fix(rectification): stop re-parsing settled messages on every stream frame

frontend/tests/rectification-surface-contract.test.ts

@@ -6,6 +6,7 @@ import { homeSurface as page } from "./home-surface.ts";
 
 const read = (relativePath: string) => readFileSync(new URL(relativePath, import.meta.url), "utf8");
 const chat = read("../src/components/rectification-agentic-chat.tsx");
+const messageEntry = read("../src/components/rectification-message-entry.tsx");
 const hook = read("../src/hooks/use-rectification-surface.ts");
 const sessions = read("../src/hooks/use-session-management.ts");
 const bootstrap = read("../src/lib/home-bootstrap.ts");
@@ -126,7 +127,10 @@ test("stopping keeps what streamed and says so; a 402 explains itself before lea
   // 新值：气泡 stopped + 灰字 RECTIFICATION_STOPPED_NOTICE，error-message 只留给真正失败
   // 原因：停止是用户动作，不能穿报错衣服（BUG-552）
   assert.match(chat, /failed: false,\s*stopped: true/);
-  assert.match(chat, /stoppedNotice=\{message\.stopped \? RECTIFICATION_STOPPED_NOTICE : undefined\}/);
+  // 原值: 停止提示 prop 写在容器 map 的 ChatMessageRow 上。
+  // 新值: 同一表达式在行组件内。
+  // 原因: BUG-725。
+  assert.match(messageEntry, /stoppedNotice=\{message\.stopped \? RECTIFICATION_STOPPED_NOTICE : undefined\}/);
   assert.doesNotMatch(chat, /if \(raw\.trim\(\)\) setError\(RECTIFICATION_STOPPED_NOTICE\)/);
   assert.match(chat, /inputDisabled=\{readonly\}/);
   assert.match(chat, /setError\(RECTIFICATION_INSUFFICIENT_CREDITS_NOTICE\);[\s\S]*onOpenBilling\?\.\(\{ source: "rectification" \}\);/);