Add RFM segmentation analytics

src/dataService.ts

@@ -1,4 +1,4 @@
-import type { CampaignPreview, CampaignProcessSummary, CampaignQueueSummary, DashboardAnalytics, DateRange, OrderData, StockData } from './types';
+import type { CampaignPreview, CampaignProcessSummary, CampaignQueueSummary, DashboardAnalytics, DateRange, OrderData, RfmAnalytics, StockData } from './types';
 
 const API_URL = import.meta.env.VITE_API_URL || '/api';
 
@@ -111,6 +111,21 @@ export const fetchDashboardAnalytics = async (dateRange: DateRange): Promise<Das
     }
 };
 
+export const fetchRfmAnalytics = async (dateRange: DateRange): Promise<RfmAnalytics | null> => {
+    try {
+        const params = new URLSearchParams({
+            start: formatDateParam(dateRange.start),
+            end: formatDateParam(dateRange.end)
+        });
+        const response = await authFetch(`/analytics/rfm?${params.toString()}`);
+        if (!response.ok) return null;
+        return await response.json();
+    } catch (error) {
+        console.error('Fetch RFM analytics failed', error);
+        return null;
+    }
+};
+
 export const fetchCampaigns = async (): Promise<CampaignQueueSummary | null> => {
     try {
         const response = await authFetch('/campaigns');