plotly 6.1.2 not showing datetime for FigureWidget

[mgmarino]

The FigureWidget seems to be broken in plotly 6.0 when showing datetime types.

Reproduced using the example here

import plotly.graph_objects as go

import pandas as pd
df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/finance-charts-apple.csv').assign(Date=lambda x: pd.to_datetime(x.Date))

fig = go.Figure([go.Scatter(x=df['Date'], y=df['AAPL.High'])])
fig.show()

displays correctly with datetime:

With FigureWidget:

import plotly.graph_objects as go

import pandas as pd
df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/finance-charts-apple.csv').assign(Date=lambda x: pd.to_datetime(x.Date))

fig = go.FigureWidget([go.Scatter(x=df['Date'], y=df['AAPL.High'])])
fig.show()

shows the nanosecond ints:

This was run in VSCode (1.100.2) and also jupyterlab/server (lab == 4.4.3, jupyter-server == 2.16.0)

Seems similar to #5101.