diff --git a/apps/haotool/src/components/Layout.tsx b/apps/haotool/src/components/Layout.tsx
index 911313fd9..bfd17b28b 100644
--- a/apps/haotool/src/components/Layout.tsx
+++ b/apps/haotool/src/components/Layout.tsx
@@ -9,6 +9,7 @@ import { LazyMotion, MotionConfig } from 'motion/react';
 import Header from './Header';
 import Footer from './Footer';
 import { VercelAnalytics } from '@app/shared/analytics';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 
 const loadMotionFeatures = () => import('./motion-features').then((module) => module.default);
 
@@ -49,6 +50,7 @@ export default function Layout() {
             prefers-reduced-motion。 */}
         <ScrollRestoration />
         <VercelAnalytics />
+        <SpeedInsights />
       </MotionConfig>
     </LazyMotion>
   );
diff --git a/apps/nihonname/src/components/Layout.tsx b/apps/nihonname/src/components/Layout.tsx
index 541f6d043..652b2b82f 100644
--- a/apps/nihonname/src/components/Layout.tsx
+++ b/apps/nihonname/src/components/Layout.tsx
@@ -6,6 +6,7 @@
 import { Outlet, useLocation } from 'react-router-dom';
 import { HelmetProvider } from '../utils/helmet';
 import { VercelAnalytics } from '@app/shared/analytics';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 
 export function Layout() {
   const location = useLocation();
@@ -37,6 +38,7 @@ export function Layout() {
         <Outlet />
       </main>
       <VercelAnalytics />
+      <SpeedInsights />
     </HelmetProvider>
   );
 }
diff --git a/apps/papertrade/src/App.tsx b/apps/papertrade/src/App.tsx
index fa6f9db83..a32e88cd9 100644
--- a/apps/papertrade/src/App.tsx
+++ b/apps/papertrade/src/App.tsx
@@ -1,4 +1,5 @@
 import { createBrowserRouter, RouterProvider } from 'react-router-dom';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 import { routes } from './routes';
 
 const router = createBrowserRouter(routes, {
@@ -6,5 +7,10 @@ const router = createBrowserRouter(routes, {
 });
 
 export default function App() {
-  return <RouterProvider router={router} />;
+  return (
+    <>
+      <RouterProvider router={router} />
+      <SpeedInsights />
+    </>
+  );
 }
diff --git a/apps/park-keeper/src/components/Layout.tsx b/apps/park-keeper/src/components/Layout.tsx
index ff99f06d6..b04c36e4e 100644
--- a/apps/park-keeper/src/components/Layout.tsx
+++ b/apps/park-keeper/src/components/Layout.tsx
@@ -5,6 +5,7 @@ import { getStoredLanguage } from '../services/i18n';
 import { SITE_CONFIG } from '../../app.config.mjs';
 import { UpdatePrompt } from './UpdatePrompt';
 import { VercelAnalytics } from '@app/shared/analytics';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 
 const APP_NAME = SITE_CONFIG.name;
 const CURRENT_YEAR = 2026;
@@ -37,6 +38,7 @@ export default function Layout() {
       {/* 全域掛載：確保 /add 捷徑、/guide、/about 等非 Home 路由也能自動消費 waiting SW（issue #725 pre-release 稽核 C-P0）。 */}
       <UpdatePrompt />
       <VercelAnalytics />
+      <SpeedInsights />
       {showFooter && (
         <footer className="py-4 px-6 text-center border-t border-black/5">
           {/* slate-600（R6 review /about 處方）：slate-500 on 白 4.76 壓線、slate-400 僅 2.45:1。 */}
diff --git a/apps/quake-school/src/components/Layout.tsx b/apps/quake-school/src/components/Layout.tsx
index 0a1e9c4e1..32bc928ca 100644
--- a/apps/quake-school/src/components/Layout.tsx
+++ b/apps/quake-school/src/components/Layout.tsx
@@ -4,6 +4,7 @@
 import { Outlet } from 'react-router-dom';
 import { Helmet, HelmetProvider } from 'react-helmet-async';
 import { VercelAnalytics } from '@app/shared/analytics';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 
 const Layout: React.FC = () => {
   return (
@@ -20,6 +21,7 @@ const Layout: React.FC = () => {
         <Outlet />
       </main>
       <VercelAnalytics />
+      <SpeedInsights />
     </HelmetProvider>
   );
 };
diff --git a/apps/ratewise/src/components/Layout.tsx b/apps/ratewise/src/components/Layout.tsx
index 8b65824e2..72a0e904b 100644
--- a/apps/ratewise/src/components/Layout.tsx
+++ b/apps/ratewise/src/components/Layout.tsx
@@ -12,6 +12,7 @@ import { Footer } from './Footer';
 import { useUrlNormalization } from '../hooks/useUrlNormalization';
 import { NonCriticalLazyBoundary } from './NonCriticalLazyBoundary';
 import { PwaAppReadyBeacon } from './PwaAppReadyBeacon';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 
 const DecemberTheme = React.lazy(() => import('../features/calculator/easter-eggs/DecemberTheme'));
 
