feat: add shipping template management and update favicon

backend/internal/api/handlers/order.go

@@ -300,14 +300,80 @@ func (h *OrderHandler) Create(c *gin.Context) {
 		break
 	}
 
-	var shippingFeeFirstWeight, shippingFeePerGram, serviceFeeRate, taxRate, channelFeeRate float64
+	// 获取收货地址省份
+	var shippingAddress models.Address
+	var province string
+	if err := utils.DB.First(&shippingAddress, req.ShippingAddressID).Error; err == nil {
+		province = shippingAddress.Province
+	}
+
+	// 使用运费模板计算运费
+	shippingFee := 0.0
+
+	// 按运费模板分组计算
+	type TemplateGroup struct {
+		TemplateID *uint
+		Weight     float64
+		Quantity   int
+		Subtotal   float64
+	}
+	templateGroups := make(map[uint]*TemplateGroup)
+	noTemplateGroup := &TemplateGroup{Subtotal: 0, Weight: 0, Quantity: 0}
+
+	for _, cart := range carts {
+		var templateID uint
+		if cart.Product.ShippingTemplateID != nil {
+			templateID = *cart.Product.ShippingTemplateID
+		}
+
+		if templateID == 0 {
+			// 没有运费模板，累加到无模板组
+			noTemplateGroup.Weight += cart.Product.Weight * float64(cart.Quantity)
+			noTemplateGroup.Quantity += cart.Quantity
+			noTemplateGroup.Subtotal += cart.Product.Price * float64(cart.Quantity)
+		} else {
+			if _, ok := templateGroups[templateID]; !ok {
+				templateGroups[templateID] = &TemplateGroup{
+					TemplateID: &templateID,
+					Weight:     0,
+					Quantity:   0,
+					Subtotal:   0,
+				}
+			}
+			templateGroups[templateID].Weight += cart.Product.Weight * float64(cart.Quantity)
+			templateGroups[templateID].Quantity += cart.Quantity
+			templateGroups[templateID].Subtotal += cart.Product.Price * float64(cart.Quantity)
+		}
+	}
+
+	// 计算有模板的运费
+	for _, group := range templateGroups {
+		fee, _ := CalculateShippingFee(group.TemplateID, group.Weight, group.Quantity, group.Subtotal, province)
+		shippingFee += fee
+	}
+
+	// 计算无模板的运费（使用旧的系统设置）
+	if noTemplateGroup.Subtotal > 0 {
+		var shippingFeeFirstWeight, shippingFeePerGram float64
+		var setting models.SystemSetting
+		if err := utils.DB.Where("`key` = ?", "shipping_fee_first_weight").First(&setting).Error; err == nil {
+			shippingFeeFirstWeight, _ = strconv.ParseFloat(setting.Value, 64)
+		}
+		if err := utils.DB.Where("`key` = ?", "shipping_fee_per_gram").First(&setting).Error; err == nil {
+			shippingFeePerGram, _ = strconv.ParseFloat(setting.Value, 64)
+		}
+		if noTemplateGroup.Subtotal < 99 && shippingFeeFirstWeight > 0 {
+			fee := shippingFeeFirstWeight
+			if noTemplateGroup.Weight > 500 {
+				fee += shippingFeePerGram * (noTemplateGroup.Weight - 500)
+			}
+			shippingFee += fee
+		}
+	}
+
+	// 获取其他费率
+	var serviceFeeRate, taxRate, channelFeeRate float64
 	var setting models.SystemSetting
-	if err := utils.DB.Where("`key` = ?", "shipping_fee_first_weight").First(&setting).Error; err == nil {
-		shippingFeeFirstWeight, _ = strconv.ParseFloat(setting.Value, 64)
-	}
-	if err := utils.DB.Where("`key` = ?", "shipping_fee_per_gram").First(&setting).Error; err == nil {
-		shippingFeePerGram, _ = strconv.ParseFloat(setting.Value, 64)
-	}
 	if err := utils.DB.Where("`key` = ?", "service_fee_rate").First(&setting).Error; err == nil {
 		serviceFeeRate, _ = strconv.ParseFloat(setting.Value, 64)
 	}
@@ -318,15 +384,6 @@ func (h *OrderHandler) Create(c *gin.Context) {
 		channelFeeRate, _ = strconv.ParseFloat(setting.Value, 64)
 	}
 
-	// 根据商品重量计算运费
-	shippingFee := 0.0
-	if subtotal < 99 && shippingFeeFirstWeight > 0 {
-		shippingFee = shippingFeeFirstWeight
-		if totalWeight > 500 {
-			shippingFee += shippingFeePerGram * (totalWeight - 500)
-		}
-	}
-
 	serviceFee := subtotal * serviceFeeRate / 100
 	tax := subtotal * taxRate / 100
 	channelFee := subtotal * channelFeeRate / 100

backend/internal/api/handlers/product.go

@@ -225,7 +225,7 @@ func (h *ProductHandler) GetByID(c *gin.Context) {
 
 func (h *ProductHandler) AdminList(c *gin.Context) {
 	var products []models.Product
-	utils.DB.Preload("Categories").Preload("Brand").Order("created_at DESC").Find(&products)
+	utils.DB.Preload("Categories").Preload("Brand").Preload("ShippingTemplate").Order("created_at DESC").Find(&products)
 	c.JSON(http.StatusOK, gin.H{"data": products})
 }
 
