Fix exception in job page

src/pages/internal/jobs.tsx

@@ -82,7 +82,7 @@ function JobList({ jobsResp }: { jobsResp: GetJobsResponse }) {
                                     <td>{job.on_end_event_type}</td>
                                     <td>
                                         <ExpandableString
-                                            value={job.on_end_event_data}
+                                            value={job.on_end_event_data && JSON.stringify(job.on_end_event_data)}
                                             maxLength={20}
                                         />
                                     </td>

src/videoag/miscellaneous/ExpandableString.tsx

@@ -8,6 +8,9 @@ export function ExpandableString({
     maxLength: number;
 }) {
     value = value ?? "";
+    if (typeof value !== "string") {
+        throw new TypeError(`Cannot handle non-string value of type '${typeof value}': ${value}`);
+    }
 
     const [expand, setExpand] = useState(false);
     if (value.length <= maxLength) return value;