feat: add partner → campaign edges with distinct color to referral network

src/pages/ReferralNetwork/components/NetworkGraph.tsx

@@ -53,8 +53,13 @@ function buildFullGraph(graphData: NetworkGraphData): Graph {
       const edgeKey = `${edge.source}->${edge.target}`;
       if (!graph.hasEdge(edgeKey)) {
         graph.addEdgeWithKey(edgeKey, edge.source, edge.target, {
-          color: edge.type === 'campaign' ? 'rgba(77, 217, 192, 0.06)' : 'rgba(255,255,255,0.03)',
-          size: 0.3,
+          color:
+            edge.type === 'partner_campaign'
+              ? 'rgba(255, 138, 101, 0.5)'
+              : edge.type === 'campaign'
+                ? 'rgba(77, 217, 192, 0.06)'
+                : 'rgba(255,255,255,0.03)',
+          size: edge.type === 'partner_campaign' ? 1.5 : 0.3,
           edgeType: edge.type,
         });
       }

src/pages/ReferralNetwork/components/NetworkLegend.tsx

@@ -38,6 +38,13 @@ export function NetworkLegend({ className }: NetworkLegendProps) {
             <span className="text-xs text-dark-300">{t(item.labelKey)}</span>
           </div>
         ))}
+        {/* Partner → Campaign edge */}
+        <div className="flex items-center gap-2">
+          <div className="h-0.5 w-4 shrink-0 rounded-full" style={{ backgroundColor: '#ff8a65' }} />
+          <span className="text-xs text-dark-300">
+            {t('admin.referralNetwork.legend.partnerCampaignEdge')}
+          </span>
+        </div>
         {/* Campaign node with gradient to represent varying colors */}
         <div className="flex items-center gap-2">
           <div className="h-2.5 w-2.5 shrink-0 rounded-full" style={gradientStyle} />