fix(chat): align mobile controls and suppress steering completion warning

src/mobile-web/src/styles/components/chat-input.scss

@@ -315,8 +315,8 @@
 
 .chat-page__action-btn {
   flex-shrink: 0;
-  width: var(--openbitfun-space-12);
-  height: var(--openbitfun-space-12);
+  width: 44px;
+  height: 44px;
   border-radius: 50%;
   border: none;
   background: transparent;
@@ -339,8 +339,8 @@
 
 .chat-page__send-btn {
   position: relative;
-  width: var(--openbitfun-space-12);
-  height: var(--openbitfun-space-12);
+  width: 44px;
+  height: 44px;
   border-radius: 50%;
   border: 1px solid var(--openbitfun-color-border-subtle);
   background: var(--openbitfun-color-action-neutral-surface);
@@ -554,7 +554,7 @@
 
 // Conversation composer layout and skin. Shared geometry belongs to MobileComposer.
 .chat-page__composer {
-  padding: 0 8px;
+  padding: 5px;
   border-color: var(--openbitfun-color-border-subtle);
   border-radius: 28px;
   background: var(--openbitfun-color-surface-panel);
@@ -564,7 +564,7 @@
 .chat-page__composer[data-expanded='true'] {
   height: auto;
   max-height: none;
-  padding: 8px;
+  padding: 5px;
   border-radius: 18px;
 }
 
@@ -575,9 +575,9 @@
 .chat-page__composer-leading {
   display: grid;
   place-items: center;
-  flex: 0 0 48px;
-  width: 48px;
-  height: 48px;
+  flex: 0 0 44px;
+  width: 44px;
+  height: 44px;
   padding: 0;
   border: 0;
   border-radius: 20px;
@@ -608,8 +608,8 @@
 }
 
 .chat-page__input-wrap.is-expanded .chat-page__action-btn {
-  width: 48px;
-  height: 48px;
+  width: 44px;
+  height: 44px;
   color: var(--openbitfun-color-content-primary);
 }
 
@@ -645,3 +645,8 @@
   aspect-ratio: 1;
   &:hover, &:active, &:focus { border-radius: 50%; }
 }
+
+// Keep the action row and collapsed pill on the same inset in both modes.
+.chat-page__composer [data-openbitfun-part='toolbar'] {
+  min-block-size: 44px;
+}

src/mobile-web/src/styles/components/harmony-native.scss

@@ -1361,7 +1361,9 @@
 .chat-msg__assistant-content {
   width: 100%;
   max-width: 100%;
-  padding: 0 2px 10px 0;
+  padding: 0 var(--size-gap-3) 10px;
+  box-sizing: border-box;
+  min-width: 0;
   border: 0;
   border-radius: 0;
   background: transparent;

src/mobile-web/src/styles/host-queue.scss

@@ -10,7 +10,8 @@
   font-size: var(--openbitfun-type-body-sm-font-size);
   line-height: var(--openbitfun-type-body-sm-line-height);
 
-  &__header { display: flex; align-items: center; padding: 0 12px; }
+  // 7px + half a 40px queue control matches the composer: 5px + half of 44px.
+  &__header { display: flex; align-items: center; padding: 0 7px 0 12px; }
   &__toggle {
     display: flex;
     align-items: center;
@@ -53,7 +54,7 @@
   &__list {
     list-style: none;
     margin: 0;
-    padding: 0 12px;
+    padding: 0 7px 0 12px;
     li { padding: 4px 0; border-top: 1px solid var(--openbitfun-color-border-subtle); }
     p { margin: 0 0 4px; }
   }

src/mobile-web/tests/fixtures/host-queue.tsx

@@ -4,6 +4,8 @@ import '@openbitfun/theme-openbitfun/default.css';
 import '@openbitfun/ui/mobile.css';
 import '../../src/styles/index.scss';
 import { createRoot } from 'react-dom/client';
+import { ThinkingBlock } from '../../src/components/ChatTranscript';
+import { MarkdownContent } from '../../src/components/ChatMarkdown';
 import ChatComposerBar from '../../src/components/ChatComposerBar';
 import { MobileHostQueue } from '../../src/components/MobileHostQueue';
 import { useMobileViewport } from '../../src/hooks/useMobileViewport';
@@ -37,7 +39,7 @@ export function mountHostQueueFixture({ count = 1, expanded = true } = {}) {
     }, []);
     return <ThemeProvider><I18nProvider><div className={`chat-page${window.innerWidth >= 900 ? ' chat-page--wide' : ''}`} style={{ '--chat-composer-height': `${height}px` } as React.CSSProperties}>
     <header className="chat-page__header">项目介绍</header>
-    <div className="chat-page__messages"><p>正在检查代码和测试覆盖。</p><p>ExecCommand</p><p>分析当前项目的实现。</p></div>
+    <div className="chat-page__messages"><div className="chat-msg chat-msg--assistant"><ThinkingBlock thinking="检查代码和测试覆盖。" /><div className="chat-msg__assistant-content"><MarkdownContent content={"我先看一下工作区，再继续分析实现。\n\nhttps://example.com/very/long/path/that/should/wrap/without/overflowing/the/mobile/viewport"} /></div></div></div>
     <ChatComposerBar queueContent={<MobileHostQueue queue={queue} onRestore={noop} />}
       cancelling={false} containerRef={ref} expanded={expanded} imageAnalyzing={false} sending={false}
       input="继续检查" inputRef={null} modelControls={null} onActivate={noop} onAttach={noop} onCancel={() => calls.push('stop')}

