diff --git a/.gitignore b/.gitignore
index df1bc09..ce3c3a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,7 @@ EasyView-*.apk
 *.local
 .DS_Store
 Thumbs.db
+tools/out/
+
+# 本地测试用图纸（含客户资料，绝不入库）
+testfile/
diff --git a/package.json b/package.json
index 9eaac1e..0c46251 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "phone-viewer-app",
   "private": true,
-  "version": "0.5.0",
+  "version": "0.6.0",
   "type": "module",
   "license": "AGPL-3.0-or-later",
   "description": "Mobile/tablet all-in-one viewer: DWG (model & layout space) + PDF/EPUB/XPS/CBZ/images",
diff --git a/scripts/build-apk.mjs b/scripts/build-apk.mjs
index 0563ef2..332962b 100644
--- a/scripts/build-apk.mjs
+++ b/scripts/build-apk.mjs
@@ -99,7 +99,7 @@ const kotlinStdlib = fs
 if (!kotlinStdlib) throw new Error('kotlin-stdlib not found in Gradle lib')
 
 const appVersion = JSON.parse(fs.readFileSync(path.join(root, 'package.json'), 'utf8')).version
-const versionCode = Number(process.env.APP_VERSION_CODE || 7)
+const versionCode = Number(process.env.APP_VERSION_CODE || 8)
 
