The WeCom adapter delivers each response as a single complete message
via aibot_respond_msg / aibot_send_msg — it does not stream tokens
incrementally (no edit_message override) and send_typing is a no-op.
Reword the 'Reply-mode streaming' feature bullet to 'Reply correlation',
retitle the section to 'Reply-Mode Responses', and add a note clarifying
that neither token streaming nor typing indicators are supported.
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