Phase 10: Add UI smoke and validation tests

[rpmoore]

Roadmap step 87 from docs/steps.md.

Scope

Add UI smoke and validation tests.

Details

Smoke-test primary screens, query review filters, suspicious source detail, local DNS entry forms/warnings, core forms, validation errors, unauthenticated redirects, and API-confirmed active-state updates.

References

• docs/steps.md Phase 10, step 87
• docs/plan/06-admin-api-ui.md#tests
• docs/plan/08-implementation-roadmap.md#milestone-10-admin-ui