diff --git a/app/(chat)/ai-cad/page.tsx b/app/(chat)/ai-cad/page.tsx
index d360c7de1..39dc438d4 100644
--- a/app/(chat)/ai-cad/page.tsx
+++ b/app/(chat)/ai-cad/page.tsx
@@ -26,7 +26,6 @@ export default async function AiCadPage() {
   return (
     <ZooDesignStudioFrame
       isReady={isReady}
-      sourceLabel="HiCAD"
       src={ZOO_MODELING_APP_SRC}
     />
   );
diff --git a/components/ai-cad/zoo-design-studio-frame.tsx b/components/ai-cad/zoo-design-studio-frame.tsx
index 1d66629fd..088a1df80 100644
--- a/components/ai-cad/zoo-design-studio-frame.tsx
+++ b/components/ai-cad/zoo-design-studio-frame.tsx
@@ -1,45 +1,13 @@
 "use client";
 
-import { AlertTriangle, RefreshCw } from "lucide-react";
-import { useEffect, useRef, useState } from "react";
+import { AlertTriangle } from "lucide-react";
 
 type ZooDesignStudioFrameProps = {
   isReady: boolean;
-  sourceLabel: string;
   src: string;
 };
 
-export function ZooDesignStudioFrame({
-  isReady,
-  sourceLabel,
-  src,
-}: ZooDesignStudioFrameProps) {
-  const [loaded, setLoaded] = useState(false);
-  const iframeRef = useRef<HTMLIFrameElement>(null);
-
-  useEffect(() => {
-    if (!isReady) {
-      return;
-    }
-
-    const iframe = iframeRef.current;
-    if (!iframe) {
-      return;
-    }
-
-    const markLoaded = () => setLoaded(true);
-    iframe.addEventListener("load", markLoaded);
-    try {
-      if (iframe.contentDocument?.readyState === "complete") {
-        markLoaded();
-      }
-    } catch {
-      // The regular load event remains the fallback if access is unavailable.
-    }
-
-    return () => iframe.removeEventListener("load", markLoaded);
-  }, [isReady, src]);
-
+export function ZooDesignStudioFrame({ isReady, src }: ZooDesignStudioFrameProps) {
   if (!isReady) {
     return (
       <div className="flex h-svh w-full items-center justify-center overflow-hidden bg-[#10100e] p-6 text-[#f8f6ef]">
@@ -65,20 +33,10 @@ export function ZooDesignStudioFrame({
   }
 
   return (
-    <div className="relative h-svh w-full overflow-hidden bg-[#10100e]">
-      {!loaded && (
-        <div className="pointer-events-none absolute inset-0 z-10 flex items-center justify-center bg-[#10100e] text-[#d3cabb]">
-          <div className="flex items-center gap-3 rounded-lg border border-[#3a352c] bg-[#171510]/95 px-4 py-3 shadow-xl">
-            <RefreshCw className="h-4 w-4 animate-spin" />
-            <span className="text-sm">正在加载 {sourceLabel}</span>
-          </div>
-        </div>
-      )}
+    <div className="h-svh w-full overflow-hidden bg-[#10100e]">
       <iframe
         allow="clipboard-read; clipboard-write; fullscreen; gamepad; pointer-lock; web-share; xr-spatial-tracking"
         className="h-full w-full border-0"
-        onLoad={() => setLoaded(true)}
-        ref={iframeRef}
         referrerPolicy="strict-origin-when-cross-origin"
         sandbox="allow-downloads allow-forms allow-modals allow-pointer-lock allow-popups allow-presentation allow-same-origin allow-scripts"
         src={src}
diff --git a/scripts/vendor-zoo-modeling-app.mjs b/scripts/vendor-zoo-modeling-app.mjs
index f2508929a..c5fa34c8b 100644
--- a/scripts/vendor-zoo-modeling-app.mjs
+++ b/scripts/vendor-zoo-modeling-app.mjs
@@ -25,6 +25,7 @@ const workspaceDir = path.join(root, ".zoo-modeling-app");
 const sourceDir = path.join(workspaceDir, "modeling-app");
 const sourceRefFile = path.join(sourceDir, ".hicad-source-ref");
 const outputDir = path.join(root, "public/vendor/zoo-modeling-app");
+const customizationDir = path.join(root, "vendor/zoo-modeling-app");
 const proxyToken = "hicad-session";
 
 function run(command, args, options = {}) {
@@ -109,6 +110,14 @@ function replaceSource(relativePath, before, after) {
 }
 
