build(deps-dev): bump vite-plugin-static-copy in /frontend

Bumps [vite-plugin-static-copy](https://github.com/sapphi-red/vite-plugin-static-copy) from 3.1.3 to 3.1.4.
- [Release notes](https://github.com/sapphi-red/vite-plugin-static-copy/releases)
- [Changelog](https://github.com/sapphi-red/vite-plugin-static-copy/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sapphi-red/vite-plugin-static-copy/compare/vite-plugin-static-copy@3.1.3...vite-plugin-static-copy@3.1.4)

---
updated-dependencies:
- dependency-name: vite-plugin-static-copy
  dependency-version: 3.1.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package.json

@@ -85,7 +85,7 @@
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.46.0",
     "vite": "^7.1.9",
-    "vite-plugin-static-copy": "^3.1.3",
+    "vite-plugin-static-copy": "^3.1.4",
     "vite-tsconfig-paths": "^5.1.4"
   },
   "type": "module",