Desktop (macOS): reopening an existing conversation shows a blank transcript (history not rendered), though context is retained

Describe the bug
After closing and reopening the Claude Code desktop app (for example, the next day), opening the same existing conversation displays a completely blank message panel — none of the previous messages are rendered. The transcript looks empty/lost in the UI.

However, there is no actual data loss: when I ask Claude within that same conversation, it still remembers the full prior discussion correctly. So the history clearly still exists on the backend, it is just not displayed after reopening.

Steps to reproduce

1. Have a normal conversation in the Claude Code desktop app (macOS).
2. Close the app / leave it until the next day.
3. Reopen the app and open the same conversation.
4. The conversation panel is blank — no message history is rendered.
5. Ask a question in that conversation; Claude still recalls the earlier context, confirming the data is present but not shown.

Expected behavior
Reopening the conversation shows its full previous message history.

Actual behavior
The reopened conversation shows a blank/empty transcript; the message history is not rendered, even though the context is clearly retained (Claude still remembers it).

Environment

• Claude Code desktop app
• OS: macOS (Darwin 25.5.0)
• Model: Opus 4.8
• App version: (please fill in — Settings/About)

Additional context
This appears to be a transcript loading/rendering issue on reopening a conversation, not data loss. Restarting the app / reopening does not restore the visible history.