diff --git a/docs/BUG_HISTORY.md b/docs/BUG_HISTORY.md
index b233d662..c2889c9e 100644
--- a/docs/BUG_HISTORY.md
+++ b/docs/BUG_HISTORY.md
@@ -4966,7 +4966,7 @@
 - 根因：BUG-328 把窄屏盘面改成工作区第二行（约 46% 高）且未设叠层；输入框 `.composer-wrap` 仍是 `position: relative; z-index: 2`。盘面与输入框在同一工作区网格里重叠时，输入框画在盘面标题之上。
 - 修复：仅在视口宽度小于 768px 的移动端，把盘面改成工作区内 `z-index: 20` 的底部 sheet 覆盖层；桌面网页仍是右侧分栏，不出现底部弹出。遮罩点击、Escape、44px 关闭按钮可关；聊天列在打开时 `inert`。
 - 验证：`frontend/tests/rectification-agentic-entry.test.ts`。
-- 防复发：底部 sheet 只允许 `matchMedia(max-width: 767px)` 触发，不得用聊天区 `clientWidth` 把桌面侧栏挤窄误判成移动端；桌面必须保持 `grid-template-columns: minmax(0, 1fr) minmax(18rem, 22.5rem)`。窄屏盘面必须是覆盖层（absolute、高于输入框的 z-index、不透明背景）。
+- 防复发：底部 sheet 只允许 `matchMedia(max-width: 767px)` 触发；工作区必须 `isolation: isolate` 且 `z-index: 0`，打开时隐藏 composer（含 `backdrop-filter`），覆盖层 z-index 必须高于输入框。不得用聊天区 `clientWidth` 把桌面侧栏挤窄误判成移动端。
 - 相关记录：BUG-322、BUG-326、BUG-328
 - 复发自：BUG-328（当时为了露出聊天改成下半屏分栏，叠层低于输入框）
 - 修复版本：9670b661
@@ -5019,6 +5019,54 @@
 - 复发自：无
 - 修复版本：9c4b64c9
 
