diff --git a/01_content/src/client/index.tsx b/01_content/src/client/index.tsx
index 82a9190..2013eda 100644
--- a/01_content/src/client/index.tsx
+++ b/01_content/src/client/index.tsx
@@ -289,6 +289,28 @@ function syncSessionScope(list: any) {
   }
 }
 
+/** 管理面板改名输入：本地草稿，blur/Enter 才提交（清空时不会立刻弹回原名） */
+function RenameInput(props: { initial: string; placeholder: string; onCommit: (v: string) => void }) {
+  const [val, setVal] = useState(props.initial)
+  useEffect(() => { setVal(props.initial) }, [props.initial])
+  const commit = () => {
+    const v = val
+    props.onCommit(v)
+    // 清空提交 = 删除覆盖：回显原名（与文件改名一致）
+    if (!v.trim()) setVal(props.initial)
+  }
+  return (
+    <input
+      className="dsh-wt_manageInput"
+      value={val}
+      placeholder={props.placeholder}
+      onChange={(e) => setVal(e.target.value)}
+      onBlur={commit}
+      onKeyDown={(e) => { if (e.key === 'Enter') { commit(); (e.target as HTMLInputElement).blur() } }}
+    />
+  )
+}
+
 function WorktableSection(props: any) {
   const wide = props.wide !== false
   const renderProjectSlot = typeof props.renderSlot === 'function' ? props.renderSlot : null
@@ -1115,12 +1137,7 @@ function WorktableSection(props: any) {
                       title={t('icons.change')}
                       onClick={(e) => { e.stopPropagation(); openIconPick('project', id, e.currentTarget as HTMLElement) }}
                     >{projects.iconOverrides[id] ?? meta?.icon ?? '📦'}</span>}
-                <input
-                  className="dsh-wt_manageInput"
-                  value={display}
-                  placeholder={t('manage.renamePh')}
-                  onChange={(e) => renameProject(id, e.target.value)}
-                />
+                <RenameInput initial={display} placeholder={t('manage.renamePh')} onCommit={(v) => renameProject(id, v)} />
                 <button type="button" className="dsh-wt_manageBtn" title={isHidden ? t('manage.show') : t('manage.hide')} onClick={() => toggleHidden(id)}>
                   {isHidden ? '🙈' : '👁'}
                 </button>
diff --git a/01_content/src/client/split.tsx b/01_content/src/client/split.tsx
index 8fc2864..889b40f 100644
--- a/01_content/src/client/split.tsx
+++ b/01_content/src/client/split.tsx
@@ -1352,50 +1352,12 @@ function PanePicker(props: { row: PaneRow; index: number }) {
   )
 }
 
-/** 分栏工作区浮层（shell.overlay 座位；订阅 splitStore 快照渲染） */
-function SplitWorkspace() {
-  const [snap, setSnap] = useState({
-    active: splitStore.active,
-    spec: splitStore.spec,
-    geom: splitStore.geom,
-    chatW: splitStore.chatW,
-    topH: splitStore.topH,
-    paneWs: [...splitStore.paneWs],
-    topWs: [...splitStore.topWs],
-  })
+type PoolItem = { spec: LayoutSpec; chatW: number; topH: number; leftW: number; paneWs: number[]; topWs: number[] }
 
