test: add unit tests for auth form validation (#121)

[zacharias-ona]

Closes #121

What

Adds unit tests for the sign-in and sign-up form components, covering validation attributes, error display, Supabase auth method calls, and post-auth redirect logic.

How

• src/app/(auth)/sign-up/page.test.tsx — 9 tests covering:

  • Form field rendering and validation attributes (required, type=email, minLength=6)
  • Display name required validation
  • Error message display on sign-up failure
  • supabase.auth.signUp called with correct email, password, and display_name
  • Redirect to workspace slug after successful sign-up
  • Fallback redirect to / when no workspace found
  • Submit button disabled during loading

• src/app/(auth)/sign-in/page.test.tsx — 8 tests covering:

  • Form field rendering and validation attributes (required, type=email, minLength=6)
  • Error message display on sign-in failure
  • supabase.auth.signInWithPassword called with correct email and password
  • Redirect to workspace slug after successful sign-in
  • Fallback redirect to / when no workspace found
  • Submit button disabled during loading

Both test files mock @/lib/supabase/client, next/navigation, next/link, and @/components/auth/oauth-buttons following the established pattern from workspace-settings-form.test.tsx.

Testing

• pnpm lint — ✅ pass
• pnpm typecheck — ✅ pass
• pnpm test — ✅ 122 tests pass (16 files), including 17 new tests

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Project	Deployment	Actions	Updated (UTC)
memo	Ready	Preview, Comment	Apr 16, 2026 11:36pm

[zacharias-ona]

✅ Post-merge verification skipped — test: PR does not affect the live app.

[zacharias-ona]

✅ UI verification skipped — this PR contains only test files (page.test.tsx), no UI changes to verify against the design spec.