Add image_model property to MultiModelManager

codai/models/manager.py

@@ -381,6 +381,11 @@ class MultiModelManager:
         self.tts_model: Optional[str] = None
         self.image_models: List[str] = []
         self.vision_models: List[str] = []
+    
+    @property
+    def image_model(self) -> Optional[str]:
+        """Return the first image model or None."""
+        return self.image_models[0] if self.image_models else None
         self.tool_parser = ModelParserAdapter()
         self.current_model_key: Optional[str] = None
         self.config: Dict[str, Dict] = {}