modify conversation lyrics extraction for compatibility

app.py

@@ -862,13 +862,20 @@ def response_audio(state: AppState, audio: tuple, genre_value, mood_value, theme
 
 def extract_lyrics_from_conversation(conversation):
     """
-    Extract lyrics from conversation history.
+    Extract lyrics from conversation history with cross-platform compatibility.
     """
     lyrics = ""
     for message in reversed(conversation):
-        if message["role"] == "assistant" and "verse" in message["content"].lower() and "chorus" in message["content"].lower():
-            lyrics = message["content"]
-            break
+        if message["role"] == "assistant":
+            content_lower = message["content"].lower()
+            # 先尝试严格匹配（保持原逻辑）
+            if "verse" in content_lower and "chorus" in content_lower:
+                lyrics = message["content"]
+                break
+            # 如果没找到，再用宽泛匹配（兼容性备选）
+            elif any(marker in content_lower for marker in ["[verse", "[chorus", "**verse", "**chorus"]):
+                lyrics = message["content"]
+                break
     return lyrics
 
 def generate_chat_completion(client, history, genre, mood, theme):