fix(poll): GetPackages 接口新增分页 POLL-03

- 新增 AssetPackagesResult DTO（含 total/page/page_size/items 字段）
- GetPackages 签名新增 page/pageSize 参数，默认 page=1、pageSize=50、最大 100
- admin/asset.go:Packages 从 Query 参数读取 page/page_size 传入 Service
- client_asset.go 调用处同步更新，使用默认分页参数

internal/handler/admin/asset.go

@@ -90,7 +90,7 @@ func (h *AssetHandler) Refresh(c *fiber.Ctx) error {
 	return response.Success(c, result)
 }
 
-// Packages 获取资产所有套餐列表
+// Packages 获取资产所有套餐列表（支持分页，默认 page=1 pageSize=50）
 // GET /api/admin/assets/:asset_type/:id/packages
 func (h *AssetHandler) Packages(c *fiber.Ctx) error {
 	assetType := c.Params("asset_type")
@@ -99,7 +99,10 @@ func (h *AssetHandler) Packages(c *fiber.Ctx) error {
 		return errors.New(errors.CodeInvalidParam, "无效的资产ID")
 	}
 
-	result, err := h.assetService.GetPackages(c.UserContext(), assetType, uint(id))
+	page := c.QueryInt("page", 1)
+	pageSize := c.QueryInt("page_size", 50)
+
+	result, err := h.assetService.GetPackages(c.UserContext(), assetType, uint(id), page, pageSize)
 	if err != nil {
 		return err
 	}

internal/handler/app/client_asset.go

@@ -210,11 +210,11 @@ func (h *ClientAssetHandler) GetAvailablePackages(c *fiber.Ctx) error {
 		return errors.New(errors.CodeNoAvailablePackage, "当前无可购买套餐")
 	}
 
-	allUsages, err := h.assetService.GetPackages(resolved.SkipPermissionCtx, resolved.Asset.AssetType, resolved.Asset.AssetID)
+	packagesResult, err := h.assetService.GetPackages(resolved.SkipPermissionCtx, resolved.Asset.AssetType, resolved.Asset.AssetID, 1, 50)
 	if err != nil {
 		return err
 	}
-	resolved.MainPackageActived = hasActiveMainPackage(allUsages)
+	resolved.MainPackageActived = hasActiveMainPackage(packagesResult.Items)
 
 	listCtx := resolved.SkipPermissionCtx
 	if resolved.IsAgentChannel {

internal/model/dto/asset_dto.go

@@ -97,6 +97,14 @@ type AssetPackageResponse struct {
 	CreatedAt       time.Time  `json:"created_at" description:"创建时间"`
 }
 
+// AssetPackagesResult 套餐列表分页结果
+type AssetPackagesResult struct {
+	Total    int64                   `json:"total" description:"总条数"`
+	Page     int                     `json:"page" description:"当前页码"`
+	PageSize int                     `json:"page_size" description:"每页条数"`
+	Items    []*AssetPackageResponse `json:"items" description:"套餐列表"`
+}
+
 // AssetResolveRequest 资产解析请求（路径参数）
 type AssetResolveRequest struct {
 	Identifier string `path:"identifier" description:"资产标识符（虚拟号/ICCID/IMEI/SN/MSISDN）" required:"true"`

internal/service/asset/service.go

@@ -343,8 +343,20 @@ func (s *Service) Refresh(ctx context.Context, assetType string, id uint) (*dto.
 	}
 }
 
-// GetPackages 获取资产的所有套餐列表
+// GetPackages 获取资产的所有套餐列表（支持分页）
-func (s *Service) GetPackages(ctx context.Context, assetType string, id uint) ([]*dto.AssetPackageResponse, error) {
+// page 默认 1，pageSize 默认 50，pageSize 最大 100
+func (s *Service) GetPackages(ctx context.Context, assetType string, id uint, page, pageSize int) (*dto.AssetPackagesResult, error) {
+	// 分页参数边界处理
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 {
+		pageSize = 50
+	}
+	if pageSize > 100 {
+		pageSize = 100
+	}
+
 	// assetType 对应 Store 中的 carrierType：card→iot_card, device→device
 	carrierType := assetType
 	if assetType == "card" {
@@ -371,7 +383,7 @@ func (s *Service) GetPackages(ctx context.Context, assetType string, id uint) ([
 		pkgMap[p.ID] = p
 	}
 
-	result := make([]*dto.AssetPackageResponse, 0, len(usages))
+	all := make([]*dto.AssetPackageResponse, 0, len(usages))
 	for _, u := range usages {
 		pkg := pkgMap[u.PackageID]
 		ratio := 1.0
@@ -403,15 +415,31 @@ func (s *Service) GetPackages(ctx context.Context, assetType string, id uint) ([
 			Priority:        u.Priority,
 			CreatedAt:       u.CreatedAt,
 		}
-		result = append(result, item)
+		all = append(all, item)
 	}
 
 	// 按 created_at DESC 排序
-	sort.Slice(result, func(i, j int) bool {
+	sort.Slice(all, func(i, j int) bool {
-		return result[i].CreatedAt.After(result[j].CreatedAt)
+		return all[i].CreatedAt.After(all[j].CreatedAt)
 	})
 
-	return result, nil
+	total := int64(len(all))
+	offset := (page - 1) * pageSize
+	end := offset + pageSize
+	if offset >= len(all) {
+		offset = len(all)
+	}
+	if end > len(all) {
+		end = len(all)
+	}
+	items := all[offset:end]
+
+	return &dto.AssetPackagesResult{
+		Total:    total,
+		Page:     page,
+		PageSize: pageSize,
+		Items:    items,
+	}, nil
 }
 
 // GetCurrentPackage 获取资产当前生效的主套餐