[BUG] /output-style menu checkmark doesn't update to reflect selected style

Bug Description

When using /output-style to change the output style, the checkmark (✔) indicator in the menu remains on "Default" instead of moving to the newly selected style.

Steps to Reproduce

1. Run /output-style
2. Select "Socratic Learning" (or any non-default style)
3. Confirm message says "Set output style to Socratic Learning"
4. Run /output-style again
5. Observe that the checkmark (✔) is still next to "Default" instead of "Socratic Learning"

Expected Behavior

The checkmark should appear next to the currently active output style.

Actual Behavior

The checkmark remains on "Default" regardless of which style is selected.

Environment

• Claude Code version: 2.0.76
• OS: macOS (Darwin 25.0.0)

Notes

The style is being applied correctly (Claude's responses change according to the selected style), it's only the visual indicator that doesn't update.