Colors styling doesn't work with <s> and <u>

in lexxy editor the element

```


TEST


```

with proper color and background color display

in lexxy-content is turned into the element with tags like `` or ``

```

TEST

and does not apply color or background color in full

Reproduce the formatting in the Lexxy editor and compare the working mark/strong structure with the generated s/i/mark/strong structure shown in the report. Trace how s and u tags are rendered and styled, then verify that both text color and background color remain visible in the resulting content.

Written by the indexing model from the issue text.