feat: downfgrade to next 15

package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev --webpack",
+    "dev": "next dev",
     "build": "next build",
     "start": "next start",
     "lint": "eslint"
@@ -44,7 +44,7 @@
     "framer-motion": "^12.23.24",
     "input-otp": "^1.4.2",
     "lucide-react": "^0.554.0",
-    "next": "^16.0.3",
+    "next": "15.5.6",
     "next-themes": "^0.4.6",
     "react": "^19.2.0",
     "react-day-picker": "^9.11.1",
@@ -66,7 +66,7 @@
     "@typescript-eslint/eslint-plugin": "^8.47.0",
     "@typescript-eslint/parser": "^8.47.0",
     "eslint": "^9.39.1",
-    "eslint-config-next": "^16.0.3",
+    "eslint-config-next": "^15.1.4",
     "eslint-plugin-react": "^7.37.5",
     "eslint-plugin-react-hooks": "^7.0.1",
     "tailwindcss": "^4.1.17",