feat: 实现客户端核心业务接口（client-core-business-api）

新增客户端资产、钱包、订单、实名、设备管理等核心业务 Handler 与 DTO：
- 客户端资产信息查询、套餐列表、套餐历史、资产刷新
- 客户端钱包详情、流水、充值校验、充值订单、充值记录
- 客户端订单创建、列表、详情
- 客户端实名认证链接获取
- 客户端设备卡列表、重启、恢复出厂、WiFi配置、切卡
- 客户端订单服务（含微信/支付宝支付流程）
- 强充自动代购异步任务处理
- 数据库迁移 000084：充值记录增加自动代购状态字段

internal/model/dto/client_asset_dto.go

@@ -0,0 +1,86 @@
+package dto
+
+// ========================================
+// B1 资产信息
+// ========================================
+
+// AssetInfoRequest B1 资产信息请求
+type AssetInfoRequest struct {
+	Identifier string `json:"identifier" query:"identifier" validate:"required,min=1,max=50" required:"true" minLength:"1" maxLength:"50" description:"资产标识符（SN/IMEI/虚拟号/ICCID/MSISDN）"`
+}
+
+// AssetInfoResponse B1 资产信息响应
+type AssetInfoResponse struct {
+	AssetType      string `json:"asset_type" description:"资产类型 (card:卡, device:设备)"`
+	AssetID        uint   `json:"asset_id" description:"资产ID"`
+	Identifier     string `json:"identifier" description:"资产标识符"`
+	VirtualNo      string `json:"virtual_no" description:"虚拟号"`
+	Status         int    `json:"status" description:"状态 (0:禁用, 1:启用)"`
+	RealNameStatus int    `json:"real_name_status" description:"实名状态 (0:未实名, 1:已实名)"`
+	CarrierName    string `json:"carrier_name" description:"运营商名称"`
+	Generation     string `json:"generation" description:"制式"`
+	WalletBalance  int64  `json:"wallet_balance" description:"钱包余额（分）"`
+}
+
+// ========================================
+// B2 资产可购套餐列表
+// ========================================
+
+// AssetPackageListRequest B2 资产可购套餐列表请求
+type AssetPackageListRequest struct {
+	Identifier string `json:"identifier" query:"identifier" validate:"required,min=1,max=50" required:"true" minLength:"1" maxLength:"50" description:"资产标识符（SN/IMEI/虚拟号/ICCID/MSISDN）"`
+}
+
+// ClientPackageItem B2 客户端套餐项
+type ClientPackageItem struct {
+	PackageID     uint   `json:"package_id" description:"套餐ID"`
+	PackageName   string `json:"package_name" description:"套餐名称"`
+	PackageType   string `json:"package_type" description:"套餐类型 (formal:正式套餐, addon:加油包)"`
+	RetailPrice   int64  `json:"retail_price" description:"零售价（分）"`
+	CostPrice     int64  `json:"cost_price" description:"成本价（分）"`
+	ValidityDays  int    `json:"validity_days" description:"有效天数"`
+	IsAddon       bool   `json:"is_addon" description:"是否加油包"`
+	DataAllowance int64  `json:"data_allowance" description:"流量额度"`
+	DataUnit      string `json:"data_unit" description:"流量单位"`
+	Description   string `json:"description" description:"套餐说明"`
+}
+
+// AssetPackageListResponse B2 资产可购套餐列表响应
+type AssetPackageListResponse struct {
+	Packages []ClientPackageItem `json:"packages" description:"套餐列表"`
+}
+
+// ========================================
+// B3 资产套餐历史
+// ========================================
+
+// AssetPackageHistoryRequest B3 资产套餐历史请求
+type AssetPackageHistoryRequest struct {
+	Identifier string `json:"identifier" query:"identifier" validate:"required,min=1,max=50" required:"true" minLength:"1" maxLength:"50" description:"资产标识符（SN/IMEI/虚拟号/ICCID/MSISDN）"`
+	Page       int    `json:"page" query:"page" validate:"required,min=1" required:"true" minimum:"1" description:"页码"`
+	PageSize   int    `json:"page_size" query:"page_size" validate:"required,min=1,max=100" required:"true" minimum:"1" maximum:"100" description:"每页数量"`
+}
+
+// AssetPackageHistoryResponse B3 资产套餐历史响应
+type AssetPackageHistoryResponse struct {
+	List     []AssetPackageResponse `json:"list" description:"套餐历史列表"`
+	Total    int64                  `json:"total" description:"总数"`
+	Page     int                    `json:"page" description:"页码"`
+	PageSize int                    `json:"page_size" description:"每页数量"`
+}
+
+// ========================================
+// B4 资产刷新
+// ========================================
+
+// AssetRefreshRequest B4 资产刷新请求
+type AssetRefreshRequest struct {
+	Identifier string `json:"identifier" validate:"required,min=1,max=50" required:"true" minLength:"1" maxLength:"50" description:"资产标识符（SN/IMEI/虚拟号/ICCID/MSISDN）"`
+}
+
+// AssetRefreshResponse B4 资产刷新响应
+type AssetRefreshResponse struct {
+	RefreshType     string `json:"refresh_type" description:"刷新类型 (card:卡, device:设备)"`
+	Accepted        bool   `json:"accepted" description:"是否已受理"`
+	CooldownSeconds int    `json:"cooldown_seconds" description:"冷却秒数"`
+}