Make the region map a square

src/pages/SystemView.tsx

@@ -189,7 +189,7 @@ export const SystemView = () => {
             {/* Regional overview map */}
             <div className="lg:col-span-1 flex flex-col">
               {region ? (
-                <div className="h-96 border border-purple-500/30 rounded-lg overflow-hidden flex flex-col">
+                <div className="w-full aspect-square border border-purple-500/30 rounded-lg overflow-hidden flex flex-col">
                   <div className="flex-shrink-0 p-2 border-b border-purple-500/30 bg-black/20 backdrop-blur-sm">
                     <h3 className="text-white text-sm font-semibold">{region} Region</h3>
                     <p className="text-purple-200 text-xs">Click systems to navigate • Current: {system}</p>