fix: dismiss keyboard on tap in search page (iOS)

[tnswo561412]

Summary

Fix the issue where iPhone users cannot dismiss the keyboard after searching.

Problem

• iPad has a dismiss button at the bottom of the keyboard, but iPhone does not
• Users had to tap the three dots (⋯) menu on a song to dismiss the keyboard

Solution

• Wrap search results area with GestureDetector
• Use HitTestBehavior.translucent to detect taps on empty space
• Call FocusScope.of(context).unfocus() on tap to dismiss keyboard

Changes

• lib/pages/search/search.dart: Wrap search results area with GestureDetector to dismiss keyboard on tap

Test plan

• [ ] Open search page on iPhone
• [ ] Type search query
• [ ] Tap on search results area or empty space
• [ ] Verify keyboard dismisses
• [ ] Verify tapping search result items still works correctly

[tnswo561412]

Hello, just checking in on this PR. I understand you might be busy, but I’d appreciate it if you could take a look when you have a moment. I'm happy to resolve any conflicts or make changes if needed.

[tnswo561412]

I understand you must be busy, but I would highly appreciate it if you could spare some time to review this PR. As a part of a university course assignment, feedback or a merge is crucial for my submission deadline.

Please let me know if there are any issues I need to resolve, or if you have specific feedback on the code. Thank you for your time!