Visual fixes on paohvis

fix hover, icons, and background rectangles

libs/shared/lib/vis/visualizations/paohvis/paohvis.tsx

@@ -113,7 +113,7 @@ export const PaohVis = ({ data, graphMetadata, schema, settings, updateSettings
   const [widthTotalRowInformation, setWidthTotalRowInformation] = useState<number>(0);
   const [widthTotalColumnInformation, setWidthTotalColumnInformation] = useState<number>(0);
 
-  const classTopTextColumns = 'text-secondary-800 mx-1 overflow-hidden whitespace-nowrap text-ellipsis';
+  const classTopTextColumns = 'font-mono text-secondary-800 mx-1 overflow-hidden whitespace-nowrap text-ellipsis';
 
   const configStyle: { [key: string]: string } = {
     colorText: 'hsl(var(--clr-sec--800))',