Bug: /help menu shows stale model name (hardcoded, doesn't reflect actual model)

Summary

The /help menu displays a hardcoded model description (e.g., "currently Sonnet 4.6") that does not update when the user switches models via /model. The actual model is correct — only the /help display text is stale.

Steps to reproduce

1. Start Claude Code (defaults to Opus 4.6)
2. Run /model → confirms "Opus 4.6 (1M context)"
3. Run /help → shows /model description as "currently Sonnet 4.6"

Expected behavior

/help should show the actual active model name, matching what /model reports.

Actual behavior

/help shows a static string that doesn't reflect the runtime model selection. This is confusing — users may think their model switch didn't take effect.

Environment

• Claude Code v2.1.100
• macOS (darwin)