fix comfy dep error

nodes/base_vibevoice.py

@@ -863,9 +863,12 @@ class BaseVibeVoiceNode:
                 
         except Exception as e:
             # Re-raise interruption exceptions without wrapping
-            import comfy.model_management as mm
-            if isinstance(e, mm.InterruptProcessingException):
-                raise  # Let the interruption propagate
+            try:
+                import comfy.model_management as mm
+                if isinstance(e, mm.InterruptProcessingException):
+                    raise  # Let the interruption propagate
+            except ImportError:
+                pass
             
             # For real errors, log and re-raise with context
             logger.error(f"VibeVoice generation failed: {e}")