 function patchOfficialSource() {
+  copyFileSync(
+    path.join(customizationDir, "Logo.tsx"),
+    path.join(sourceDir, "src/components/Logo.tsx")
+  );
+  copyFileSync(
+    path.join(customizationDir, "localization.ts"),
+    path.join(sourceDir, "src/lib/hicadLocalization.ts")
+  );
   replaceSource(
     "index.html",
     '  <meta name="description" content="An open-source CAD modeling tool from the future by Zoo." />',
@@ -204,6 +213,26 @@ function patchOfficialSource() {
     "    new URL(env().VITE_MLEPHANT_WEBSOCKET_URL ?? '')",
     "    new URL(env().VITE_MLEPHANT_WEBSOCKET_URL ?? '', window.location.href)"
   );
+  replaceSource(
+    "src/index.tsx",
+    "import { markOnce } from '@src/lib/performance'\n",
+    "import { installHiCadLocalization } from '@src/lib/hicadLocalization'\nimport { markOnce } from '@src/lib/performance'\n"
+  );
+  replaceSource(
+    "src/index.tsx",
+    "function launchApp(app: App) {\n  initSingletonBehavior(app)",
+    "function launchApp(app: App) {\n  installHiCadLocalization()\n  initSingletonBehavior(app)"
+  );
+  replaceSource(
+    "src/routes/Onboarding/utils.tsx",
+    `        <p className="m-0 text-center text-xs italic text-chalkboard-70 dark:text-chalkboard-30">
+          To view your account, manage payment methods, or change tiers, simply{' '}`,
+    `        <p
+          data-hicad-official-account-link
+          className="m-0 text-center text-xs italic text-chalkboard-70 dark:text-chalkboard-30"
+        >
+          To view your account, manage payment methods, or change tiers, simply{' '}`
+  );
 }
 
