[Feature Request] Bad readability in dark mode: Add semantic color customization for terminal output via natural language prompts

Bug Description
TLDR: Semantic theming. --> In dark mode, filenames are dark blue, making them hard to read. Also the new recap (love it!) is "bright black" and cursive, while I would like it to stand out in white or yellow. It's currently not possible to say "make recaps bright white" or "show filenames in green". Claude Code tells me I can tweak the ANSI mappings in the editor, but that would have impact beyond Claude Code and is tedious. I would love to be able to prompt Claude Code to improve the color or theme by using natural language. This could also work great for tables etc. I don't want a disco but I also don't want a screen with 95% grey-letters-on-black.

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.116
• Feedback ID: 66ae1c9c-3e9d-4d0a-b13c-ecd5ee1bc8af

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for .local/share/claude/versions/2.1.116 (expected in multi-process scenarios)\n    at jl_ (/$bunfs/root/src/entrypoints/cli.js:2752:2177)\n    at B88 (/$bunfs/root/src/entrypoints/cli.js:2752:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-21T12:00:59.666Z"}]

To show the issue that triggered this request, here is a screenshot of Claude Code in the default terminal colors in dark mode:

<img width="288" height="164" alt="Image" src="https://github.com/user-attachments/assets/c8d245e2-6e6c-42ad-8351-8f33716339e6" />