fix(rectification): keep choice stems visible and align overlay adopt with the engine

Walkthrough polish: fail-closed empty D9 prompts, stop asserting the next question is on screen, vary same-domain collect copy, switch to reverse-verify after adopt, and let coverage route interview without blocking can_adopt.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/tests/rectification-range-offer-deadend.test.ts

@@ -574,10 +574,13 @@ test("userStopped completes with a review-only provisional range", () => {
     userStopped: true,
     candidateScores: ACTIVE.map((time) => ({ time, score: SCORES[time] ?? 0 })),
   });
-  assert.equal(stopped.sessionOutcome, "provisional_range_user_stopped");
-  // 原值是 true；用户停止只结束追问，不能绕过 coverage 和 holdout 门槛。
-  assert.equal(stopped.canAdopt, false);
+  assert.equal(stopped.sessionOutcome, "adopt_representative");
+  // 原断言 sessionOutcome=provisional_range_user_stopped 且 canAdopt=false
+  // → 新断言 adopt_representative 且 canAdopt=true。
+  // 用户停止结束追问；coverage 不再挡代表性采用。确认门仍关。
+  assert.equal(stopped.canAdopt, true);
   assert.equal(stopped.canOfferRange, true);
+  assert.equal(stopped.canConfirmExactMinute, false);
   assert.equal(isNonConvergingRangeOffer(stopped), false);
   const dossier = liveDossier([CAREER_2024_04, CAREER_2023_ACTIVATION], { status: "paused" });
   const fromDossier = decideFromDossier(dossier, { birthDate: "1997-08-08" });