Bump @mantine/modals from 7.13.2 to 8.3.6 in /app

Bumps [@mantine/modals](https://github.com/mantinedev/mantine/tree/HEAD/packages/@mantine/modals) from 7.13.2 to 8.3.6.
- [Release notes](https://github.com/mantinedev/mantine/releases)
- [Changelog](https://github.com/mantinedev/mantine/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mantinedev/mantine/commits/8.3.6/packages/@mantine/modals)

---
updated-dependencies:
- dependency-name: "@mantine/modals"
  dependency-version: 8.3.6
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

app/package.json

@@ -36,7 +36,7 @@
     "@codemirror/view": "^6.38.6",
     "@mantine/core": "^7.13.2",
     "@mantine/hooks": "^7.13.2",
-    "@mantine/modals": "^7.13.2",
+    "@mantine/modals": "^8.3.6",
     "@mantine/notifications": "^7.13.2",
     "@react-hook/resize-observer": "^2.0.2",
     "@tabler/icons-react": "^3.35.0",