 const env = {
   ...process.env,
diff --git a/scripts/probe-app.mjs b/scripts/probe-app.mjs
new file mode 100644
index 0000000..d34674f
--- /dev/null
+++ b/scripts/probe-app.mjs
@@ -0,0 +1,135 @@
+#!/usr/bin/env node
+// 端到端检查真实 App（index.html → 打开文件 → 渲染 → 视图面板），输出状态文本与截图。
+// 用法：node scripts/probe-app.mjs [文件 ...]
+import fs from 'node:fs'
+import path from 'node:path'
+import { spawn } from 'node:child_process'
+import { chromium } from 'playwright-core'
+
+const root = process.cwd()
+const ven = path.resolve(root, '..', 'ven')
+const outDir = path.join(root, 'tools', 'out')
+const port = Number(process.env.PROBE_PORT || 5199)
+fs.mkdirSync(outDir, { recursive: true })
+
+const SUPPORTED = /\.(dwg|dxf|pdf|epub|xps|oxps|cbz|png|jpe?g|gif|bmp)$/i
+let files = process.argv.slice(2).filter((a) => SUPPORTED.test(a))
+if (!files.length) {
+  const dir = path.join(root, 'testfile')
+  files = fs.readdirSync(dir).filter((n) => SUPPORTED.test(n)).map((n) => path.join('testfile', n))
+}
+
+const chrome = [process.env.CHROME_PATH, path.join(ven, 'chrome-for-testing', 'chrome-linux64', 'chrome')].find(
+  (p) => p && fs.existsSync(p)
+)
+
+const vite = spawn(
+  process.execPath,
+  [path.join(root, 'node_modules', 'vite', 'bin', 'vite.js'), '--port', String(port), '--strictPort', '--host', '127.0.0.1'],
+  { cwd: root, stdio: 'ignore' }
+)
+await new Promise((r) => setTimeout(r, 3000))
+
+const browser = await chromium.launch({
+  executablePath: chrome,
+  args: [
+    '--no-sandbox',
+    '--use-gl=angle',
+    '--use-angle=swiftshader',
+    '--enable-unsafe-swiftshader',
+    '--disable-dev-shm-usage',
+    '--js-flags=--max-old-space-size=4096'
+  ]
+})
+
+const report = []
+try {
+  for (const file of files) {
+    const abs = path.resolve(root, file)
+    const label = path.basename(abs)
+    const page = await browser.newPage({ viewport: { width: 1100, height: 860 }, deviceScaleFactor: 1 })
+    const errors = []
+    page.on('pageerror', (e) => errors.push(String(e.message).slice(0, 200)))
+    await page.goto(`http://127.0.0.1:${port}/index.html`, { waitUntil: 'load' })
+    if (process.env.PROBE_NO_ANIM === '1') {
+      await page.addStyleTag({ content: '*{animation:none!important;transition:none!important;backdrop-filter:none!important}' })
+    }
+    const t0 = Date.now()
+
+    await page.setInputFiles('input[type=file]', abs)
+    let status = ''
+    try {
+      await page.waitForFunction(
+        () => {
+          const el = document.querySelector('.viewer-status')
+          const text = el?.textContent || ''
+          return text.includes('实体')
+        },
+        null,
+        { timeout: 180000 }
+      )
+      status = (await page.textContent('.viewer-status')) || ''
+    } catch {
+      status = `(超时) ${(await page.textContent('.viewer-status').catch(() => '')) || ''}`
+    }
+    const elapsed = Date.now() - t0
+    await page.waitForTimeout(800)
+
+    const progress = await page.evaluate(() => window.__progress || null)
+    if (progress) console.log('  worker 进度:', progress.map((p) => `${p.ms}ms/${p.phase}`).join(' '))
+    const timings = await page.evaluate(() => window.__loadTimings || null)
+    if (timings) console.log('  阶段耗时:', JSON.stringify(timings))
+    const shot = path.join(outDir, `app-${label.replace(/[^\w.\u4e00-\u9fa5-]/g, '_')}.png`)
+    await page.screenshot({ path: shot })
+
+    // 打开“视图与图层”面板，检查视图列表与诊断信息
+    let panel = ''
+    try {
+      await page.click('[data-action="layers"]', { timeout: 5000 })
+      await page.waitForTimeout(500)
+      const sheetShot = shot.replace(/\.png$/, '-panel.png')
+      await page.screenshot({ path: sheetShot })
+      panel = (await page.textContent('.sheet').catch(() => '')) || ''
+    } catch (error) {
+      panel = `面板打开失败: ${error.message.slice(0, 80)}`
+    }
+
+    // 点第一个“游离块”视图，确认它确实是一张能看的图纸
+    let viewShot = ''
+    try {
+      const rows = await page.$$('.view-row')
+      if (rows.length > 1) {
+        await rows[1].click()
+        await page.waitForTimeout(1200)
+        viewShot = shot.replace(/\.png$/, '-view1.png')
+        await page.screenshot({ path: viewShot })
+      }
+    } catch {}
+
+    console.log(`\n=== ${label} ===`)
+    console.log(`  打开+渲染墙钟 ${elapsed}ms`)
+    console.log(`  状态栏: ${status.trim()}`)
+    const views = panel.match(/[MLB][^\n]{0,60}实体/g)?.slice(0, 6) ?? []
+    if (views.length) console.log(`  视图列表: ${views.map((v) => v.replace(/\s+/g, ' ')).join(' | ')}`)
+    const diag = panel.match(/渲染提示[^\n]{0,160}/)?.[0]
+    if (diag) console.log(`  诊断: ${diag.replace(/\s+/g, ' ')}`)
+    if (errors.length) console.log(`  页面错误: ${errors.slice(0, 2).join(' | ')}`)
+    report.push({
+      file: label,
+      elapsed,
+      status: status.trim(),
+      views,
+      diag,
+      errors,
+      screenshot: path.relative(root, shot),
+      viewScreenshot: viewShot ? path.relative(root, viewShot) : undefined
+    })
+    await page.close()
+  }
+} finally {
+  await browser.close()
+  vite.kill('SIGTERM')
+}
+
+fs.writeFileSync(path.join(outDir, 'app-report.json'), JSON.stringify(report, null, 2))
+setTimeout(() => process.exit(0), 200)
diff --git a/scripts/probe-dwg.mjs b/scripts/probe-dwg.mjs
new file mode 100644
index 0000000..baeda0e
--- /dev/null
+++ b/scripts/probe-dwg.mjs
@@ -0,0 +1,184 @@
+#!/usr/bin/env node
+// DWG 渲染基准 / 漏渲染诊断探针
+//
+// 用法：node scripts/probe-dwg.mjs [--out tools/out] [文件1.dwg 文件2.dwg ...]
+//   - 默认扫描项目根目录下的 *.dwg / *.DWG
+//   - 启动 vite 开发服务器 + 无头 Chromium（WebGL/SwiftShader）
+//   - 输出解析耗时、首帧构建耗时、实体/图层/块/布局/代理图形统计、缺失引用、
+//     平移缩放耗时，并把每个图纸的截图写到 tools/out/
+import fs from 'node:fs'
+import path from 'node:path'
+import { spawn } from 'node:child_process'
+import { chromium } from 'playwright-core'
+
+const root = process.cwd()
+const ven = path.resolve(root, '..', 'ven')
+const outDir = path.join(root, 'tools', 'out')
+const port = Number(process.env.PROBE_PORT || 5199)
+
+const args = process.argv.slice(2)
+const outFlag = args.indexOf('--out')
+if (outFlag >= 0) args.splice(outFlag, 2)
+let files = args.filter((a) => a.toLowerCase().endsWith('.dwg'))
+if (!files.length) {
+  const dirs = ['testfile', '.'].map((d) => path.join(root, d)).filter((d) => fs.existsSync(d))
+  for (const dir of dirs) {
+    for (const name of fs.readdirSync(dir)) {
+      if (name.toLowerCase().endsWith('.dwg')) files.push(path.join(path.basename(dir), name))
+    }
+  }
+}
+if (!files.length) {
+  console.error('没有找到 DWG 文件')
+  process.exit(1)
+}
+
+fs.mkdirSync(outDir, { recursive: true })
+
+function chromePath() {
+  const candidates = [
+    process.env.CHROME_PATH,
+    path.join(ven, 'chrome-for-testing', 'chrome-linux64', 'chrome'),
+    '/usr/bin/google-chrome',
+    '/usr/bin/chromium'
+  ].filter(Boolean)
+  const hit = candidates.find((p) => {
+    try {
+      return fs.statSync(p).isFile()
+    } catch {
+      return false
+    }
+  })
+  if (!hit) throw new Error('找不到 Chrome/Chromium，可设置 CHROME_PATH')
+  return hit
+}
+
+function startVite() {
+  const vite = path.join(root, 'node_modules', 'vite', 'bin', 'vite.js')
+  const child = spawn(process.execPath, [vite, '--port', String(port), '--strictPort', '--host', '127.0.0.1'], {
+    cwd: root,
+    stdio: ['ignore', 'pipe', 'pipe']
+  })
+  const ready = new Promise((resolve, reject) => {
+    const timer = setTimeout(() => reject(new Error('vite 启动超时')), 30000)
+    const onData = (buf) => {
+      if (/Local:.*http/.test(String(buf))) {
+        clearTimeout(timer)
+        resolve()
+      }
+    }
+    child.stdout.on('data', onData)
+    child.stderr.on('data', (b) => process.env.PROBE_DEBUG && process.stderr.write(b))
+    child.on('exit', (code) => reject(new Error(`vite 退出：${code}`)))
+  })
+  return { child, ready }
+}
+
+const bytes = (n) => `${(n / 1048576).toFixed(1)} MB`
+
+const { child: viteChild, ready } = startVite()
+await ready
+
+const browser = await chromium.launch({
+  executablePath: chromePath(),
+  args: [
+    '--no-sandbox',
+    '--use-gl=angle',
+    '--use-angle=swiftshader',
+    '--enable-unsafe-swiftshader',
+    '--disable-dev-shm-usage',
+    '--js-flags=--max-old-space-size=4096'
+  ]
+})
+
+const results = []
+try {
+  for (const file of files) {
+    const abs = path.resolve(root, file)
+    const label = path.basename(abs)
+    if (!fs.existsSync(abs)) {
+      console.error(`跳过（不存在）：${label}`)
+      continue
+    }
+    const page = await browser.newPage({ viewport: { width: 1280, height: 900 }, deviceScaleFactor: 1 })
+    const logs = []
+    page.on('console', (msg) => {
+      if (msg.type() === 'error' || msg.type() === 'warning') logs.push(`[${msg.type()}] ${msg.text()}`)
+    })
+    page.on('pageerror', (err) => logs.push(`[pageerror] ${err.message}`))
+    page.on('worker', (w) => {
+      w.on('console', (msg) => logs.push(`[worker:${msg.type()}] ${msg.text()}`))
+    })
+
+    // 直接把本地图纸喂给页面，避免复制到大目录
+    await page.route('**/samples/**', async (route) => {
+      const url = new URL(route.request().url())
+      const name = decodeURIComponent(url.pathname.split('/').pop())
+      const target = [
+        path.join(root, 'samples', name),
+        path.join(root, 'testfile', name),
+        path.join(root, name)
+      ].find((p) => fs.existsSync(p))
+      if (target) {
+        await route.fulfill({ status: 200, body: fs.readFileSync(target), contentType: 'application/octet-stream' })
+      } else {
+        await route.fulfill({ status: 404, body: 'not found' })
+      }
+    })
+
+    await page.goto(`http://127.0.0.1:${port}/tools/render-probe.html`, { waitUntil: 'load' })
+    await page.waitForFunction(() => window.__ready === true, null, { timeout: 30000 })
+
+    console.log(`\n=== ${label} (${bytes(fs.statSync(abs).size)}) ===`)
+    const url = `http://127.0.0.1:${port}/samples/${encodeURIComponent(label)}`
+    let data
+    try {
+      const probeOpts = {
+        preload: process.env.PROBE_PRELOAD === '1',
+        viewerOptions: process.env.PROBE_PAPER === '1' ? { includePaperSpace: true } : {}
+      }
+      data = await page.evaluate(
+        ([u, o]) => window.__probe(u, o),
+        [url, probeOpts]
+      )
+    } catch (error) {
+      data = { file: label, fatal: String(error) }
+    }
+
+    if (!data.fatal) {
+      const shot = path.join(outDir, `${label.replace(/[^\w.\u4e00-\u9fa5-]/g, '_')}.png`)
+      await page.screenshot({ path: shot })
+      data.screenshot = path.relative(root, shot)
+      data.consoleErrors = logs.slice(0, 20)
+      const r = data.render
+      console.log(
+        `解析 ${data.parseElapsedMs}ms · 首帧构建 ${r.buildElapsedMs ?? '-'}ms · 后端 ${data.backend} · ` +
+          `实体 ${data.entityCount} · 图层 ${data.layerCount} · 块 ${data.blockCount} · 布局 ${data.pageCount} · ` +
+          `代理 ${data.proxies.total}`
+      )
+      console.log(
+        `绘制 ${r.drawn}/${r.total} · 跳过 ${r.skipped} · 视口裁剪 ${r.culledPrimitiveCount} · ` +
+          `GPU ${r.gpuMemoryMB ?? '-'}MB · 平移帧 ${data.interaction.panFrameMs.p50}ms(p95 ${data.interaction.panFrameMs.p95}ms)`
+      )
+      console.log(
+        `预编译 ${data.preloadMs}ms · 布局空间实体 ${data.paperSpaceEntities} · 元数据键 ${(data.metadataKeys || []).join(',')}`
+      )
+      if (data.missingReferences.length) console.log(`缺失引用(${data.missingReferences.length}): ${data.missingReferences.slice(0, 8).join(', ')}`)
+      if (Object.keys(r.unsupported || {}).length) console.log(`不支持的实体类型: ${JSON.stringify(r.unsupported).slice(0, 300)}`)
+      if (data.warnings.length) console.log(`警告: ${data.warnings.slice(0, 3).join(' | ')}`)
+      if (data.consoleErrors?.length) console.log(`控制台错误: ${data.consoleErrors.slice(0, 3).join(' | ')}`)
+      console.log(`截图: ${data.screenshot}`)
+    } else {
+      console.log('失败：', data.fatal)
+      if (logs.length) console.log(logs.slice(0, 5).join('\n'))
+    }
+    results.push(data)
+    await page.close()
+  }
+} finally {
+  await browser.close()
+  viteChild.kill('SIGTERM')
+}
+
+fs.writeFileSync(path.join(outDir, 'probe-report.json'), JSON.stringify(results, null, 2))
+console.log(`\n报告：${path.relative(root, path.join(outDir, 'probe-report.json'))}`)
diff --git a/scripts/profile-worker.mjs b/scripts/profile-worker.mjs
new file mode 100644
index 0000000..91c9550
--- /dev/null
