Add multi-series charts and enhance dashboard functionality

distribution_fe/lib/api/reports.ts

@@ -159,3 +159,41 @@ export const productReports = {
   summary: (params?: Pick<ProductReportParams, 'brandId' | 'categoryId' | 'warehouseId' | 'from' | 'to'>) =>
     api.get<ProductReportSummary>('/reports/products/summary', { params }).then(r => r.data),
 }
+
+export interface SalesKpis {
+  grossSales: number
+  returnValue: number
+  netSales: number
+  orders: number
+  averageOrderValue: number
+  grossProfit: number
+  grossProfitMarginPercent: number | null
+}
+
+export interface DashboardSalesSummary {
+  from: string
+  to: string
+  granularity: 'day' | 'month'
+  kpis: { current: SalesKpis; previous: SalesKpis; previousFrom: string; previousTo: string }
+  trend: Array<{ period: string; sales: number; returns: number }>
+  byCategory: Array<{ id: string | null; name: string; amount: number }>
+  byRegion: Array<{ id: string | null; name: string; amount: number }>
+  byRep: Array<{ id: string | null; name: string; amount: number }>
+}
+
+export interface DashboardInventorySummary {
+  from: string
+  to: string
+  granularity: 'day' | 'month'
+  valueByCategory: Array<{ category: string; quantity: number; value: number }>
+  byWarehouse: Array<{ warehouseId: string; name: string; quantity: number; value: number }>
+  movementTrend: Array<{ period: string; received: number; issued: number; net: number }>
+}
+
+export const dashboardReports = {
+  sales: (params?: { from?: string; to?: string; regionId?: string; categoryId?: string }) =>
+    api.get<DashboardSalesSummary>('/reports/dashboard/sales', { params }).then(r => r.data),
+
+  inventory: (params?: { from?: string; to?: string; warehouseId?: string; categoryId?: string }) =>
+    api.get<DashboardInventorySummary>('/reports/dashboard/inventory', { params }).then(r => r.data),
+}