fix(geoportal): use absolute inset-0 on MapViewer wrapper (fixes 0-height canvas)

h-full (height:100%) doesn't propagate through absolutely positioned
parents. The MapLibre container had width=1065 but height=0. Using
absolute inset-0 on the wrapper fills the parent directly via positioning
instead of percentage height.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/geoportal/components/map-viewer.tsx

@@ -570,7 +570,7 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
     }, [center, zoom, mapReady]);
 
     return (
-      <div className={cn("relative w-full h-full min-h-[400px]", className)}>
+      <div className={cn("absolute inset-0", className)}>
         <div ref={containerRef} className="absolute inset-0" />
         {!mapReady && (
           <div className="absolute inset-0 flex items-center justify-center bg-muted/50">