light-ansi/dark-ansi themes render the header/status bar as white-on-white, unreadable until selected

Environment:

• Claude Code version: 2.1.236
• Terminal: WezTerm 20240203-110809-5046fc22, color scheme rose-pine-moon
• OS: macOS (Darwin 23.6.0)

Steps to reproduce:

1. Set "theme": "light-ansi" (or "dark-ansi") via /theme.
2. Run Claude Code in a WezTerm pane using a non-default dark color scheme (rose-pine-moon).
3. Observe the header/status bar area of the UI.

Actual behavior: The header/status bar renders as white text on a white background, effectively invisible. Selecting that text with the mouse reveals it (the selection highlight paints a colored background over it, and the white text becomes visible against that), confirming the text is there but has no usable background contrast.

Expected behavior: The header should render with readable contrast, consistent with the rest of the UI.

Additional notes:

• The rest of the UI (assistant text, Bash tool commands, tool output) renders correctly under both light-ansi and dark-ansi, only the header/status bar is affected.
• Switching to the plain dark theme (non-ANSI, fixed true-color palette) fully resolves it, everything including the header renders correctly.
• Reproduces identically both inside a Herdr-managed pane and in a plain WezTerm tab with no multiplexer involved, ruling out the terminal multiplexer as the cause.
• Reproduces with both light-ansi and dark-ansi (opposite light/dark polarity), suggesting the bug is in the -ansi rendering path itself rather than in either specific theme's color choices.
• Not yet tested against WezTerm's default/stock color scheme, only reproduced so far under rose-pine-moon, so it's confirmed multiplexer-independent but not yet confirmed terminal-color-scheme-independent.