+++ b/scripts/profile-worker.mjs
@@ -0,0 +1,196 @@
+#!/usr/bin/env node
+// 用 CDP 对 DWG worker 内部做采样剖析，定位解析耗时的热点函数。
+// 用法：node scripts/profile-worker.mjs "testfile/xxx.dwg"
+import fs from 'node:fs'
+import path from 'node:path'
+import { spawn } from 'node:child_process'
+
+const root = process.cwd()
+const ven = path.resolve(root, '..', 'ven')
+const file = process.argv[2]
+if (!file) {
+  console.error('用法: node scripts/profile-worker.mjs <dwg 文件>')
+  process.exit(1)
+}
+const PORT = Number(process.env.CDP_PORT || 9333)
+const HTTP_PORT = Number(process.env.PROBE_PORT || 5199)
+
+const chrome = [
+  process.env.CHROME_PATH,
+  path.join(ven, 'chrome-for-testing', 'chrome-linux64', 'chrome'),
+  '/usr/bin/google-chrome'
+].find((p) => p && fs.existsSync(p))
+
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms))
+
+const vite = spawn(
+  process.execPath,
+  [path.join(root, 'node_modules', 'vite', 'bin', 'vite.js'), '--port', String(HTTP_PORT), '--strictPort', '--host', '127.0.0.1'],
+  { cwd: root, stdio: 'ignore' }
+)
+const chromeProc = spawn(
+  chrome,
+  [
+    '--headless=new',
+    '--no-sandbox',
+    `--remote-debugging-port=${PORT}`,
+    '--remote-allow-origins=*',
+    '--user-data-dir=/tmp/probe-cdp-profile',
+    '--use-gl=angle',
+    '--use-angle=swiftshader',
+    '--enable-unsafe-swiftshader',
+    'about:blank'
+  ],
+  { stdio: 'ignore' }
+)
+
+async function getWsUrl() {
+  for (let i = 0; i < 60; i++) {
+    try {
+      const res = await fetch(`http://127.0.0.1:${PORT}/json/version`)
+      const json = await res.json()
+      if (json.webSocketDebuggerUrl) return json.webSocketDebuggerUrl
+    } catch {}
+    await sleep(300)
+  }
+  throw new Error('Chrome CDP 未就绪')
+}
+
+let nextId = 1
+const pending = new Map()
+const listeners = []
+
+function makeClient(ws) {
+  ws.addEventListener('message', (event) => {
+    const msg = JSON.parse(event.data)
+    if (msg.id && pending.has(msg.id)) {
+      const { resolve, reject } = pending.get(msg.id)
+      pending.delete(msg.id)
+      msg.error ? reject(new Error(JSON.stringify(msg.error))) : resolve(msg.result)
+    } else if (msg.method) {
+      for (const l of listeners) l(msg)
+    }
+  })
+  return (method, params = {}, sessionId) => {
+    const id = nextId++
+    const payload = { id, method, params }
+    if (sessionId) payload.sessionId = sessionId
+    return new Promise((resolve, reject) => {
+      pending.set(id, { resolve, reject })
+      ws.send(JSON.stringify(payload))
+      setTimeout(() => {
+        if (pending.has(id)) {
+          pending.delete(id)
+          reject(new Error(`CDP 超时: ${method}`))
+        }
+      }, 600000)
+    })
+  }
+}
+
+function aggregate(profile) {
+  const byId = new Map(profile.nodes.map((n) => [n.id, n]))
+  const self = new Map()
+  const total = profile.samples?.length || 0
+  const counts = new Map()
+  for (const s of profile.samples || []) counts.set(s, (counts.get(s) || 0) + 1)
+  const interval = (profile.endTime - profile.startTime) / (total || 1)
+  for (const [nodeId, count] of counts) {
+    const node = byId.get(nodeId)
+    if (!node) continue
+    const cf = node.callFrame
+    const url = (cf.url || '').replace(/^.*\/wasm\//, 'wasm/')
+    const key = `${cf.functionName || '(anonymous)'} @ ${url.split('/').pop()}:${cf.lineNumber + 1}`
+    self.set(key, (self.get(key) || 0) + count * interval)
+  }
+  return [...self.entries()].sort((a, b) => b[1] - a[1]).slice(0, 30)
+}
+
+let exitCode = 0
+try {
+  await sleep(1500)
+  const wsUrl = await getWsUrl()
+  const ws = new WebSocket(wsUrl)
+  await new Promise((r) => ws.addEventListener('open', r))
+  const send = makeClient(ws)
+
+  const workerTargets = []
+  listeners.push((msg) => {
+    if (msg.method === 'Target.targetCreated' && msg.params.targetInfo.type === 'worker') {
+      workerTargets.push(msg.params.targetInfo)
+    }
+  })
+  await send('Target.setDiscoverTargets', { discover: true })
+  await send('Target.setAutoAttach', { autoAttach: true, waitForDebuggerOnStart: false, flatten: true })
+
+  const page = await send('Target.createTarget', { url: `http://127.0.0.1:${HTTP_PORT}/tools/render-probe.html` })
+  const pageSession = (await send('Target.attachToTarget', { targetId: page.targetId, flatten: true })).sessionId
+  await send('Runtime.enable', {}, pageSession)
+  await sleep(2500)
+
+  const label = path.basename(file)
+  const url = `http://127.0.0.1:${HTTP_PORT}/samples/${encodeURIComponent(label)}`
+
+  // 1) 先建 viewer 并预编译 wasm —— 让 worker 线程提前存在，便于挂上剖析器
+  const prepared = await send(
+    'Runtime.evaluate',
+    {
+      expression: `window.__prepare(${JSON.stringify(url)}).then(r => JSON.stringify(r))`,
+      awaitPromise: true,
+      returnByValue: true
+    },
+    pageSession
+  )
+  console.log('预编译:', prepared.result?.value)
+
+  let workerSession = null
+  for (let i = 0; i < 80 && !workerSession; i++) {
+    const targets = (await send('Target.getTargets')).targetInfos || []
+    const target = targets.find((t) => /dwg-worker/.test(t.url || ''))
+    if (target) {
+      const attached = await send('Target.attachToTarget', { targetId: target.targetId, flatten: true })
+      workerSession = attached.sessionId
+    } else {
+      await sleep(250)
+    }
+  }
+  if (!workerSession) {
+    const targets = (await send('Target.getTargets')).targetInfos || []
+    console.log('可见 targets:', targets.map((t) => `${t.type}:${t.url}`).join('\n  '))
+    throw new Error('未发现 DWG worker target')
+  }
+
+  await send('Profiler.enable', {}, workerSession)
+  await send('Profiler.setSamplingInterval', { interval: 200 }, workerSession)
+
+  const started = Date.now()
+  await send('Profiler.start', {}, workerSession)
+  const result = await send(
+    'Runtime.evaluate',
+    {
+      expression: `window.__loadPrepared().then(r => JSON.stringify(r))`,
+      awaitPromise: true,
+      returnByValue: true
+    },
+    pageSession
+  )
+  console.log('页面结果:', result.result?.value || result, `(墙钟 ${Date.now() - started}ms)`)
+
+  const { profile } = await send('Profiler.stop', {}, workerSession)
+  const rows = aggregate(profile)
+  const totalMs = (profile.endTime - profile.startTime) / 1000
+  console.log(`\nworker 采样总时长 ${Math.round(totalMs)}ms，自耗时 Top：`)
+  for (const [key, us] of rows) {
+    if (us < 20000) continue
+    console.log(`  ${(us / 1000).toFixed(0).padStart(6)}ms  ${key}`)
+  }
+  fs.writeFileSync('/tmp/worker-profile.json', JSON.stringify(profile))
+  console.log('\n原始 profile: /tmp/worker-profile.json')
+} catch (error) {
+  console.error('剖析失败:', error.message)
+  exitCode = 1
+} finally {
+  vite.kill('SIGTERM')
+  chromeProc.kill('SIGTERM')
+  setTimeout(() => process.exit(exitCode), 300)
+}
diff --git a/src/cad/docViews.ts b/src/cad/docViews.ts
new file mode 100644
index 0000000..0a11cf7
--- /dev/null
+++ b/src/cad/docViews.ts
@@ -0,0 +1,143 @@
+import type { CadDocument, CadEntity } from '@flyfish-dev/cad-viewer'
+
+export interface CadView {
+  id: string
+  /** 面板里显示的名字 */
+  name: string
+  /** 面板里的次要说明，如“12,340 实体” */
+  hint: string
+  /** 该视图要渲染的实体集合 */
+  entities: CadEntity[]
+  kind: 'model' | 'paper' | 'block'
+}
+
+const SPACE_BLOCK = /^\*?(model|paper)_space/i
+const MAX_BLOCK_VIEWS = 40
+
+function blockNameOf(entity: CadEntity): string | undefined {
+  if (entity.type !== 'INSERT' && entity.kind !== 'insert') return undefined
+  const record = entity as unknown as { blockName?: string; effectiveBlockName?: string; name?: string }
+  const name = record.effectiveBlockName || record.blockName || record.name
+  return typeof name === 'string' && name.trim() ? name.trim().toLowerCase() : undefined
+}
+
+function childNames(entities: CadEntity[]): string[] {
+  const names = new Set<string>()
+  for (const entity of entities) {
+    const name = blockNameOf(entity)
+    if (name) names.add(name)
+  }
+  return [...names]
+}
+
+/**
+ * 把解析结果拆成可切换的视图：
+ * - 模型空间 / 布局空间（按 isInPaperSpace 拆分）
+ * - 顶层“游离块”：既没被模型/布局空间引用、也没被其它块引用的块。
+ *   很多图纸（尤其带“图纸视图”的施工图）几何全放在这种块里，不列出来就是一片空白。
+ */
+export function buildCadViews(doc: CadDocument): CadView[] {
+  const views: CadView[] = []
+  const model = doc.entities.filter((entity) => entity.isInPaperSpace !== true)
+  const paper = doc.entities.filter((entity) => entity.isInPaperSpace === true)
+
+  if (model.length) {
+    views.push({
+      id: 'model',
+      name: '模型空间',
+      hint: `${model.length.toLocaleString()} 实体`,
+      entities: model,
+      kind: 'model'
+    })
+  }
+  if (paper.length) {
+    views.push({
+      id: 'paper',
+      name: '布局空间',
+      hint: `${paper.length.toLocaleString()} 实体`,
+      entities: paper,
+      kind: 'paper'
+    })
+  }
+
+  // 同名块常因大小写各存一份，按小写名去重并保留实体更多的那份
+  const byName = new Map<string, { name: string; entities: CadEntity[] }>()
+  for (const block of Object.values(doc.blocks || {})) {
+    const name = String(block.name ?? '').trim()
+    if (!name) continue
+    const key = name.toLowerCase()
+    const entities = block.entities || []
+    const existing = byName.get(key)
+    if (!existing || entities.length > existing.entities.length) byName.set(key, { name, entities })
+  }
+
+  const childRefs = new Map<string, string[]>()
+  const referencedByAnyBlock = new Set<string>()
+  for (const [key, block] of byName) {
+    const children = childNames(block.entities)
+    childRefs.set(key, children)
+    for (const child of children) referencedByAnyBlock.add(child)
+  }
+  const sceneRefs = new Set(childNames([...model, ...paper]))
+
+  const isFreeStanding = (key: string): boolean =>
+    !sceneRefs.has(key) && !referencedByAnyBlock.has(key) && !SPACE_BLOCK.test(byName.get(key)!.name)
+
+  let roots = [...byName.keys()].filter((key) => byName.get(key)!.entities.length > 0 && isFreeStanding(key))
+
+  // 没有“完全游离”的块时，退而求其次：只要没被模型/布局空间直接引用的块都算候选
+  if (!roots.length) {
+    roots = [...byName.keys()].filter(
+      (key) => byName.get(key)!.entities.length > 0 && !sceneRefs.has(key) && !SPACE_BLOCK.test(byName.get(key)!.name)
+    )
+  }
+
+  // 递归统计展开后的实体总数（含嵌套块），带环保护
+  const expanded = (key: string, stack: Set<string>): number => {
+    const block = byName.get(key)
+    if (!block || stack.has(key)) return 0
+    stack.add(key)
+    let total = block.entities.length
+    for (const child of childRefs.get(key) ?? []) total += expanded(child, stack)
+    stack.delete(key)
+    return total
+  }
+
+  const ranked = roots
+    .map((key) => {
+      const block = byName.get(key)!
+      const total = expanded(key, new Set())
+      return { key, block, total }
+    })
+    .sort((a, b) => b.total - a.total)
+    .slice(0, MAX_BLOCK_VIEWS)
+
+  for (const [index, entry] of ranked.entries()) {
+    const nested = (childRefs.get(entry.key) ?? []).length
+    views.push({
+      id: `block:${index}`,
+      name: entry.block.name,
+      hint: `${entry.total.toLocaleString()} 实体${nested ? ` · 含 ${nested} 个子块` : ''}（图纸里的游离块）`,
+      entities: entry.block.entities,
+      kind: 'block'
+    })
+  }
+
+  return views
+}
+
+/** 统计代理对象 / 遮挡区域，供界面提示 */
+export function summarizeEntities(entities: CadEntity[]): {
+  proxies: number
+  wipeouts: number
+  total: number
+} {
+  let proxies = 0
+  let wipeouts = 0
+  for (const entity of entities) {
+    const type = String(entity.type || '').toUpperCase()
+    if (type.includes('PROXY')) proxies += 1
+    else if (type === 'WIPEOUT') wipeouts += 1
+  }
+  return { proxies, wipeouts, total: entities.length }
+}
diff --git a/src/cad/flyfishViewer.ts b/src/cad/flyfishViewer.ts
index 32d56cb..b2c2784 100644
--- a/src/cad/flyfishViewer.ts
+++ b/src/cad/flyfishViewer.ts
@@ -1,8 +1,9 @@
 import './polyfills'
 import {
   CadViewer,
-  type CadViewerLoadResult,
-  type CadDocument as FlyCadDocument
+  type CadDocument as FlyCadDocument,
+  type CadEntity,
+  type CadViewerLoadResult
 } from '@flyfish-dev/cad-viewer'
 import '@flyfish-dev/cad-viewer/styles.css'
 import { clear, h, icon, iconButton } from '../core/dom'
@@ -11,6 +12,7 @@ import { getTheme, onThemeChange, toggleTheme } from '../core/theme'
 import { toast } from '../core/toast'
 import type { ViewerHost } from '../core/viewerHost'
 import { showAbout } from '../ui/about'
+import { buildCadViews, summarizeEntities, type CadView } from './docViews'
 
