[BUG]: I cannot have reliable way of positioning title and legend on top without overlapping each other

Description

As plotly is responsive there's currently no way to place both legend and title on the top of the chart so that title and legend do not overlap (seems legend doesn't take into account title/subtitle). I know I have some tools which can help (like setting top margin/playing with y/maxheight/yref) but all of them aren't reliable as resizing the window (thus resizing the chart)/having long trace names/etc breaks all hardcoded configurations.

Steps to reproduce

Here's the demo: https://python-fiddle.com/examples/plotly?checkpoint=1757947390
Code behind it:

import plotly.express as px

df = px.data.gapminder().query("year==2007")
fig = px.scatter(df, x="gdpPercap", y="lifeExp", color="continent",
    size="pop", size_max=45, log_x=True)

fig.update_layout(legend=dict(
    orientation="h",
    entrywidth=70,
    yanchor="bottom",
    y=1.02,
    xanchor="center",
    x=1
))

fig.update_layout(title="Very long loong long long long title")

fig.show()

Notes

I'm posting python code here intentionally as I think this is the basic issue of the plotly.js rather than lack of configuration/bugs in Python wrapper.

Start with the linked Python-Fiddle reproduction and trace the plotly.js responsive layout behavior for a long title and horizontal legend. Confirm the result by resizing the chart and varying trace-name length; done means the title and legend remain non-overlapping without hardcoded spacing, with a regression check covering the reproduction.