scroll_settings_panel only read MouseWheel, which is generated by desktop
scroll wheels and two-finger OS-level scroll gestures. On Android, a
single-finger swipe generates TouchInput, not MouseWheel, leaving the
settings panel unscrollable on real touchscreen devices.
Added touch_scroll_settings_panel: tracks touch start Y, applies the
vertical delta from each Moved event to ScrollPosition, resets on lift.
Registered TouchInput messages in SettingsPlugin::build so tests that use
MinimalPlugins (which omit InputPlugin) don't fail with "Message not
initialized".
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300
d06af28aef