Add modular dashboard widgets and layout editor

Introduces a modular dashboard system with draggable, configurable widgets including revenue, low stock, recent customers, and pending chats. Adds a dashboard editor for layout customization, widget visibility, and settings. Refactors dashboard content to use the new widget system and improves UI consistency and interactivity.

lib/services/analytics-service.ts

@@ -190,10 +190,12 @@ export const getCustomerInsights = async (
   storeId?: string,
   page: number = 1,
   limit: number = 10,
+  sortBy: string = "spent",
 ): Promise<CustomerInsights> => {
   const params = new URLSearchParams({
     page: page.toString(),
     limit: limit.toString(),
+    sort: sortBy,
   });
   if (storeId) params.append("storeId", storeId);
 
@@ -272,9 +274,10 @@ export const getProductPerformanceWithStore = async (): Promise<
 export const getCustomerInsightsWithStore = async (
   page: number = 1,
   limit: number = 10,
+  sortBy: string = "spent",
 ): Promise<CustomerInsights> => {
   const storeId = getStoreIdForUser();
-  return getCustomerInsights(storeId, page, limit);
+  return getCustomerInsights(storeId, page, limit, sortBy);
 };
 
 export const getOrderAnalyticsWithStore = async (