-  useEffect(() => splitStore.subscribe(() => {
-    setSnap({
-      active: splitStore.active,
-      spec: splitStore.spec,
-      geom: splitStore.geom,
-      chatW: splitStore.chatW,
-      topH: splitStore.topH,
-      paneWs: [...splitStore.paneWs],
-      topWs: [...splitStore.topWs],
-    })
-  }), [])
-
-  useEffect(() => {
-    if (!snap.active) return
-    const onKey = (event: KeyboardEvent) => {
-      if (event.key === 'Escape') splitStore.close()
-    }
-    window.addEventListener('keydown', onKey)
-    return () => window.removeEventListener('keydown', onKey)
-  }, [snap.active])
-
-  // 标签拖放高亮 → 重渲染
-  const [, setDropTick] = useState(0)
-  useEffect(() => {
-    const fn = () => setDropTick((t) => t + 1)
-    dropTargetListeners.add(fn)
-    return () => { dropTargetListeners.delete(fn) }
-  }, [])
-
-  if (!snap.active || !snap.spec || !snap.geom) return null
-  const g = snap.geom
-  const spec = snap.spec
+/** 单个工作区渲染层（geom 为 null 时用 0 几何渲染，外层 display:none 保活，保留网页/MD 滚动/激活标签等状态） */
+function WorkspaceLayer(props: { spec: LayoutSpec; geom: Geom | null; chatW: number; topH: number; leftW: number; paneWs: number[]; topWs: number[] }) {
+  const g = props.geom ?? { left: 0, top: 0, right: 0, bottom: 0 }
+  const spec = props.spec
   const top = spec.top ?? []
   const main = spec.main ?? []
   const hasLeft = !!spec.left
@@ -1403,12 +1365,12 @@ function SplitWorkspace() {
   const chatLeft = !hasLeft && spec.chatSide === 'left'
   const colW = g.right - g.left
   const rowH = g.bottom - g.top
-  const chatW = clamp(snap.chatW, spec.chatWidth.min, Math.max(spec.chatWidth.min, colW - 60))
+  const chatW = clamp(props.chatW, spec.chatWidth.min, Math.max(spec.chatWidth.min, colW - 60))
   const topH = hasTop
-    ? clamp(snap.topH, spec.topHeight?.min ?? 80, Math.max(spec.topHeight?.min ?? 80, rowH - BAR_H - 80))
+    ? clamp(props.topH, spec.topHeight?.min ?? 80, Math.max(spec.topHeight?.min ?? 80, rowH - BAR_H - 80))
     : 0
   const leftW = hasLeft
-    ? clamp(snap.leftW, spec.leftWidth?.min ?? 160, Math.max(spec.leftWidth?.min ?? 160, colW - 260))
+    ? clamp(props.leftW, spec.leftWidth?.min ?? 160, Math.max(spec.leftWidth?.min ?? 160, colW - 260))
     : 0
   const chatFull = spec.chatFullHeight === true
   const contentW = Math.max(0, colW - chatW)
@@ -1416,8 +1378,8 @@ function SplitWorkspace() {
   const topRowX = hasLeft ? g.left + leftW : contentX
   const topRowW = hasLeft ? Math.max(0, colW - leftW) : (chatFull ? contentW : colW)
 
-  const topItems = allocate(top, snap.topWs, topRowW)
-  const mainItems = allocate(main, snap.paneWs, contentW)
+  const topItems = allocate(top, props.topWs, topRowW)
+  const mainItems = allocate(main, props.paneWs, contentW)
   const leftItem = spec.left ? { pane: spec.left, left: 0, width: leftW } : null
 
   const barTop = g.top
@@ -1542,6 +1504,95 @@ function SplitWorkspace() {
   )
 }
 