+## BUG-334 | 移动端盘面覆盖层仍被输入框 backdrop-filter 盖住
+
+- 状态：resolved
+- 首次发现：2026-08-20
+- 最近更新：2026-08-20
+- 影响面：生时纠正窄屏盘面、`.composer-wrap`、`.rectification-board-overlay`
+- 用户现象：打开“当前盘面”后，输入区预览条仍叠在弹层标题上；覆盖层和输入框像同一层，聊天列表也被挡住看不清。
+- 触发条件：移动端视口打开宫位表。iOS Safari 上更明显。
+- 根因：`.composer-wrap` 带 `z-index: 2` 和 `backdrop-filter`。iOS 会把该滤镜层合成到覆盖层之上。BUG-330 只把 overlay 设为 `z-index: 20`，工作区没有独立层叠上下文，也没有在打开时关掉输入框滤镜。
+- 修复：工作区 `isolation: isolate; z-index: 0` 锁住输入框层叠；覆盖层 `z-index: 50`。打开盘面时隐藏 composer（`visibility: hidden`、关掉 `backdrop-filter`），并收起预览条。sheet 高度改为 72%，上方聊天列表可从遮罩后看见。
+- 验证：`frontend/tests/rectification-agentic-entry.test.ts`。
+- 防复发：窄屏覆盖层必须高于 composer；打开时 composer 不得再带 `backdrop-filter`。源码合同锁定 `isolation: isolate`、overlay `z-index: 50`、`visibility: hidden`。展开入口不得放在输入框上方，必须挂在页头右上角。
+- 相关记录：BUG-328、BUG-330、BUG-335
+- 复发自：BUG-330（覆盖层 z-index 未锁住 iOS backdrop-filter 合成层）
+- 修复版本：待发布
+
+## BUG-335 | 移动端当前盘面入口仍在输入框上方
+
+- 状态：resolved
+- 首次发现：2026-08-20
+- 最近更新：2026-08-20
+- 影响面：生时纠正窄屏盘面入口、`.chat-header-actions`、`.rectification-board-peek`
+- 用户现象：点开盘面的按钮在输入框上方，占掉打字区；希望放到右上角。
+- 触发条件：窄屏生时纠正会话。
+- 根因：`RectificationBoardPeek` 渲染在 `.composer-wrap` 里，输入框上方整条通栏。
+- 修复：页头 `chat-header-actions` 增加挂载点；窄屏未打开盘面时把预览按钮 portal 到余额按钮左侧。输入框上方不再放展开入口。
+- 验证：`frontend/tests/rectification-agentic-entry.test.ts`。
+- 防复发：源码合同锁定 `createPortal`、`data-rectification-header-slot`，并禁止 composer 内出现 `RectificationBoardPeek`。
+- 相关记录：BUG-330、BUG-334
+- 复发自：BUG-330（窄屏入口一开始就放在输入区）
+- 修复版本：待发布
+
+## BUG-336 | 初始化对话列表与资料卡不在同一栏
+
+- 状态：resolved
+- 首次发现：2026-08-20
+- 最近更新：2026-08-20
+- 影响面：首页 onboarding `.welcome`、出生资料卡、输入框
+- 用户现象：新用户初始化时，对话气泡和出生日期卡片左右对不齐；称呼阶段输入框也比上面的对话更窄。
+- 触发条件：未完成资料的新会话，尤其是填写出生日期与时间的步骤。
+- 根因：`.welcome` 被后续规则拉到 1040px 且无水平居中；资料卡 `max-width: 680/760px` 靠左。会话正文和输入框已经收成 760px 栏，初始化没有走同一套栏宽。
+- 修复：未完成资料时给会话加上 `is-onboarding`。欢迎区和资料卡使用 `--session-column-width`，与正式会话、输入框同一栏。
+- 验证：`frontend/tests/session-conversation-layout.test.ts`。
+- 防复发：源码合同锁定 `is-onboarding`、欢迎区栏宽和资料卡 `width: 100%; max-width: none`。
+- 相关记录：无
+- 复发自：无
+- 修复版本：待发布
+
 ## 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
diff --git a/frontend/src/app/globals.css b/frontend/src/app/globals.css
index 9dca3ade..239a9477 100644
--- a/frontend/src/app/globals.css
+++ b/frontend/src/app/globals.css
@@ -1763,8 +1763,24 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
 .onboarding-card-heading b { font-size: clamp(22px, 2.6vw, 30px); letter-spacing: -.03em; }
 .onboarding-card-heading small { max-width: 260px; color: var(--color-ink-secondary); line-height: 1.55; font-size: var(--type-caption); text-wrap: pretty; }
 .birth-time-intake { gap: var(--space-6); }
+.conversation.is-onboarding .welcome {
+  box-sizing: border-box;
+  width: min(calc(var(--session-column-width) + (var(--session-column-gutter) * 2)), 100%);
+  margin-inline: auto;
+}
+.conversation.is-onboarding.is-empty .welcome {
+  width: min(var(--session-column-width), 100%);
+}
+.conversation.is-onboarding .onboarding-card,
+.conversation.is-onboarding .onboarding-card.birth-time-transition-card {
+  width: 100%;
+  max-width: none;
+  margin-inline: 0;
+}
 .conversation.is-onboarding-form { align-content: start; padding-bottom: var(--space-8); }
-.conversation.is-onboarding-form .welcome { padding-top: var(--space-6); padding-bottom: var(--space-8); }
+.conversation.is-onboarding-form .welcome {
+  padding: var(--space-6) var(--session-column-gutter) var(--space-8);
+}
 .conversation.is-onboarding-form .welcome > .onboarding-message:first-child { padding-bottom: var(--space-3); }
 .conversation.is-onboarding-form .welcome > .onboarding-message:first-child .message-bubble p {
   max-width: 680px;
@@ -1876,6 +1892,8 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
 
 .rectification-workspace {
   position: relative;
+  z-index: 0;
+  isolation: isolate;
   min-width: 0;
   min-height: 0;
   height: 100%;
@@ -1908,6 +1926,12 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
   position: relative;
   z-index: 2;
 }
+.rectification-workspace.is-compact.is-board-open .rectification-workspace__chat .composer-wrap {
+  z-index: 0;
+  visibility: hidden;
+  pointer-events: none;
+  backdrop-filter: none;
+}
 .rectification-board {
   min-width: 0;
   min-height: 0;
@@ -1920,10 +1944,9 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
 .rectification-workspace.is-compact .rectification-board-overlay {
   position: absolute;
   inset: 0;
-  z-index: 20;
+  z-index: 50;
   display: grid;
   align-items: end;
-  isolation: isolate;
 }
 .rectification-board-scrim {
   position: absolute;
@@ -1937,7 +1960,7 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
   position: relative;
   z-index: 1;
   width: 100%;
-  height: 92%;
+  height: 72%;
   max-height: 100%;
   min-height: 0;
   overflow: hidden;
@@ -2102,6 +2125,33 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
   color: var(--color-ink);
   font-size: var(--type-caption);
 }
+.chat-header-rectification:empty {
+  display: none;
+}
+.chat-header-rectification .rectification-board-peek {
+  display: inline-flex;
+  align-items: center;
+  justify-content: flex-end;
+  width: auto;
+  max-width: min(11.5rem, 42vw);
+  min-height: 44px;
+  margin: 0;
+  padding: 0 var(--space-3);
+  gap: var(--space-2);
+}
+.chat-header-rectification .rectification-board-peek strong,
+.chat-header-rectification .rectification-board-peek span {
+  display: inline;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+@media (max-width: 480px) {
+  .chat-header-rectification .rectification-board-peek span {
+    display: none;
+  }
+}
 .rectification-board-peek {
   display: flex;
   align-items: center;
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index ae7792f4..cff7d144 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -3559,6 +3559,7 @@ 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="" />
             <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>
@@ -3567,7 +3568,7 @@ export default function Home() {
           </header>
 
