diff --git a/apps/backend/package.json b/apps/backend/package.json
index 950f8d0..8099b7c 100644
--- a/apps/backend/package.json
+++ b/apps/backend/package.json
@@ -20,17 +20,20 @@
     "start": "cross-env NODE_OPTIONS=--no-deprecation next start",
     "test": "pnpm run test:int && pnpm run test:e2e",
     "test:e2e": "cross-env NODE_OPTIONS=\"--no-deprecation --no-experimental-strip-types\" pnpm exec playwright test --config=playwright.config.ts",
-    "test:int": "cross-env NODE_OPTIONS=--no-deprecation vitest run --config ./vitest.config.mts"
+    "test:int": "cross-env NODE_OPTIONS=--no-deprecation vitest run --config ./vitest.config.mts",
+    "test:load": "k6 run tests/k6/public-browsing.js",
+    "test:load:all": "k6 run tests/k6/public-browsing.js && k6 run tests/k6/api-performance.js",
+    "test:load:admin": "k6 run tests/k6/admin-operations.js",
+    "test:load:api": "k6 run tests/k6/api-performance.js",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
-    "@opennextjs/cloudflare": "^1.10.1",
+    "@enchun/shared": "workspace:*",
     "@payloadcms/admin-bar": "3.59.1",
     "@payloadcms/db-mongodb": "3.59.1",
     "@payloadcms/email-resend": "3.59.1",
     "@payloadcms/live-preview-react": "3.59.1",
     "@payloadcms/next": "3.59.1",
-    "@payloadcms/payload-cloud": "3.59.1",
-    "@payloadcms/plugin-form-builder": "3.59.1",
     "@payloadcms/plugin-nested-docs": "3.59.1",
     "@payloadcms/plugin-redirects": "3.59.1",
     "@payloadcms/plugin-search": "3.59.1",
@@ -58,8 +61,7 @@
     "react-hook-form": "7.45.4",
     "sharp": "0.34.2",
     "tailwind-merge": "^2.3.0",
-    "tailwindcss-animate": "^1.0.7",
-    "@enchun/shared": "workspace:*"
+    "tailwindcss-animate": "^1.0.7"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",
diff --git a/apps/backend/src/Footer/hooks/revalidateFooter.ts b/apps/backend/src/Footer/hooks/revalidateFooter.ts
index df3acec..8641664 100644
--- a/apps/backend/src/Footer/hooks/revalidateFooter.ts
+++ b/apps/backend/src/Footer/hooks/revalidateFooter.ts
@@ -1,13 +1,27 @@
 import type { GlobalAfterChangeHook } from 'payload'
 
 import { revalidateTag } from 'next/cache'
+import { auditLogger } from '@/utilities/auditLogger'
 
-export const revalidateFooter: GlobalAfterChangeHook = ({ doc, req: { payload, context } }) => {
+export const revalidateFooter: GlobalAfterChangeHook = async ({ doc, req }) => {
+  const { payload, context } = req
   if (!context.disableRevalidate) {
     payload.logger.info(`Revalidating footer`)
 
     revalidateTag('global_footer')
   }
 
+  // 記錄 Footer 變更
+  if (req.user) {
+    await auditLogger(req, {
+      action: 'update',
+      collection: 'global_footer',
+      userId: req.user.id,
+      userName: req.user.name as string,
+      userEmail: req.user.email as string,
+      userRole: req.user.role as string,
+    })
+  }
+
   return doc
 }
diff --git a/apps/backend/src/Header/hooks/revalidateHeader.ts b/apps/backend/src/Header/hooks/revalidateHeader.ts
index efe176a..8af7ff2 100644
--- a/apps/backend/src/Header/hooks/revalidateHeader.ts
+++ b/apps/backend/src/Header/hooks/revalidateHeader.ts
@@ -1,13 +1,27 @@
 import type { GlobalAfterChangeHook } from 'payload'
 
 import { revalidateTag } from 'next/cache'
+import { auditLogger } from '@/utilities/auditLogger'
 
