Plan mode: 'Clear context and execute' option no longer surfaces in approval dialog

Description

After entering plan mode via Shift+Tab and having Claude present a plan, the approval dialog does not include an option to clear the planning context before executing. This option was previously available (or is documented as available) but does not appear in the current UI.

Environment

• Claude Code version: latest
• Platform: Windows 11
• Interface: CLI (terminal)

Steps to Reproduce

1. Press Shift+Tab to enter plan mode
2. Type a prompt and let Claude explore/plan
3. Review the plan approval dialog

Expected Behavior

Each approval option should offer a "clear planning context first" step before execution begins — keeping the execution context clean by discarding the exploration phase.

Actual Behavior

The approval dialog presents execution options but no "clear context" variant is shown.

Notes

This may have been quietly removed, gated behind a flag, or only available on specific platforms/versions. The docs reference this behavior but it doesn't match what's seen in the live product.