feat: added disabling of runProgram button if program is not valid

ref: N25B-450

src/pages/VisProgPage/VisProg.tsx

@@ -186,10 +186,17 @@ function graphReducer() {
  * @constructor
  */
 function VisProgPage() {
+  const [programValidity, setProgramValidity] = useState<boolean>(true);
+  const sIndex = useFlowStore.getState().severityIndex;
+
+  useEffect(() => {
+    setProgramValidity(useFlowStore.getState().isProgramValid)
+  }, [sIndex]);
+
   return (
     <>
       <VisualProgrammingUI/>
-      <button onClick={runProgram}>run program</button>
+      <button onClick={runProgram} disabled={programValidity}>run program</button>
     </>
   )
 }