Fix timezone display: Convert UTC to local time in players list

app/app.py

@@ -52,6 +52,7 @@ def create_app(config_name=None):
     register_error_handlers(app)
     register_commands(app)
     register_context_processors(app)
+    register_template_filters(app)
     
     return app
 
@@ -181,6 +182,34 @@ def register_context_processors(app):
         return {'theme': theme}
 
 
+def register_template_filters(app):
+    """Register custom Jinja2 template filters"""
+    from datetime import datetime, timezone
+    
+    @app.template_filter('localtime')
+    def localtime_filter(dt, format='%Y-%m-%d %H:%M'):
+        """Convert UTC datetime to local time and format it.
+        
+        Args:
+            dt: datetime object in UTC
+            format: strftime format string
+            
+        Returns:
+            Formatted datetime string in local timezone
+        """
+        if dt is None:
+            return ''
+        
+        # If datetime is naive (no timezone), assume it's UTC
+        if dt.tzinfo is None:
+            dt = dt.replace(tzinfo=timezone.utc)
+        
+        # Convert to local time
+        local_dt = dt.astimezone()
+        
+        return local_dt.strftime(format)
+
+
 # For backwards compatibility and direct running
 if __name__ == '__main__':
     app = create_app()