diff --git a/routes/utils.py b/routes/utils.py
index effaea9..fe48b30 100644
--- a/routes/utils.py
+++ b/routes/utils.py
@@ -9,9 +9,8 @@ import logging
 import threading
 import time
 from flask import Blueprint, request, jsonify, current_app
+from services import helpers
 from services.helpers import (
-    lessons,
-    DATA_PATH,
     repair_json,
     load_lessons,
     create_sample_lessons
@@ -37,19 +36,19 @@ def debug():
     json_content = "Datei nicht gefunden"
     json_error = None
     try:
-        if os.path.exists(DATA_PATH):
-            with open(DATA_PATH, "r", encoding="utf-8") as f:
+        if os.path.exists(helpers.DATA_PATH):
+            with open(helpers.DATA_PATH, "r", encoding="utf-8") as f:
                 json_content = f.read()
     except Exception as e:
         json_content = f"Fehler beim Lesen der Datei: {e}"
         json_error = str(e)
 
     debug_info = {
-        'lessons_loaded': len(lessons),
-        'lessons_sample': lessons[:3] if lessons else [],  # Nur erste 3 anzeigen
-        'data_path': DATA_PATH,
-        'file_exists': os.path.exists(DATA_PATH),
-        'file_size': os.path.getsize(DATA_PATH) if os.path.exists(DATA_PATH) else 0,
+        'lessons_loaded': len(helpers.lessons),
+        'lessons_sample': helpers.lessons[:3] if helpers.lessons else [],  # Nur erste 3 anzeigen
+        'data_path': helpers.DATA_PATH,
+        'file_exists': os.path.exists(helpers.DATA_PATH),
+        'file_size': os.path.getsize(helpers.DATA_PATH) if os.path.exists(helpers.DATA_PATH) else 0,
         'file_content_preview': json_content[:500] + '...' if len(json_content) > 500 else json_content,
         'json_error': json_error,
         'current_progress': {
@@ -69,8 +68,8 @@ def debug():
 def repair_json_endpoint():
     """Endpoint zum manuellen Reparieren der JSON-Datei"""
     try:
-        if os.path.exists(DATA_PATH):
-            with open(DATA_PATH, "r", encoding="utf-8") as f:
+        if os.path.exists(helpers.DATA_PATH):
+            with open(helpers.DATA_PATH, "r", encoding="utf-8") as f:
                 content = f.read()
 
             repaired_content = repair_json(content)
@@ -80,12 +79,12 @@ def repair_json_endpoint():
                 json.loads(repaired_content)
 
                 # Backup der originalen Datei erstellen
-                backup_path = DATA_PATH + ".backup"
+                backup_path = helpers.DATA_PATH + ".backup"
                 with open(backup_path, "w", encoding="utf-8") as f:
                     f.write(content)
 
                 # Reparierte Version speichern
-                with open(DATA_PATH, "w", encoding="utf-8") as f:
+                with open(helpers.DATA_PATH, "w", encoding="utf-8") as f:
                     f.write(repaired_content)
 
                 # Lektionen neu laden
@@ -94,7 +93,7 @@ def repair_json_endpoint():
                 return jsonify({
                     'status': 'success',
                     'message': f'JSON erfolgreich repariert. Backup erstellt: {backup_path}',
-                    'lessons_loaded': len(lessons)
+                    'lessons_loaded': len(helpers.lessons)
                 })
 
             except json.JSONDecodeError as e:
@@ -135,7 +134,6 @@ def recreate_lessons():
 @utils_bp.route('/shutdown', methods=['POST'])
 def shutdown():
     """Beendet den Flask-Server (nur für lokale Desktop-Nutzung)"""
-    from flask_wtf.csrf import csrf
     try:
         logger.info("Server-Shutdown angefordert")
 
diff --git a/services/training_service.py b/services/training_service.py
index 9b9d131..6495a23 100644
--- a/services/training_service.py
+++ b/services/training_service.py
@@ -141,21 +141,11 @@ class TrainingService:
         if lesson_completed:
             logger.info(f"Lektion {lesson_index} abgeschlossen!")
 
-            # Calculate final statistics
-            stats = self.statistics_service.calculate_typing_statistics(
-                user_input, current_text, elapsed_time
-            )
+            # Hinweis: Das Speichern der Statistik übernimmt das Frontend über
+            # den dedizierten Endpoint /save_lesson_statistics. Hier wird NICHT
+            # zusätzlich gespeichert, um doppelte Statistik-Einträge zu vermeiden.
 
-            # Save statistics
-            self.statistics_service.save_lesson_statistics(
-                lesson_index=lesson_index,
-                chars_per_minute=stats['typing_speed'],
-                error_rate=stats['error_rate'],
-                wpm=stats['words_per_minute'],
-                training_duration=total_elapsed_time / 1000.0
-            )
-
-            # Reset lesson progress
+            # Lektions-Fortschritt zurücksetzen
             self.progress_service.complete_lesson(lesson_index)
 
         # Update session