VS Code: switching sessions via history discards unsaved input without warning

When using the session history button in the VS Code sidebar to switch to a different session, any text typed in the input box is silently discarded. No confirmation dialog or warning is shown.

Steps to reproduce

1. Open Claude Code panel in VS Code
2. Type text in the input box (do not send)
3. Click the session history button and select a different session
4. Text in the input box is gone — no warning, no way to recover

Expected behavior

Either:

• A confirmation dialog ("You have unsaved text in the input box. Switch anyway?")
• Or the draft text is preserved/restored when switching back to the original session

Environment

• Claude Code VS Code extension
• Linux (Debian)
• VS Code latest