Link hover/click regions are calculated incorrectly on double-width lines

### Windows Terminal version

1.25.622.0

### Windows build number

10.0.19045.5371

### Other Software

_No response_

### Steps to reproduce

Execute the following command in a WSL bash shell:
```sh
echo -e "\e#6This is a \e]8;;http://example.org\e\\link\e]8;;\e\\ test"
```
Then hover the mouse cursor of the word `link`.

### Expected Behavior

The dotted underline of the link should change to a solid underline, and a tooltip should appear showing the link destination.

### Actual Behavior

Nothing happens when you hover over `link`. You instead need to hover over the word `is` in order for the link to be detected. It seems that the link region calculation in not taking line attributes into account.

Reproduce the issue in Windows Terminal 1.25.622.0 using the provided WSL bash command, then inspect the link hover and click-region calculation where line attributes are handled. Done means hovering directly over “link” changes its underline and shows the http://example.org destination tooltip.

Written by the indexing model from the issue text.