 interface Callbacks {
   onBack: () => void
@@ -33,6 +35,10 @@ export class FlyfishCadViewer {
   private themeBtn!: HTMLButtonElement
   private fullscreenBtn!: HTMLButtonElement
   private result: CadViewerLoadResult | null = null
+  private views: CadView[] = []
+  private activeViewId = 'model'
+  private viewListEl: HTMLElement | null = null
+  private diagEl: HTMLElement | null = null
   private themeUnsub: (() => void) | null = null
   private resizeObserver: ResizeObserver | null = null
   private destroyed = false
@@ -54,8 +60,14 @@ export class FlyfishCadViewer {
       workerUrl: new URL('wasm/dwg-worker.js', document.baseURI).href,
       dwfWasmUrl: new URL('wasm/dwfv-render.wasm', document.baseURI).href,
       useWorker: true,
-      workerTimeoutMs: 120000,
+      workerTimeoutMs: 180000,
+      // File → worker 直接转移 ArrayBuffer，省掉一次几十 MB 的拷贝
+      transferInputBuffer: true,
+      maxInsertDepth: 32,
       autoFit: true,
+      // 布局空间实体默认被丢弃，这里取回后在“布局空间”视图里单独渲染
+      includePaperSpace: true,
+      // File → worker 直接转移 ArrayBuffer，省掉一次 23MB 级别的内存拷贝
       canvasOptions: {
         fitMode: 'auto',
         background: '#0d1117',
@@ -64,10 +76,15 @@ export class FlyfishCadViewer {
         enableSpatialIndex: true,
         spatialIndexCellCount: 96,
         maxCurveSegments: 72,
-        maxVisibleTextLabels: 2400
+        maxVisibleTextLabels: 2400,
+        // 代理对象/不支持的实体画成方框，避免静默消失
+        showUnsupportedMarkers: true
       },
       onLoadProgress: (progress) => {
-        this.host.setLoaderMessage(progress.message || '正在解析 DWG 图纸…', this.file.name)
+        this.host.setLoaderMessage(progress.message || '正在解析 DWG 图纸…', this.file.name, progress.percent)
+        const w = window as unknown as { __progress?: Array<{ ms: number; phase: string }> }
+        if (!w.__progress) w.__progress = []
+        w.__progress.push({ ms: Math.round(performance.now() - ((window as unknown as { __openAt?: number }).__openAt ?? performance.now())), phase: progress.phase })
       },
       onViewChange: () => this.updateStatus(),
       onError: (error) => {
@@ -77,6 +94,8 @@ export class FlyfishCadViewer {
 
