Bump @sveltejs/kit from 2.8.5 to 2.12.0 in /app

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 2.8.5 to 2.12.0.
- [Release notes](https://github.com/sveltejs/kit/releases)
- [Changelog](https://github.com/sveltejs/kit/blob/main/packages/kit/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/kit/commits/@sveltejs/kit@2.12.0/packages/kit)

---
updated-dependencies:
- dependency-name: "@sveltejs/kit"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

app/package.json

@@ -10,7 +10,7 @@
 	"devDependencies": {
 		"@sveltejs/adapter-auto": "^3.3.1",
 		"@sveltejs/adapter-node": "^5.2.9",
-		"@sveltejs/kit": "^2.8.5",
+		"@sveltejs/kit": "^2.12.0",
 		"@sveltejs/vite-plugin-svelte": "^4.0.2",
 		"svelte": "^5.14.0",
 		"vite": "^5.4.11"