Light themes: agent's code text invisible in tool-call previews (only +/- diff lines render)

Version

Claude Code v2.1.138

Affected themes

All light themes (reproduced on Solarized Light; appears to affect every light theme).

Description

On light themes, the agent's code/text inside tool-call previews (e.g. Update / Edit / Write blocks) is not visible — the foreground color appears to match (or nearly match) the background. Only the highlighted +/- diff lines (with red/green backgrounds) render readably; surrounding context lines and headers are blank.

Repro

1. Switch to any light theme (e.g. Solarized Light via /config)
2. Have Claude run an Edit / Write / Update on a file
3. Observe the tool-call preview — context lines around the diff are invisible

Expected

Context lines and non-diff text in tool-call previews should use a foreground color with sufficient contrast against light backgrounds.