         {!rectificationSurfaceOpen && (
-          <div ref={conversation} className={`conversation ${!activeSession?.messages.length && !onboardingFormActive ? "is-empty" : ""} ${onboardingFormActive ? "is-onboarding-form" : ""}`}>
+          <div ref={conversation} className={`conversation${!activeSession?.messages.length && !onboardingFormActive ? " is-empty" : ""}${!profileComplete ? " is-onboarding" : ""}${onboardingFormActive ? " is-onboarding-form" : ""}`}>
             {!activeSession?.messages.length ? (
             <div className="welcome">
               {!profileComplete ? (
diff --git a/frontend/src/components/rectification-agentic-chat.tsx b/frontend/src/components/rectification-agentic-chat.tsx
index 021d1241..b3245507 100644
--- a/frontend/src/components/rectification-agentic-chat.tsx
+++ b/frontend/src/components/rectification-agentic-chat.tsx
@@ -2,6 +2,7 @@
 
 import { ArrowUp, Square } from "lucide-react";
 import { useCallback, useEffect, useId, useLayoutEffect, useRef, useState } from "react";
+import { createPortal } from "react-dom";
 import { parseAgentReply } from "@/lib/agent-reply";
 import type { ChatMessage, ChatMessageView } from "@/lib/chat-message-view";
 import {
@@ -262,9 +263,14 @@ 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 = () => {
@@ -682,11 +688,21 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     : undefined;
   const canSend = !busy && !readonly && !regeneratingMessageKey;
 
+  const boardPeek = compactBoard && !boardOpen ? (
+    <RectificationBoardPeek
+      result={candidateResult}
+      expanded={boardOpen}
+      boardId={boardId}
+      onOpen={toggleBoard}
+    />
+  ) : null;
+
   return (
     <div
       ref={workspace}
       className={`rectification-workspace${compactBoard ? " is-compact" : ""}${boardOpen ? " is-board-open" : ""}`}
     >
+      {headerSlot && boardPeek ? createPortal(boardPeek, headerSlot) : null}
       <div className="rectification-workspace__chat" inert={compactBoard && boardOpen ? true : undefined}>
         <section ref={conversation} className="conversation is-rectification" aria-label="生时校正对话" aria-busy={busy || regeneratingMessageKey !== null}>
           <div className="message-list">
@@ -777,14 +793,6 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
       </section>
 
         <div className="composer-wrap">
-          {compactBoard && (
-            <RectificationBoardPeek
-              result={candidateResult}
-              expanded={boardOpen}
-              boardId={boardId}
-              onOpen={toggleBoard}
-            />
-          )}
           <form className="composer" onSubmit={submit}>
           <Textarea
             ref={composer}
diff --git a/frontend/src/components/rectification-board.tsx b/frontend/src/components/rectification-board.tsx
index f0248b34..94e89a6a 100644
--- a/frontend/src/components/rectification-board.tsx
+++ b/frontend/src/components/rectification-board.tsx
@@ -271,6 +271,7 @@ export function RectificationBoardPeek({
     <button
       className="rectification-board-peek"
       type="button"
+      aria-label={peek.detail ? `${peek.title}，${peek.detail}` : peek.title}
       aria-expanded={expanded}
       aria-controls={boardId}
       onClick={onOpen}
diff --git a/frontend/tests/rectification-agentic-entry.test.ts b/frontend/tests/rectification-agentic-entry.test.ts
index 617e4fda..d04f6fd6 100644
--- a/frontend/tests/rectification-agentic-entry.test.ts
+++ b/frontend/tests/rectification-agentic-entry.test.ts
@@ -392,11 +392,17 @@ test("the natal house table is a live board beside the chat, not a message", ()
 
