perf(platform): 创作页加载 - 合并用户数据与余额请求并按路由延迟加载

backend/internal/handler/user_data.go

@@ -299,6 +299,19 @@ func RegisterUserDataRoutes(r *gin.RouterGroup, svc *service.Service) {
 		}
 		ok(c, gin.H{"assets": assets})
 	})
+	r.GET("/user-data/snapshot", func(c *gin.Context) {
+		user, err := currentUser(c, svc)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		snapshot, err := svc.UserDataSnapshot(user.ID)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		ok(c, snapshot)
+	})
 	r.GET("/assets/:id", func(c *gin.Context) {
 		user, err := currentUser(c, svc)
 		if err != nil {

backend/internal/service/user_data.go

@@ -29,6 +29,23 @@ type UserDataSummary struct {
 	UpdatedAt time.Time `json:"updatedAt"`
 }
 
+type UserDataSnapshot struct {
+	Assets   []json.RawMessage `json:"assets"`
+	Projects []json.RawMessage `json:"projects"`
+}
+
+func (s *Service) UserDataSnapshot(userID string) (UserDataSnapshot, error) {
+	assets, err := s.UserAssets(userID)
+	if err != nil {
+		return UserDataSnapshot{}, err
+	}
+	projects, err := s.UserCanvasProjects(userID)
+	if err != nil {
+		return UserDataSnapshot{}, err
+	}
+	return UserDataSnapshot{Assets: assets, Projects: projects}, nil
+}
+
 func (s *Service) UserAssetSummaries(userID string) ([]UserDataSummary, error) {
 	assets, err := s.repo.AssetSummaries(userID)
 	if err != nil {