feat: deduplikacja wpisów w historii odtwarzania (każde nagranie widoczne tylko raz)

bot.py

@@ -34,7 +34,15 @@ class MusicBot(commands.Cog):
                 import json
                 with open(config_path, "r") as f:
                     data = json.load(f)
-                    self.history[guild_id] = data.get(str(guild_id), [])
+                    raw_history = data.get(str(guild_id), [])
+                    unique_history = []
+                    seen = set()
+                    for item in raw_history:
+                        key = (item.get("title", ""), item.get("url", ""))
+                        if key not in seen:
+                            seen.add(key)
+                            unique_history.append(item)
+                    self.history[guild_id] = unique_history
             except Exception as e:
                 print(f"Error loading history: {e}")
                 self.history[guild_id] = []
@@ -69,6 +77,7 @@ class MusicBot(commands.Cog):
             "is_local": player.data.get("is_local", False),
             "filepath": player.data.get("filepath")
         }
+        history = [h for h in history if h.get("title") != entry["title"] and (not entry.get("url") or h.get("url") != entry["url"])]
         history.insert(0, entry)
         self.history[guild_id] = history[:50]
         self.save_history(guild_id)