feat: 完善平台总后台模块

backend/api/internal/models/ec_product.go

@@ -0,0 +1,16 @@
+package models
+
+import "git.apinb.com/bsm-sdk/core/database"
+
+// EcProduct 对应 ec_product，保存可燃气体商品与服务。
+type EcProduct struct {
+	Entity
+	EcCategoryID  uint64 `gorm:"column:ec_category_id;not null;index" json:"ec_category_id"`
+	ProductCode   string `gorm:"column:product_code;type:varchar(64);not null;uniqueIndex" json:"product_code"`
+	Name          string `gorm:"column:name;type:varchar(128);not null" json:"name"`
+	PriceAmount   int64  `gorm:"column:price_amount;not null;default:0" json:"price_amount"`
+	StockQuantity int    `gorm:"column:stock_quantity;not null;default:0" json:"stock_quantity"`
+}
+
+func init()                                { database.AppendMigrate(&EcProduct{}) }
+func (table *EcProduct) TableName() string { return "ec_product" }