 test("compact board overlays chat as a bottom sheet above the composer", () => {
   assert.doesNotMatch(styles, /\.rectification-workspace\.is-compact\.is-board-open \{[\s\S]*grid-template-rows: minmax\(8rem, 1fr\) minmax\(13rem, 46%\)/);
+  assert.match(styles, /\.rectification-workspace \{[\s\S]*isolation: isolate/);
+  assert.match(styles, /\.rectification-workspace \{[\s\S]*z-index: 0/);
   assert.match(styles, /\.rectification-workspace\.is-compact \.rectification-board-overlay \{[\s\S]*position: absolute/);
   assert.match(styles, /\.rectification-workspace\.is-compact \.rectification-board-overlay \{[\s\S]*inset: 0/);
-  assert.match(styles, /\.rectification-workspace\.is-compact \.rectification-board-overlay \{[\s\S]*z-index: 20/);
+  assert.match(styles, /\.rectification-workspace\.is-compact \.rectification-board-overlay \{[^}]*z-index: 50/);
+  assert.doesNotMatch(styles, /\.rectification-workspace\.is-compact \.rectification-board-overlay \{[^}]*z-index: 20/);
+  assert.match(styles, /\.rectification-workspace\.is-compact\.is-board-open \.rectification-workspace__chat \.composer-wrap \{[\s\S]*visibility: hidden/);
+  assert.match(styles, /\.rectification-workspace\.is-compact\.is-board-open \.rectification-workspace__chat \.composer-wrap \{[\s\S]*backdrop-filter: none/);
   assert.match(styles, /\.rectification-workspace__chat \.composer-wrap \{[\s\S]*z-index: 2/);
-  assert.match(styles, /\.rectification-board\.is-sheet \{[\s\S]*height: 92%/);
+  assert.match(styles, /\.rectification-board\.is-sheet \{[^}]*height: 72%/);
+  assert.doesNotMatch(styles, /\.rectification-board\.is-sheet \{[^}]*height: 92%/);
   assert.match(styles, /\.rectification-board\.is-sheet \{[\s\S]*background: var\(--color-canvas\)/);
   assert.match(styles, /\.rectification-board\.is-sheet \{[\s\S]*border-block-start: 1px solid var\(--color-border\)/);
   assert.match(styles, /@keyframes rectification-sheet-enter \{[\s\S]*translateY\(18%\)/);
@@ -404,6 +410,14 @@ test("compact board overlays chat as a bottom sheet above the composer", () => {
   assert.match(styles, /\.rectification-board__close \{[\s\S]*width: 44px/);
   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(page, /className="chat-header-rectification"/);
+  assert.match(page, /data-rectification-header-slot=""/);
+  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/);
   assert.match(chat, /className=\{`rectification-workspace\$\{compactBoard \? " is-compact" : ""\}\$\{boardOpen \? " is-board-open" : ""\}`\}/);
 });
 
diff --git a/frontend/tests/session-conversation-layout.test.ts b/frontend/tests/session-conversation-layout.test.ts
index b4cb57b6..6dc7f197 100644
--- a/frontend/tests/session-conversation-layout.test.ts
+++ b/frontend/tests/session-conversation-layout.test.ts
@@ -13,6 +13,15 @@ test("aligns the session transcript and composer to one readable column", () =>
   assert.match(globalStyles, /\.conversation:not\(\.is-empty\):not\(\.is-rectification\) \+ \.composer-wrap \.composer-footer[^\{]*\{[^}]*width:\s*min\(var\(--session-column-width\),\s*100%\)/);
 });
 
+test("keeps onboarding transcript and intake card on the same session column", () => {
+  const pageSource = readProjectFile("src/app/page.tsx");
+  assert.match(pageSource, /\$\{!profileComplete \? " is-onboarding" : ""\}/);
+  assert.match(globalStyles, /\.conversation\.is-onboarding \.welcome \{[\s\S]*width:\s*min\(calc\(var\(--session-column-width\) \+ \(var\(--session-column-gutter\) \* 2\)\), 100%\)/);
+  assert.match(globalStyles, /\.conversation\.is-onboarding\.is-empty \.welcome \{[\s\S]*width:\s*min\(var\(--session-column-width\), 100%\)/);
+  assert.match(globalStyles, /\.conversation\.is-onboarding \.onboarding-card,\s*\n\.conversation\.is-onboarding \.onboarding-card\.birth-time-transition-card \{[\s\S]*width:\s*100%;[\s\S]*max-width:\s*none/);
+  assert.match(globalStyles, /\.conversation\.is-onboarding-form \.welcome \{[\s\S]*padding:\s*var\(--space-6\) var\(--session-column-gutter\) var\(--space-8\)/);
+});
+
 test("keeps message motion restrained and honors reduced-motion preferences", () => {
   assert.match(messageRowSource, /gsap\.matchMedia\(\)/);
   assert.match(messageRowSource, /prefers-reduced-motion:\s*no-preference/);