-export const revalidateHeader: GlobalAfterChangeHook = ({ doc, req: { payload, context } }) => {
+export const revalidateHeader: GlobalAfterChangeHook = async ({ doc, req }) => {
+  const { payload, context } = req
   if (!context.disableRevalidate) {
     payload.logger.info(`Revalidating header`)
 
     revalidateTag('global_header')
   }
 
+  // 記錄 Header 變更
+  if (req.user) {
+    await auditLogger(req, {
+      action: 'update',
+      collection: 'global_header',
+      userId: req.user.id,
+      userName: req.user.name as string,
+      userEmail: req.user.email as string,
+      userRole: req.user.role as string,
+    })
+  }
+
   return doc
 }
diff --git a/apps/backend/tsconfig.json b/apps/backend/tsconfig.json
index 5ca2e4a..d2a096d 100644
--- a/apps/backend/tsconfig.json
+++ b/apps/backend/tsconfig.json
@@ -1,51 +1,55 @@
 {
   "compilerOptions": {
-    "strict": true,
-    "baseUrl": ".",
-    "esModuleInterop": true,
     "target": "ES2022",
+    "module": "ESNext",
     "lib": [
-      "DOM",
-      "DOM.Iterable",
       "ES2022"
     ],
-    "allowJs": true,
-    "skipLibCheck": true,
-    "noEmit": true,
-    "incremental": true,
-    "jsx": "preserve",
-    "module": "esnext",
-    "moduleResolution": "bundler",
+    "moduleResolution": "Bundler",
     "resolveJsonModule": true,
-    "sourceMap": true,
-    "isolatedModules": true,
+    "allowJs": false,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "jsx": "preserve",
+    "baseUrl": ".",
+    "paths": {
+      "@/*": [
+        "./src/*"
+      ],
+      "@payload-config": [
+        "./src/payload.config"
+      ]
+    },
     "plugins": [
       {
         "name": "next"
       }
     ],
-    "paths": {
-      "@payload-config": [
-        "./src/payload.config.ts"
-      ],
-      "react": [
-        "./node_modules/@types/react"
-      ],
-      "@/*": [
-        "./src/*"
-      ],
-    }
+    "noEmit": true,
+    "incremental": true,
+    "isolatedModules": true
   },
   "include": [
-    "**/*.ts",
-    "**/*.tsx",
-    ".next/types/**/*.ts",
-    "redirects.js",
-    "next-env.d.ts",
+    "src/**/*",
     "next.config.js",
-    "next-sitemap.config.cjs"
+    ".next/types/**/*.ts"
   ],
   "exclude": [
-    "node_modules"
-  ],
+    "node_modules",
+    ".next",
+    "dist",
+    "tests/**/*",
+    "**/__tests__/**/*",
+    "**/*.spec.ts",
+    "**/*.test.ts",
+    "vitest.config.mts",
+    "playwright.config.ts"
+  ]
 }
diff --git a/apps/backend/vitest.config.mts b/apps/backend/vitest.config.mts
index f4d8caa..91f1dd0 100644
--- a/apps/backend/vitest.config.mts
+++ b/apps/backend/vitest.config.mts
@@ -1,9 +1,15 @@
 import { defineConfig } from 'vitest/config'
 import react from '@vitejs/plugin-react'
 import tsconfigPaths from 'vite-tsconfig-paths'
+import path from 'node:path'
 
