Previously a message composed while the AI agent was streaming a reply was
silently dropped (the composer early-returned on isStreaming). Now such
messages are queued FIFO and sent automatically once the current turn
finishes cleanly.
- chat-input: submit() enqueues while streaming (via new onQueue prop) and
sends otherwise; during streaming show a queue Send button (when text is
present) alongside the Stop button; the textarea stays usable.
- chat-thread: per-conversation queue in local state (mirrored in a ref);
flush the next message in onFinish ONLY on a clean finish - ai@6 useChat
fires onFinish from a finally on Stop/disconnect/error too, where the queue
must be preserved. Pending messages render as removable chips above the
composer. Queue is cleared on chat switch (parent remount) and survives
in-place new-chat id adoption.
- queue-helpers: pure FIFO helpers (enqueue/dequeue/removeQueuedById) + tests.
- i18n: add en-US/ru-RU keys (Queue message, Remove queued message,
Send when the agent finishes).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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