     this.tools = this.buildTools()
     this.sheetBackdrop = h('div', { class: 'sheet-backdrop' })
+    this.viewListEl = h('div', { class: 'view-list' })
+    this.diagEl = h('div', { class: 'diag-box' })
     this.sheetList = h('div', { class: 'sheet-list' })
     this.sheetBackdrop.appendChild(this.buildSheet())
     host.stage.append(this.tools, this.sheetBackdrop)
@@ -93,9 +112,15 @@ export class FlyfishCadViewer {
   }
 
   async load(): Promise<void> {
+    const tStart = performance.now()
+    const marks: Record<string, number> = {}
+    const mark = (name: string) => {
+      marks[name] = Math.round(performance.now() - tStart)
+    }
     this.host.showLoader('正在加载 DWG 图纸…', this.file.name)
     try {
       const result = await this.viewer.loadFile(this.file)
+      mark('parsed')
       this.result = result
       this.host.hideLoader()
       this.host.setFileInfo(
@@ -105,11 +130,32 @@ export class FlyfishCadViewer {
         'cad',
         `${result.document.entities.length.toLocaleString()} 个实体 · ${formatBytes(this.file.size)}`
       )
-      this.viewer.fit('auto')
+      this.views = buildCadViews(result.document)
+      mark('views')
+      const hasModel = this.views.some((view) => view.kind === 'model')
+      const firstBlock = this.views.find((view) => view.kind === 'block')
+      if (!hasModel && firstBlock) {
+        // 模型空间为空：内容全在“未插入的块”里，直接显示第一个，别给用户一片黑屏
+        this.activeViewId = firstBlock.id
+        this.rendererSetEntities(firstBlock.entities)
+      } else {
+        this.activeViewId = this.views[0]?.id ?? 'model'
+      }
+      mark('entities-set')
+      this.viewer.fit(this.views.length > 1 ? 'extents' : 'auto')
+      mark('fitted')
       this.applyTheme()
       this.updateStatus()
-      if (result.warnings.length) toast(result.warnings[0], 'info', 6000)
+      if (!hasModel && firstBlock) {
+        toast(`模型空间为空，已显示图纸中的“${firstBlock.name}”块（${this.views.length - 1} 个可切换视图）`, 'info', 7000)
+      } else if (result.warnings.length) {
+        toast(result.warnings[0], 'info', 6000)
+      }
       this.refreshSheetRows()
+      this.refreshViewRows()
+      this.refreshDiagnostics()
+      mark('done')
+      ;(window as unknown as { __loadTimings?: Record<string, number> }).__loadTimings = marks
     } catch (error) {
       this.host.hideLoader()
       throw error
@@ -149,7 +195,7 @@ export class FlyfishCadViewer {
       this.updateStatus()
     })
     tools.appendChild(h('div', { class: 'tool-divider' }))
-    add('layers', '图层', 'layers', () => this.openSheet())
+    add('layers', '视图与图层', 'layers', () => this.openSheet())
     this.themeBtn = add('sun', '切换背景', 'theme', () => {
       toggleTheme()
       this.applyTheme()
@@ -158,8 +204,104 @@ export class FlyfishCadViewer {
     return tools
   }
 
+  private rendererSetEntities(entities: CadEntity[]): void {
+    const doc = this.result?.document
+    if (!doc) return
+    const renderer = this.viewer.renderer
+    const state = renderer.getViewState()
+    renderer.setDocument({ ...doc, entities })
+    renderer.setViewState(state)
+    renderer.render()
+  }
+
+  private switchView(id: string): void {
+    const view = this.views.find((item) => item.id === id)
+    if (!view || id === this.activeViewId) return
+    this.activeViewId = id
+    this.rendererSetEntities(view.entities)
+    this.viewer.fit(view.kind === 'model' ? 'auto' : 'extents')
+    this.updateStatus()
+    this.refreshViewRows()
+  }
+
+  private refreshViewRows(): void {
+    const list = this.viewListEl
+    if (!list) return
+    clear(list)
+    if (this.views.length <= 1) return
+    for (const view of this.views) {
+      const active = view.id === this.activeViewId
+      const row = h('button', {
+        class: `view-row ${active ? 'active' : ''}`,
+        type: 'button',
+        title: view.name
+      })
+      row.append(
+        h('span', { class: 'view-kind', text: view.kind === 'model' ? 'M' : view.kind === 'paper' ? 'L' : 'B' }),
+        h(
+          'span',
+          { class: 'view-info' },
+          h('span', { class: 'view-name', text: view.name }),
+          h('span', { class: 'view-hint', text: view.hint })
+        )
+      )
+      row.addEventListener('click', () => this.switchView(view.id))
+      list.appendChild(row)
+    }
+  }
+
+  private refreshDiagnostics(): void {
+    const box = this.diagEl
+    const doc = this.result?.document
+    if (!box || !doc) return
+    clear(box)
+    const stats = summarizeEntities(doc.entities)
+    const missing = this.viewer.getMissingReferences?.() ?? []
+    const lines: string[] = []
+    if (stats.proxies) lines.push(`${stats.proxies} 个代理对象（ACAD_PROXY_ENTITY）`)
+    if (stats.wipeouts) lines.push(`${stats.wipeouts} 个遮挡区域（WIPEOUT）`)
+    if (missing.length) lines.push(`缺少 ${missing.length} 个 SHX 字体/线型文件`)
+    if (!lines.length) return
+    box.appendChild(h('div', { class: 'diag-title', text: '渲染提示' }))
+    for (const line of lines) box.appendChild(h('div', { class: 'diag-line', text: `· ${line}` }))
+    if (missing.length) {
+      const names = missing
+        .map((ref) => (ref as { fileName?: string; name?: string }).fileName ?? (ref as { name?: string }).name ?? '')
+        .filter(Boolean)
+      if (names.length) box.appendChild(h('div', { class: 'diag-line diag-muted', text: names.join('、') }))
+      const picker = h('input', { type: 'file', accept: '.shx,.SHX', multiple: true })
+      picker.style.display = 'none'
+      const importBtn = h('button', { class: 'chip-btn', type: 'button', text: '导入 SHX 字体' })
+      importBtn.addEventListener('click', () => picker.click())
+      picker.addEventListener('change', () => void this.importShx(picker))
+      box.append(importBtn, picker)
+    }
+  }
+
+  private async importShx(picker: HTMLInputElement): Promise<void> {
+    const files = [...(picker.files ?? [])]
+    if (!files.length) return
+    let loaded = 0
+    for (const file of files) {
+      try {
+        await this.viewer.addReferenceFile(file)
+        loaded += 1
+      } catch {
+        /* 单个字体失败不影响其它 */
+      }
+    }
+    picker.value = ''
+    if (loaded) {
+      toast(`已载入 ${loaded} 个 SHX 文件，线型/文字已重绘`, 'success', 3200)
+      this.rendererSetEntities(this.views.find((view) => view.id === this.activeViewId)?.entities ?? [])
+      this.refreshDiagnostics()
+    } else {
+      toast('SHX 载入失败', 'error')
+    }
+  }
+
   private buildSheet(): HTMLElement {
-    const title = h('div', { class: 'sheet-title' }, h('span', { text: '图层' }))
+    const title = h('div', { class: 'sheet-title' }, h('span', { text: '视图与图层' }))
     const close = iconButton('x', '关闭', () => this.closeSheet())
     const head = h('div', { class: 'sheet-head' }, title, close)
     const actions = h('div', { class: 'sheet-actions' })
@@ -181,8 +323,11 @@ export class FlyfishCadViewer {
     })
     return h(
       'aside',
-      { class: 'sheet', role: 'dialog', 'aria-label': '图层' },
+      { class: 'sheet', role: 'dialog', 'aria-label': '视图与图层' },
       head,
+      this.diagEl,
+      this.viewListEl,
+      h('div', { class: 'sheet-subtitle', text: '图层' }),
       actions,
       this.sheetList
     )
@@ -258,6 +403,8 @@ export class FlyfishCadViewer {
 
