Fix critical macOS crash and add icon size configuration

[ANAVHEOBA]

This commit addresses three vital issues:

1. Fix issue [Tauri] App crashes when using the js api crabnebula-dev/drag-rs#23 - macOS app crashes when using JS API

   • Fixed incorrect NSPoint extraction from backingAlignedRect (line 70)
   • The method returns NSRect, not NSPoint - now properly extracting .origin
   • Fixed callback type mismatch in drop handler (line 273)
   • Changed from Fn(DragResult) to Fn(DragResult, CursorPosition)

2. Fix issue [bug][v2] Pictures are very large when dragging them crabnebula-dev/drag-rs#41 - Large drag preview images

   • Added optional icon_size field to Options struct
   • Allows users to specify custom icon dimensions (width, height)
   • Implemented on both macOS (using setSize) and Windows (SHDRAGIMAGE)
   • Maintains backward compatibility - None uses original size

Note: These fixes compile successfully but require manual GUI testing on respective platforms to fully verify functionality.

Related issues: crabnebula-dev#23, crabnebula-dev#41

[Cristian-Vogel]

Hi @ANAVHEOBA,

Thanks a lot for this fix! 🐙 We really appreciate the effort, sorry it has taken a while to get back to you.

We keep the upstream drag‑rs repo here: https://github.com/crabnebula-dev/drag-rs, and we’ve got the same bugs filed as crabnebula-dev#23 and crabnebula-dev#41 in our codebase. Your patches look solid and would be good for everyone using the library.

Would you be up for opening a PR against crabnebula-dev/drag-rs with these changes?

If you’d rather we handle the port, that’s fine too—we’ll make sure to credit your work properly.

Either way, huge thanks for tackling these critical issues!

Best,
@Cristian‑Vogel (CrabNebula team)

[ANAVHEOBA]

Yes, I do that and I also wanted you to know that I would be a great addition to your team, always innovating solution and I want to work in a good team, would love to join your team, thank you