[iOS] Unsent message drafts lost when switching sessions

Bug Report — iOS App Text Entry

Summary

The iOS app does not preserve text entry drafts when switching between sessions. This is a significant regression introduced in a recent iOS update.

Steps to Reproduce

Scenario 1 — Unsent draft lost:

1. Open a session and type a message (do not send)
2. Navigate to a different session
3. Return to the original session
4. Result: The typed text is gone

Scenario 2 — Pending sent message lost:

1. Send a message and wait for it to show as pending/in-flight
2. Navigate to a different session before it completes
3. Return to the original session
4. Result: The pending message is gone from the input area

Expected Behavior

• Unsent drafts should persist per-session when navigating away
• Pending messages should remain visible when returning to a session

Impact

High — users lose work mid-thought when multitasking across sessions. This is a core UX regression that makes the app frustrating to use on mobile where switching context is common.

Environment

• Platform: iOS (recent update)
• Client: Claude iOS app

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Submitted via Claude Code on behalf of a user who cannot access /feedback over Remote Control.