Bump vite from 6.4.1 to 7.3.1 in /js-applet

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 6.4.1 to 7.3.1.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/main/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v7.3.1/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 7.3.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

js-applet/package.json

@@ -21,7 +21,7 @@
     "@vitejs/plugin-react": "^4.5.2",
     "concurrently": "^9.2.1",
     "typescript": "5.9.3",
-    "vite": "^6.3.5",
+    "vite": "^7.3.1",
     "vite-plugin-singlefile": "^2.3.0",
     "vitest": "^4.0.0"
   },