[BUG] Fullscreen mode: static grey/olive highlight bar behind user messages only (cosmic-term / COSMIC DE)
Environment
- Terminal: cosmic-term (COSMIC desktop, Pop!_OS)
- Rendering mode: fullscreen (settings.json "tui": "fullscreen")
- Theme: dark-ansi
- TERM=xterm-256color, COLORTERM=truecolor
Describe the bug
A horizontal highlight bar spans the full terminal width behind my own
messages (user turns) only -- never behind Claude's responses. It's a
muted grey/olive color that clashes with the rest of the dark-ansi
theme and is low-contrast/hard to read. It is NOT related to mouse
hover (confirmed: it's present regardless of cursor position, and
persists across scrollback).
Switching theme presets via /config does not change or remove it,
suggesting it's a fixed element of fullscreen rendering rather than
something theme presets control.
To Reproduce
- Run Claude Code with "tui": "fullscreen" and "theme": "dark-ansi"
in settings.json, inside cosmic-term on COSMIC DE
- Send any message
- Observe the highlight bar behind the sent message
Screenshot
<img width="1254" height="568" alt="Image" src="https://github.com/user-attachments/assets/242ac0f8-a8ee-4452-ab4d-378d36a6987a" />
Expected behavior
User messages should render with the same background as the rest of
the transcript, or at minimum a color that's part of the selected
theme rather than a fixed grey/olive that doesn't match.