@@ -237,22 +237,23 @@ func (h *ProductHandler) Create(c *gin.Context) {
 	}
 
 	product := models.Product{
-		Name:          req.Name,
-		Description:   req.Description,
-		Price:         req.Price,
-		Weight:        req.Weight,
-		MinPurchase:   req.MinPurchase,
-		MaxPurchase:   req.MaxPurchase,
-		MinWeight:     req.MinWeight,
-		MaxWeight:     req.MaxWeight,
-		MinAmount:     req.MinAmount,
-		MaxAmount:     req.MaxAmount,
-		RequireCredit: req.RequireCredit,
-		CreditCost:    req.CreditCost,
-		CreditReward:  req.CreditReward,
-		Images:        req.Images,
-		BrandID:       req.BrandID,
-		IsActive:      true,
+		Name:              req.Name,
+		Description:       req.Description,
+		Price:             req.Price,
+		Weight:            req.Weight,
+		MinPurchase:       req.MinPurchase,
+		MaxPurchase:       req.MaxPurchase,
+		MinWeight:         req.MinWeight,
+		MaxWeight:         req.MaxWeight,
+		MinAmount:         req.MinAmount,
+		MaxAmount:         req.MaxAmount,
+		RequireCredit:     req.RequireCredit,
+		CreditCost:        req.CreditCost,
+		CreditReward:      req.CreditReward,
+		Images:            req.Images,
+		BrandID:           req.BrandID,
+		ShippingTemplateID: req.ShippingTemplateID,
+		IsActive:          true,
 	}
 
 	if err := utils.DB.Create(&product).Error; err != nil {
@@ -276,7 +277,7 @@ func (h *ProductHandler) Create(c *gin.Context) {
 		}
 	}
 
-	utils.DB.Preload("Categories").Preload("CustomFields").Preload("Brand").First(&product, product.ID)
+	utils.DB.Preload("Categories").Preload("CustomFields").Preload("Brand").Preload("ShippingTemplate").First(&product, product.ID)
 	c.JSON(http.StatusCreated, gin.H{"data": product})
 }
 
@@ -343,6 +344,9 @@ func (h *ProductHandler) Update(c *gin.Context) {
 	if req.BrandID != nil {
 		updates["brand_id"] = *req.BrandID
 	}
+	if req.ShippingTemplateID != nil {
+		updates["shipping_template_id"] = *req.ShippingTemplateID
+	}
 
 	utils.DB.Model(&product).Updates(updates)
 
@@ -363,7 +367,7 @@ func (h *ProductHandler) Update(c *gin.Context) {
 		}
 	}
 
-	utils.DB.Preload("Categories").Preload("CustomFields").Preload("Brand").First(&product, product.ID)
+	utils.DB.Preload("Categories").Preload("CustomFields").Preload("Brand").Preload("ShippingTemplate").First(&product, product.ID)
 	c.JSON(http.StatusOK, gin.H{"data": product})
 }
 

