Claude iOS app crashes immediately when opening a Remote Control session (iOS 26.5)

What happens: Tapping into a Remote Control session from the Code tab in the Claude iOS app crashes the app instantly (immediate close to the home screen, no error message). The session list renders fine — the crash happens only when opening a session.

Environment:

• Claude iOS app: latest (auto-updated 2026-06-23)
• iOS: 26.5
• Account: Pro (claude.ai OAuth)
• Server: Claude Code v2.1.186 running claude remote-control --name truenas-admin --spawn session in a Linux container (Debian 12, Node 24), --spawn=session (single-session) mode

Repro:

1. Start claude remote-control --spawn session on a machine, logged in via claude.ai (Pro).
2. On iOS, open the Claude app → Code tab → tap the online session.
3. App crashes immediately.

Ruled out (not the cause):

• Full app delete + reinstall → still crashes.
• Brand-new empty session (no history/content) → still crashes, so it is not session content.

Works fine: Opening the same session in mobile Safari at https://claude.ai/code renders and responds normally — so the server/session is healthy; the crash is client-side in the native app.

Expected: The app opens the session like the web client does.