[BUG] Rejected plans disappearing from chat

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.45 (Claude Code)
• Operating System: macOS 15.5
• Terminal: Ghostty

Bug Description

In Claude Code's "plan" mode, when the user rejects the proposed plan, the plan disappears from the chat window.
This makes it difficult to suggest changes to the plan unless you copy it over to a text editor before rejecting.

Steps to Reproduce

1. Shift+Tab twice to go to "plan" mode.
2. Ask for a plan to implement something.
3. Reject the plan.

Expected Behavior

The rejected plan stays in the chat. (I think it used to show up as greyed out text.)

Actual Behavior

The rejected plan disappears.

Additional Context

N/A