fix(slack): enrich link previews with unfurl metadata from attachments#395
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visyat
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Bundles 5 small upstream bug fixes into one PR. Each is independent and covered by a regression test. - vercel/chat#394 (slack): preserve email addresses in @mention regex. ``user@domain.com`` no longer extracts ``@domain`` as a mention. - vercel/chat#292 (slack): guard Slack API calls against empty ``thread_ts`` to fix ``invalid_thread_ts`` errors. - vercel/chat#256 (discord): remove duplicate text when posting card messages. ``content`` is omitted on the create path and explicitly cleared on the edit path (Discord PATCH preserves omitted fields). - vercel/chat#395 (slack): enrich link previews with unfurl metadata from attachments. Routes ``message_changed`` events through a new ``_handle_message_changed`` so the message handler sees unfurled links instead of bare URLs. New cache + poll window. - vercel/chat#407 (telegram): rewrite format converter to emit MarkdownV2 (``*bold*`` etc.) instead of legacy ``Markdown``. Adds proper escaping for the 18 special characters MarkdownV2 reserves in normal text, the narrower set inside code blocks, and the parens/backslash escape inside link URLs. https://claude.ai/code/session_01FyMxQn2BEAzmwKS1GZczKj
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attachmentsfield toSlackEventinterface for legacy unfurl dataLinkPreviewobjects with title, description, imageUrl, and siteName from Slack's attachment metadatamessage_changedevents for unfurl updates instead of blanket-ignoring themconversations.replies/conversations.historynow include full OG metadata fortoAiMessages