Add route to serve user avatar files to fix avatar display issue

vidai/web.py

@@ -1109,6 +1109,12 @@ def delete_avatar():
     return redirect(url_for('account'))
 
 
+@app.route('/static/avatars/<filename>')
+def serve_avatar(filename):
+    """Serve user avatar files."""
+    return send_from_directory(avatars_dir, filename)
+
+
 @app.route('/account/change_password', methods=['POST'])
 @login_required
 def change_password():