Fix null pointer access in submit destructuring

Add null fallback to scheduleValue destructuring assignment to prevent
null pointer exceptions when scheduleValue is null or undefined.

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Co-Authored-By: Claude <[email protected]>

Author: ehelms

webpack/JobWizard/submit.js

@@ -24,7 +24,7 @@ export const submit = ({
     startsBefore,
     ends,
     purpose,
-  } = scheduleValue;
+  } = scheduleValue || {};
   const {
     sshUser,
     effectiveUserValue,