Clearer conversation status and more reliable sign-in and settings recovery

We are refining how ChatTalk AI shows message confirmations from people and AI. Clearer delivery and confirmation statuses should make it easier to follow a conversation's progress.

We are also checking whether you stay signed in when you reopen the app, and how settings load and recover. We are working to prevent existing settings from changing unexpectedly during recovery.

These improvements are in development and testing. We will confirm their behavior in real usage before announcing what will be included and when it will be available.