backend/internal/api/handlers/shipping_template.go

@@ -0,0 +1,260 @@
+package handlers
+
+import (
+	"encoding/json"
+	"math"
+	"net/http"
+	"strconv"
+
+	"sale/internal/models"
+	"sale/internal/schemas"
+	"sale/internal/utils"
+
+	"github.com/gin-gonic/gin"
+)
+
+type ShippingTemplateHandler struct{}
+
+func NewShippingTemplateHandler() *ShippingTemplateHandler {
+	return &ShippingTemplateHandler{}
+}
+
+// List 获取运费模板列表
+func (h *ShippingTemplateHandler) List(c *gin.Context) {
+	var templates []models.ShippingTemplate
+	utils.DB.Order("sort_order ASC, id ASC").Find(&templates)
+
+	// 解析 provinces JSON 为数组
+	type TemplateResponse struct {
+		models.ShippingTemplate
+		ProvincesList []string `json:"provinces_list"`
+	}
+
+	var response []TemplateResponse
+	for _, t := range templates {
+		var provinces []string
+		if t.Provinces != "" {
+			json.Unmarshal([]byte(t.Provinces), &provinces)
+		}
+		response = append(response, TemplateResponse{
+			ShippingTemplate: t,
+			ProvincesList:    provinces,
+		})
+	}
+
+	c.JSON(http.StatusOK, gin.H{"data": response})
+}
+
+// GetByID 获取单个运费模板
+func (h *ShippingTemplateHandler) GetByID(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+	var template models.ShippingTemplate
+	if err := utils.DB.First(&template, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "运费模板不存在"})
+		return
+	}
+
+	var provinces []string
+	if template.Provinces != "" {
+		json.Unmarshal([]byte(template.Provinces), &provinces)
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"data": gin.H{
+			"ShippingTemplate": template,
+			"provinces_list":  provinces,
+		},
+	})
+}
+
+// Create 创建运费模板
+func (h *ShippingTemplateHandler) Create(c *gin.Context) {
+	var req schemas.CreateShippingTemplateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	// 如果设为默认，先取消其他默认模板
+	if req.IsDefault {
+		utils.DB.Model(&models.ShippingTemplate{}).Where("is_default = ?", true).Update("is_default", false)
+	}
+
+	// 序列化省份列表
+	var provincesJSON string
+	if len(req.Provinces) > 0 {
+		data, _ := json.Marshal(req.Provinces)
+		provincesJSON = string(data)
+	}
+
+	template := models.ShippingTemplate{
+		Name:           req.Name,
+		CalcType:       req.CalcType,
+		FirstUnit:      req.FirstUnit,
+		FirstFee:       req.FirstFee,
+		AdditionalUnit: req.AdditionalUnit,
+		AdditionalFee:  req.AdditionalFee,
+		FreeAmount:     req.FreeAmount,
+		Provinces:      provincesJSON,
+		IsDefault:      req.IsDefault,
+		SortOrder:      req.SortOrder,
+	}
+
+	if err := utils.DB.Create(&template).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建运费模板失败"})
+		return
+	}
+
+	c.JSON(http.StatusCreated, gin.H{"data": template})
+}
+
+// Update 更新运费模板
+func (h *ShippingTemplateHandler) Update(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+	var template models.ShippingTemplate
+	if err := utils.DB.First(&template, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "运费模板不存在"})
+		return
+	}
+
+	var req schemas.UpdateShippingTemplateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	updates := make(map[string]interface{})
+
+	if req.Name != nil {
+		updates["name"] = *req.Name
+	}
+	if req.CalcType != nil {
+		updates["calc_type"] = *req.CalcType
+	}
+	if req.FirstUnit != nil {
+		updates["first_unit"] = *req.FirstUnit
+	}
+	if req.FirstFee != nil {
+		updates["first_fee"] = *req.FirstFee
+	}
+	if req.AdditionalUnit != nil {
+		updates["additional_unit"] = *req.AdditionalUnit
+	}
+	if req.AdditionalFee != nil {
+		updates["additional_fee"] = *req.AdditionalFee
+	}
+	if req.FreeAmount != nil {
+		updates["free_amount"] = *req.FreeAmount
+	}
+	if req.Provinces != nil {
+		if len(req.Provinces) > 0 {
+			data, _ := json.Marshal(req.Provinces)
+			updates["provinces"] = string(data)
+		} else {
+			updates["provinces"] = ""
+		}
+	}
+	if req.IsDefault != nil {
+		if *req.IsDefault {
+			utils.DB.Model(&models.ShippingTemplate{}).Where("is_default = ? AND id != ?", true, id).Update("is_default", false)
+		}
+		updates["is_default"] = *req.IsDefault
+	}
+	if req.SortOrder != nil {
+		updates["sort_order"] = *req.SortOrder
+	}
+
+	utils.DB.Model(&template).Updates(updates)
+	utils.DB.First(&template, id)
+
+	c.JSON(http.StatusOK, gin.H{"data": template})
+}
+
+// Delete 删除运费模板
+func (h *ShippingTemplateHandler) Delete(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+
+	var template models.ShippingTemplate
+	if err := utils.DB.First(&template, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "运费模板不存在"})
+		return
+	}
+
+	// 检查是否有关联的商品
+	var count int64
+	utils.DB.Model(&models.Product{}).Where("shipping_template_id = ?", id).Count(&count)
+	if count > 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "该运费模板已被商品关联，无法删除"})
+		return
+	}
+
+	if err := utils.DB.Delete(&template).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "删除运费模板失败"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "删除成功"})
+}
+
+// CalculateShippingFee 计算运费（供内部调用）
+func CalculateShippingFee(templateID *uint, weight float64, quantity int, subtotal float64, province string) (float64, error) {
+	var template models.ShippingTemplate
+
+	// 如果没有指定模板，使用默认模板
+	if templateID == nil || *templateID == 0 {
+		if err := utils.DB.Where("is_default = ?", true).First(&template).Error; err != nil {
+			// 没有默认模板，运费为0
+			return 0, nil
+		}
+	} else {
+		if err := utils.DB.First(&template, *templateID).Error; err != nil {
+			// 模板不存在，使用默认模板
+			if err := utils.DB.Where("is_default = ?", true).First(&template).Error; err != nil {
+				return 0, nil
+			}
+		}
+	}
+
+	// 检查适用地区
+	if template.Provinces != "" && province != "" {
+		var provinces []string
+		json.Unmarshal([]byte(template.Provinces), &provinces)
+		matched := false
+		for _, p := range provinces {
+			if p == province {
+				matched = true
+				break
+			}
+		}
+		if !matched {
+			// 地址不在适用范围内，使用默认模板
+			var defaultTemplate models.ShippingTemplate
+			if err := utils.DB.Where("is_default = ?", true).First(&defaultTemplate).Error; err == nil {
+				template = defaultTemplate
+			}
+		}
+	}
+
+	// 检查是否满足包邮条件
+	if template.FreeAmount > 0 && subtotal >= template.FreeAmount {
+		return 0, nil
+	}
+
+	// 根据计费方式计算运费
+	var totalUnit float64
+	if template.CalcType == models.CalcTypeWeight {
+		totalUnit = weight // 重量（克）
+	} else {
+		totalUnit = float64(quantity) // 件数
+	}
+
+	// 计算运费
+	if totalUnit <= template.FirstUnit {
+		return template.FirstFee, nil
+	}
+
+	remainingUnit := totalUnit - template.FirstUnit
+	additionalCount := math.Ceil(remainingUnit / template.AdditionalUnit)
+
+	return template.FirstFee + additionalCount*template.AdditionalFee, nil
+}

backend/internal/api/routes/routes.go

@@ -27,6 +27,7 @@ func SetupRoutes(r *gin.Engine) {
 	paymentHandler := handlers.NewPaymentHandler()
 	logHandler := handlers.NewLogHandler()
 	purchaseGroupHandler := handlers.NewPurchaseGroupHandler()
+	shippingTemplateHandler := handlers.NewShippingTemplateHandler()
 
 	r.Use(middlewares.CORSMiddleware())
 
