Mobile chat occasionally froze with the input disabled and nothing
progressing — the underlying cause is SSE sockets dropping silently on
mobile network handoffs / proxy idle timeouts. Dio never observes the
close, so the send loop's `await for` hangs indefinitely with
isStreaming=true.
Three changes:
- Wrap the SSE stream in a StreamIterator with a 45s per-event timeout
as a stall watchdog. On timeout, break out and let the polling pass
reconcile state from the server.
- Add pull-to-refresh on the chat message list and an AppBar refresh
button with inline spinner feedback. Works on both empty and
populated states.
- MessagesNotifier.refresh() now also clears isStreaming /
streamingStatus when the server reports the latest assistant message
as complete — so a stuck UI unfreezes the moment the user pulls down
or taps refresh, even if the original SSE loop is still hanging.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
bvandeusen
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