Broken markdownlint config references missing file

The .markdownlint-cli2.yaml at root has a glob that points to docs/tui-chat-composer.md. Problem is, that file doesnt exist anymore. I checked the API tree and the raw URL just gives a 404.

So markdownlint is currently checking a file that isnt there. Any real markdown files breaking the MD013 rule (line_length: 100) wont get caught because the glob matches nothing.

Looked through docs/ and none of the existing files look like a renamed version of the missing one. Its probably just a leftover from a doc that was moved or deleted.

Couple of ways to fix it:

1. Change the glob to something that actually matches existing files, like "docs/*.md"
2. Drop the globs section entirely if you dont need to scope linting to specific files