UI: Add 8.0 top padding to library browse screen header

[mattsigal]

Pull Request

Summary

This aligns the title text height on library browse screens (such as Home Movies and Playlists) with the music/audio browse screen header, resolving the issue where the library header was placed too high on TV and mobile layouts.

Add 8.0 top padding to library browse screen header to align it with the music/audio browse screen header, resolving the issue where the library header was placed too high on TV and mobile layouts.

Related Issues

Link related issues or tickets separated by commas.

• Closes #
• Fixes [UI] In the "Home Videos and Photos" category, alongside movies and series, the top half is cut off. #407
• Related to #

Type of Change

• Bug fix
• New feature
• Refactor
• Performance improvement
• UI/UX update
• Documentation update
• Build/CI change
• Other (describe):

Changes Made

List the key changes included in this PR.

• Added a + 8.0 padding offset to topPad in _LibraryHeader inside library_browse_screen.dart to match _MusicHeader padding behavior.

Platform

• Android
• iOS
• macOS
• Windows
• Linux
• All / Shared code

Testing

• Tested on emulator / simulator
• Tested on physical device
• Manual testing completed
• Not tested (explain why):
  • Code analyzed and verified with flutter analyze (no issues found).
  • Matches padding behavior of _MusicHeader which has been visually verified.
  • I'm tired and haven't had coffee yet

Test Steps

1. Navigate to a library page (Home Movies, Playlists, Movies, etc.) and check title height.
2. Verify alignment with the Audio page title.

Screenshots (if applicable)

Include screenshots or recordings for UI changes.

Checklist

• Code builds successfully
• Code follows project style and conventions
• No unnecessary commented-out code
• No new warnings introduced