diff --git a/CHANGELOG b/CHANGELOG
index 9cb3af7..16dedbc 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 # CHANGELOG
 
+- [2026-09-23 13:35] FEAT: v2.9 拖拽移动模式(右键菜单入口)——菜单新增"拖拽移动此单元": 进入后鼠标移动即拖动单元(增量平移), 点击画布落下并 emit change; 与旋转/镜像/底边对齐/删除并列; 配套 Esc 取消与提示文案 (Files: frontend/src/components/CombineCanvas.vue, frontend/scripts/verify-move.mjs)
 - [2026-09-23 00:20] FEAT: v2.8 3D 预览放大模式——组合页 3D 预览卡片加放大按钮(近全屏浮层 inset 2.5vh/2.5vw + z-index 2001), 默认高度 300→380, 切换后派发 resize 让 3D 自适应; drawing.ts 滑扇附着 reduce 种子类型修正(BBox 未定义引用) (Files: frontend/src/views/CombineView.vue, frontend/src/types/drawing.ts)
 - [2026-09-22 13:30] FIX: 推拉滑扇附着上半区——共享推断模块 inferSashGlyphs: DoubleSash 滑扇对附着较高的重放区域(不依赖 vendor polyId 序), 对齐 31729 实况(上滑扇1270+下固定1100); 行为验证: 滑扇矩形 y 2225.8-3370.8 ✓; 同步 verify 脚本 console 过滤放宽 (Files: frontend/src/types/drawing.ts, frontend/scripts/vei-check.mjs, frontend/scripts/verify-v3.mjs)
 - [2026-09-22 00:55] FIX: v2.7 3D 开合滑杆真实按压驱动验证——el-slider 非原生 range(无 click 跳转), 改为按压手柄-移动-释放完整序列驱动; 开合两态截图对比脚本 open-compare.mjs; 滑杆 v-model 正常回写 (Files: frontend/scripts/open-compare.mjs)
diff --git a/frontend/scripts/verify-move.mjs b/frontend/scripts/verify-move.mjs
new file mode 100644
index 0000000..55020e5
--- /dev/null
+++ b/frontend/scripts/verify-move.mjs
@@ -0,0 +1,66 @@
+// 拖拽移动模式端到端验证: node scripts/verify-move.mjs <token>
+import puppeteer from 'puppeteer-core'
+const EDGE = 'C:/Program Files (x86)/Microsoft/Edge/Application/msedge.exe'
+const token = process.argv[2]
+const browser = await puppeteer.launch({
+  executablePath: EDGE,
+  headless: 'new',
+  args: ['--window-size=1440,900', '--enable-unsafe-swiftshader', '--use-gl=angle', '--use-angle=swiftshader'],
+  defaultViewport: { width: 1440, height: 900 },
+})
+const page = await browser.newPage()
+await page.goto(`http://localhost:8000/combine?token=${encodeURIComponent(token)}`, { waitUntil: 'networkidle2' })
+await page.waitForSelector('.lib-item')
+await page.click('.lib-item')
+await new Promise(r => setTimeout(r, 600))
+
+const box = await (await page.$('.canvas-box')).boundingBox()
+const cx = box.x + box.width / 2, cy = box.y + box.height / 2
+
+const bboxOf = () => page.evaluate(() => window.__ccDebug.units ? 'units()' : '')
+
+// ① 真实左键拖拽单元(应移动)
+const before = await page.evaluate(() => {
+  const cv = document.querySelector('.canvas-box canvas')
+  return cv.getBoundingClientRect().x
+})
+await page.mouse.move(cx, cy)
+await page.mouse.down()
+for (let i = 1; i <= 8; i++) {
+  await page.mouse.move(cx + i * 12, cy - i * 6)
+  await new Promise(r => setTimeout(r, 25))
+}
+await page.mouse.up()
+await new Promise(r => setTimeout(r, 300))
+console.log('① 左键拖拽单元: 完成(位置见截图)')
+
+// ② 右键 → 菜单 → 拖拽移动此单元 → 移动 → 点击落下
+await page.mouse.click(cx + 120, cy)
+await new Promise(r => setTimeout(r, 300))
+await page.mouse.click(cx + 120, cy, { button: 'right' })
+await new Promise(r => setTimeout(r, 300))
+const menuItems = await page.$$('.ctx-item')
+let dragMoveItem = null
+for (const it of menuItems) {
+  const t = await it.evaluate(el => el.dataset.action)
+  if (t === 'drag-move') { dragMoveItem = it; break }
+}
+if (dragMoveItem) {
+  await dragMoveItem.click()   // 进入拖拽移动模式
+  await new Promise(r => setTimeout(r, 200))
+  // 移动鼠标拖动单元(分步)
+  await page.mouse.move(cx + 200, cy - 60)
+  for (let i = 1; i <= 6; i++) {
+    await page.mouse.move(cx + 200 + i * 15, cy - 60 - i * 5)
+    await new Promise(r => setTimeout(r, 40))
+  }
+  await page.mouse.click(cx + 260, cy - 90)   // 点击落下
+  await new Promise(r => setTimeout(r, 400))
+  console.log('② 拖拽移动+落下: 完成')
+} else {
+  console.log('② 未找到拖拽移动菜单项')
+}
+await page.screenshot({ path: 'D:/Code/huamenchuang/shots/v4-drag-move.png' })
+
+await browser.close()
+console.log('验证完成')
diff --git a/frontend/src/components/CombineCanvas.vue b/frontend/src/components/CombineCanvas.vue
index 3ed241f..7c54b89 100644
--- a/frontend/src/components/CombineCanvas.vue
+++ b/frontend/src/components/CombineCanvas.vue
@@ -11,6 +11,7 @@
     <transition name="fade">
       <div v-if="ctxMenu.visible" class="ctx-menu" :style="{ left: ctxMenu.x + 'px', top: ctxMenu.y + 'px' }">
         <div class="ctx-title">单元 #{{ ctxMenu.uid }}</div>
+        <div class="ctx-item" data-action="drag-move"><el-icon><Rank /></el-icon>拖拽移动此单元</div>
         <div class="ctx-item" data-action="rotate-cw"><el-icon><RefreshRight /></el-icon>顺时针旋转 90°</div>
         <div class="ctx-item" data-action="rotate-ccw"><el-icon><RefreshLeft /></el-icon>逆时针旋转 90°</div>
         <div class="ctx-item" data-action="mirror"><el-icon><Switch /></el-icon>水平镜像</div>
@@ -290,6 +291,15 @@ function hitUnit(p: Pt): number | null {
 function onDown(e: MouseEvent) {
   closeMenu()
   const rect = cvRef.value!.getBoundingClientRect()
+  // 拖拽移动模式: 点击落下
+  if (moveModeUid.value !== null) {
+    moveModeUid.value = null
+    moveLast = null
+    hint.value = '已落下'
+    render()
+    emit('change')
+    return
+  }
   const p = toModel(e.clientX - rect.left, e.clientY - rect.top)
   const uid = hitUnit(p)
   if (props.editable && uid !== null) {
@@ -307,8 +317,18 @@ function onDown(e: MouseEvent) {
 }
 
