[drasticactions]

I finally got so annoyed with this that I took the time to try to fix it.

When you resize a window on macOS, you sometimes see the traffic-light icons highlight, and the drop-down menu for window positioning appear. This is because we had set up an NSTrackingArea on every setFrameSize, which caused stale locations to be set for the window's mouse position. That would happen to be located in the top-left corner, which would make macOS think the buttons were being highlighted. Instead of recreating it, we can use NSTrackingInVisibleRect once. AppKit follows that; we get the same events, and it doesn't break the mouse positioning.

For tracking enter and exit, we can use the real cursor events with mouseLocationOutsideOfEventStream. and NSEventTypeMouseMoved.

** Copilot stuff below **

This pull request addresses issues with mouse tracking and event handling in the AvnView implementation for macOS. The changes ensure more reliable pointer tracking during and after view resizes, and prevent stale or synthetic mouse events from corrupting the pointer state. The most important changes are grouped below by theme.

Mouse Tracking Improvements:

• The tracking area _area is now created with the NSTrackingInVisibleRect option during initialization, so it automatically follows the visible bounds of the view and does not need to be recreated on every resize. This prevents AppKit from queuing synthetic enter/exit events with stale locations during live-resize, which previously corrupted pointer positions. (AvnView.mm, native/Avalonia.Native/src/OSX/AvnView.mmL81-R91)
• The logic to remove and recreate the tracking area in the setFrameSize: method was removed, since the tracking area now automatically adjusts with the view. (AvnView.mm, native/Avalonia.Native/src/OSX/AvnView.mmL129-L147)

Mouse Event Handling Fixes:

• For synthetic mouse enter/exit events, the current pointer location is now obtained using mouseLocationOutsideOfEventStream instead of using the stale event location. This ensures accurate pointer position reporting. (AvnView.mm, native/Avalonia.Native/src/OSX/AvnView.mmL259-R260)
• Only real mouseMoved events are forwarded up the responder chain; synthetic enter/exit events are not, preventing the window frame from tracking the mouse at incorrect positions. (AvnView.mm, native/Avalonia.Native/src/OSX/AvnView.mmR394-R397)
• In mouseEntered:, the code now checks if the pointer is actually inside the view before processing the event, ignoring false enter events. (AvnView.mm, native/Avalonia.Native/src/OSX/AvnView.mmR566-R568)

[avaloniaui-bot]

You can test this PR using the following package version. 12.2.999-cibuild0068388-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 12.2.999-cibuild0068402-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 12.2.999-cibuild0068637-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[MrJul]

Tested, works as expected: no more annoying random popup menu.
LGTM!