Version 3 adds breaking type annotations that do not comply with mypy

With the release of dash 3.0 our CI/CD fails for stuff that used to work.
Here's a minimum working example:

from dash import Dash, dcc, html
from dash.dependencies import Input, Output
from typing import Callable

app = Dash(__name__)

def create_layout() -> html.Div:
    return html.Div([
        dcc.Input(id='input-text', type='text', value='', placeholder='Enter text'),
        html.Div(id='output-text')
    ])  

app.layout = create_layout

@app.callback(Output('output-text', 'children'), Input('input-text', 'value'))
def update_output(value: str) -> str:
    return f'You entered: {value}'

if __name__ == '__main__':
    app.run(debug=True, port=9000)

running mypy on this file results in:

$ mypy t.py --strict
t.py:1: error: Skipping analyzing "dash": module is installed, but missing library stubs or py.typed marker  [import-untyped]
t.py:2: error: Skipping analyzing "dash.dependencies": module is installed, but missing library stubs or py.typed marker  [import-untyped]
t.py:2: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
t.py:15: error: Untyped decorator makes function "update_output" untyped  [misc]
Found 3 errors in 1 file (checked 1 source file)

which we used to solve by adding # type: ignore[misc] to every callback call and by adding

[[tool.mypy.overrides]]
module = [
  "dash.*",
  "dash_ag_grid",
  "dash_bootstrap_components.*",
  "plotly.*",
]
ignore_missing_imports = true

to our pyproject.toml.

However, when updating to version 3, we get:

$ mypy --strict t.py 
t.py:8: error: Returning Any from function declared to return "Div"  [no-any-return]
t.py:13: error: Property "layout" defined in "Dash" is read-only  [misc]
t.py:15: error: Call to untyped function "Input" in typed context  [no-untyped-call]
t.py:15: error: Call to untyped function "Output" in typed context  [no-untyped-call]
t.py:15: error: Call to untyped function "callback" in typed context  [no-untyped-call]
t.py:15: note: Error code "no-untyped-call" not covered by "type: ignore" comment
Found 5 errors in 1 file (checked 1 source file)

without changing anything else.

This can't be intended behavior, right? How to fix that?

community post: https://community.plotly.com/t/dash-3-0-fails-mypy/91308

Start with the minimal example in t.py and run mypy --strict to reproduce the reported errors. Inspect the Dash 3 annotations involved in Dash.layout, Input, Output, and callback, along with the pyproject.toml mypy overrides. Done means the example type-checks without the reported errors while preserving the documented Dash usage.