Refactoring CodeceptJS 4 Tests

Suites rot in three predictable ways: duplicated UI flows copy-pasted across files, fat locators repeated everywhere, raw JS escaping into Scenarios. The fix for each is moving the pattern to its proper home without changing behaviour.

Works targeted (a file or Scenario the user named) or global (the whole configured tests glob). Either way: propose first, apply in reviewable batches after approval.

Workflow