@@ -250,6 +251,15 @@ func SetupRoutes(r *gin.Engine) {
 				admin.GET("/logs", logHandler.GetLogs)
 				admin.DELETE("/logs", logHandler.ClearLogs)
 				admin.GET("/logs/info", logHandler.GetLogInfo)
+
+				adminShippingTemplates := admin.Group("/shipping-templates")
+				{
+					adminShippingTemplates.GET("", shippingTemplateHandler.List)
+					adminShippingTemplates.GET("/:id", shippingTemplateHandler.GetByID)
+					adminShippingTemplates.POST("", shippingTemplateHandler.Create)
+					adminShippingTemplates.PUT("/:id", shippingTemplateHandler.Update)
+					adminShippingTemplates.DELETE("/:id", shippingTemplateHandler.Delete)
+				}
 			}
 		}
 	}

backend/internal/models/product.go

@@ -7,29 +7,31 @@ import (
 )
 
 type Product struct {
-	ID            uint           `gorm:"primaryKey" json:"id"`
-	Name          string         `gorm:"size:255;not null" json:"name"`
-	Description   string         `json:"description"`
-	Price         float64        `gorm:"type:decimal(10,2);not null" json:"price"`
-	Weight        float64        `gorm:"type:decimal(10,2);default:0" json:"weight"` // 商品克重（克）
-	MinPurchase   int            `gorm:"default:1" json:"min_purchase"`
-	MaxPurchase   *int           `json:"max_purchase"`
-	MinWeight     *float64       `json:"min_weight"`
-	MaxWeight     *float64       `json:"max_weight"`
-	MinAmount     *float64       `json:"min_amount"`
-	MaxAmount     *float64       `json:"max_amount"`
-	RequireCredit bool           `gorm:"default:false" json:"require_credit"`
-	CreditCost    int            `gorm:"default:0" json:"credit_cost"`
-	CreditReward  int            `gorm:"default:0" json:"credit_reward"`
-	Images        string         `gorm:"type:text" json:"images"`
-	IsActive      bool           `gorm:"default:true" json:"is_active"`
-	BrandID       *uint          `json:"brand_id"`
-	Brand         *Brand         `json:"brand,omitempty"`
-	CreatedAt     time.Time      `json:"created_at"`
-	UpdatedAt     time.Time      `json:"updated_at"`
-	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
-	Categories    []Category     `gorm:"many2many:product_categories;" json:"categories,omitempty"`
-	CustomFields  []ProductCustomField `json:"custom_fields,omitempty"`
+	ID               uint           `gorm:"primaryKey" json:"id"`
+	Name             string         `gorm:"size:255;not null" json:"name"`
+	Description      string         `json:"description"`
+	Price            float64        `gorm:"type:decimal(10,2);not null" json:"price"`
+	Weight           float64        `gorm:"type:decimal(10,2);default:0" json:"weight"` // 商品克重（克）
+	MinPurchase      int            `gorm:"default:1" json:"min_purchase"`
+	MaxPurchase      *int           `json:"max_purchase"`
+	MinWeight        *float64       `json:"min_weight"`
+	MaxWeight        *float64       `json:"max_weight"`
+	MinAmount        *float64       `json:"min_amount"`
+	MaxAmount        *float64       `json:"max_amount"`
+	RequireCredit    bool           `gorm:"default:false" json:"require_credit"`
+	CreditCost       int            `gorm:"default:0" json:"credit_cost"`
+	CreditReward     int            `gorm:"default:0" json:"credit_reward"`
+	Images           string         `gorm:"type:text" json:"images"`
+	IsActive         bool           `gorm:"default:true" json:"is_active"`
+	BrandID          *uint          `json:"brand_id"`
+	Brand            *Brand         `json:"brand,omitempty"`
+	ShippingTemplateID *uint        `json:"shipping_template_id"`
+	ShippingTemplate *ShippingTemplate `json:"shipping_template,omitempty"`
+	CreatedAt        time.Time      `json:"created_at"`
+	UpdatedAt        time.Time      `json:"updated_at"`
+	DeletedAt        gorm.DeletedAt `gorm:"index" json:"-"`
+	Categories       []Category     `gorm:"many2many:product_categories;" json:"categories,omitempty"`
+	CustomFields     []ProductCustomField `json:"custom_fields,omitempty"`
 }
 
 func (Product) TableName() string {

backend/internal/models/shipping_template.go

@@ -0,0 +1,35 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// ShippingTemplate 运费模板
+type ShippingTemplate struct {
+	ID            uint           `gorm:"primaryKey" json:"id"`
+	Name          string         `gorm:"size:255;not null" json:"name"`                     // 模板名称（如"江浙沪包邮"、"偏远地区"）
+	CalcType      string         `gorm:"size:20;not null;default:'weight'" json:"calc_type"` // 计费方式：weight=按重量, piece=按件数
+	FirstUnit     float64        `gorm:"type:decimal(10,2);not null" json:"first_unit"`     // 首重/首件数量
+	FirstFee      float64        `gorm:"type:decimal(10,2);not null" json:"first_fee"`      // 首重/首件价格
+	AdditionalUnit float64       `gorm:"type:decimal(10,2);not null" json:"additional_unit"` // 续重/续件数量
+	AdditionalFee float64        `gorm:"type:decimal(10,2);not null" json:"additional_fee"` // 续重/续件价格
+	FreeAmount    float64        `gorm:"type:decimal(10,2);default:0" json:"free_amount"`   // 包邮金额（0表示不包邮）
+	Provinces     string         `gorm:"type:text" json:"provinces"`                        // 适用省份列表（JSON数组，为空表示全国）
+	IsDefault     bool           `gorm:"default:false" json:"is_default"`                   // 是否默认模板
+	SortOrder     int            `gorm:"default:0" json:"sort_order"`                       // 排序
+	CreatedAt     time.Time      `json:"created_at"`
+	UpdatedAt     time.Time      `json:"updated_at"`
+	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
+}
+
+func (ShippingTemplate) TableName() string {
+	return "shipping_templates"
+}
+
+// 计费方式常量
+const (
+	CalcTypeWeight = "weight" // 按重量计费
+	CalcTypePiece  = "piece"  // 按件数计费
+)

