fix(rectification): place completion receipt above reply

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

@@ -181,7 +181,7 @@ test("Agentic rectification scrolls the conversation container as streamed messa
   assert.doesNotMatch(chat, /conversationEnd|scrollIntoView/);
 });
 
-test("rectification activity separates live work from the receipt below the Agent message", () => {
+test("rectification activity separates live work from the receipt above the Agent message", () => {
   const activityHelper = chat.slice(
     chat.indexOf("function completedReceiptFromPersisted"),
     chat.indexOf("export function RectificationAgenticChat"),
@@ -204,7 +204,7 @@ test("rectification activity separates live work from the receipt below the Agen
     chat.indexOf('{messages.map((message) => ('),
     chat.indexOf('{candidateResult?.selectionAllowed'),
   );
-  assert.ok(messageRender.indexOf("<ChatMessageRow") < messageRender.indexOf("<CompletedActivityReceipt"));
+  assert.ok(messageRender.indexOf("<CompletedActivityReceipt") < messageRender.indexOf("<ChatMessageRow"));
   assert.match(completedActivityReceipt, /<details className=/);
   assert.doesNotMatch(completedActivityReceipt, /<details[^>]*\sopen/);
   assert.match(completedActivityReceipt, /本轮完成 · \$\{stepLabels\.length\} 个步骤 · \$\{receipt\.methods\.length\} 项计算依据/);