fix(mapbox): guard getProjection against throw when map style is not ready

[waterWang]

Description

getProjection() in @deck.gl/mapbox's deck-utils.ts can throw when the underlying map's style is not yet assigned, instead of returning undefined the way callers (getDefaultView / MapboxOverlay#_onAddInterleaved) expect for "not ready yet, default to mercator".

The existing optional-chaining (map.getProjection?.()) only guards against the method being absent, not against the call itself throwing. In maplibre-gl, Map.prototype.getProjection() is return this.style.getProjection() with no guard on this.style, so calling it before the style exists throws a TypeError.

This is reproducible under React 19 StrictMode: the dev-only double-invoke of mount effects adds, removes, and re-adds the same overlay, and the third addControl call hits a still-styleless map.

Fix

Wrap the map.getProjection?.() call in a try/catch and return 'mercator' as the safe default. This matches the callers' existing expectation — getDefaultView already treats any non-'globe' return as mercator.

Related

• PR fix(maplibre): Update default view once projection is known #9794 fixed a similar timing/undefined issue in the later _handleStyleChange callback path, but the fix did not cover this earlier onAdd-time call site.
• Fixes getProjection() in @deck.gl/mapbox can throw instead of returning undefined when called before the map's style is assigned #10549