backend/internal/schemas/product.go

@@ -41,44 +41,46 @@ type UpdatePurchaseGroupRequest struct {
 }
 
 type CreateProductRequest struct {
-	Name          string                 `json:"name" binding:"required"`
-	Description   string                 `json:"description"`
-	Price         float64                `json:"price" binding:"gte=0"`
-	Weight        float64                `json:"weight"`
-	MinPurchase   int                    `json:"min_purchase"`
-	MaxPurchase   *int                   `json:"max_purchase"`
-	MinWeight     *float64               `json:"min_weight"`
-	MaxWeight     *float64               `json:"max_weight"`
-	MinAmount     *float64               `json:"min_amount"`
-	MaxAmount     *float64               `json:"max_amount"`
-	RequireCredit bool                   `json:"require_credit"`
-	CreditCost    int                    `json:"credit_cost"`
-	CreditReward  int                    `json:"credit_reward"`
-	Images        string                 `json:"images"`
-	BrandID       *uint                  `json:"brand_id"`
-	CategoryIDs   []uint                 `json:"category_ids"`
-	CustomFields  []CustomFieldRequest   `json:"custom_fields"`
+	Name              string                 `json:"name" binding:"required"`
+	Description       string                 `json:"description"`
+	Price             float64                `json:"price" binding:"gte=0"`
+	Weight            float64                `json:"weight"`
+	MinPurchase       int                    `json:"min_purchase"`
+	MaxPurchase       *int                   `json:"max_purchase"`
+	MinWeight         *float64               `json:"min_weight"`
+	MaxWeight         *float64               `json:"max_weight"`
+	MinAmount         *float64               `json:"min_amount"`
+	MaxAmount         *float64               `json:"max_amount"`
+	RequireCredit     bool                   `json:"require_credit"`
+	CreditCost        int                    `json:"credit_cost"`
+	CreditReward      int                    `json:"credit_reward"`
+	Images            string                 `json:"images"`
+	BrandID           *uint                  `json:"brand_id"`
+	ShippingTemplateID *uint                 `json:"shipping_template_id"`
+	CategoryIDs       []uint                 `json:"category_ids"`
+	CustomFields      []CustomFieldRequest   `json:"custom_fields"`
 }
 
 type UpdateProductRequest struct {
-	Name          *string                `json:"name"`
-	Description   *string                `json:"description"`
-	Price         *float64               `json:"price"`
-	Weight        *float64               `json:"weight"`
-	MinPurchase   *int                   `json:"min_purchase"`
-	MaxPurchase   *int                   `json:"max_purchase"`
-	MinWeight     *float64               `json:"min_weight"`
-	MaxWeight     *float64               `json:"max_weight"`
-	MinAmount     *float64               `json:"min_amount"`
-	MaxAmount     *float64               `json:"max_amount"`
-	RequireCredit *bool                  `json:"require_credit"`
-	CreditCost    *int                   `json:"credit_cost"`
-	CreditReward  *int                   `json:"credit_reward"`
-	Images        *string                `json:"images"`
-	IsActive      *bool                  `json:"is_active"`
-	BrandID       *uint                  `json:"brand_id"`
-	CategoryIDs   []uint                 `json:"category_ids"`
-	CustomFields  []CustomFieldRequest   `json:"custom_fields"`
+	Name              *string                `json:"name"`
+	Description       *string                `json:"description"`
+	Price             *float64               `json:"price"`
+	Weight            *float64               `json:"weight"`
+	MinPurchase       *int                   `json:"min_purchase"`
+	MaxPurchase       *int                   `json:"max_purchase"`
+	MinWeight         *float64               `json:"min_weight"`
+	MaxWeight         *float64               `json:"max_weight"`
+	MinAmount         *float64               `json:"min_amount"`
+	MaxAmount         *float64               `json:"max_amount"`
+	RequireCredit     *bool                  `json:"require_credit"`
+	CreditCost        *int                   `json:"credit_cost"`
+	CreditReward      *int                   `json:"credit_reward"`
+	Images            *string                `json:"images"`
+	IsActive          *bool                  `json:"is_active"`
+	BrandID           *uint                  `json:"brand_id"`
+	ShippingTemplateID *uint                 `json:"shipping_template_id"`
+	CategoryIDs       []uint                 `json:"category_ids"`
+	CustomFields      []CustomFieldRequest   `json:"custom_fields"`
 }
 
 type CustomFieldRequest struct {

backend/internal/schemas/shipping_template.go

@@ -0,0 +1,29 @@
+package schemas
+
+// CreateShippingTemplateRequest 创建运费模板请求
+type CreateShippingTemplateRequest struct {
+	Name           string   `json:"name" binding:"required"`
+	CalcType       string   `json:"calc_type" binding:"required,oneof=weight piece"`
+	FirstUnit      float64  `json:"first_unit" binding:"required,gt=0"`
+	FirstFee       float64  `json:"first_fee" binding:"gte=0"`
+	AdditionalUnit float64  `json:"additional_unit" binding:"required,gt=0"`
+	AdditionalFee  float64  `json:"additional_fee" binding:"gte=0"`
+	FreeAmount     float64  `json:"free_amount"`
+	Provinces      []string `json:"provinces"` // 省份列表
+	IsDefault      bool     `json:"is_default"`
+	SortOrder      int      `json:"sort_order"`
+}
+
+// UpdateShippingTemplateRequest 更新运费模板请求
+type UpdateShippingTemplateRequest struct {
+	Name           *string  `json:"name"`
+	CalcType       *string  `json:"calc_type" binding:"omitempty,oneof=weight piece"`
+	FirstUnit      *float64 `json:"first_unit" binding:"omitempty,gt=0"`
+	FirstFee       *float64 `json:"first_fee" binding:"omitempty,gte=0"`
+	AdditionalUnit *float64 `json:"additional_unit" binding:"omitempty,gt=0"`
+	AdditionalFee  *float64 `json:"additional_fee" binding:"omitempty,gte=0"`
+	FreeAmount     *float64 `json:"free_amount"`
+	Provinces      []string `json:"provinces"`
+	IsDefault      *bool    `json:"is_default"`
+	SortOrder      *int     `json:"sort_order"`
+}

