migrate to nextjs

package.json

@@ -4,28 +4,24 @@
   "version": "0.1.0",
   "description": "Technical problem solver's blog - practical insights and learning notes",
   "scripts": {
-    "dev": "astro dev",
-    "build": "astro build",
-    "preview": "astro preview",
-    "astro": "astro",
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint",
     "test": "npm run test:smoke",
     "test:smoke": "tsx ./scripts/smoke-test.ts",
     "test:links": "tsx ./scripts/test-links.ts",
     "test:file-examples": "tsx ./scripts/test-file-examples-comprehensive.ts"
   },
   "dependencies": {
-    "@astrojs/mdx": "^4.3.13",
-    "@astrojs/react": "^4.4.2",
-    "@astrojs/sitemap": "^3.6.1",
-    "@astrojs/tailwind": "^6.0.2",
     "@types/ioredis": "^4.28.10",
     "@types/react": "^19.2.8",
     "@types/react-dom": "^19.2.3",
     "@vercel/og": "^0.8.6",
-    "astro": "^5.16.8",
     "ioredis": "^5.9.1",
     "lucide-react": "^0.468.0",
     "mermaid": "^11.12.2",
+    "next": "^16.1.6",
     "prismjs": "^1.30.0",
     "react": "^19.2.3",
     "react-dom": "^19.2.3",