Desktop app (Windows/Mac): no theme toggle — CLI has `/theme`, desktop users are locked to default

Feature request

The Claude Code CLI supports a /theme slash command to switch between light, dark, and other themes. The desktop app (Windows & Mac) has no equivalent:

• No theme selector in Settings
• No /theme slash command in the input
• No menu option

Desktop users are locked to whatever theme ships by default, with no in-app way to change it.

Why this matters now

See #48158 — the current dark theme on claude.ai/code has real readability issues (saturated blue bubbles on near-black background), and desktop-app users have no workaround available from within the app. They can't opt into the previous theme, a light theme, or anything else.

Even if #48158 is resolved by reverting the dark theme, the underlying gap persists: any future theme change affects desktop users with zero escape hatch. This is a parity gap with the CLI and, for users with visual-accessibility needs, a hard block.

Ask

Parity with the CLI:

• Ship a theme selector in the desktop app's Settings, or
• Wire up the /theme slash command inside the desktop app's input

Either one would give desktop users a way out when a theme change doesn't work for them.