Coping whole table cell is not possible

[piotrbaldych-cr]

Describe the bug
When highlighting whole cell in a table block and pressing CTRL+C error is logged in console, the content of the cell is not copied

TypeError: Cannot read properties of undefined (reading 'children')

To Reproduce

1. Go to https://www.blocknotejs.org/examples/basic/minimal
2. Add table block
3. Triple click inside of a cell in the table block to highlight it
4. Press CTRL+C

Expected behavior:
Content of the cell or cell is copied to clipboard and can be pasted elsewhere

Actual behavior:
Content is not copied
Error is logged in console

Misc

• Node version: n/a
• Package manager: n/a
• Browser: Chrome 128
• I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[izr8809]

I'm waiting too