Shiny express changes behavior of inspecting callable objects

[cpsievert]

Here is a minimal Shiny core app where the __name__ of a parameter annotation via inspect.signature() is what one would expect (int in this case):

import inspect
from shiny import App, ui

def foo(x: int):
    return x + 1

x = inspect.signature(foo).parameters["x"]
res = x.annotation.__name__

app_ui = ui.page_fixed(res)

app = App(ui=app_ui, server=None)

However, doing the same with Shiny express results in an error:

import inspect
import shiny.express

def foo(x: int):
    return x + 1

x = inspect.signature(foo).parameters["x"]
x.annotation.__name__

RuntimeError: 'str' object has no attribute '__name__'

For context, this means stuff like litellm.utils.function_to_dict won't work in express.