Fix build: maplibre-gl 6 has no default export

[NullVoxPopuli-ai-agent]

The nightly build has been red on all three channels (release, beta, alpha) since the 2026-07-22 run — the last green one was 2026-07-21.

Cause

maplibre-gl@6.0.0 was published in that window. It ships a pure-ESM build (dist/maplibre-gl.mjs, "type": "module") that exports only named bindings — the default export that v5 provided is gone. Chapter 7 does import maplibregl from 'maplibre-gl', so the app build fails:

[MISSING_EXPORT] "default" is not exported by ".../maplibre-gl@6.0.0/dist/maplibre-gl.mjs".
   ╭─[ app/components/map.gjs:3:8 ]
   │
 3 │ import maplibregl from 'maplibre-gl';
   │        ─────┬────
   │             ╰────── Missing export
───╯

(release fails at the same line, as do beta and alpha.)

Fix

Use a namespace import in the three places chapter 7 shows the import line:

-import maplibregl from 'maplibre-gl';
+import * as maplibregl from 'maplibre-gl';

This is what MapLibre's own README now recommends, and it keeps working on maplibre-gl 5, so the tutorial isn't pinned to a single major. Everything downstream in the chapter is untouched — new maplibregl.Map(...) and new maplibregl.Marker() read exactly the same, so the prose still holds. I added one sentence explaining the * as form, since the tutorial walks through each import.

Verification

The full generator run needs a couple of things my machine doesn't have (tree, and the dev-server readiness handshake didn't settle locally), so I verified against the published output app, ember-learn/super-rentals, which is the exact code this chapter generates:

1. Installed maplibre-gl@6.0.0 into it and ran pnpm test → reproduced the identical MISSING_EXPORT build failure.
2. Applied only the import change above → pnpm test passes 25/25, including the four Integration | Component | map tests.
3. Loaded the app in a browser to confirm this isn't just a build-time fix: the map canvases mount at their configured size and the marker renders, so the chapter screenshots should still be produced.

🤖 Generated with Claude Code

[IgnaceMaes]

Ty mr agent!