Help: show it in the channel when the DM can't be sent, and log where the command came from

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

docs/commands.md

@@ -35,7 +35,7 @@ Anyone can use these. `/rps`, `/rpsstats` and `/rpsleaderboard` work in servers
 
 | Command | What it does |
 | --- | --- |
-| `/help` | DMs you a command reference |
+| `/help` | DMs you a command reference, or shows it to you in the channel if DMs are off |
 
 ## Leveling