   private openSheet(): void {
     this.refreshSheetRows()
+    this.refreshViewRows()
+    this.refreshDiagnostics()
     this.sheetBackdrop.classList.add('open')
   }
 
@@ -285,8 +432,10 @@ export class FlyfishCadViewer {
     if (this.destroyed || !this.result) return
     const zoom = Math.round(this.viewer.getZoomPercent())
     const backend = (this.viewer.renderer as { backend?: string }).backend ?? 'canvas2d'
-    const entities = this.result.document.entities.length.toLocaleString()
-    this.host.setStatus(`${this.file.name} · ${zoom}% · ${entities} 实体 · ${backend}`)
+    const view = this.views.find((item) => item.id === this.activeViewId)
+    const entities = (view?.entities.length ?? this.result.document.entities.length).toLocaleString()
+    const viewLabel = this.views.length > 1 && view ? `${view.name} · ` : ''
+    this.host.setStatus(`${this.file.name} · ${viewLabel}${zoom}% · ${entities} 实体 · ${backend}`)
   }
 
   private onFullscreenChange = () => {
diff --git a/src/core/app.ts b/src/core/app.ts
index 0a7f8fb..b1c89c0 100644
--- a/src/core/app.ts
+++ b/src/core/app.ts
@@ -245,6 +245,8 @@ async function clearAllRecent(): Promise<void> {
 }
 
 async function openFile(file: File): Promise<void> {
+  ;(window as unknown as { __openAt?: number }).__openAt = performance.now()
+  ;(window as unknown as { __progress?: unknown }).__progress = []
   if (busy) {
     toast('正在打开文件，请稍候…', 'info', 1600)
     return
diff --git a/src/core/viewerHost.ts b/src/core/viewerHost.ts
index ab4cb78..fe9538b 100644
--- a/src/core/viewerHost.ts
+++ b/src/core/viewerHost.ts
@@ -11,7 +11,7 @@ export interface ViewerHost {
   setSubbar: (content: Node | null) => void
   setStatus: (text: string, title?: string) => void
   showLoader: (message: string, detail?: string) => void
-  setLoaderMessage: (message: string, detail?: string) => void
+  setLoaderMessage: (message: string, detail?: string, percent?: number) => void
   hideLoader: () => void
   destroy: () => void
 }
@@ -38,11 +38,11 @@ export function createViewerHost(onBack: () => void): ViewerHost {
   const body = h('div', { class: 'viewer-body' }, stage)
   const loaderText = h('div', { class: 'loader-text', text: '正在打开…' })
   const loaderDetail = h('div', { class: 'loader-detail' })
-  const loader = h(
-    'div',
-    { class: 'viewer-loader', hidden: true },
-    h('div', { class: 'loader-card' }, h('div', { class: 'spinner' }), loaderText, loaderDetail)
-  )
+  // 解析期间用“确定进度条”代替无限旋转动画：低端设备/软件渲染下，持续动画会真的拖慢解析
+  const barFill = h('div', { class: 'loader-bar-fill' })
+  const bar = h('div', { class: 'loader-bar', hidden: true }, barFill)
+  const spinner = h('div', { class: 'spinner' })
+  const loader = h('div', { class: 'viewer-loader', hidden: true }, h('div', { class: 'loader-card' }, spinner, loaderText, loaderDetail, bar))
   const root = h('section', { class: 'viewer' }, header, subbar, body, loader)
 
   const setSubbar = (content: Node | null) => {
@@ -84,9 +84,14 @@ export function createViewerHost(onBack: () => void): ViewerHost {
       loaderText.textContent = message
       loaderDetail.textContent = detail ?? ''
     },
-    setLoaderMessage: (message, detail) => {
+    setLoaderMessage: (message, detail, percent) => {
       loaderText.textContent = message
       loaderDetail.textContent = detail ?? ''
+      const determinate = typeof percent === 'number' && Number.isFinite(percent)
+      // 知道百分比时隐藏旋转动画（display:none 会停止动画），只更新进度条宽度
+      spinner.style.display = determinate ? 'none' : ''
+      bar.hidden = !determinate
+      if (determinate) barFill.style.width = `${Math.max(0, Math.min(100, percent))}%`
     },
     hideLoader: () => {
       loader.hidden = true
diff --git a/src/styles.css b/src/styles.css
index a52c78e..3288eb6 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -824,9 +824,10 @@ a {
   z-index: 80;
   display: grid;
   place-items: center;
-  background: rgba(8, 11, 17, 0.72);
-  backdrop-filter: blur(8px);
+  /* 解析大图纸时这个遮罩会长时间停留：不要用 backdrop-filter（每帧整屏模糊非常吃 CPU/GPU） */
+  background: rgba(8, 11, 17, 0.82);
   padding: 20px;
+  contain: strict;
 }
 
 .loader-card {
@@ -859,6 +860,22 @@ a {
   }
 }
 
+.loader-bar {
+  width: 100%;
+  height: 4px;
+  border-radius: 999px;
+  background: var(--line-strong);
+  overflow: hidden;
+}
+
+.loader-bar-fill {
+  height: 100%;
+  width: 0%;
+  border-radius: 999px;
+  background: var(--accent);
+  transition: width 0.25s ease-out;
+}
+
 .loader-text {
   font-size: 14px;
   font-weight: 650;
@@ -1099,6 +1116,127 @@ a {
   overscroll-behavior: contain;
 }
 
