[BUG] Agent view ignores 'theme' setting; uses defaults instead of user's configured theme

Summary

The new agent view (claude agents, shipped 2026-05-11 in 2.1.139) does not honor the theme key from ~/.claude/settings.json. Regular interactive claude sessions use the configured theme correctly; agent view falls back to default colors regardless.

Steps to reproduce

1. Configure a non-default theme in ~/.claude/settings.json, e.g.:

``json
{ "theme": "custom:eink-kaleido" }
`
(Any custom theme registered in ~/.claude/themes/` reproduces; built-in non-default themes should as well.)

1. Run claude interactively — the configured theme is applied as expected.
2. Run claude agents — the dashboard appears with default styling, not the configured theme.

Expected

Agent view inherits the same theme setting as the main interactive session, including custom themes registered under ~/.claude/themes/.

Actual

Agent view uses default colors. No theme inheritance, no agentView.theme setting documented, no warning/error.

Why this matters (not just cosmetic)

I run Claude Code on a Kaleido 3 e-ink display where the contrast/saturation of UI colors is functional, not decorative — default themes are unreadable on this hardware. My custom theme (custom:eink-kaleido) is tuned for Kaleido 3's color filter array, and not having it in agent view makes the dashboard practically unusable for me. There are presumably also accessibility cases (low-vision users with tuned high-contrast themes) where this matters similarly.

Suggested fix

Have agent view read the same theme resolution path as the main session, including custom themes under ~/.claude/themes/. Alternatively (or additionally), accept an agentView.theme override for users who want the dashboard styled differently from their session.

Environment

• Claude Code: 2.1.139
• OS: Windows 11 Pro (10.0.26200)
• Shell: Git Bash / MINGW64 (launched as winpty claude agents due to TTY-detection — orthogonal issue)
• Display: Dasung Paperlike Color (Kaleido 3 panel)
• Settings file location: E:/Projects/.claude/settings.json (via CLAUDE_CONFIG_DIR)