Channel card

Get one channel's core profile (name, telegramChatId, url — the public t.me link, null for a private channel; postLinkBase — append "/<Telegram message id>" to link one of the channel's posts, e.g. a tgMsgId from get_channel_insights or a history sourceId from search_channel_content; language, description, header — the text prepended above every published post, see set_channel_header; footer — the text appended under every published post, see set_channel_footer) by channelId, plus its autopilot approval policy (autopilotPolicy + autopilotPolicyConfig, see set_autopilot_policy) and its premium emoji (customEmoji: the connected emoji sets with each emoji's id and base emoji, and autoReplace — when true, plain emoji in posts are published as the premium emoji with the same base emoji). To place a specific premium emoji in a post, write <tg-emoji id="ID">base emoji</tg-emoji> with an id from these sets.