fix(deps): update nextjs monorepo to v16

Author: renovate[bot]

package.json

@@ -47,7 +47,7 @@
     "drizzle-orm": "^0.44.0",
     "eslint-plugin-drizzle": "^0.2.3",
     "lucide-react": "^0.554.0",
-    "next": "15.5.6",
+    "next": "16.0.3",
     "next-themes": "^0.4.6",
     "nodemailer": "^6.10.0",
     "onchange": "^7.1.0",
@@ -66,7 +66,7 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.1",
     "@eslint/js": "^9.23.0",
-    "@next/eslint-plugin-next": "^15.2.4",
+    "@next/eslint-plugin-next": "^16.0.0",
     "@tailwindcss/postcss": "^4.0.15",
     "@tanstack/eslint-plugin-query": "^5.68.0",
     "@trivago/prettier-plugin-sort-imports": "^5.2.2",
@@ -78,7 +78,7 @@
     "@typescript-eslint/parser": "^8.28.0",
     "drizzle-kit": "^0.31.0",
     "eslint": "^9.23.0",
-    "eslint-config-next": "15.5.6",
+    "eslint-config-next": "16.0.3",
     "eslint-plugin-react-hooks": "^5.2.0",
     "prettier": "^3.5.3",
     "prettier-plugin-organize-attributes": "^1.0.0",