Add join/part command to the bot

bot.py

@@ -134,7 +134,8 @@ class Bot:
 
             await commands.handle_pm(
                 network, nick, prefix, text,
-                self._database, pm_reply, self.reload)
+                self._database, pm_reply, self.reload,
+                self.join_channel, self.part_channel)
         elif target.startswith("#"):
             # Channel message
             async def ch_reply(msg):
@@ -142,13 +143,39 @@ class Bot:
 
             await commands.handle_channel(
                 network, target, nick, prefix, text,
-                self._database, ch_reply, self.reload)
+                self._database, ch_reply, self.reload,
+                self.join_channel, self.part_channel)
 
     async def _on_connected(self, network: str):
         log.info("[%s] Connected and registered", network)
 
     # ── Hot reload ────────────────────────────────────────────────────────────
 
+    async def join_channel(self, network: str, channel: str) -> str:
+        """Join a channel on a network. Called from IRC commands."""
+        client = self._clients.get(network)
+        if not client:
+            nets = ", ".join(self._clients) or "none"
+            return f"Unknown network '{network}'. Connected networks: {nets}"
+        if client.in_channel(channel):
+            return f"Already in {channel} on {network}."
+        client.join(channel)
+        log.info("Joining %s on %s (via command)", channel, network)
+        return f"Joining {channel} on {network}."
+
+    async def part_channel(self, network: str, channel: str) -> str:
+        """Part a channel on a network. Called from IRC commands."""
+        client = self._clients.get(network)
+        if not client:
+            nets = ", ".join(self._clients) or "none"
+            return f"Unknown network '{network}'. Connected networks: {nets}"
+        if not client.in_channel(channel):
+            return f"Not in {channel} on {network}."
+        client.send(f"PART {channel} :Leaving")
+        db.purge_channel(self._database, network, channel)
+        log.info("Parting %s on %s (via command)", channel, network)
+        return f"Left {channel} on {network}."
+
     async def reload(self) -> str:
         """
         Re-read the config file and reconcile network connections: