Checklist

• I have searched the existing issues for similar issues.
• I added a very descriptive title to this issue.
• I have provided sufficient information below to help reproduce this issue.

Summary

When you click on the "fullscreen" toolbar icon on a Vega/Altair/built-in chart, the chart stretches to the full screen in height, but the width doesn't.

Reproducible Code Example

import streamlit as st
import pandas as pd
import numpy as np

chart_data = pd.DataFrame(np.random.randn(20, 3), columns=["a", "b", "c"])

st.line_chart(chart_data)

Steps To Reproduce

1. Hover the chart to see the toolbar.
2. Click on "Fullscreen" in the toolbar.

Expected Behavior

Chart should stretch to the entire width of the screen, just like it does for dataframes, Plotly charts, or maps.

Current Behavior

Chart only takes up ~1/3rd of the width of the screen.

Is this a regression?

• Yes, this used to work in a previous version.

Debug info

• Streamlit version: 1.46
• Python version:
• Operating System:
• Browser:

Additional Information

No response