Integrate CMS with Marketing Solutions page

Links the marketing solutions frontend page to the Payload CMS Pages
collection via the new API library. Removes legacy static portfolio
routes and components to consolidate marketing content. Enhances the
Header and Footer Astro components with improved responsive styling.

apps/frontend/package.json

@@ -17,8 +17,9 @@
     "@tailwindcss/vite": "^4.1.14",
     "agentation": "^2.1.1",
     "agentation-mcp": "^1.1.0",
-    "astro": "6.0.0-beta.1",
-    "better-auth": "^1.3.13"
+    "astro": "6.0.0-beta.17",
+    "better-auth": "^1.3.13",
+    "isomorphic-dompurify": "^3.0.0"
   },
   "devDependencies": {
     "@astrojs/check": "^0.9.6",