fix(ui): delay row snapping on home screen during mouse wheel scroll

[mattsigal]

Pull Request

Summary

This PR delays the snap-to-centered-row logic on the Home screen when a mouse wheel scroll is detected, preventing users from getting snapped/pulled back to the currently focused row while trying to scroll through rows using a mouse.

Related Issues

Link related issues or tickets separated by commas.

• Closes #
• Fixes #
• Related to feat: Bringing Full Screen ("TV Mode") to Desktop/webUI #531

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 PointerScrollEvent listener to the Listener widget enclosing the Home screen row list.
• Recorded the timestamp of the last mouse wheel scroll event.
• Extended the _scrollIdleTimer delay to 1000ms (up from 250ms) if a mouse scroll was recently active, ensuring the centering logic only triggers when mouse wheel input has fully stopped.

Platform

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

Testing

Describe how this change was tested.

• Tested on emulator / simulator
• Tested on physical device
• Manual testing completed - tested with Windows Desktop build
• Not tested (explain why):

Test Steps

1. Open TV mode Home Screen on Windows.
2. Use the mouse wheel to scroll vertically.
3. Confirm that the viewport scrolls freely and does not snap back to a row until 1 second after mouse wheel input stops.

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