frontend/index.html

@@ -2,7 +2,7 @@
 <html lang="zh-CN">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <link rel="icon" type="image/x-icon" href="/favicon.ico" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Sale</title>
   </head>

frontend/src/api/index.ts

@@ -190,4 +190,11 @@ export const adminApi = {
   getLogs: (lines?: number) => api.get('/admin/logs', { params: { lines: lines || 500 } }),
   clearLogs: () => api.delete('/admin/logs'),
   getLogInfo: () => api.get('/admin/logs/info'),
+
+  // 运费模板
+  getShippingTemplates: () => api.get('/admin/shipping-templates'),
+  getShippingTemplateById: (id: number) => api.get(`/admin/shipping-templates/${id}`),
+  createShippingTemplate: (data: any) => api.post('/admin/shipping-templates', data),
+  updateShippingTemplate: (id: number, data: any) => api.put(`/admin/shipping-templates/${id}`, data),
+  deleteShippingTemplate: (id: number) => api.delete(`/admin/shipping-templates/${id}`),
 }

frontend/src/layouts/AdminLayout.vue

@@ -69,6 +69,10 @@
           <el-icon><Notebook /></el-icon>
           <span class="nav-text">日志管理</span>
         </router-link>
+        <router-link to="/admin/shipping-templates" class="nav-link">
+          <el-icon><Box /></el-icon>
+          <span class="nav-text">运费管理</span>
+        </router-link>
         <router-link to="/admin/settings" class="nav-link">
           <el-icon><Setting /></el-icon>
           <span class="nav-text">{{ $t('admin.systemSettings') }}</span>
@@ -168,7 +172,7 @@
 import { ref, computed } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
-import { DataAnalysis, User, Folder, Grid, Stamp, Goods, List, Van, Trophy, ChatDotSquare, Setting, Document, Picture, Compass, Fold, Expand, HomeFilled, FullScreen, ArrowDown, SwitchButton, ArrowRight, Wallet, Notebook } from '@element-plus/icons-vue'
+import { DataAnalysis, User, Folder, Grid, Stamp, Goods, List, Van, Trophy, ChatDotSquare, Setting, Document, Picture, Compass, Fold, Expand, HomeFilled, FullScreen, ArrowDown, SwitchButton, ArrowRight, Wallet, Notebook, Box } from '@element-plus/icons-vue'
 import { useUserStore } from '../store/user'
 import { useCartStore } from '../store/cart'
 
@@ -197,6 +201,7 @@ const pageTitles: Record<string, string> = {
   '/admin/banners': '轮播图管理',
   '/admin/payment': '支付管理',
   '/admin/logs': '日志管理',
+  '/admin/shipping-templates': '运费管理',
   '/admin/settings': '系统设置'
 }
 

frontend/src/router/index.ts

@@ -53,6 +53,7 @@ const routes = [
       { path: 'banners', name: 'AdminBanners', component: () => import('../views/admin/Banners.vue') },
       { path: 'payment', name: 'AdminPayment', component: () => import('../views/admin/PaymentChannels.vue') },
       { path: 'logs', name: 'AdminLogs', component: () => import('../views/admin/Logs.vue') },
+      { path: 'shipping-templates', name: 'AdminShippingTemplates', component: () => import('../views/admin/ShippingTemplates.vue') },
     ],
   },
   {

frontend/src/views/admin/Products.vue

@@ -133,6 +133,15 @@
               </el-form-item>
             </el-col>
           </el-row>
+          <el-row :gutter="16">
+            <el-col :span="12">
+              <el-form-item label="运费模板">
+                <el-select v-model="form.shipping_template_id" placeholder="选择运费模板" clearable popper-class="dark-select-dropdown" style="width: 100%">
+                  <el-option v-for="t in shippingTemplates" :key="t.id" :label="t.name" :value="t.id" />
+                </el-select>
+              </el-form-item>
+            </el-col>
+          </el-row>
         </div>
         
         <div class="form-section">
@@ -171,6 +180,7 @@ import { getImageUrl } from '../../utils/image'
 const products = ref<any[]>([])
 const categories = ref<any[]>([])
 const brands = ref<any[]>([])
+const shippingTemplates = ref<any[]>([])
 const loading = ref(false)
 const saving = ref(false)
 const showAdd = ref(false)
@@ -202,7 +212,8 @@ const form = reactive({
   credit_reward: 0,
   is_active: true,
   category_ids: [] as number[],
-  brand_id: undefined as number | undefined
+  brand_id: undefined as number | undefined,
+  shipping_template_id: undefined as number | undefined
 })
 
 function getFirstImage(images: string) {
@@ -268,13 +279,18 @@ async function fetchBrands() {
   brands.value = res.data || []
 }
 
+async function fetchShippingTemplates() {
+  const res: any = await adminApi.getShippingTemplates()
+  shippingTemplates.value = res.data || []
+}
+
 function openAdd() {
   editing.value = null
   Object.assign(form, {
     name: '', description: '', price: 0, weight: 0, stock: 0,
     min_purchase: 1, max_purchase: undefined,
     require_credit: false, credit_cost: 0, credit_reward: 0,
-    is_active: true, category_ids: [], brand_id: undefined
+    is_active: true, category_ids: [], brand_id: undefined, shipping_template_id: undefined
   })
   fileList.value = []
   uploadedUrls.value = []
@@ -296,7 +312,8 @@ function editProd(row: any) {
     credit_reward: row.credit_reward || 0,
     is_active: row.is_active !== false,
     category_ids: (row.categories || []).map((c: any) => c.id),
-    brand_id: row.brand_id
+    brand_id: row.brand_id,
+    shipping_template_id: row.shipping_template_id
   })
   const images = row.images ? row.images.split(',').map((s: string) => s.trim()).filter(Boolean) : []
   uploadedUrls.value = images
@@ -350,6 +367,7 @@ onMounted(() => {
   fetchProducts()
   fetchCategories()
   fetchBrands()
+  fetchShippingTemplates()
 })
 </script>
 