@@ -89,6 +90,9 @@ export function Layout({ children }: { children: React.ReactNode }) {
             <DecemberTheme />
           </React.Suspense>
         )}
+
+        {/* Vercel Speed Insights */}
+        <SpeedInsights />
       </HelmetProvider>
     </React.StrictMode>
   );
diff --git a/apps/split-meow/src/App.tsx b/apps/split-meow/src/App.tsx
index 740432b9a..1f759404d 100644
--- a/apps/split-meow/src/App.tsx
+++ b/apps/split-meow/src/App.tsx
@@ -13,6 +13,7 @@ import { CatPlayLayer, type Particle } from './components/CatPlayLayer';
 import { makePawParticle, makeCelebrateParticles } from './lib/catPlay';
 import { useCurrencyAutoDetect } from './hooks/useCurrencyAutoDetect';
 import { VercelAnalytics } from '@app/shared/analytics';
+import { SpeedInsights } from '@vercel/speed-insights/react';
 
 function ShareButton() {
   const { t } = useTranslation();
@@ -140,6 +141,7 @@ export default function App() {
       <BottomNav />
       <UpdatePrompt />
       <VercelAnalytics />
+      <SpeedInsights />
 
       {/* Cat Play Mode overlays */}
       {catPlayMode && <CatCompanion />}
diff --git a/apps/starpuff/src/main.ts b/apps/starpuff/src/main.ts
index 7db3f603c..79893b3e5 100644
--- a/apps/starpuff/src/main.ts
+++ b/apps/starpuff/src/main.ts
@@ -1,5 +1,6 @@
 import Phaser from 'phaser';
 import { inject } from '@vercel/analytics';
+import { injectSpeedInsights } from '@vercel/speed-insights';
 import './pwa';
 import './style.css';
 import { initInstallGuide } from './installGuide';
@@ -33,6 +34,7 @@ import { isGamePaused, openPauseMenu } from './game/systems/pause';
 
 restoreMutePreference();
 inject();
+injectSpeedInsights();
 // 桌機正置（#817）：boot 一次判定掛 sp-desktop class——旋轉殼旁路（CSS transform 免除
 // ＋getShellRotation 恆 none）、虛擬鍵隱藏；Phaser boot 前套用使殼量測即為正置尺寸。
 applyDesktopModeClass();
@@ -460,7 +462,7 @@ if (import.meta.env.DEV || import.meta.env.MODE === 'test') {
         state: string | null;
         safeSupply: boolean;
       }[] = [];
-      // 場景轉換瞬間（Result/restart）內部系統短暫不可用：防禦回空（審查修復）。
+      // 場景轉換瞬間（Result/restart）內部系統短暫不可用：防禦回空（審查修復）���
       try {
         for (const child of internals().enemies.getGroup().getChildren()) {
           const kind = internals().enemies.kindOf(child);
diff --git a/package.json b/package.json
index aa4a5a11c..161fa41dc 100644
--- a/package.json
+++ b/package.json
@@ -182,5 +182,8 @@
     "patchedDependencies": {
       "vite-react-ssg@0.8.9": "patches/vite-react-ssg@0.8.9.patch"
     }
+  },
+  "dependencies": {
+    "@vercel/speed-insights": "^2.0.0"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 83f1a7162..ba783984b 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -69,6 +69,10 @@ patchedDependencies:
 importers:
 
   .:
+    dependencies:
+      '@vercel/speed-insights':
+        specifier: ^2.0.0
+        version: 2.0.0(react@19.2.7)(vue@3.5.40(typescript@5.9.3))
     devDependencies:
       '@changesets/changelog-github':
         specifier: ^0.6.0
@@ -3937,6 +3941,32 @@ packages:
       vue-router:
         optional: true
 
+  '@vercel/speed-insights@2.0.0':
+    resolution: {integrity: sha512-jwkNcrTeafWxjmWq4AHBaptSqZiJkYU5adLC9QBSqeim0GcqDMgN5Ievh8OG1rJ6W3A4l1oiP7qr9CWxGuzu3w==}
+    peerDependencies:
+      '@sveltejs/kit': ^1 || ^2
+      next: '>= 13'
+      nuxt: '>= 3'
+      react: ^18 || ^19 || ^19.0.0-rc
+      svelte: '>= 4'
+      vue: ^3
+      vue-router: ^4
+    peerDependenciesMeta:
+      '@sveltejs/kit':
+        optional: true
+      next:
+        optional: true
+      nuxt:
+        optional: true
+      react:
+        optional: true
+      svelte:
+        optional: true
+      vue:
+        optional: true
+      vue-router:
+        optional: true
+
   '@vitejs/plugin-react@6.0.3':
     resolution: {integrity: sha512-vmFvco5/QuC2f9Oj+wTk0+9XeDFkHxSamwZKYc7MxYwKICfvUvlMhqKI0VuICPltGqh1neqBKDvO4kes1ya8vg==}
     engines: {node: ^20.19.0 || >=22.12.0}
@@ -12541,6 +12571,11 @@ snapshots:
       react: 19.2.7
       vue: 3.5.40(typescript@5.9.3)
 
+  '@vercel/speed-insights@2.0.0(react@19.2.7)(vue@3.5.40(typescript@5.9.3))':
+    optionalDependencies:
+      react: 19.2.7
+      vue: 3.5.40(typescript@5.9.3)
+
   '@vitejs/plugin-react@6.0.3(vite@8.1.5(@types/node@24.13.3)(esbuild@0.27.7)(jiti@1.21.7)(terser@5.49.0)(yaml@2.8.3))':
     dependencies:
       '@rolldown/pluginutils': 1.0.1