Upgrade Next.js to 15.5.9 and eslint-config-next to 15.5.9

Co-authored-by: gkorland <753206+gkorland@users.noreply.github.com>

Author: Copilot

package-lock.json

@@ -23,7 +23,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.0",
     "lucide-react": "^0.441.0",
-    "next": "^15.5.7",
+    "next": "^15.5.9",
     "playwright": "^1.49.1",
     "react": "^18",
     "react-dom": "^18",
@@ -42,7 +42,7 @@
     "@types/react-dom": "^18",
     "@types/react-syntax-highlighter": "^15.5.13",
     "eslint": "^9",
-    "eslint-config-next": "^15.1.2",
+    "eslint-config-next": "^15.5.9",
     "tailwindcss": "^3.4.3",
     "typescript": "^5"
   }