 function ensureDependencies() {
diff --git a/vendor/zoo-modeling-app/Logo.tsx b/vendor/zoo-modeling-app/Logo.tsx
new file mode 100644
index 000000000..659699233
--- /dev/null
+++ b/vendor/zoo-modeling-app/Logo.tsx
@@ -0,0 +1,49 @@
+import { useEffect, useState, type ImgHTMLAttributes } from 'react'
+
+type BrandingSettings = {
+  siteLogo?: string | null
+  siteLogoDark?: string | null
+  siteName?: string | null
+}
+
+const fallbackLogo = '/default-favicon.ico'
+
+export const Logo = ({
+  className = 'w-auto h-5',
+  ...props
+}: Omit<ImgHTMLAttributes<HTMLImageElement>, 'alt' | 'src'>) => {
+  const [branding, setBranding] = useState<BrandingSettings>({})
+
+  useEffect(() => {
+    const controller = new AbortController()
+
+    fetch('/api/site-settings?scope=branding', {
+      credentials: 'same-origin',
+      signal: controller.signal,
+    })
+      .then((response) => (response.ok ? response.json() : null))
+      .then((settings: BrandingSettings | null) => {
+        if (settings) setBranding(settings)
+      })
+      .catch(() => undefined)
+
+    return () => controller.abort()
+  }, [])
+
+  const logo = branding.siteLogoDark || branding.siteLogo || fallbackLogo
+  const siteName = branding.siteName?.trim() || 'HiCAD'
+
+  return (
+    <img
+      {...props}
+      alt={siteName}
+      className={`${className} object-contain`}
+      onError={(event) => {
+        if (!event.currentTarget.src.endsWith(fallbackLogo)) {
+          event.currentTarget.src = fallbackLogo
+        }
+      }}
+      src={logo}
+    />
+  )
+}
diff --git a/vendor/zoo-modeling-app/localization.ts b/vendor/zoo-modeling-app/localization.ts
new file mode 100644
index 000000000..a5aa1744b
--- /dev/null
+++ b/vendor/zoo-modeling-app/localization.ts
@@ -0,0 +1,182 @@
+const translations = new Map<string, string>([
+  ['3D View', '3D 视图'],
+  ['Add file to project', '添加项目文件'],
+  ['All', '全部'],
+  ['Angularity', '倾斜度'],
+  ['Ask me anything', '有问题尽管问我'],
+  ['Back to HiCAD', '返回 HiCAD'],
+  ['Bodies', '实体'],
+  ['Chamfer', '倒角'],
+  ['Choose your adventure', '选择一种建模方式'],
+  ['Circular Pattern', '圆周阵列'],
+  ['Code', '代码'],
+  ['Code Editor', '代码编辑器'],
+  ['Code-driven CAD', '代码驱动 CAD'],
+  ['Commands', '命令'],
+  ['Connected', '已连接'],
+  ['Connecting and setting up scene...', '正在连接并初始化场景...'],
+  ['Create a new project', '新建项目'],
+  ['Design using traditional point-and-click', '使用传统点击方式设计'],
+  ['Dismiss', '关闭'],
+  ['Edit', '编辑'],
+  ['Export', '导出'],
+  ['Export part', '导出零件'],
+  ['Extrude', '拉伸'],
+  ['Feature Tree', '特征树'],
+  ['Fillet', '圆角'],
+  ['Flip Surface', '翻转曲面'],
+  ['Front plane', '前视基准面'],
+  ['Helix', '螺旋线'],
+  ['Hello there, I\u2019m Zookeeper.', '你好，我是 HiCAD AI 助手。'],
+  ["Hello there, I'm Zookeeper.", '你好，我是 HiCAD AI 助手。'],
+  ['Help', '帮助'],
+  ['Hole', '孔'],
+  ['How would you like to start?', '想从哪里开始？'],
+  ['Insert', '插入'],
+  ['Logs', '日志'],
+  ['Loft', '放样'],
+  ['Mirror', '镜像'],
+  ['No selection', '未选择'],
+  ['No selection.', '未选择。'],
+  ['Offset Plane', '偏移基准面'],
+  ['Open project', '打开项目'],
+  ['Project Files', '项目文件'],
+  ['Publish', '发布'],
+  ['Redo', '重做'],
+  ['Revolve', '旋转'],
+  ['Settings', '设置'],
+  ['Shell', '抽壳'],
+  ['Side plane', '侧视基准面'],
+  ['Sketch', '草图'],
+  ['Split', '分割'],
+  ['Start Sketch', '新建草图'],
+  ['Sweep', '扫掠'],
+  ['Top plane', '顶视基准面'],
+  ['Translate', '平移'],
+  ['Undo', '撤销'],
+  ['Union', '并集'],
+  ['Variables', '变量'],
+  ['View', '视图'],
+  ['View settings', '视图设置'],
+  ['Zookeeper', 'HiCAD AI 助手'],
+  ['Zookeeper, our conversational CAD agent', 'HiCAD 对话式 CAD 助手'],
+  ['Zoom to fit', '缩放至合适大小'],
+])
+
+const translatableAttributes = ['aria-label', 'placeholder', 'title'] as const
+const excludedSelector = [
+  'code',
+  'pre',
+  'script',
+  'style',
+  'textarea',
+  'input',
+  '[contenteditable="true"]',
+  '.cm-editor',
+  '.cm-content',
+  '.cm-line',
+].join(',')
+
+function isExcluded(node: Node) {
+  const element =
+    node.nodeType === Node.ELEMENT_NODE
+      ? (node as Element)
+      : node.parentElement
+  return Boolean(element?.closest(excludedSelector))
+}
+
+function translateTextNode(node: Text) {
+  if (isExcluded(node)) return
+  const value = node.nodeValue || ''
+  const normalized = value.trim()
+  const translated = translations.get(normalized)
+  if (!translated || translated === normalized) return
+
+  const leadingWhitespace = value.match(/^\s*/)?.[0] || ''
+  const trailingWhitespace = value.match(/\s*$/)?.[0] || ''
+  node.nodeValue = `${leadingWhitespace}${translated}${trailingWhitespace}`
+}
+
+function translateElement(element: Element) {
+  if (isExcluded(element)) return
+  for (const attribute of translatableAttributes) {
+    const value = element.getAttribute(attribute)?.trim()
+    if (!value) continue
+    const translated = translations.get(value)
+    if (translated) element.setAttribute(attribute, translated)
+  }
+}
+
+function translateTree(root: Node) {
+  if (root.nodeType === Node.TEXT_NODE) {
+    translateTextNode(root as Text)
+    return
+  }
+
+  if (root.nodeType === Node.ELEMENT_NODE) {
+    translateElement(root as Element)
+  }
+
+  const walker = document.createTreeWalker(
+    root,
+    NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT
+  )
+  let current = walker.nextNode()
+  while (current) {
+    if (current.nodeType === Node.TEXT_NODE) {
+      translateTextNode(current as Text)
+    } else {
+      translateElement(current as Element)
+    }
+    current = walker.nextNode()
+  }
+}
+
+export function installHiCadLocalization() {
+  document.documentElement.lang = 'zh-CN'
+  document.documentElement.dataset.hicadEmbedded = 'true'
+
+  const style = document.createElement('style')
+  style.textContent = `
+    html[data-hicad-embedded='true'] body {
+      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
+    }
+    html[data-hicad-embedded='true'] [data-testid='download-desktop-app'],
+    html[data-hicad-embedded='true'] [data-testid='billing-remaining-bar'],
+    html[data-hicad-embedded='true'] [data-hicad-official-account-link] {
+      display: none !important;
+    }
+  `
+  document.head.appendChild(style)
+
+  translateTree(document.documentElement)
+
+  let frame = 0
+  const pendingRoots = new Set<Node>()
+  const flush = () => {
+    frame = 0
+    for (const root of pendingRoots) translateTree(root)
+    pendingRoots.clear()
+  }
+  const schedule = (root: Node) => {
+    pendingRoots.add(root)
+    if (!frame) frame = window.requestAnimationFrame(flush)
+  }
+
+  const observer = new MutationObserver((mutations) => {
+    for (const mutation of mutations) {
+      if (mutation.type === 'childList') {
+        for (const node of mutation.addedNodes) schedule(node)
+      } else {
+        schedule(mutation.target)
+      }
+    }
+  })
+  observer.observe(document.documentElement, {
+    attributeFilter: [...translatableAttributes],
+    attributes: true,
+    characterData: true,
+    childList: true,
+    subtree: true,
+  })
+}