Fix single character empty cells not being updatable

[SanjulaGanepola]

Fixes #463

The original fix in 14b0c6b, did not properly handle updating of single character empty cells. This new fix removes browser-inserted <br> tags due to empty contenteditable divs.

Before
The update statement previously used to have a random line break:

After running the update a second time, you were able to edit it, but the preview of the update statement was not correct:

After
No more line breaks:

Can properly update a single character empty cell on the first try:

[github-actions]

👋 A new build is available for this PR based on 2e05fe9.

• Download here.
• Read more about how to test

[forstie]

This works better for sure, but while validating, I hit a similar issue.
Can you please take a look?

COMMON1
update: select * from coolstuff.singletons;

It doesn't allow me to update the highlighted cells.

[forstie]

This is improved for sure.
That said, I posted an issue that I'm seeing in the comments.
Please take a look.
Thanks

[SanjulaGanepola]

@forstie I merged into this branch the changes on the main branch which will pull in what was added in #409. I gave the scenario you mentioned a try and it works now. Can you try the updated VSIX?

Screenshare.-.2026-01-15.10_44_17.AM.1.mp4

[forstie]

Works great!
Ship it