Python: Altair plots show unusable "save" menu

[isabelizimm]

Positron Version:

dev

Steps to reproduce the issue:

Run:

import altair as alt
import pandas as pd

source = pd.DataFrame({
    'a': ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'],
    'b': [28, 55, 43, 91, 81, 53, 19, 87, 52]
})

alt.Chart(source).mark_bar().encode(
    x='a',
    y='b'
)

What did you expect to happen?

Altair has their own "save" menu on the interactive plots that are used to save the plots in notebook environments. I'd expect this menu to either work or be suppressed.

Were there any error messages in the output or Developer Tools console?

Nope!

[juliasilge]

I consider this related to https://github.com/posit-dev/positron/issues/2559#issuecomment-2049254813 and maybe we should reconsider HTML like this going to the Plots pane at all (vs. the Viewer pane).

[seeM]

Here's the source code for the "actions" in this menu: https://github.com/vega/vega-embed/blob/c3b6c19bad7054e6a5ec0f3ca2647a888b4aac00/src/embed.ts#L488.

We could also choose which actions to show via the actions option.

[juliasilge]

This came up for a private beta user here: https://github.com/posit-dev/positron-beta/discussions/201

[testlabauto]

Verified Fixed

Positron Version(s) : 2024.07.0-113
OS Version          : OSX

Test scenario(s)

I was able to save the sample plot shared in the original filing.

Link(s) to TestRail test cases run or created: N/A