优化后台高频查询性能

backend/internal/modules/adminfinance/dashboard.go

@@ -7,6 +7,9 @@ import (
 )
 
 func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*DashboardDTO, error) {
+	if cached := r.loadDashboardCache(ctx, query); cached != nil {
+		return cached, nil
+	}
 	dailyItems, err := r.dailyItems(ctx, query)
 	if err != nil {
 		return nil, err
@@ -31,7 +34,7 @@ func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*Dash
 	if err != nil {
 		return nil, err
 	}
-	return &DashboardDTO{
+	result := &DashboardDTO{
 		Summary:                 *summary,
 		DailyItems:              dailyItems,
 		PickupSummary:           *pickup,
@@ -39,7 +42,9 @@ func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*Dash
 		DisbursementSummary:     *disbursement,
 		OperatingExpenseSummary: *operatingExpense,
 		GeneratedAt:             timeutil.ShanghaiNow(),
-	}, nil
+	}
+	r.storeDashboardCache(ctx, query, result)
+	return result, nil
 }
 
 func (r *Repository) operatingExpenseSummary(ctx context.Context, query DashboardQuery) (*OperatingExpenseSummaryDTO, error) {