fix(web): restore rectification discriminator cards and stop-offer path

Coverage-complete ties never persisted A/B/C/D because contrast probes were stamped with an answered education quality probe, remaining minutes were asked as window D10 signs, and 「没有了」 missed the stop pattern.

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

frontend/tests/rectification-agentic-entry.test.ts

@@ -574,7 +574,7 @@ test("rectification Agent output stays natural and keeps tool execution silent",
   assert.match(agent, /本轮做了什么/);
   assert.match(agent, /完成凭证完全由服务端公开 Activity\/receipt 展示/);
   assert.match(agent, /禁止只说记下了、会话会保留、以后再继续/);
-  assert.match(agent, /暂时想不到了 \/ 没有更多 \/ 先这样/);
+  assert.match(agent, /暂时想不到了 \/ 没有更多 \/ 没有了 \/ 没了 \/ 没有其它 \/ 想不起来了 \/ 先这样/);
   assert.match(agent, /on_user_stop/);
   assert.match(agent, /skill_verification_report/);
   assert.match(agent, /D9\/D10 类型对照/);