeKeeper merge status

Status: blocked
PR state: open
Mergeability: mergeable
Checked commit: 0992d2a462e2902a01963fdac80e78c0dd410efb.

Reason:
GitHub pull request merge request failed with 403: Resource not accessible by integration

Next steps:
GitHub rejected this as a permissions/ruleset problem, not a review problem — a maintainer merge override cannot force this through.

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3. Retry the merge once either is fixed.

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[mergekeeper]

Approved

Successfully added the colocated AmountInput unit test file along with the necessary Vitest setup and CI configuration.

[mergekeeper]

Approved

The pull request correctly adds the requested unit test file for AmountInput along with the necessary Vitest configuration, dependencies, and CI step.