feat: extend equipment and workout models with service tracking

internal/stats/service.go

@@ -0,0 +1,33 @@
+package stats
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService() *Service {
+	return &Service{
+		repo: NewRepository(),
+	}
+}
+
+func (s *Service) GetSummary(userID uint) (*Summary, error) {
+	return s.repo.GetSummary(userID)
+}
+
+func (s *Service) GetWeeklyStats(userID uint, weeks int) ([]PeriodStats, error) {
+	if weeks <= 0 || weeks > 52 {
+		weeks = 12
+	}
+	return s.repo.GetWeeklyStats(userID, weeks)
+}
+
+func (s *Service) GetMonthlyStats(userID uint, months int) ([]PeriodStats, error) {
+	if months <= 0 || months > 24 {
+		months = 12
+	}
+	return s.repo.GetMonthlyStats(userID, months)
+}
+
+func (s *Service) GetPersonalBests(userID uint) ([]PersonalBest, error) {
+	return s.repo.GetPersonalBests(userID)
+}