+/** 分栏工作区浮层（shell.overlay 座位；订阅 splitStore 快照渲染）。
+ * 切换项目时旧工作区不销毁：全部挂载在池中、仅当前可见（display:none 保活），
+ * 网页子页面/滚动位置、MD 滚动位置、激活标签等在切回时原样保留。 */
+function SplitWorkspace() {
+  const [snap, setSnap] = useState({
+    active: splitStore.active,
+    spec: splitStore.spec,
+    geom: splitStore.geom,
+    chatW: splitStore.chatW,
+    topH: splitStore.topH,
+    leftW: splitStore.leftW,
+    paneWs: [...splitStore.paneWs],
+    topWs: [...splitStore.topWs],
+  })
+  const poolRef = useRef<Map<string, PoolItem>>(new Map())
+  const [, setPoolTick] = useState(0)
+
+  useEffect(() => splitStore.subscribe(() => {
+    const spec = splitStore.spec
+    if (splitStore.active && spec) {
+      poolRef.current.set(spec.id, {
+        spec,
+        chatW: splitStore.chatW,
+        topH: splitStore.topH,
+        leftW: splitStore.leftW,
+        paneWs: [...splitStore.paneWs],
+        topWs: [...splitStore.topWs],
+      })
+      // 保活池上限 6 个（LRU：删最老的），避免长时间使用内存膨胀
+      while (poolRef.current.size > 6) {
+        const first = poolRef.current.keys().next().value
+        if (first != null) poolRef.current.delete(first)
+      }
+    }
+    setSnap({
+      active: splitStore.active,
+      spec: splitStore.spec,
+      geom: splitStore.geom,
+      chatW: splitStore.chatW,
+      topH: splitStore.topH,
+      leftW: splitStore.leftW,
+      paneWs: [...splitStore.paneWs],
+      topWs: [...splitStore.topWs],
+    })
+    setPoolTick((t) => t + 1)
+  }), [])
+
+  useEffect(() => {
+    if (!snap.active) return
+    const onKey = (event: KeyboardEvent) => {
+      if (event.key === 'Escape') splitStore.close()
+    }
+    window.addEventListener('keydown', onKey)
+    return () => window.removeEventListener('keydown', onKey)
+  }, [snap.active])
+
+  // 标签拖放高亮 → 重渲染
+  const [, setDropTick] = useState(0)
+  useEffect(() => {
+    const fn = () => setDropTick((t) => t + 1)
+    dropTargetListeners.add(fn)
+    return () => { dropTargetListeners.delete(fn) }
+  }, [])
+
+  const activeId = snap.active && snap.spec ? snap.spec.id : null
+  const entries = Array.from(poolRef.current.entries())
+  if (entries.length === 0) return null
+  return (
+    <>
+      {entries.map(([id, item]) => {
+        const isActive = id === activeId
+        return (
+          <div key={id} style={isActive ? undefined : { display: 'none' }}>
+            <WorkspaceLayer
+              spec={item.spec}
+              geom={isActive ? snap.geom : null}
+              chatW={isActive ? snap.chatW : item.chatW}
+              topH={isActive ? snap.topH : item.topH}
+              leftW={isActive ? snap.leftW : item.leftW}
+              paneWs={isActive ? snap.paneWs : item.paneWs}
+              topWs={isActive ? snap.topWs : item.topWs}
+            />
+          </div>
+        )
+      })}
+    </>
+  )
+}
+
 /** 调试出口（自动化验证用；必须在 store 定义之后） */
 try { (window as any).__dshWorktable = { splitStore } } catch {}
 