+.sheet-subtitle {
+  padding: 10px 14px 4px;
+  font-size: 12px;
+  font-weight: 650;
+  letter-spacing: 0.04em;
+  color: var(--muted);
+  text-transform: uppercase;
+  flex: none;
+}
+
+.view-list {
+  flex: none;
+  max-height: 42vh;
+  overflow-y: auto;
+  padding: 0 8px;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  overscroll-behavior: contain;
+}
+
+.view-row {
+  width: 100%;
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 9px 10px;
+  border-radius: 10px;
+  text-align: left;
+  color: var(--text);
+  border: 1px solid transparent;
+  transition: background 0.15s, border-color 0.15s;
+}
+
+.view-row:hover {
+  background: var(--bg-2);
+}
+
+.view-row.active {
+  background: var(--accent-soft);
+  border-color: var(--accent);
+}
+
+.view-kind {
+  width: 20px;
+  height: 20px;
+  border-radius: 6px;
+  flex: none;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 11px;
+  font-weight: 700;
+  background: var(--bg-3, rgba(255, 255, 255, 0.08));
+  color: var(--muted);
+}
+
+.view-row.active .view-kind {
+  background: var(--accent);
+  color: #fff;
+}
+
+.view-info {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.view-name {
+  font-size: 13px;
+  font-weight: 550;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.view-hint {
+  font-size: 10.5px;
+  color: var(--muted);
+}
+
+.diag-box {
+  flex: none;
+  margin: 0 14px 10px;
+  padding: 10px 12px;
+  border-radius: 10px;
+  background: var(--bg-2);
+  border: 1px solid var(--line);
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  font-size: 11.5px;
+  color: var(--text);
+}
+
+.diag-box:empty {
+  display: none;
+}
+
+.diag-title {
+  font-weight: 650;
+  font-size: 12px;
+}
+
+.diag-line {
+  color: var(--muted);
+  line-height: 1.45;
+}
+
+.diag-muted {
+  opacity: 0.75;
+  word-break: break-all;
+}
+
+.diag-box .chip-btn {
+  align-self: flex-start;
+  margin-top: 4px;
+}
+
 .layer-row {
   width: 100%;
   display: flex;
diff --git a/src/ui/about.ts b/src/ui/about.ts
index 2aa94ab..31dd363 100644
--- a/src/ui/about.ts
+++ b/src/ui/about.ts
@@ -1,7 +1,7 @@
 import { h } from '../core/dom'
 import { openModal } from './modal'
 
-const VERSION = '0.5.0'
+const VERSION = '0.6.0'
 
