chore(deps): bump the npm_and_yarn group across 1 directory with 3 updates

Bumps the npm_and_yarn group with 2 updates in the /frontend directory: [postcss](https://github.com/postcss/postcss) and [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite).


Updates `postcss` from 8.5.8 to 8.5.10
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.5.8...8.5.10)

Updates `vite` from 5.4.21 to 6.4.3
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v6.4.3/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v6.4.3/packages/vite)

Updates `esbuild` from 0.21.5 to 0.25.12
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG-2024.md)
- [Commits](https://github.com/evanw/esbuild/compare/v0.21.5...v0.25.12)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.10
  dependency-type: direct:development
  dependency-group: npm_and_yarn
- dependency-name: vite
  dependency-version: 6.4.3
  dependency-type: direct:development
  dependency-group: npm_and_yarn
- dependency-name: esbuild
  dependency-version: 0.25.12
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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

frontend/package.json

@@ -24,10 +24,10 @@
     "@types/react-dom": "^18.3.7",
     "@vitejs/plugin-react": "4",
     "autoprefixer": "^10.4.27",
-    "postcss": "^8.5.8",
+    "postcss": "^8.5.10",
     "tailwindcss": "^3.4.19",
     "typescript": "^5.9.3",
-    "vite": "^5.4.21",
+    "vite": "^6.4.3",
     "vite-plugin-javascript-obfuscator": "^3.1.0"
   }
 }