modified: serv_nginx/api_bb/internal/handlers/handlers.go

new file:   serv_nginx/api_bb/internal/handlers/user_workout_handler.go
	modified:   serv_nginx/api_bb/internal/models/workout.go
	modified:   serv_nginx/api_bb/internal/repository/workout_repository.go
	modified:   serv_nginx/api_bb/internal/routes/routes.go
	new file:   serv_nginx/api_bb/internal/service/user_workout_service.go
	new file:   serv_nginx/api_bb/pkg/utils/response.go
	new file:   serv_nginx/api_bb/pkg/utils/validation.go
add workout EndPoints for workout struct, CRUD operations and logics

serv_nginx/api_bb/pkg/utils/response.go

@@ -0,0 +1,20 @@
+// pkg/utils/response.go (дополнение)
+package utils
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// RespondWithValidationError отправляет ответ с ошибками валидации
+func RespondWithValidationError(w http.ResponseWriter, validationError error) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusBadRequest)
+
+	response := map[string]interface{}{
+		"error":   "Validation failed",
+		"details": GetValidationErrors(validationError),
+	}
+
+	json.NewEncoder(w).Encode(response)
+}