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/lib/rectification-activity-labels.ts

@@ -33,6 +33,9 @@ export const RECTIFICATION_ACTIVITY_PROGRESS_LABELS: Readonly<Record<PublicRecti
   preparing_result: "正在准备结果…",
 };
 
+/** Live label between a completed tool and the next tool or spoken answer. */
+export const RECTIFICATION_ANALYZING_LIVE_LABEL = "正在分析…";
+
 export const RECTIFICATION_SLOW_STEP_MS = 45_000;
 export const RECTIFICATION_AGENT_ATTEMPT_TIMEOUT_MS = 210_000;
 export const RECTIFICATION_TIMEOUT_WARN_BEFORE_MS = 20_000;