 export function showAbout(): void {
   const body = h(
diff --git a/tools/render-probe.html b/tools/render-probe.html
new file mode 100644
index 0000000..192caf7
--- /dev/null
+++ b/tools/render-probe.html
@@ -0,0 +1,261 @@
+<!doctype html>
+<html lang="zh-CN">
+  <head>
+    <meta charset="utf-8" />
+    <title>EasyView · DWG render probe</title>
+    <style>
+      html,
+      body {
+        margin: 0;
+        height: 100%;
+        background: #0d1117;
+        overflow: hidden;
+      }
+      #stage {
+        position: fixed;
+        inset: 0;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="stage"></div>
+    <script type="module">
+      import { CadViewer } from '@flyfish-dev/cad-viewer'
+
+      const stage = document.getElementById('stage')
+      let current = null
+
+      function makeViewer(canvasOptions = {}, extra = {}) {
+        return new CadViewer({
+          container: stage,
+          renderer: 'auto',
+          wasmPath: new URL('/wasm/', location.href).href,
+          workerUrl: new URL('/wasm/dwg-worker.js', location.href).href,
+          dwfWasmUrl: new URL('/wasm/dwfv-render.wasm', location.href).href,
+          useWorker: true,
+          autoFit: true,
+          ...extra,
+          canvasOptions: {
+            background: '#0d1117',
+            foreground: '#f4f7fb',
+            contrastMode: 'adaptive',
+            enableSpatialIndex: true,
+            spatialIndexCellCount: 96,
+            maxCurveSegments: 72,
+            maxVisibleTextLabels: 2400,
+            ...canvasOptions
+          }
+        })
+      }
+
+      function summarizeTypes(entities) {
+        const byType = {}
+        for (const e of entities) {
+          const t = e.type || 'UNKNOWN'
+          byType[t] = (byType[t] || 0) + 1
+        }
+        return byType
+      }
+
+      function proxyReport(entities) {
+        const proxies = entities.filter(
+          (e) => /proxy/i.test(e.type || '') || /proxy/i.test(String(e.subType || ''))
+        )
+        const byType = {}
+        for (const e of proxies) {
+          const t = e.type || 'PROXY'
+          byType[t] = (byType[t] || 0) + 1
+        }
+        return { total: proxies.length, byType }
+      }
+
+      window.__probe = async (url, options = {}) => {
+        if (current) {
+          try {
+            current.destroy()
+          } catch {}
+          current = null
+        }
+        stage.innerHTML = ''
+        const viewer = makeViewer(options.canvasOptions || {}, options.viewerOptions || {})
+        current = viewer
+
+        const stats = []
+        let loadProgress = []
+        viewer.onRenderStats?.(() => {})
+        const res = await fetch(url)
+        const buf = await res.arrayBuffer()
+        const name = decodeURIComponent(url.split('/').pop())
+        const file = new File([buf], name)
+
+        let tPreload = 0
+        if (options.preload) {
+          const tp = performance.now()
+          await viewer.preloadDwg()
+          tPreload = performance.now() - tp
+        }
+        const t0 = performance.now()
+        const progressTimeline = []
+        const result = await viewer.loadFile(file, {
+          onProgress: (p) => progressTimeline.push({ ms: Math.round(performance.now() - t0), phase: p.phase, message: p.message })
+        })
+        const tLoad = performance.now() - t0
+        await new Promise((r) => requestAnimationFrame(() => requestAnimationFrame(r)))
+
+        const doc = result.document
+        const firstView = viewer.renderer.render()
+
+        // pan/zoom interaction timing (操作速度)
+        const frameTimes = []
+        const renderer = viewer.renderer
+        let prev = performance.now()
+        for (let i = 0; i < 40; i++) {
+          renderer.panByScreenDelta(8, 6)
+          renderer.render()
+          const now = performance.now()
+          frameTimes.push(now - prev)
+          prev = now
+        }
+        const zoomTimes = []
+        for (let i = 0; i < 20; i++) {
+          const t = performance.now()
+          viewer.zoomIn()
+          zoomTimes.push(performance.now() - t)
+        }
+        viewer.fit('auto')
+
+        const perf = (arr) => {
+          const s = [...arr].sort((a, b) => a - b)
+          return {
+            avg: +(arr.reduce((a, b) => a + b, 0) / arr.length).toFixed(2),
+            p50: +s[Math.floor(s.length * 0.5)].toFixed(2),
+            p95: +s[Math.floor(s.length * 0.95)].toFixed(2),
+            max: +s[s.length - 1].toFixed(2)
+          }
+        }
+
+        const proxySample = doc.entities
+          .filter((e) => /proxy/i.test(e.type || ''))
+          .slice(0, 6)
+          .map((e) => ({
+            keys: Object.keys(e),
+            originalDxfName: e.originalDxfName,
+            graphicsDataSize: e.graphicsDataSize,
+            entityDataSize: e.entityDataSize,
+            hasPreview: !!e.graphicsData,
+            classId: e.applicationEntityClassId
+          }))
+        const proxyWithGraphics = doc.entities.filter(
+          (e) => /proxy/i.test(e.type || '') && (e.graphicsDataSize > 0 || e.entityDataSize > 0)
+        ).length
+
+        // 复现 buildCadViews 的判定，便于对比 App 面板
+        const nameOf = (e) => (e.type === 'INSERT' ? e.effectiveBlockName || e.blockName || e.name : undefined)
+        const byName = new Map()
+        for (const b of Object.values(doc.blocks || {})) {
+          const k = String(b.name || '').trim().toLowerCase()
+          if (!k) continue
+          const cur = byName.get(k)
+          if (!cur || (b.entities || []).length > cur.entities.length) byName.set(k, b)
+        }
+        const sceneRefs = new Set(doc.entities.map(nameOf).filter(Boolean).map((n) => n.toLowerCase()))
+        const candidates = [...byName.entries()].filter(([k, b]) => !sceneRefs.has(k) && !/^\*?(model|paper)_space/i.test(b.name) && (b.entities || []).length)
+        const candRefs = new Map()
+        for (const [k, b] of candidates) {
+          for (const e of b.entities || []) {
+            const n = nameOf(e)
+            if (n) candRefs.set(n.toLowerCase(), (candRefs.get(n.toLowerCase()) || 0) + 1)
+          }
+        }
+        const viewCandidates = candidates
+          .filter(([k]) => !candRefs.has(k))
+          .sort((a, b) => b[1].entities.length - a[1].entities.length)
+          .map(([k, b]) => `${b.name}:${b.entities.length}`)
+        const viewBlockParents = [...candRefs.entries()]
+          .filter(([k]) => /视图/.test(k))
+          .map(([k, c]) => `${k}<-${c}`)
+
+        return {
+          file: name,
+          blockGraph: Object.values(doc.blocks || {})
+            .filter((b) => (b.entities || []).length >= 15)
+            .map((b) => ({ n: b.name, size: b.entities.length, ins: [...new Set((b.entities || []).map(nameOf).filter(Boolean))].slice(0, 8) })),
+          viewCandidates: viewCandidates.slice(0, 12),
+          viewBlockParents: viewBlockParents.slice(0, 12),
+          proxySample,
+          proxyWithGraphics,
+          bytes: result.bytes,
+          parseElapsedMs: Math.round(result.elapsedMs),
+          preloadMs: Math.round(tPreload),
+          progressTimeline,
+          paperSpaceEntities: doc.entities.filter((e) => e.isInPaperSpace === true).length,
+          metadataKeys: Object.keys(doc.metadata || {}),
+          headerKeys: Object.keys(doc.header || {}).slice(0, 40),
+          loadElapsedMs: Math.round(tLoad),
+          backend: firstView.backend || 'unknown',
+          entityCount: doc.entities.length,
+          entityTypes: summarizeTypes(doc.entities),
+          layerCount: Object.keys(doc.layers || {}).length,
+          blockCount: Object.keys(doc.blocks || {}).length,
+          spaceBlocks: Object.entries(doc.blocks || {})
+            .filter(([name]) => /space/i.test(name))
+            .map(([name, b]) => ({ name, entities: (b.entities || []).length })),
+          blockNames: Object.keys(doc.blocks || {}),
+          sceneInserts: [...new Set(doc.entities.filter((e) => e.type === 'INSERT').map((e) => e.effectiveBlockName || e.blockName || e.name).filter(Boolean))],
+          blockEntityTotal: Object.values(doc.blocks || {}).reduce((n, b) => n + (b.entities || []).length, 0),
+          topBlocks: Object.entries(doc.blocks || {})
+            .sort((a, b) => (b[1].entities || []).length - (a[1].entities || []).length)
+            .slice(0, 5)
+            .map(([name, b]) => `${name}:${(b.entities || []).length}`),
+          pages: (doc.pages || []).map((p) => ({ name: p.name, type: p.type })),
+          pageCount: (doc.pages || []).length,
+          proxies: proxyReport(doc.entities),
+          missingReferences: (viewer.getMissingReferences?.() || []).map((r) => r.name || r.fileName || r),
+          loadedReferences: (viewer.getLoadedReferences?.() || []).length,
+          warnings: [...(result.warnings || []), ...(doc.warnings || [])].slice(0, 40),
+          render: {
+            total: firstView.total,
+            drawn: firstView.drawn,
+            skipped: firstView.skipped,
+            unsupported: firstView.unsupported,
+            renderElapsedMs: +firstView.renderElapsedMs.toFixed(2),
+            primitiveCount: firstView.primitiveCount,
+            visiblePrimitiveCount: firstView.visiblePrimitiveCount,
+            culledPrimitiveCount: firstView.culledPrimitiveCount,
+            gpuMemoryMB: firstView.gpuMemoryBytes ? +(firstView.gpuMemoryBytes / 1048576).toFixed(1) : undefined,
+            buildElapsedMs: firstView.buildElapsedMs ? Math.round(firstView.buildElapsedMs) : undefined
+          },
+          interaction: { panFrameMs: perf(frameTimes), zoomCallMs: perf(zoomTimes) },
+          zoomPercent: viewer.getZoomPercent(),
+          loadProgressCount: loadProgress.length
+        }
+      }
+
+      // 供 CDP 剖析用：先建 viewer + 预编译 wasm（不解析），再单独触发解析
+      window.__prepare = async (url) => {
+        if (current) {
+          try { current.destroy() } catch {}
+          current = null
+        }
+        stage.innerHTML = ''
+        const viewer = makeViewer()
+        current = viewer
+        const res = await fetch(url)
+        const buf = await res.arrayBuffer()
+        const name = decodeURIComponent(url.split('/').pop())
+        const file = new File([buf], name)
+        const t = performance.now()
+        await viewer.preloadDwg()
+        window.__pendingFile = file
+        return { preloadMs: Math.round(performance.now() - t) }
+      }
+      window.__loadPrepared = async () => {
+        const t = performance.now()
+        const result = await current.loadFile(window.__pendingFile)
+        return { parseMs: Math.round(performance.now() - t), entities: result.document.entities.length }
+      }
+      window.__capture = async (url) => url
+      window.__ready = true
+    </script>
+  </body>
+</html>
diff --git a/tools/worker-node-run.mjs b/tools/worker-node-run.mjs
new file mode 100644
index 0000000..9128e56
--- /dev/null
+++ b/tools/worker-node-run.mjs
@@ -0,0 +1,49 @@
+// 在 Node 里直接跑 DWG worker 的解析流程（带 CPU profile），用于定位热点。
+// 用法：node --cpu-prof --cpu-prof-dir=/tmp/prof tools/worker-node-run.mjs <dwg> <静态资源根 URL>
+import fs from 'node:fs'
+import path from 'node:path'
+import { pathToFileURL } from 'node:url'
+
+const root = process.cwd()
+const file = process.argv[2]
+const wasmBase = process.argv[3] || 'http://127.0.0.1:8123/wasm/'
+if (!file) throw new Error('需要 DWG 路径')
+
+const messages = []
+globalThis.self = {
+  postMessage(msg) {
+    messages.push(msg)
+    if (msg.type === 'result') {
+      const doc = msg.result?.document
+      console.log('结果: 实体', doc?.entities?.length, '耗时', Math.round(msg.result.elapsedMs), 'ms')
+      for (const m of messages.filter((x) => x.type === 'progress')) {
+        console.log('  progress', m.progress.phase, '|', m.progress.message)
+      }
+      process.exit(0)
+    }
+    if (msg.type === 'error') {
+      console.error('worker 错误:', msg.error)
+      process.exit(1)
+    }
+  },
+  addEventListener() {},
+  removeEventListener() {}
+}
+globalThis.performance = performance
+globalThis.window = globalThis // 让 Emscripten 走 Web 分支（用 fetch 而不是 node:module）
+
+await import(pathToFileURL(path.join(root, 'public/wasm/dwg-worker.js')).href)
+
+const bytes = fs.readFileSync(file)
+const buf = bytes.buffer.slice(bytes.byteOffset, bytes.byteOffset + bytes.byteLength)
+const started = Date.now()
+await globalThis.self.onmessage({
+  data: {
+    requestId: 1,
+    type: 'load',
+    bytes: buf,
+    fileName: path.basename(file),
+    options: { wasmPath: wasmBase }
+  }
+})
+console.log('总耗时', Date.now() - started, 'ms')