🎉 feat: update app logic and database schema for improved performance

app.py

@@ -288,6 +288,7 @@ def login():
         password = request.form.get('password')
         
         user = User.query.filter_by(username=username).first()
+        
         if user and user.check_password(password):
             login_user(user)
             # Aktualisiere letzten Login-Zeitpunkt
@@ -296,6 +297,7 @@ def login():
             
             next_page = request.args.get('next')
             return redirect(next_page or url_for('index'))
+        
         flash('Ungültiger Benutzername oder Passwort')
     return render_template('login.html')