feat(world-overlay): render the visible map target list from a store

The world overlay presents its focusable mirror of painted cards through
subscribeWorldOverlayActions() and answers activateWorldOverlayAction();
the application shell publishes the list to a store and the scene chrome
renders the buttons and the status, announcing a repeated focus again.
The module stays free of Vue for the portable transit entry, and its
canvases remain painting surfaces.

docs/APPLICATION.md

@@ -211,7 +211,8 @@ out `scene-chrome` the before/after imagery dividers (the imagery still splits,
 with no line or handle to move it), the status chips, the toast, the ORBIT
 indicator, the FPS readout, the Scene actions panel, the data-pack attribution
 cards, the wind inspection marker, the Space Missions replay vehicle, the
-full-globe celestial ring and the screen-space map annotations;
+full-globe celestial ring, the screen-space map annotations and the
+visible map target list;
 leaving out `command-dock` the voice control and its pointer reticle; and
 leaving out `context` the Bhote Koshi reconstruction panel. An unknown
 view name is an error. A host that does not initialize Core's locale passes