[SuperEditor][SuperReader][SuperTextField] - Initial magnifier location is wrong on initial press

[matthew-carroll]

The magnifier appears in the wrong place, initially.

I found this problem on iOS. It probably happens on Android, but I'm not sure. I found the problem in Super Editor, but I assume it's happening in Super Reader and Super Text Field, too.

Repro steps:

• Types some text on line 1
• Insert a newline down to line 2, ensure the caret is sitting at the start of line 2
• Long-press on a word in line 1

Expected result: Magnifier appears where finger is pressed

Actual result: Magnifier appears where the caret sits.

https://github.com/user-attachments/assets/b81ac348-57ee-44af-a761-e9e6f4da2742