fix(rectification): show question stems and unblock adopt after occupation

Choice legends and spoken collect prompts were hidden after BUG-461, and occupation still blocked canAdopt once dated coverage was done. Restore visible stems and stop polling extra collects when adopt is allowed.

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

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

@@ -325,6 +325,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
   const [boardDiff, setBoardDiff] = useState(() => diffRectificationBoard(null, null));
   const boardId = useId();
   const boardTitleId = useId();
+  const collectSpokenPromptId = useId();
 
   useLayoutEffect(() => {
     const query = window.matchMedia(`(max-width: ${RECTIFICATION_BOARD_SPLIT_MIN_PX - 1}px)`);
@@ -1229,6 +1230,11 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
                 onStop={submitStop}
               />
             )}
+            {collectSpokenPrompt && !showLiveChoiceCard && !readonly && (
+              <p id={collectSpokenPromptId} className="rectification-question-slot__prompt">
+                {collectSpokenPrompt}
+              </p>
+            )}
             {showMissingQuestion && (
               <p className="rectification-question-slot__status" role="status">
                 当前没有可回答的问题，正在等待服务端更新。
@@ -1278,6 +1284,9 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
           <Textarea
             ref={composer}
             aria-label={readonly ? "该校正已结束，只能查看历史" : "继续描述你的经历或回答"}
+            aria-describedby={collectSpokenPrompt && !showLiveChoiceCard && !readonly
+              ? collectSpokenPromptId
+              : undefined}
             value={draft}
             disabled={!canSend}
             placeholder={readonly