## Summary
- Add explicit `if: always() && needs.ui-sb-build.result == 'success'`
to `ui-sb-test` job
## Context
After merging #21217, the main-branch Argos baseline pipeline doesn't
work: `ui-sb-test` is silently skipped on push to main, so no
`argos-screenshots-twenty-ui` artifact is produced.
**Root cause:** `changed-files-check` is skipped on push events
(PR-only). `ui-sb-build` handles this with `if: always() && ...`, but
`ui-sb-test` has no explicit `if` — GitHub Actions propagates the skip
through the transitive dependency chain (`changed-files-check` →
`ui-sb-build` → `ui-sb-test`).
## Test plan
- Merge this PR and verify the next push to main produces the
`argos-screenshots-twenty-ui` artifact
- Verify `dispatch-main` successfully triggers ci-privileged with the
artifact
badeaddd37