The end points of a line are not aligned exactly with the grid points, when the unit is set to "Millimeters"

[mpreissler]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

You must agree to search and the code of conduct. You must fill in this entire template. If you delete part/all or miss parts out your issue will be closed.

Describe the bug
The end points of a line are not aligned exactly with the grid points, when the unit is set to "Millimeters".

To Reproduce
Steps to reproduce the behavior:

1. Open a new blank diagram.
2. Click on "View" menu, goto "Units" submenu and change the value to "Millimeters".
3. Change the grid size to "0.5 mm". (see 1st screenshot)
4. Create a new line
5. Align one of the two line endpoints on the grid.
   Result: The line endpoint is usually positioned next to the grid and not on the grid. (See 2nd screenshot)

Expected behavior
I expect the end point of the line to be aligned with the grid.

Screenshots

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version 24.6.4

Desktop (please complete the following information):

• OS: Windows 10 Version 22H2

Additional context
Add any other context about the problem here.