chore: Update geo trace fitbounds default to 'locations'

[camdecoster]

Description

Updates the fitbounds default value to "locations" for geo traces. Also fixes (previously unknown) bug related to using zoom buttons with fitbounds active.

Closes #7885

Changes

• Changes default
• Update schema and types
• Persists view attributes to layout
• Added check for fitbounds incompatible projections (craig/satellite/albers-usa)
• Updates tests per above changes

Videos

Before (fitbounds: false, default)

Screencast.From.2026-07-09.15-30-04.mp4

Before (fitbounds: "locations")

Screencast.From.2026-07-09.16-51-23.mp4

After (fitbounds: "locations", default)

Screencast.From.2026-07-09.15-29-05.mp4

Testing

• Be on master
• Load Plotly devtools
• Open the mock geo_orthographic
• Note that the plot is centered on the US/Canada
• Switch to this branch
• Open the same mock
• Note that the plot is now centered on Asia

Notes

• fitbounds used to default to false. This changes the default to "locations".
• Any plot that wants to maintain the current view calculation will need to pass false to fitbounds
• This update matches the convention that most mapping libraries use
• The bug (fixed in this PR) meant that zoom button clicks had no effect on the view when fitbounds was active

[emilykl]

This test seems somewhat less useful now. Might be worth setting fitbounds: false on this one.

[emilykl]

This test still functions perfectly fine (i.e. if something goes wrong with tick0 for geo plots it will fail), but it might be worth setting a lower zoom level to make it more human-obvious what's going on here. Not a blocker.

[emilykl]

Do you know why the new image renders a smaller plot? Not a dealbreaker, but the previous version seems better.

[emilykl]

How does fitbounds choose a center when the geoJSON wraps all the way around the globe?

[emilykl]

The top plot doesn't look right, why is the orange line forced to wrap off the right edge?

[emilykl]

Green dotted line is cut off the top. Maybe this is an existing limitation with fitbounds, if so, it's not the end of the world but let's open an issue.

[emilykl]

Why this change?

[emilykl]

This doesn't seem correct

[emilykl]

It seems not ideal to show less of the southern latitudes when there's no more of the northern latitudes to be shown, would it be possible to add a constraint that the north edge of the map can't be lower than the top of the plot area in the initial render?

[emilykl]

This seems incorrect

[emilykl]

Again not totally clear to me how this centerpoint was chosen.

I mean, there's no reason the center has to be the Europe-centric map we're used to, although that does have the advantage of splitting fewer countries in half.

[emilykl]

Same comment here re: centerpoint

[emilykl]

Probably another one worth editing the mock to set fitbounds: false

[emilykl]

What happened here? This seems wrong

[emilykl]

This also seems wrong