feat: add GeoMap component for visualizing country-specific scan data.

src/components/analytics/GeoMap.tsx

@@ -144,8 +144,16 @@ const GeoMap: React.FC<GeoMapProps> = ({ countryStats, totalScans }) => {
     .domain([0, maxCount || 1])
     .range(['#E0F2FE', '#1E40AF']);
 
+  const [tooltipContent, setTooltipContent] = React.useState<{ name: string; count: number } | null>(null);
+  const [tooltipPos, setTooltipPos] = React.useState({ x: 0, y: 0 });
+
   return (
-    <div className="w-full h-full">
+    <div
+      className="w-full h-full relative group"
+      onMouseMove={(evt) => {
+        setTooltipPos({ x: evt.clientX, y: evt.clientY });
+      }}
+    >
       <ComposableMap
         projection="geoMercator"
         projectionConfig={{
@@ -179,6 +187,13 @@ const GeoMap: React.FC<GeoMapProps> = ({ countryStats, totalScans }) => {
                       },
                       pressed: { outline: 'none' },
                     }}
+                    onMouseEnter={() => {
+                      const { name } = geo.properties;
+                      setTooltipContent({ name, count: scanCount });
+                    }}
+                    onMouseLeave={() => {
+                      setTooltipContent(null);
+                    }}
                   />
                 );
               })
@@ -186,6 +201,24 @@ const GeoMap: React.FC<GeoMapProps> = ({ countryStats, totalScans }) => {
           </Geographies>
         </ZoomableGroup>
       </ComposableMap>
+
+      {tooltipContent && (
+        <div
+          className="fixed z-50 px-3 py-2 text-sm font-medium text-white bg-gray-900 rounded-lg shadow-xl pointer-events-none transform -translate-x-1/2 -translate-y-full"
+          style={{
+            left: tooltipPos.x,
+            top: tooltipPos.y - 10,
+          }}
+        >
+          <div className="flex items-center gap-2">
+            <span>{tooltipContent.name}</span>
+            <span className="text-gray-400">|</span>
+            <span className="font-bold text-blue-400">{tooltipContent.count} scans</span>
+          </div>
+          {/* Arrow */}
+          <div className="absolute bottom-0 left-1/2 -translate-x-1/2 translate-y-full w-0 h-0 border-l-4 border-r-4 border-t-4 border-l-transparent border-r-transparent border-t-gray-900"></div>
+        </div>
+      )}
     </div>
   );
 };