Add seller performance dashboard charts

src/types.ts

@@ -56,6 +56,7 @@ export interface CreateUserResult {
 export interface DashboardAnalytics {
   totalRevenue: number;
   totalOrders: number;
+  orderLineCount?: number;
   averageOrderValue: number;
   salesByProduct: Array<{
     name: string;
@@ -67,6 +68,16 @@ export interface DashboardAnalytics {
     id: string;
     value: number;
   }>;
+  revenueBySeller?: Array<{
+    name: string;
+    id: string;
+    value: number;
+  }>;
+  ordersBySeller?: Array<{
+    name: string;
+    id: string;
+    value: number;
+  }>;
 }
 
 export interface ProductAnalyticsItem {