chore(ui): upgrade Next.js to version 15.5.7 in package.json and pnpm-lock.yaml

Author: GenerQAQ

src/server/ui/package.json

@@ -41,7 +41,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^0.545.0",
-    "next": "15.5.4",
+    "next": "15.5.7",
     "next-intl": "^4.3.12",
     "next-themes": "^0.4.6",
     "ofetch": "^1.4.1",