Bitrix24 ships the quoted message inline on reply events via REPLY_MESSAGE,
but the channel parsed a non-existent REPLY_TO_MESSAGE_ID field, so the agent
never saw what a user was replying to. Recognize replies and feed their
context to the agent (Hybrid design):
- events.go: parse data[PARAMS][REPLY_MESSAGE][ID|AUTHOR_ID|MESSAGE] (form+json)
with PARAMS[REPLY_ID] fallback into EventParams.ReplyMessage; drop the dead
ReplyToMID field + bitrix_reply_to_mid meta.
- reply_context.go (new): resolveReplyContext prepends a short note and, for
media-only originals, re-injects the quoted file(s) through the same download
pipeline as a direct upload.
text quote -> sanitize BBCode + truncate, no API call.
media quote -> im.dialog.messages.get (works for TYPE=bot bots, unlike the
blocked imbot.v2.Chat.Message.get) to recover the attachment, bounded by
media_max_mb; note-only fallback on any fetch/download failure.
- handle.go: wire resolveReplyContext into message assembly (prefix + extra media).
Covers text, image, audio, file, video quotes. Non-reply events are a no-op.
Adds unit tests for parse (form+json), sanitize, file-id extraction, result
parsing, the messages.get fetch, and both resolve branches.
Co-authored-by: DangTinh311 <dangtinh31193@gmail.com>
