Display a message if no OTA update have been uploaded

central_frontend/src/routes/OTARoute.tsx

@@ -14,6 +14,7 @@ import {
   TableHead,
   TableRow,
   Tooltip,
+  Typography,
 } from "@mui/material";
 import { filesize } from "filesize";
 import React from "react";
@@ -141,6 +142,14 @@ function _OTAList(p: {
     }
   };
 
+  if (p.list.length === 0) {
+    return (
+      <Typography>
+        There is no OTA update uploaded on the platform yet.
+      </Typography>
+    );
+  }
+
   return (
     <>
       {deployUpdate && (
@@ -150,7 +159,7 @@ function _OTAList(p: {
         />
       )}
       <TableContainer component={Paper}>
-        <Table sx={{ minWidth: 650 }} aria-label="simple table">
+        <Table sx={{ minWidth: 650 }} aria-label="list of updates">
           <TableHead>
             <TableRow>
               <TableCell align="center">Platform</TableCell>