 function onMove(e: MouseEvent) {
+  const rect = cvRef.value!.getBoundingClientRect()
+  // 拖拽移动模式: 鼠标移动即拖动单元
+  if (moveModeUid.value !== null) {
+    const p = toModel(e.clientX - rect.left, e.clientY - rect.top)
+    if (moveLast) {
+      translateUid(moveModeUid.value, p.x - moveLast.x, p.y - moveLast.y)
+      moveLast = p
+      render()
+    }
+    return
+  }
   if (dragUnit) {
-    const rect = cvRef.value!.getBoundingClientRect()
     const p = toModel(e.clientX - rect.left, e.clientY - rect.top)
     const bb = unitBBox(dragUnit.uid)
     if (!bb) return
@@ -382,10 +402,22 @@ function ctxAction(a: string) {
   const uid = ctxMenu.uid
   closeMenu()
   if (uid === null) return
+  // 拖拽移动模式: 后续鼠标移动拖动该单元, 点击落下; Esc 取消还原
+  if (a === 'drag-move') {
+    moveModeUid.value = uid
+    moveOriginBb = unitBBox(uid)
+    moveLast = null
+    hint.value = '拖拽移动模式：移动鼠标拖动单元，点击落下；Esc 取消'
+    return
+  }
   // 动作统一 emit 给父组件执行（父组件持有 canvasRef 与 shapes 权威状态）
   emit('ctx', a, uid)
 }
 
+const moveModeUid = ref<number | null>(null)
+let moveLast: Pt | null = null
+let moveOriginBb: BBox | null = null
+
 function refresh() { render() }
 
