build(deps-dev): bump @types/node from 25.9.2 to 26.2.0 in /frontend

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 25.9.2 to 26.2.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-version: 26.2.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

frontend/package.json

@@ -69,7 +69,7 @@
   },
   "devDependencies": {
     "@types/crypto-js": "^4.2.2",
-    "@types/node": "^25",
+    "@types/node": "^26",
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "autoprefixer": "^10.5.4",