message: only regular header shadow
diff: @@ -44,6 +44,7 @@ const PanelHeader = ({
  const platform = usePlatform();
  const { webviewType } = useContext(ConfigProviderContext);
  const panelContext = useContext(PanelContext);
  + const needShadow = shadow && sizeX === 'regular';
  let needSeparator = separator;
  if (typeof separator !== 'boolean') {
  @@ -60,7 +61,7 @@ const PanelHeader = ({
  getClassname('PanelHeader', platform),
  {
  'PanelHeader--trnsp': transparent,
  - 'PanelHeader--shadow': shadow,
  + 'PanelHeader--shadow': needShadow,
  'PanelHeader--vis': visor,
  'PanelHeader--sep': needSeparator && visor,
  'PanelHeader--vkapps': webviewType === WebviewType.VKAPPS,
  @@ -78,7 +79,7 @@ const PanelHeader = ({
  classNames(
  'PanelHeader__fixed',
  {
  - 'PanelHeader__fixed--shadow': shadow,
  + 'PanelHeader__fixed--shadow': needShadow,
  },
  )
  }
  