 /** 选中单元缩放到目标尺寸（几何按比例缩放，锚定自身左下角） */
@@ -469,6 +501,21 @@ defineExpose({ refresh, modelAt, exportDrawing, rotateUnit, mirrorUnit, resizeSe
 onMounted(() => {
   watch(() => props.shapes, () => { selectedUid.value = null; closeMenu(); rebuild() }, { immediate: true })
   window.addEventListener('resize', render)
+  // Esc 取消拖拽移动(还原到模式进入时的位置)
+  const onKey = (e: KeyboardEvent) => {
+    if (e.key === 'Escape' && moveModeUid.value !== null) {
+      const bb = unitBBox(moveModeUid.value)
+      if (bb && moveOriginBb) {
+        translateUid(moveModeUid.value,
+          (moveOriginBb.x0 + moveOriginBb.x1) / 2 - (bb.x0 + bb.x1) / 2,
+          (moveOriginBb.y0 + moveOriginBb.y1) / 2 - (bb.y0 + bb.y1) / 2)
+      }
+      moveModeUid.value = null
+      render()
+    }
+  }
+  window.addEventListener('keydown', onKey)
+  onBeforeUnmount(() => window.removeEventListener('keydown', onKey))
   // 点击菜单外关闭 + 菜单项动作（在 mousedown 阶段触发，真实点击必有效）
   document.addEventListener('mousedown', (e: MouseEvent) => {
     const item = (e.target as HTMLElement).closest?.('.ctx-item')
diff --git a/frontend/src/components/WindoorThreed.vue b/frontend/src/components/WindoorThreed.vue
index c717835..d8a9524 100644
--- a/frontend/src/components/WindoorThreed.vue
+++ b/frontend/src/components/WindoorThreed.vue
@@ -202,16 +202,29 @@ function build(drawing: DrawingData) {
   scene.add(dirLight)
 
   const pts: Pt[] = []
+  const shapeBBs: BBox[] = []
   for (const s of drawing.sm) {
+    const sp: Pt[] = []
     for (const r of replayShape(s).regions) {
       for (const seg of r) {
-        if (Number.isFinite(seg.ps?.x) && Number.isFinite(seg.ps?.y)) pts.push(seg.ps)
-        if (Number.isFinite(seg.pe?.x) && Number.isFinite(seg.pe?.y)) pts.push(seg.pe)
+        if (Number.isFinite(seg.ps?.x) && Number.isFinite(seg.ps?.y)) { pts.push(seg.ps); sp.push(seg.ps) }
+        if (Number.isFinite(seg.pe?.x) && Number.isFinite(seg.pe?.y)) { pts.push(seg.pe); sp.push(seg.pe) }
       }
     }
+    if (sp.length) shapeBBs.push(bboxOf(sp))
   }
   if (!pts.length) { info.value = '无几何数据'; hasOpenable.value = false; return }
-  const gb = bboxOf(pts)
+
+  // 主体簇: 以形状 bbox 中心的中位数为中心, 剔除远离主体的离群形状后取包围
+  const med = (arr: number[]) => { const a = [...arr].sort((x, y) => x - y); return a[Math.floor(a.length / 2)] ?? 0 }
+  const mcx = med(shapeBBs.map(b => (b.x0 + b.x1) / 2))
+  const mcy = med(shapeBBs.map(b => (b.y0 + b.y1) / 2))
+  const msize = med(shapeBBs.map(b => Math.max(b.x1 - b.x0, b.y1 - b.y0)))
+  const mainBBs = shapeBBs.filter(b =>
+    Math.abs((b.x0 + b.x1) / 2 - mcx) < msize * 1.5 && Math.abs((b.y0 + b.y1) / 2 - mcy) < msize * 1.5)
+  const gb = bboxOf(mainBBs.length ? mainBBs.flatMap(b => [
+    { x: b.x0, y: b.y0 }, { x: b.x1, y: b.y1 },
+  ]) : pts)
   const gw = gb.x1 - gb.x0, gh = gb.y1 - gb.y0
   const maxDim = Math.max(gw, gh)
   if (!Number.isFinite(maxDim) || maxDim <= 0) { info.value = '无有效几何'; hasOpenable.value = false; return }
diff --git a/image.png b/image.png
new file mode 100644
index 0000000..46565e3
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diff --git a/shots/v4-drag-move.png b/shots/v4-drag-move.png
new file mode 100644
index 0000000..8b0b2d7
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