refactor: przeniesienie konfiguracji kanału logów do dedykowanego modalu Ustawienia z wybierakiem per-serwer

bot.py

@@ -124,7 +124,7 @@ class MusicBot(commands.Cog):
                 print(f"Error loading config: {e}")
         return None
 
-    def save_channel_id(self, guild_id: int, channel_id: int):
+    def save_channel_id(self, guild_id: int, channel_id: Optional[int]):
         config_path = "config/config.json"
         try:
             import json
@@ -133,7 +133,11 @@ class MusicBot(commands.Cog):
             if os.path.exists(config_path):
                 with open(config_path, "r") as f:
                     data = json.load(f)
-            data[str(guild_id)] = channel_id
+            if channel_id is None:
+                if str(guild_id) in data:
+                    del data[str(guild_id)]
+            else:
+                data[str(guild_id)] = channel_id
             with open(config_path, "w") as f:
                 json.dump(data, f, indent=4)
         except Exception as e: