feat(adminfinance): 退款数量拆分为全额退款与部分退款

- 按退款金额与原支付金额比较判定全额/部分退款
- 看板总退款卡片与每日表格增加全额/部分退款展示
- 保留 successful_refund_count 作为两者合计

backend/internal/modules/adminfinance/dto.go

@@ -37,6 +37,8 @@ type FinanceSummaryDTO struct {
 	EstimatedIncomeAmountCent   int64 `json:"estimated_income_amount_cent"`
 	SuccessfulPayCount          int64 `json:"successful_pay_count"`
 	SuccessfulRefundCount       int64 `json:"successful_refund_count"`
+	FullRefundCount             int64 `json:"full_refund_count"`
+	PartialRefundCount          int64 `json:"partial_refund_count"`
 	PendingRefundCount          int64 `json:"pending_refund_count"`
 	SettledOrderCount           int64 `json:"settled_order_count"`
 	PendingSettleOrderCount     int64 `json:"pending_settle_order_count"`
@@ -56,6 +58,8 @@ type FinanceDailyDTO struct {
 	EstimatedIncomeAmountCent   int64  `json:"estimated_income_amount_cent"`
 	SuccessfulPayCount          int64  `json:"successful_pay_count"`
 	SuccessfulRefundCount       int64  `json:"successful_refund_count"`
+	FullRefundCount             int64  `json:"full_refund_count"`
+	PartialRefundCount          int64  `json:"partial_refund_count"`
 	PendingRefundCount          int64  `json:"pending_refund_count"`
 	SettledOrderCount           int64  `json:"settled_order_count"`
 }