chore: 降级next和eslint-config-next版本至15.2.6

更新package.json和package-lock.json中的依赖版本，确保next和eslint-config-next版本一致

web/package.json

@@ -33,7 +33,7 @@
     "i18next": "^25.4.1",
     "i18next-resources-to-backend": "^1.2.1",
     "lucide-react": "^0.424.0",
-    "next": "15.5.9",
+    "next": "15.2.6",
     "next-language-detector": "^1.1.0",
     "next-sitemap": "^4.2.3",
     "postcss": "^8.4.40",
@@ -56,7 +56,7 @@
     "@tailwindcss/typography": "^0.5.13",
     "drizzle-kit": "^0.31.4",
     "eslint": "^8.57.0",
-    "eslint-config-next": "15.5.9",
+    "eslint-config-next": "^15.2.6",
     "prettier": "^3.3.3",
     "prettier-plugin-tailwindcss": "^0.6.5",
     "tsx": "^4.20.4"