Codex composer background missing inside Herdr on WSL2 / Windows Terminal

Is this a reproducible bug?

• I confirm this is a reproducible bug, not a feature request, idea, question, contribution proposal, or direction check.
• I reproduced this bug on the version and environment reported below using the exact steps provided.

Current behavior

Codex’s input area has the same background as the surrounding terminal inside Herdr. Outside Herdr, in the same Windows Terminal/WSL environment, it has the expected grey background.

This also happens in fresh panes and persists after restarting the Herdr server. Explicit RGB background colours render correctly inside Herdr.

Similar reports: #210 (closed), #3679 (direct attach on macOS), and #3012 (native Windows). My reproduction is in WSL2, without direct agent attach.

Expected behavior

The Codex input area should have the same distinguishable background inside Herdr as it does outside Herdr.

Reproduction

1. Open an Ubuntu WSL2 shell in Windows Terminal.
2. Run codex and observe its grey input background.
3. Exit Codex and start herdr.
4. Open a fresh shell pane and run codex.
5. Observe that the input background is no longer distinguishable.

Impact

The input area blends into the conversation, making it harder to see where I am typing.

Environment

• Herdr version: v0.9.0
• Update channel (stable or preview): stable
• Operating system: Windows host, Ubuntu 24.04.4 LTS under WSL2
• Terminal: Windows Terminal
• Shell: Bash
• Codex CLI: 0.154.0
• Herdr theme: catppuccin, auto_switch = false
• Pane environment: TERM=xterm-256color, COLORTERM=truecolor