Historical chat shows blank UI after context compaction, but Claude can still access the summary

Description

When opening a historical conversation that has been context-compacted, the chat UI shows a blank screen (just the Claude Code logo and \"You've come to the absolutely right place!\"). No messages — not even the compaction summary — are displayed.

However, Claude itself can still access the compacted summary and respond with context from the earlier conversation, so the data is present but not rendering.

Steps to Reproduce

1. Have a long conversation that triggers context compaction
2. Close the conversation
3. Reopen it from history

Expected Behaviour

The compaction summary (and any subsequent messages) should be visible in the UI.

Actual Behaviour

The chat window is completely blank. Claude can still reference the earlier context, confirming the summary exists on the backend.

Screenshot

<img width="1147" height="612" alt="Image" src="https://github.com/user-attachments/assets/20f29ec8-8e77-4f04-9e0b-10b8bf22e4a3" />

_(See attached: chat title visible in top bar as \"Hi claude, there's an interesting discrep...\" but body is empty)_

Environment

• Claude Code VSCode extension
• macOS Darwin 24.5.0