perf(query): 优化后台手机号精确查询

backend/internal/modules/distribution/repository_test.go

@@ -911,6 +911,17 @@ func TestDistributionReceivedListingsAndWallet(t *testing.T) {
 	if recPage.Total != 1 || len(recPage.Items) != 1 {
 		t.Fatalf("expected 1 received listing, got %d", recPage.Total)
 	}
+	phonePage, err := repo.ListReceivedListings(t.Context(), 0, site.ID, ReceivedListingQuery{
+		Page:     1,
+		PageSize: 10,
+		Keyword:  user.Phone,
+	})
+	if err != nil {
+		t.Fatalf("ListReceivedListings by phone failed: %v", err)
+	}
+	if phonePage.Total != 1 || phonePage.Items[0].ListingID != listing.ID {
+		t.Fatalf("expected listing %d by phone, got total=%d items=%+v", listing.ID, phonePage.Total, phonePage.Items)
+	}
 	item := recPage.Items[0]
 	if item.ListingNo != "RL-99001" || item.GameName != "delta_force" || item.OwnerNickname != "seller01" {
 		t.Fatalf("unexpected received listing: %+v", item)
@@ -1804,6 +1815,18 @@ func TestListOrdersPerformanceAndScoping(t *testing.T) {
 	if len(allPage.Items) != 2 {
 		t.Fatalf("expected 2 items, got %d", len(allPage.Items))
 	}
+	phonePage, err := repo.ListOrders(t.Context(), DistributionOrderListQuery{
+		SiteID:  0,
+		Page:    1,
+		Size:    10,
+		Keyword: u.Phone,
+	})
+	if err != nil {
+		t.Fatalf("ListOrders by phone failed: %v", err)
+	}
+	if phonePage.Total != 2 {
+		t.Fatalf("expected 2 distribution orders by renter phone, got %d", phonePage.Total)
+	}
 
 	// B. 分销商1查询其订单 (SiteID = site1.ID)
 	// 预期：只查出 distOrder1