fix(settings): update dark mode divider color for better contrast

[rohitpaulk]

Change the divider color in dark mode from a solid gray to a
semi-transparent white. This improves visibility and maintains
consistency with the updated dark theme styling.

---

Note

Adjusts the dark theme styling for the settings form divider.

• In app/components/settings/form-divider.hbs, replace dark:bg-gray-900 with dark:bg-white/5 to improve visibility and align with updated dark theme

^{Written by Cursor Bugbot for commit 6bd8637. This will update automatically on new commits. Configure here.}

[github-actions]

Test Results

  1 files  ±0    1 suites  ±0   7m 9s ⏱️ -4s
699 tests ±0  644 ✅ ±0  55 💤 ±0  0 ❌ ±0 
714 runs  ±0  659 ✅ ±0  55 💤 ±0  0 ❌ ±0 

Results for commit 6bd8637. ± Comparison against base commit 5ece186.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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