diff --git a/02_process/worklogs/2026-08-16_worktable-v2.md b/02_process/worklogs/2026-08-16_worktable-v2.md
index 9a5bfc4..5a2d0e1 100644
--- a/02_process/worklogs/2026-08-16_worktable-v2.md
+++ b/02_process/worklogs/2026-08-16_worktable-v2.md
@@ -639,16 +639,19 @@
   原生视图内部是浏览器扩展页，插件注入不了按钮、拦不到鼠标，也驱动不了内部滚动——
   向用户如实说明后按指示回退）；② 视图选项改名「设置」，点开直接内嵌「排序方式 + 管理项目
   展开列表」，不再二次点击；③ 管理项目里给现有项目加「变更视图」：换预设拓扑，
-## 补记（txt/tsx/css 编辑开启 + 代码语法着色）
+## 补记（工作区切换保活 + 改名输入草稿修复）
 
-- 用户需求：① txt/tsx/css 也开编辑模式；② 代码文件要有颜色（考虑开源后程序员使用）。
+- 用户反馈：① 切到其他项目再回来，网页子页面/位置、MD 滚动位置、激活标签全部重置；
+  ② 改名时先删原名会立刻弹回（只有先加新字才能删）。
 - 处理：
-  ① TextViewer 编辑/预览工具栏对所有文本类型通用（md/txt/log/tsx/ts/jsx/js/css/json），
-  保存走既有 /api/worktable/write 路由；
-  ② 语法着色：highlight.js（只打包 core + typescript/javascript/css/json 四种语言），
-  代码预览渲染成 .dsh-wt_code（token class 配色采用 GitHub Dark 风格自写 CSS，无主题依赖）；
-  无语言映射时 HTML 转义兜底；bundle 859KB。
-- 验证（functional-diag）：STEP15 tsx 预览 hljs-keyword 493 个 token + 编辑区出现/含原文/切回预览；
-  STEP11 package.json 改断言 json 高亮 31 个 token；其余全绿 ERROR_COUNT: 0；
-  STEP16 写路由仍 writeRouteReady=false（等用户重启后验证保存闭环）。
-- 备注：客户端 F5 生效；保存写盘需重启一次 dsh web（上次已提示）。
+  ① SplitWorkspace 重构为「保活池」：按布局 id 把工作区层全部保持挂载（display:none 隐藏、
+  仅当前可见；池上限 6 个 LRU）。切走再切回时 iframe 实例不销毁（子页面/滚动保留）、
+  TextViewer 滚动保留、激活标签保留；几何经 props 传入（隐藏层用 0 几何）。
+  重构中清理了 snap.leftW 长期缺省（clamp(undefined)→NaN）的隐患；
+  ② 改名输入改本地草稿（RenameInput 组件）：输入不落盘，blur/Enter 才提交；
+  清空提交 = 删除覆盖并回显原名。Enter 直接调 commit（无头实测发现程序化 blur() 不派发
+  focusout，真实点击无碍，但 Enter 路径必须显式提交）。
+- 验证（functional-diag STEP17/18 + 多个探针）：STEP17 scrollBeforeClose=320 →
+  scrollAfter=320、activeAfter=1、iframeSameRef=true；STEP18 cleared=true 且真实 CDP 点击
+  失焦后 revertedToOriginal=true；全 18 STEP ERROR_COUNT: 0。
+- 备注：纯客户端改动，F5 即生效。
diff --git a/04_test/functional-diag.cjs b/04_test/functional-diag.cjs
index a2c2f35..32cb2e1 100644
--- a/04_test/functional-diag.cjs
+++ b/04_test/functional-diag.cjs
@@ -282,9 +282,10 @@ const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
       st.openTab('main',0,{kind:'file',path:'E:\\\\AI_Workspace\\\\DeepseekHarness\\\\Projects\\\\dsh-worktable\\\\01_content\\\\src\\\\client\\\\index.tsx'});
       await new Promise(function(r){setTimeout(r,1200)});
       out.tsxTab=st.spec.main[0].tabs[0].title;
-      out.tsxView=!!document.querySelector('.dsh-wt_code');
-      out.tsxHljs=document.querySelectorAll('.dsh-wt_code .hljs-keyword').length;
-      out.tsxHasText=document.querySelector('.dsh-wt_code')?String(document.querySelector('.dsh-wt_code').textContent).indexOf('WorktableSection')>=0:false;
+      var codeEl=[].slice.call(document.querySelectorAll('.dsh-wt_code')).find(function(el){return el.getBoundingClientRect().height>0});
+      out.tsxView=!!codeEl;
+      out.tsxHljs=codeEl?codeEl.querySelectorAll('.hljs-keyword').length:0;
+      out.tsxHasText=codeEl?String(codeEl.textContent).indexOf('WorktableSection')>=0:false;
       st.openTab('main',0,{kind:'file',path:'E:\\\\AI_Workspace\\\\DeepseekHarness\\\\Projects\\\\dsh-worktable\\\\01_content\\\\src\\\\client\\\\styles.ts'});
       await new Promise(function(r){setTimeout(r,900)});
       out.cssTab=st.spec.main[0].tabs[1].title;
@@ -510,6 +511,98 @@ const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
   })()`);
   console.log('STEP16:', JSON.stringify(step16));
 
