build(deps-dev): bump unocss from 65.5.0 to 66.0.0 in /frontend

Bumps [unocss](https://github.com/unocss/unocss/tree/HEAD/packages-presets/unocss) from 65.5.0 to 66.0.0.
- [Release notes](https://github.com/unocss/unocss/releases)
- [Commits](https://github.com/unocss/unocss/commits/v66.0.0/packages-presets/unocss)

---
updated-dependencies:
- dependency-name: unocss
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

frontend/package.json

@@ -50,7 +50,7 @@
     "nyc": "^17.1.0",
     "prettier": "3.5.0",
     "typescript": "^5.7.3",
-    "unocss": "^65.5.0",
+    "unocss": "^66.0.0",
     "unplugin-auto-import": "^19.0.0",
     "unplugin-vue-components": "^28.0.0",
     "vite-plugin-istanbul": "^6.0.2",