Fix heading layout in dark theme

[SHASHI9705]

What kind of change does this PR introduce?

Bug fix — Improve the heading layout of the dark theme.

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Issue Number:

Fixes #1992

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Summary of Changes:

• Fixed the heading layout.

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Why This Fix Was Needed:

• Enhances the clarity and quality of content.
• Maintains consistency in UI .

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Checklist:

• My changes follow the project’s coding style.
• I’ve linked the related issue.
• No breaking changes were introduced.
• The fix has been visually verified.
• The PR description follows the required template.

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[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (132af27) to head (73f2d17).
⚠️ Report is 40 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #2011   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines          633       633           
  Branches       196       196           
=========================================
  Hits           633       633           

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