src/mobile-web/tests/host-dialog-queue-browser.test.mjs

@@ -60,7 +60,7 @@ test('queue stays above the measured composer across phone, keyboard-height and
   const page=await browser.newPage();
   for(const [width,height] of [[320,568],[390,844],[390,420],[768,800],[1200,900]]) {
    await page.setViewport({width,height});
-   await page.goto(server.origin+'/tests/fixtures/host-queue.html?count=8');
+   await page.goto(server.origin+'/tests/fixtures/host-queue.html?count=8&theme='+ (width===768 ? 'light' : 'dark'));
    await page.waitForSelector('.host-message-queue li');
    await page.waitForFunction(()=>{
     const wrap=document.querySelector('.chat-page__input-wrap');
@@ -99,6 +99,21 @@ test('queue stays above the measured composer across phone, keyboard-height and
   await page.goto(server.origin+'/tests/fixtures/host-queue.html?count=2&expanded=false');
   await page.waitForSelector('.host-message-queue li');
   assert.equal(await page.$('.chat-page__input'),null,'queue controls also work alongside the collapsed composer');
+  const geometry=await page.evaluate(()=>{
+    const box=s=>document.querySelector(s).getBoundingClientRect();
+    const composer=box('.chat-page__composer'),stop=box('.chat-page__send-btn.is-stop');
+    const plus=box('.chat-page__composer-leading');
+    const text=box('.chat-msg__assistant-content');
+    const icon=box('.chat-thinking [data-openbitfun-part="leading"]');
+    return {top:stop.top-composer.top,bottom:composer.bottom-stop.bottom,right:composer.right-stop.right,
+      left:plus.left-composer.left,width:stop.width,plusWidth:plus.width,
+      textLeft:text.left+parseFloat(getComputedStyle(document.querySelector('.chat-msg__assistant-content')).paddingLeft),iconLeft:icon.left};
+  });
+  assert.equal(geometry.width,44);
+  assert.equal(geometry.plusWidth,44);
+  for(const edge of ['top','bottom','left']) assert.ok(Math.abs(geometry[edge]-geometry.right)<1,JSON.stringify(geometry));
+  assert.ok(Math.abs(geometry.textLeft-geometry.iconLeft)<1,JSON.stringify(geometry));
+  await page.screenshot({path:'/tmp/mobile-queue-aligned.png',fullPage:true});
   await page.click('[aria-label="排队消息说明"]');
   await page.waitForSelector('.host-message-queue__help');
   await page.click('[aria-label="排队消息说明"]');

src/web-ui/src/flow_chat/utils/turnCompletionNotice.test.ts

@@ -9,6 +9,12 @@ describe('getTurnCompletionNotice', () => {
     } as any)).toBeNull();
   });
 
+  it.each([true, false, undefined])('does not warn on user steering (final response: %s)', (hasFinalResponse) => {
+    expect(getTurnCompletionNotice({
+      status: 'completed', finishReason: 'user_steering', hasFinalResponse,
+    })).toBeNull();
+  });
+
   it('returns null for non-completed turns', () => {
     expect(getTurnCompletionNotice({
       status: 'processing',

src/web-ui/src/flow_chat/utils/turnCompletionNotice.ts

@@ -19,7 +19,7 @@ interface NormalizedTurnCompletionNoticeState {
   hasFinalResponse?: boolean;
 }
 
-const NORMAL_FINISH_REASONS = new Set(['complete']);
+const NORMAL_FINISH_REASONS = new Set(['complete', 'user_steering']);
 
 const TURN_COMPLETION_NOTICE_CONFIG: Record<string, TurnCompletionNoticeConfig> = {
   repeated_tool_failures: {