feat: 通用授权后台、离线证、Waffo 支付页与仪表盘加强

支持多产品计划展示、LICOFF 离线签发、支付独立配置与调试，以及分析看板；同步更新 README 与集成文档。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/service/plan/plan_service.go

@@ -46,7 +46,7 @@ func (s *PlanService) List(page, pageSize int, productID uint) ([]dto.PlanRespon
 // GetByProduct 查询某产品的上架计划（公开接口） // Logan.Li
 func (s *PlanService) GetByProduct(productID uint) ([]dto.PlanResponse, error) {
 	var plans []model.Plan
-	if err := s.db.Where("product_id = ? AND status = ?", productID, 1).
+	if err := s.db.Preload("Product").Where("product_id = ? AND status = ?", productID, 1).
 		Order("sort_order ASC").Find(&plans).Error; err != nil {
 		return nil, errors.New("获取定价计划失败")
 	}
@@ -88,6 +88,7 @@ func (s *PlanService) Create(req dto.PlanCreate) (*dto.PlanResponse, error) {
 	if err := s.db.Create(&plan).Error; err != nil {
 		return nil, errors.New("创建定价计划失败")
 	}
+	plan.Product = product
 	resp := toPlanResponse(plan)
 	return &resp, nil
 }
@@ -95,7 +96,7 @@ func (s *PlanService) Create(req dto.PlanCreate) (*dto.PlanResponse, error) {
 // Update 更新定价计划 // Logan.Li
 func (s *PlanService) Update(id uint, req dto.PlanUpdate) (*dto.PlanResponse, error) {
 	var plan model.Plan
-	if err := s.db.First(&plan, id).Error; err != nil {
+	if err := s.db.Preload("Product").First(&plan, id).Error; err != nil {
 		return nil, errors.New("定价计划不存在")
 	}
 
@@ -128,7 +129,7 @@ func (s *PlanService) Update(id uint, req dto.PlanUpdate) (*dto.PlanResponse, er
 	if err := s.db.Model(&plan).Updates(updates).Error; err != nil {
 		return nil, errors.New("更新定价计划失败")
 	}
-	s.db.First(&plan, id)
+	s.db.Preload("Product").First(&plan, id)
 	resp := toPlanResponse(plan)
 	return &resp, nil
 }
@@ -146,16 +147,17 @@ func (s *PlanService) ToggleStatus(id uint, status int) error {
 // toPlanResponse 模型转响应 DTO // Logan.Li
 func toPlanResponse(p model.Plan) dto.PlanResponse {
 	return dto.PlanResponse{
-		ID:         p.ID,
-		ProductID:  p.ProductID,
-		Name:       p.Name,
-		PlanType:   p.PlanType,
-		Price:      p.Price,
-		Currency:   p.Currency,
-		Duration:   p.Duration,
-		MaxDevices: p.MaxDevices,
-		Features:   utils.ParseFeatures(p.Features),
-		SortOrder:  p.SortOrder,
-		Status:     p.Status,
+		ID:          p.ID,
+		ProductID:   p.ProductID,
+		ProductName: p.Product.Name,
+		Name:        p.Name,
+		PlanType:    p.PlanType,
+		Price:       p.Price,
+		Currency:    p.Currency,
+		Duration:    p.Duration,
+		MaxDevices:  p.MaxDevices,
+		Features:    utils.ParseFeatures(p.Features),
+		SortOrder:   p.SortOrder,
+		Status:      p.Status,
 	}
 }