Mensagens internas

📄️List a channel's messages

Thirty at a time, oldest first within the page.

**Posting joins the channel.** A user who is not a member becomes one by

Only the text changes, and `edited_at` is stamped so the interface can mark it

**Soft delete.** The row stays as a tombstone, flagged `deleted`, so a thread

**Toggles.** Sending an emoji you already reacted with removes it; a different