fix: removing all characters from a line logic on iOS

[szydlovsky]

Summary

Fixes: #287.
One of previous PRs has introduced a regression in the logic behind removing all the characters from a line.
When it happens, iOS applies attributes from the previous line.
It's especially bad when paragraph styles are in the line before and a bullet point suddenly appears.

The original fix was to manually remove the characters, remove typing attributes and for the paragraph styles reapply the style that was there in the current line.
Some PR must have removed the typing attributes/style reapplying part when working with that code so I'm returning it to the properly working state.

Test Plan

Scenario 1:
Write one line with some paragraph style.
Then another line with no styling and remove all the characters from the second line.
The paragraph style from the first line shouldn't expand to the second line.

Scenario 2:
Write one line with some paragraph style.
Then another line with a different paragraph style and remove all the characters from the second line.
The style should still be there but with an empty line and the style from first paragraph shouldn't take over the second line's styling.

Screenshots / Videos

Before

Screen.Recording.2025-11-27.at.19.17.05.mov

After

Screen.Recording.2025-11-27.at.19.58.31.mov

Compatibility

OS	Implemented
iOS	✅
Android	❌

[kacperzolkiewski]

Nice catch 🚀