Clarify “No winner” experiment end flow in A/B Testing

Users can select “No winner,” but the next step still requires a destination variation. This feels contradictory and makes users think “No winner” is broken.

• Requested behavior:

  • Update copy to explain: “No winner = no winning label, but you still need to choose destination traffic.”

  • Add inline helper text before step 2.

  • Disable confusion by renaming option to something like “No statistical winner (choose traffic destination next).”

• Acceptance criteria:

  • User can complete end-test flow without ambiguity.

  • Error/blocked state explicitly says what action is missing.

  • Support volume for this confusion drops.