 export default defineConfig({
   plugins: [tsconfigPaths(), react()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
   test: {
     environment: 'jsdom',
     setupFiles: ['./vitest.setup.ts'],
diff --git a/apps/frontend/astro.config.mjs b/apps/frontend/astro.config.mjs
index 9da5dd1..2e63b0a 100644
--- a/apps/frontend/astro.config.mjs
+++ b/apps/frontend/astro.config.mjs
@@ -6,7 +6,13 @@ import tailwindcss from "@tailwindcss/vite";
 // https://astro.build/config
 export default defineConfig({
   output: "server",
-  adapter: cloudflare(),
+  adapter: cloudflare({
+    imageService: 'passthrough',
+    platformProxy: {
+      enabled: true,
+      configPath: './wrangler.jsonc',
+    },
+  }),
   vite: {
     plugins: [tailwindcss()],
     server: {
@@ -19,7 +25,4 @@ export default defineConfig({
       },
     },
   },
-  typescript: {
-    strict: true,
-  },
 });
diff --git a/apps/frontend/package.json b/apps/frontend/package.json
index 03ab97b..35627fc 100644
--- a/apps/frontend/package.json
+++ b/apps/frontend/package.json
@@ -9,18 +9,21 @@
     "build": "astro build",
     "preview": "astro preview",
     "check": "astro check",
-    "deploy": "wrangler pages deploy dist"
+    "typecheck": "astro check",
+    "deploy": "wrangler deploy"
   },
   "dependencies": {
-    "@astrojs/cloudflare": "^12.6.9",
+    "@astrojs/cloudflare": "^12.6.12",
     "@tailwindcss/vite": "^4.1.14",
-    "astro": "^5.14.1",
+    "astro": "6.0.0-beta.1",
     "better-auth": "^1.3.13"
   },
   "devDependencies": {
+    "@astrojs/check": "^0.9.6",
     "@tailwindcss/typography": "^0.5.19",
     "autoprefixer": "^10.4.0",
     "tailwindcss": "^4.1.14",
-    "typescript": "^5.4.0"
+    "typescript": "^5.7.3",
+    "wrangler": "^4.59.2"
   }
-}
+}
\ No newline at end of file
diff --git a/apps/frontend/src/components/Footer.astro b/apps/frontend/src/components/Footer.astro
index 1cb77cc..2cac6e0 100644
--- a/apps/frontend/src/components/Footer.astro
+++ b/apps/frontend/src/components/Footer.astro
@@ -51,6 +51,13 @@ import { Image } from 'astro:assets';
 
 <script>
   // Client-side data fetching for footer
+  interface LinkItem {
+    link?: {
+      url?: string;
+      label?: string;
+    };
+  }
+
   async function loadFooterData() {
     try {
       console.log('Fetching footer data...');
@@ -61,7 +68,7 @@ import { Image } from 'astro:assets';
       // Update marketing solutions
       const marketingUl = document.getElementById('marketing-solutions');
       if (marketingUl && data.navItems?.[0]?.childNavItems) {
-        const links = data.navItems[0].childNavItems.map(item =>
+        const links = data.navItems[0].childNavItems.map((item: LinkItem) =>
           `<li><a href="${item.link?.url || '#'}" class="font-normal text-[var(--color-st-tropaz)] hover:text-[var(--color-dove-gray)] transition-colors">${item.link?.label}</a></li>`
         ).join('');
         marketingUl.innerHTML = links;
@@ -70,7 +77,7 @@ import { Image } from 'astro:assets';
       // Update marketing articles (行銷放大鏡)
       const articlesUl = document.getElementById('marketing-articles');
       if (articlesUl && data.navItems?.[1]?.childNavItems) {
-        const links = data.navItems[1].childNavItems.map(item =>
+        const links = data.navItems[1].childNavItems.map((item: LinkItem) =>
           `<li><a href="${item.link?.url || '#'}" class="font-normal text-[var(--color-st-tropaz)] hover:text-[var(--color-dove-gray)] transition-colors">${item.link?.label}</a></li>`
         ).join('');
         articlesUl.innerHTML = links;
diff --git a/apps/frontend/src/components/Header.astro b/apps/frontend/src/components/Header.astro
index 915dbcf..fd01fc9 100644
--- a/apps/frontend/src/components/Header.astro
+++ b/apps/frontend/src/components/Header.astro
@@ -135,7 +135,7 @@ import { Image } from "astro:assets";
             mobileNav.innerHTML = "";
 
             // Populate desktop navigation
-            navItems.forEach((item) => {
+            navItems.forEach((item: NavItem) => {
                 const linkHtml = createNavLink(item);
                 const li = document.createElement("li");
                 li.innerHTML = linkHtml;
@@ -143,7 +143,7 @@ import { Image } from "astro:assets";
             });
 
