fix(web): portal the natal board peek without effect setState

Quality gate lint failed on setHeaderSlot inside useLayoutEffect, so staging never published. Pass the header mount node from a callback ref instead.

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

docs/BUG_HISTORY.md

@@ -5099,6 +5099,22 @@
 - 复发自：BUG-204（报告页 chunk 偏斜已修，首页引导层仍会把同一失败画成永久 loading）
 - 修复版本：50e1a4ac
 
+## BUG-339 | staging quality gate 因盘面入口 effect 同步 setState 失败
+
+- 状态：resolved
+- 首次发现：2026-08-21
+- 最近更新：2026-08-21
+- 影响面：Gitea `backend-quality-gate` `validate`、`rectification-agentic-chat` 窄屏盘面入口 portal
+- 用户现象：向 `staging` 推送后 quality gate 失败，镜像未发布，站点仍停在上一版。日志是 `react-hooks/set-state-in-effect`。
+- 触发条件：`npm run lint --prefix frontend`。自 `8b8e5214` 起，gate run 2019/2020/2021 均因此失败。
+- 根因：窄屏盘面入口用 `useLayoutEffect` 里 `querySelector` 后立刻 `setHeaderSlot`。`eslint-config-next` 禁止在 effect 同步 setState。BUG-335 把入口 portal 到页头时引入该写法。
+- 修复：页头挂载点改用 callback ref，把 DOM 节点作为 `headerSlot` 传给校时会话。仍 `createPortal` 到 `data-rectification-header-slot`，不再在 effect 里查 DOM 或 setState。
+- 验证：`frontend/tests/rectification-agentic-entry.test.ts`；`npm run lint --prefix frontend -- src/components/rectification-agentic-chat.tsx`。
+- 防复发：盘面入口不得在 effect 里 `querySelector` 后同步 setState。源码合同锁定 callback ref 与 `headerSlot` prop，并禁止 chat 内 `setHeaderSlot`。
+- 相关记录：BUG-335、BUG-334
+- 复发自：BUG-335（把入口 portal 到页头时用了 effect 同步 setState）
+- 修复版本：待提交
+
 ## BUG-329 | 生时纠正 Agent 回答在结算后一次性出现，推理中无法停止
 
 - 状态：resolved

frontend/src/app/page.tsx

@@ -1074,6 +1074,7 @@ export default function Home() {
   );
   const [rectificationSessionId, setRectificationSessionId] = useState<string | null>(null);
   const [rectificationCaseId, setRectificationCaseId] = useState<string | null>(null);
+  const [rectificationHeaderSlot, setRectificationHeaderSlot] = useState<HTMLElement | null>(null);
   const [rectificationPendingQuestion, setRectificationPendingQuestion] = useState<string | null>(null);
   const [rectificationLoading, setRectificationLoading] = useState(false);
   const [rectificationMutationPending, setRectificationMutationPending] = useState(false);
@@ -3566,7 +3567,7 @@ export default function Home() {
             <strong>{activeSession?.title || "新对话"}</strong>
           </div>
           <div className="chat-header-actions">
-            <div className="chat-header-rectification" data-rectification-header-slot="" />
+            <div className="chat-header-rectification" data-rectification-header-slot="" ref={setRectificationHeaderSlot} />
             <button className="credit-button" type="button" onClick={() => router.push(membershipHref("credits"))} aria-label={account ? `余额 ${account.credits} 点，会员与充值` : accountError || "读取余额中"}>
               <Sparkles className="credit-icon" aria-hidden="true" />
               <span>{account ? account.credits : "—"}</span>
@@ -3806,6 +3807,7 @@ export default function Home() {
             onStartConsultation={() => void startConsultationAfterRectification()}
             pendingConsultationQuestion={rectificationPendingQuestion}
             onRestart={() => void startNewRectification()}
+            headerSlot={rectificationHeaderSlot}
           />
         )}
 

frontend/src/components/conversational-birth-time-rectification.tsx

@@ -36,6 +36,7 @@ export type ConversationalBirthTimeRectificationProps = Readonly<{
   onStartConsultation?: () => void;
   pendingConsultationQuestion?: string | null;
   onRestart?: () => void;
+  headerSlot: HTMLElement | null;
 }>;
 
 export function ConversationalBirthTimeRectification(props: ConversationalBirthTimeRectificationProps) {

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

@@ -142,6 +142,7 @@ type RectificationAgenticChatProps = Readonly<{
   onStartConsultation?: () => void;
   pendingConsultationQuestion?: string | null;
   onRestart?: () => void;
+  headerSlot: HTMLElement | null;
 }>;
 
 type RenderMessage = ChatMessageView & {
@@ -240,6 +241,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     onStartConsultation,
     pendingConsultationQuestion,
     onRestart,
+    headerSlot,
   } = props;
 
   const [messages, setMessages] = useState<RenderMessage[]>(() => messagesFromTurns(initialTurns));
@@ -263,14 +265,9 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
   const [compactBoard, setCompactBoard] = useState(false);
   const [boardOpen, setBoardOpen] = useState(false);
   const [boardDiff, setBoardDiff] = useState(() => diffRectificationBoard(null, null));
-  const [headerSlot, setHeaderSlot] = useState<HTMLElement | null>(null);
   const boardId = useId();
   const boardTitleId = useId();
 
-  useLayoutEffect(() => {
-    setHeaderSlot(document.querySelector("[data-rectification-header-slot]"));
-  }, []);
-
   useLayoutEffect(() => {
     const query = window.matchMedia(`(max-width: ${RECTIFICATION_BOARD_SPLIT_MIN_PX - 1}px)`);
     const update = () => {

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

@@ -411,10 +411,13 @@ test("compact board overlays chat as a bottom sheet above the composer", () => {
   assert.match(styles, /\.rectification-board__close \{[\s\S]*min-height: 44px/);
   assert.match(board, /<X aria-hidden="true"/);
   assert.match(chat, /compactBoard && !boardOpen \? \(/);
-  assert.match(chat, /createPortal\(/);
-  assert.match(chat, /\[data-rectification-header-slot\]/);
+  assert.match(chat, /headerSlot && boardPeek \? createPortal\(boardPeek, headerSlot\)/);
+  assert.doesNotMatch(chat, /querySelector\(/);
+  assert.doesNotMatch(chat, /setHeaderSlot/);
   assert.match(page, /className="chat-header-rectification"/);
   assert.match(page, /data-rectification-header-slot=""/);
+  assert.match(page, /ref=\{setRectificationHeaderSlot\}/);
+  assert.match(page, /headerSlot=\{rectificationHeaderSlot\}/);
   assert.match(styles, /\.chat-header-rectification \.rectification-board-peek \{[\s\S]*width: auto/);
   assert.doesNotMatch(chat, /rectification-workspace__board-trigger/);
   assert.doesNotMatch(chat.slice(chat.indexOf("className=\"composer-wrap\""), chat.indexOf("<form className=\"composer\"")), /RectificationBoardPeek/);