Fix red develop 5cd29f72e85e

The merge lane found `develop` red at `5cd29f72e85e40e3601935d4bfef7f964c74e786` on its own: no queued PR merges until it is fixed. Failing (tests and gate stages): - `frontend-smoke-playwright-load-isolated` - … and 1 more: read them in the gate log, as untrusted output The whole gate log: artifact `7708` on lane task 8587. Make `develop` pass its full gate again. Open a PR as usual: the merge lane merges a PR that fixes some of these and adds no failure even while `develop` is red.

Fixed red develop: the onboarding e2e expected exact text, but #6491 moved the "Use a different account" button into that line. Updated the assertion; the spec passes locally and the quick gate is green. PR #6492 is queued in the merge lane. Memory: none applied.