Merge main; give the HUD visibility test's camera a moveStart event

Main now listens to camera.moveStart in IntelHUD's constructor (#1384), so
the fake camera in src/hudPageVisibility.test.mjs needs that event too, as
hudAltitudeDatum.test.mjs already has. No change to the fix itself.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/hudPageVisibility.test.mjs

@@ -47,6 +47,7 @@ function installHiddenPage() {
       pitch: -Math.PI / 2,
       positionCartographic: { latitude: 0.7, longitude: -1.2, height: 500 },
       computeViewRectangle: () => undefined,
+      moveStart: { addEventListener() {}, removeEventListener() {} },
       moveEnd: { addEventListener() {}, removeEventListener() {} },
     },
   };