frontend/src/views/admin/ShippingTemplates.vue

@@ -0,0 +1,337 @@
+<template>
+  <div class="shipping-templates-page">
+    <div class="page-header">
+      <el-button type="primary" @click="openAdd">创建运费模板</el-button>
+    </div>
+    <div class="table-card">
+      <el-table :data="templates" v-loading="loading">
+        <el-table-column prop="id" label="ID" width="80" />
+        <el-table-column prop="name" label="模板名称" min-width="150" />
+        <el-table-column label="计费方式" width="100">
+          <template #default="{ row }">
+            <el-tag :type="row.calc_type === 'weight' ? 'primary' : 'success'" size="small">
+              {{ row.calc_type === 'weight' ? '按重量' : '按件数' }}
+            </el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column label="首重/首件" width="120">
+          <template #default="{ row }">
+            {{ row.first_unit }}{{ row.calc_type === 'weight' ? '克' : '件' }}
+          </template>
+        </el-table-column>
+        <el-table-column label="首费" width="100">
+          <template #default="{ row }">¥{{ row.first_fee }}</template>
+        </el-table-column>
+        <el-table-column label="续重/续件" width="120">
+          <template #default="{ row }">
+            {{ row.additional_unit }}{{ row.calc_type === 'weight' ? '克' : '件' }}
+          </template>
+        </el-table-column>
+        <el-table-column label="续费" width="100">
+          <template #default="{ row }">¥{{ row.additional_fee }}</template>
+        </el-table-column>
+        <el-table-column label="包邮金额" width="100">
+          <template #default="{ row }">
+            {{ row.free_amount > 0 ? '¥' + row.free_amount : '不包邮' }}
+          </template>
+        </el-table-column>
+        <el-table-column label="适用地区" min-width="150">
+          <template #default="{ row }">
+            <span v-if="!row.provinces_list || row.provinces_list.length === 0">全国</span>
+            <el-tag v-else v-for="p in row.provinces_list.slice(0, 3)" :key="p" size="small" style="margin-right: 4px;">{{ p }}</el-tag>
+            <span v-if="row.provinces_list && row.provinces_list.length > 3">...</span>
+          </template>
+        </el-table-column>
+        <el-table-column label="默认" width="80">
+          <template #default="{ row }">
+            <el-tag v-if="row.is_default" type="warning" size="small">默认</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column label="操作" width="120" fixed="right">
+          <template #default="{ row }">
+            <el-button link type="primary" size="small" @click="editTemplate(row)">编辑</el-button>
+            <el-button link type="danger" size="small" @click="deleteTemplate(row.id)">删除</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+    </div>
+
+    <el-dialog v-model="showAdd" :title="editing ? '编辑运费模板' : '创建运费模板'" width="600px">
+      <el-form :model="form" label-width="100px">
+        <el-form-item label="模板名称" required>
+          <el-input v-model="form.name" placeholder="如：江浙沪包邮、偏远地区" />
+        </el-form-item>
+        <el-form-item label="计费方式" required>
+          <el-radio-group v-model="form.calc_type">
+            <el-radio value="weight">按重量</el-radio>
+            <el-radio value="piece">按件数</el-radio>
+          </el-radio-group>
+        </el-form-item>
+        <el-row :gutter="16">
+          <el-col :span="12">
+            <el-form-item label="首重/首件" required>
+              <el-input-number v-model="form.first_unit" :min="0.01" :precision="2" style="width: 100%" />
+            </el-form-item>
+          </el-col>
+          <el-col :span="12">
+            <el-form-item label="首费(元)" required>
+              <el-input-number v-model="form.first_fee" :min="0" :precision="2" style="width: 100%" />
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-row :gutter="16">
+          <el-col :span="12">
+            <el-form-item label="续重/续件" required>
+              <el-input-number v-model="form.additional_unit" :min="0.01" :precision="2" style="width: 100%" />
+            </el-form-item>
+          </el-col>
+          <el-col :span="12">
+            <el-form-item label="续费(元)" required>
+              <el-input-number v-model="form.additional_fee" :min="0" :precision="2" style="width: 100%" />
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-form-item label="包邮金额">
+          <el-input-number v-model="form.free_amount" :min="0" :precision="2" style="width: 200px" />
+          <span class="form-tip" style="margin-left: 8px; color: rgba(255,255,255,0.5);">0表示不包邮</span>
+        </el-form-item>
+        <el-form-item label="适用地区">
+          <el-select
+            v-model="form.provinces"
+            multiple
+            filterable
+            placeholder="留空表示全国"
+            popper-class="dark-select-dropdown"
+            style="width: 100%"
+          >
+            <el-option v-for="p in chinaProvinces" :key="p" :label="p" :value="p" />
+          </el-select>
+        </el-form-item>
+        <el-row :gutter="16">
+          <el-col :span="12">
+            <el-form-item label="设为默认">
+              <el-switch v-model="form.is_default" />
+            </el-form-item>
+          </el-col>
+          <el-col :span="12">
