fix: enhance OpenAI client for OpenRouter compatibility while maintaining configuration

src/openai_client.py

@@ -6,18 +6,30 @@ class OpenAIClient:
     def __init__(self):
         self.config = configparser.ConfigParser()
         self.config.read('config/config.ini')
+        
+        # Configure OpenAI client with OpenRouter-specific headers
         self.client = OpenAI(
             api_key=self.config['openai']['api_key'],
-            base_url=self.config['openai']['base_url']
+            base_url=self.config['openai']['base_url'],
+            default_headers={
+                "HTTP-Referer": "https://streamlit-chat-app.com",  # Required by OpenRouter
+                "X-Title": "Streamlit Chat App"  # Optional, helps with analytics
+            }
         )
     
     def get_chat_response(self, messages):
         try:
+            # Ensure messages are correctly formatted
+            formatted_messages = [{"role": msg["role"], "content": msg["content"]} for msg in messages]
+            
+            # Make API request
             response = self.client.chat.completions.create(
                 model=self.config['openai']['model'],
-                messages=messages,
+                messages=formatted_messages,
                 stream=True
             )
             return response
         except Exception as e:
+            # Enhanced error logging
+            print(f"Error details: {e}")
             raise Exception(f"OpenAI API error: {str(e)}")