can only concatenate str (not "dict") to st

[candiceche]

Expected behavior
The lida.visualize() method should accept a valid, instantiated Summary object and Goal object and proceed to generate the visualization code without raising a TypeError.

Actual behavior
The method fails with the error TypeError: can only concatenate str (not "dict") to str. The traceback points to an issue deep within the library's prompt construction logic when handling the summary object.

Additional context
This issue makes it very difficult to use the lower-level summarize -> visualize workflow. The error suggests that the visualize method may have an undocumented dependency on internal state or context that is only created when using the library's higher-level methods.

Thank you for your work on this promising library! I hope this report is helpful for tracking down the issue.