bright black in labels

[haliphax]

The BannerApp's Label component has an issue with the intensity SGR code; bright black is not given higher intensity and appears the same as dark black.

This will need some more experimentation to suss out. I don't think it's an issue with the container, but with the host operating system, as this does not happen when running the container on my local machine.

[haliphax]

Using Ubuntu as the host (vs. alpine) made no difference. 🤔

[haliphax]

Replacing the use of intensity for foreground color (e.g. \x1b[1;30m) with the use of aixterm "bright color" variants (e.g. \x1b[90m) renders correctly. No idea what's going on, but I feel like this issue is going to be deep.

https://en.wikipedia.org/wiki/ANSI_escape_code#Colors

[haliphax]

This appears to be a bug in either rich or textual, and not due to my system. I had a previous version installed in my local environment which was leading to the difference in rendering behavior. Now that I have the latest dependencies installed locally, I am able to reproduce the issue reliably.