When the agent's response is delivered via in-place card update (Feishu
streaming preview), the user gets no push notification. This adds a
configurable done_emoji option (e.g. "Done") that adds a reaction after
the "OnIt" reaction is removed, so the user knows the agent finished.
Only activates in quiet mode when the preview card was updated in-place
at least once (via UpdateMessage). Non-quiet mode is unaffected as
intermediate messages already trigger push notifications. Single-round
responses that only use SendPreviewStart are also unaffected, as the
initial send already triggers a push notification.
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
