fix(deps): update nextjs monorepo to v16

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "livekit-client": "^2.7.5",
     "livekit-server-sdk": "^2.9.3",
     "lucide-react": "^0.555.0",
-    "next": "15.5.6",
+    "next": "16.0.6",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "tailwind-merge": "^2.5.5"
@@ -29,7 +29,7 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "eslint": "^9",
-    "eslint-config-next": "15.5.6",
+    "eslint-config-next": "16.0.6",
     "postcss": "^8",
     "prettier": "3.7.3",
     "tailwindcss": "^3.4.1",