+            <el-form-item label="排序">
+              <el-input-number v-model="form.sort_order" :min="0" style="width: 100%" />
+            </el-form-item>
+          </el-col>
+        </el-row>
+      </el-form>
+      <template #footer>
+        <el-button @click="showAdd = false">取消</el-button>
+        <el-button type="primary" @click="saveTemplate" :loading="saving">保存</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, reactive, onMounted } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { adminApi } from '../../api'
+
+const templates = ref<any[]>([])
+const loading = ref(false)
+const saving = ref(false)
+const showAdd = ref(false)
+const editing = ref<any>(null)
+
+// 中国省份列表
+const chinaProvinces = [
+  '北京市', '天津市', '上海市', '重庆市',
+  '河北省', '山西省', '辽宁省', '吉林省', '黑龙江省',
+  '江苏省', '浙江省', '安徽省', '福建省', '江西省', '山东省',
+  '河南省', '湖北省', '湖南省', '广东省', '海南省',
+  '四川省', '贵州省', '云南省', '陕西省', '甘肃省', '青海省',
+  '台湾省', '内蒙古自治区', '广西壮族自治区', '西藏自治区',
+  '宁夏回族自治区', '新疆维吾尔自治区', '香港特别行政区', '澳门特别行政区'
+]
+
+const form = reactive({
+  name: '',
+  calc_type: 'weight',
+  first_unit: 500,
+  first_fee: 10,
+  additional_unit: 100,
+  additional_fee: 2,
+  free_amount: 0,
+  provinces: [] as string[],
+  is_default: false,
+  sort_order: 0
+})
+
+async function fetchTemplates() {
+  loading.value = true
+  try {
+    const res: any = await adminApi.getShippingTemplates()
+    templates.value = res.data || []
+  } finally {
+    loading.value = false
+  }
+}
+
+function openAdd() {
+  editing.value = null
+  Object.assign(form, {
+    name: '',
+    calc_type: 'weight',
+    first_unit: 500,
+    first_fee: 10,
+    additional_unit: 100,
+    additional_fee: 2,
+    free_amount: 0,
+    provinces: [],
+    is_default: false,
+    sort_order: 0
+  })
+  showAdd.value = true
+}
+
+function editTemplate(row: any) {
+  editing.value = row
+  Object.assign(form, {
+    name: row.name,
+    calc_type: row.calc_type,
+    first_unit: row.first_unit,
+    first_fee: row.first_fee,
+    additional_unit: row.additional_unit,
+    additional_fee: row.additional_fee,
+    free_amount: row.free_amount || 0,
+    provinces: row.provinces_list || [],
+    is_default: row.is_default,
+    sort_order: row.sort_order || 0
+  })
+  showAdd.value = true
+}
+
+async function saveTemplate() {
+  if (!form.name) {
+    ElMessage.warning('请输入模板名称')
+    return
+  }
+  saving.value = true
+  try {
+    const submitData = { ...form }
+    if (editing.value) {
+      await adminApi.updateShippingTemplate(editing.value.id, submitData)
+    } else {
+      await adminApi.createShippingTemplate(submitData)
+    }
+    ElMessage.success('保存成功')
+    showAdd.value = false
+    editing.value = null
+    await fetchTemplates()
+  } catch (error: any) {
+    const msg = error.response?.data?.error || '保存失败'
+    ElMessage.error(msg)
+  } finally {
+    saving.value = false
+  }
+}
+
+async function deleteTemplate(id: number) {
+  await ElMessageBox.confirm('确定删除此运费模板？', '确认删除')
+  try {
+    await adminApi.deleteShippingTemplate(id)
+    ElMessage.success('删除成功')
+    await fetchTemplates()
+  } catch (error: any) {
+    const msg = error.response?.data?.error || '删除失败'
+    ElMessage.error(msg)
+  }
+}
+
+onMounted(fetchTemplates)
+</script>
+
+<style scoped lang="scss">
+.shipping-templates-page { padding: 0; }
+.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
+.table-card { background: #2d2d44; border: 1px solid rgba(255, 255, 255, 0.06); border-radius: 12px; padding: 20px; }
+
+:deep(.el-form-item__label) {
+  color: rgba(255, 255, 255, 0.7);
+}
+
+:deep(.el-input__wrapper),
+:deep(.el-textarea__inner) {
+  background: rgba(255, 255, 255, 0.06);
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  box-shadow: none;
+  
+  &:hover, &:focus {
+    border-color: #4e6ef2;
+  }
+}
+
+:deep(.el-input__inner),
+:deep(.el-textarea__inner) {
+  color: #fff;
+  
+  &::placeholder {
+    color: rgba(255, 255, 255, 0.3);
+  }
+}
+
+:deep(.el-select .el-input__wrapper) {
+  background: rgba(255, 255, 255, 0.06);
+}
+
+:deep(.el-input-number) {
+  width: 100%;
+}
+
+:deep(.el-input-number .el-input__wrapper) {
+  background: rgba(255, 255, 255, 0.06);
+  border: 1px solid rgba(255, 255, 255, 0.08);
+}
+
+:deep(.el-radio-button__inner) {
+  background: rgba(255, 255, 255, 0.06);
+  border-color: rgba(255, 255, 255, 0.08);
+  color: rgba(255, 255, 255, 0.7);
+}
+
+:deep(.el-radio-button__original-radio:checked + .el-radio-button__inner) {
+  background: #4e6ef2;
+  border-color: #4e6ef2;
+  color: #fff;
+}
+
+:deep(.el-dialog) {
+  background: #2d2d44;
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  border-radius: 12px;
+}
+
+:deep(.el-dialog__header) {
+  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
+  padding: 16px 20px;
+  margin: 0;
+}
+
+:deep(.el-dialog__title) {
+  color: #fff;
+  font-weight: 600;
+}
+
+:deep(.el-dialog__headerbtn .el-dialog__close) {
+  color: rgba(255, 255, 255, 0.5);
+  
+  &:hover {
+    color: #fff;
+  }
+}
+
+:deep(.el-dialog__footer) {
+  border-top: 1px solid rgba(255, 255, 255, 0.06);
+  padding: 16px 20px;
+}
+
+:deep(.el-radio) {
+  color: rgba(255, 255, 255, 0.7);
+}
+</style>