Bump date-fns from 3.6.0 to 4.4.0 in /frontend (#25)

Bumps [date-fns](https://github.com/date-fns/date-fns) from 3.6.0 to 4.4.0.
- [Release notes](https://github.com/date-fns/date-fns/releases)
- [Commits](date-fns/date-fns@v3.6.0...v4.4.0)

---
updated-dependencies:
- dependency-name: date-fns
  dependency-version: 4.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -25,7 +25,7 @@
     "ace-builds": "^1.44.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "date-fns": "^3.6.0",
+    "date-fns": "^4.4.0",
     "html2canvas": "^1.4.1",
     "lucide-react": "^1.21.0",
     "next": "15.5.19",