Add setting to hide/merge the 'auto mode on' status bar indicator

Problem

When permissions.defaultMode is set to "auto" and a custom statusLine command is configured, Claude Code displays two lines at the bottom of the terminal:

1. The custom status line output
2. A hardcoded auto mode on indicator

There is no way to hide, suppress, or merge this built-in indicator into the custom status line. This wastes vertical space and looks redundant when the custom status line already surfaces the permission mode.

Proposed solution

Add a setting (e.g. hideAutoModeIndicator: true or compactStatusBar: true) that either:

• Hides the built-in auto mode on line entirely (letting the user surface it in their custom statusLine if desired), or
• Merges it inline into the custom status line output

Environment

• Claude Code CLI on Linux
• statusLine configured with a custom command
• permissions.defaultMode: "auto"