Update next.js to v16

Author: renovate[bot]

package.json

@@ -26,8 +26,8 @@
     "@mdx-js/loader": "^3.1.1",
     "@mdx-js/react": "^3.1.1",
     "@neondatabase/serverless": "^1.0.1",
-    "@next/bundle-analyzer": "15.5.1-canary.31",
-    "@next/mdx": "15.5.1-canary.31",
+    "@next/bundle-analyzer": "16.0.0-canary.18",
+    "@next/mdx": "16.0.0-canary.18",
     "@octokit/graphql": "^9.0.1",
     "@octokit/graphql-schema": "^15.26.0",
     "@radix-ui/react-alert-dialog": "^1.1.15",
@@ -58,7 +58,7 @@
     "geist": "^1.5.1",
     "html-entities": "^2.6.0",
     "lucide-react": "0.542.0",
-    "next": "15.5.1-canary.31",
+    "next": "16.0.0-canary.18",
     "react": "19.1.1",
     "react-activity-calendar": "^2.7.13",
     "react-countup": "^6.5.3",
@@ -110,7 +110,7 @@
     "dotenv": "^17.2.2",
     "drizzle-kit": "^0.31.4",
     "eslint": "^9.35.0",
-    "eslint-config-next": "15.5.1-canary.31",
+    "eslint-config-next": "16.0.0-canary.18",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-css-modules": "^2.12.0",
     "eslint-plugin-drizzle": "^0.2.3",