新增支付配置备份导出功能

backend/internal/modules/paymentconfig/handler.go

@@ -1,8 +1,10 @@
 package paymentconfig
 
 import (
+	"encoding/json"
 	"net/http"
 	"strconv"
+	"time"
 
 	"hfb_sys/backend/internal/middleware"
 	"hfb_sys/backend/pkg/response"
@@ -73,6 +75,40 @@ func (h *Handler) Get(c *gin.Context) {
 	response.OK(c, config)
 }
 
+// ExportBackup 导出支付配置备份
+// @Summary 导出支付配置备份
+// @Tags 管理后台-支付配置
+// @Success 200 {file} file "支付配置备份 JSON"
+// @Router /admin/payment-configs/export [get]
+func (h *Handler) ExportBackup(c *gin.Context) {
+	adminID, ok := currentAdminID(c)
+	if !ok {
+		response.Unauthorized(c, "未授权")
+		return
+	}
+
+	backup, err := h.service.ExportBackup(adminID, auditMeta(c))
+	if err == ErrDecryptionFailed {
+		response.Error(c, http.StatusInternalServerError, "decrypt_failed", "密钥解密失败")
+		return
+	}
+	if err != nil {
+		response.Error(c, http.StatusInternalServerError, "internal_error", "导出失败")
+		return
+	}
+
+	data, err := json.MarshalIndent(backup, "", "  ")
+	if err != nil {
+		response.Error(c, http.StatusInternalServerError, "internal_error", "导出失败")
+		return
+	}
+
+	filename := "payment-config-backup-" + time.Now().Format("20060102-150405") + ".json"
+	contentType := "application/json; charset=utf-8"
+	c.Header("Content-Disposition", `attachment; filename="`+filename+`"`)
+	c.Data(http.StatusOK, contentType, data)
+}
+
 // Create 创建支付配置
 // @Summary 创建支付配置
 // @Tags 管理后台-支付配置