fix(rectification): keep a live analyzing step and drop the range-stop exits

A completed tool left only checkmarks under 正在分析, so the run looked stuck. The composer and scoring-card 先这样 buttons were unused early exits.

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

frontend/src/components/rectification-agentic-chat.tsx

@@ -15,6 +15,7 @@ import {
 } from "@/lib/agent-activity-trace";
 import {
   RECTIFICATION_ACTIVITY_PROGRESS_LABELS,
+  RECTIFICATION_ANALYZING_LIVE_LABEL,
   RECTIFICATION_TOOL_DONE_LABELS,
   RECTIFICATION_TOOL_PROGRESS_LABELS,
   activityTraceFromReceipt,
@@ -938,8 +939,8 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
             });
             completedReceipt = receiptFromRectificationActivityState(activityReceiptState);
             currentActivity = nextActivityView(currentActivity, {
-              phase: rectificationToolActivityPhase(tool),
-              label: rememberLiveActivity(RECTIFICATION_TOOL_DONE_LABELS[tool], tool),
+              phase: "evidence-validation",
+              label: rememberLiveActivity(RECTIFICATION_ANALYZING_LIVE_LABEL, null),
               completedTrail: rectificationCompletedTrail(activityReceiptState.completedSteps),
             });
             frames.touch();
@@ -1371,15 +1372,6 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
   const collectSpokenPrompt = currentQuestion?.kind === "collect_spoken"
     ? currentQuestion.prompt
     : null;
-  const showCollectStop = Boolean(
-    latestLiveQuestion
-    && latestLiveQuestion.kind === "collect_spoken"
-    && currentQuestion?.focus_id === latestLiveQuestion.focus_id
-    && !questionIsAnswered(latestLiveQuestion)
-    && !busy
-    && !readonly
-    && regeneratingMessageKey === null,
-  );
   const adoptedRangeLabel = candidateResult?.credibleRange
     ? `${candidateResult.credibleRange[0]}–${candidateResult.credibleRange[1]}`
     : null;
@@ -1459,16 +1451,6 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     void submitStructuredChoice(STOP_ACTION, "stop");
   }
 
-  function submitCollectStop() {
-    if (!latestLiveQuestion || latestLiveQuestion.kind !== "collect_spoken") return;
-    void submitStructuredChoice(STOP_ACTION, "stop", {
-      focusId: latestLiveQuestion.focus_id,
-      questionId: latestLiveQuestion.question_id,
-      probeId: latestLiveQuestion.probe_id,
-      caseRevision: choiceCard?.case_revision ?? 0,
-    });
-  }
-
   const boardPeek = compactBoard && !boardOpen ? (
     <RectificationBoardPeek
       result={candidateResult}
@@ -1707,16 +1689,6 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
             }}
             onStop={stopRun}
           />
-          {showCollectStop && (
-            <button
-              type="button"
-              className="rectification-collect-stop"
-              disabled={!canSend}
-              onClick={submitCollectStop}
-            >
-              {CHOICE_STOP_LABEL}
-            </button>
-          )}
 
           <div className="composer-footer">
             <ModelSelector