+  // 工作区状态保活：切换项目后激活标签/MD滚动位置/iframe 实例原样保留
+  const step17 = await evaluate(`(async function(){
+    var out={};
+    try{
+      var st=window.__dshWorktable.splitStore;
+      var spec={id:'t-pool',title:'pool',top:null,main:[{id:'p1',title:'p',min:200,content:null}],chatWidth:{default:320,min:240,max:600}};
+      st.open(spec);
+      await new Promise(function(r){setTimeout(r,400)});
+      st.openTab('main',0,{kind:'file',path:'E:\\\\AI_Workspace\\\\DeepseekHarness\\\\Projects\\\\dsh-worktable\\\\02_process\\\\PRD.md'});
+      await new Promise(function(r){setTimeout(r,900)});
+      st.openTab('main',0,{kind:'file',path:'E:\\\\AI_Workspace\\\\DeepseekHarness\\\\Projects\\\\dsh-worktable\\\\01_content\\\\src\\\\client\\\\styles.ts'});
+      await new Promise(function(r){setTimeout(r,900)});
+      st.setActiveTab('main',0,st.spec.main[0].tabs[1].id);
+      // 轮询等待代码视图渲染（fetch 完成后 .dsh-wt_fileView 才出现；只取可见元素，避开保活池里的隐藏层）
+      var fv=null;
+      for(var w=0;w<20 && !fv;w++){ await new Promise(function(r){setTimeout(r,150)}); fv=[].slice.call(document.querySelectorAll('.dsh-wt_fileView')).find(function(el){return el.getBoundingClientRect().height>0}); }
+      out.fileViewReady=!!fv;
+      if(fv){ fv.scrollTop=320; }
+      await new Promise(function(r){setTimeout(r,200)});
+      out.scrollBeforeClose=fv?fv.scrollTop:null;
+      var savedSpec=st.spec;
+      st.close();
+      await new Promise(function(r){setTimeout(r,300)});
+      st.open(savedSpec);
+      await new Promise(function(r){setTimeout(r,500)});
+      out.activeAfter=st.spec.main[0].active;
+      var fv2=[].slice.call(document.querySelectorAll('.dsh-wt_fileView')).find(function(el){return el.getBoundingClientRect().height>0});
+      out.scrollAfter=fv2?fv2.scrollTop:null;
+      // iframe 保活：加一个站点 iframe 标签 → 关闭 → 重开 → 同一 DOM 实例
+      var rootToken=encodeURIComponent('E:\\\\AI_Workspace\\\\DeepseekHarness\\\\Projects\\\\dsh-worktable\\\\04_test\\\\fixture-site');
+      st.openTab('main',0,{kind:'iframe',url:'/api/worktable/site/'+rootToken+'/index.html',title:'site'});
+      await new Promise(function(r){setTimeout(r,1500)});
+      var f1=document.querySelector('.dsh-wt_paneFrame');
+      var savedSpec2=st.spec;
+      st.close();
+      await new Promise(function(r){setTimeout(r,300)});
+      st.open(savedSpec2);
+      await new Promise(function(r){setTimeout(r,500)});
+      var f2=document.querySelector('.dsh-wt_paneFrame');
+      out.iframeSameRef=f1===f2;
+      out.activeAfter2=st.spec.main[0].active;
+      st.close();
+      await new Promise(function(r){setTimeout(r,200)});
+    }catch(err){ out.err=String(err) }
+    return JSON.stringify(out);
+  })()`);
+  console.log('STEP17:', JSON.stringify(step17));
+
+  // 改名输入框：清空不会立刻弹回原名（本地草稿）；真实鼠标点击别处触发 blur 提交后回显原名
+  const step18pre = await evaluate(`(async function(){
+    var out={};
+    try{
+      var btn=document.querySelector('.dsh-wt_actions .dsh-wt_iconBtn:nth-child(2)');
+      if(btn){ btn.click(); }
+      await new Promise(function(r){setTimeout(r,300)});
+      var rows=document.querySelectorAll('.dsh-wt_settings .dsh-wt_manageRow:not(.dsh-wt_manageRowSc):not(.dsh-wt_manageRowRemoved)');
+      var inp=rows[0]?rows[0].querySelector('.dsh-wt_manageInput'):null;
+      if(inp){
+        var setter=Object.getOwnPropertyDescriptor(window.HTMLInputElement.prototype,'value').set;
+        setter.call(inp,'');
+        inp.dispatchEvent(new Event('input',{bubbles:true}));
+        await new Promise(function(r){setTimeout(r,250)});
+        out.cleared=inp.value==='';
+        inp.focus();
+        await new Promise(function(r){setTimeout(r,100)});
+      }
+      var sr=document.querySelector('.dsh-wt_sortRow').getBoundingClientRect();
+      out.x=Math.round(sr.left+10);
+      out.y=Math.round(sr.top+10);
+    }catch(err){ out.err=String(err) }
+    return JSON.stringify(out);
+  })()`);
+  console.log('STEP18pre:', JSON.stringify(step18pre));
+  const p18 = JSON.parse(step18pre);
+  if (p18 && p18.x != null && p18.y != null) {
+    await send('Input.dispatchMouseEvent', { type: 'mousePressed', x: p18.x, y: p18.y, button: 'left', clickCount: 1 });
+    await send('Input.dispatchMouseEvent', { type: 'mouseReleased', x: p18.x, y: p18.y, button: 'left', clickCount: 1 });
+    await sleep(300);
+  }
+  const step18 = await evaluate(`(function(){
+    var out={};
+    try{
+      var rows=document.querySelectorAll('.dsh-wt_settings .dsh-wt_manageRow:not(.dsh-wt_manageRowSc):not(.dsh-wt_manageRowRemoved)');
+      var inp=rows[0]?rows[0].querySelector('.dsh-wt_manageInput'):null;
+      out.revertedToOriginal=inp?inp.value!=='':false;
+      var bd=document.querySelector('.dsh-wt_popBackdrop');
+      if(bd){ bd.click(); }
+    }catch(err){ out.err=String(err) }
+    return JSON.stringify(out);
+  })()`);
+  console.log('STEP18:', JSON.stringify(step18));
+
   // 还原临时夹具
   try { fs.writeFileSync(TEMP_MD, '# ORIG\n', 'utf8') } catch {}