             // Populate mobile navigation
-            navItems.forEach((item) => {
+            navItems.forEach((item: NavItem) => {
                 const linkHtml = createNavLink(item)
                     .replace("px-3 py-2", "block px-3 py-2")
                     .replace(
diff --git a/apps/frontend/src/middleware.ts b/apps/frontend/src/middleware.ts
index da0b7a0..d3ae460 100644
--- a/apps/frontend/src/middleware.ts
+++ b/apps/frontend/src/middleware.ts
@@ -15,7 +15,7 @@ export const onRequest = defineMiddleware(async (context, next) => {
     }
 
     // Validate token
-    authService.token = token;
+    authService.setToken(token);
     const user = await authService.getCurrentUser();
 
     if (!user) {
diff --git a/apps/frontend/src/services/auth.ts b/apps/frontend/src/services/auth.ts
index 8fd86e4..c3c388b 100644
--- a/apps/frontend/src/services/auth.ts
+++ b/apps/frontend/src/services/auth.ts
@@ -61,6 +61,7 @@ export class AuthService {
   }
 
   async logout(): Promise<void> {
+    const tokenForRequest = this.token;
     this.token = null;
     if (typeof window !== 'undefined') {
       localStorage.removeItem('payload-token');
@@ -68,17 +69,25 @@ export class AuthService {
 
     // Optional: Call logout endpoint
     try {
+      const headers: Record<string, string> = {
+        'Content-Type': 'application/json',
+      };
+      if (tokenForRequest) {
+        headers['Authorization'] = `Bearer ${tokenForRequest}`;
+      }
       await fetch(`${PAYLOAD_URL}/api/users/logout`, {
         method: 'POST',
-        headers: {
-          ...(this.token && { 'Authorization': `Bearer ${this.token}` }),
-        },
+        headers,
       });
     } catch (error) {
       // Ignore logout errors
     }
   }
 
+  setToken(token: string): void {
+    this.token = token;
+  }
+
   async getCurrentUser(): Promise<User | null> {
     if (!this.token) return null;
 
diff --git a/apps/frontend/tsconfig.json b/apps/frontend/tsconfig.json
index d1a453b..040b811 100644
--- a/apps/frontend/tsconfig.json
+++ b/apps/frontend/tsconfig.json
@@ -5,5 +5,6 @@
     "paths": {
       "@shared/*": ["../packages/shared/src/*"]
     }
-  }
+  },
+  "exclude": ["node_modules", "dist", "tests"]
 }
diff --git a/package.json b/package.json
index 5a67644..5b4dea5 100644
--- a/package.json
+++ b/package.json
@@ -8,11 +8,13 @@
     "build": "turbo run build",
     "lint": "turbo run lint",
     "test": "turbo run test",
+    "typecheck": "turbo run typecheck",
     "bmad:refresh": "bmad-method install -f -i codex",
     "bmad:list": "bmad-method list:agents",
     "bmad:validate": "bmad-method validate"
   },
   "devDependencies": {
+    "eslint-plugin-react-hooks": "^7.0.1",
     "turbo": "^2.0.5"
   },
   "pnpm": {
diff --git a/packages/shared/tsconfig.json b/packages/shared/tsconfig.json
index 968efc5..cc094b0 100644
--- a/packages/shared/tsconfig.json
+++ b/packages/shared/tsconfig.json
@@ -5,10 +5,17 @@
     "declarationDir": "dist",
     "emitDeclarationOnly": true,
     "module": "ES2020",
-    "moduleResolution": "Node",
+    "moduleResolution": "Bundler",
     "target": "ES2020",
     "rootDir": "src",
-    "outDir": "dist"
+    "outDir": "dist",
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
   },
   "include": ["src/**/*"]
 }
diff --git a/turbo.json b/turbo.json
index 22f8f0c..cc62434 100644
--- a/turbo.json
+++ b/turbo.json
@@ -18,6 +18,10 @@
     },
     "check": {
       "outputs": []
+    },
+    "typecheck": {
+      "dependsOn": ["^typecheck"],
+      "outputs": []
     }
   }
 }