Add 'Back' button to QuizRunner component

client/src/components/QuizRunner.tsx

@@ -445,11 +445,18 @@ export default function QuizRunner({ defaultMode = 'all', defaultEntryId, autoSt
   }
 
   if (status === 'finished') {
+    const lastIndex = questions.length ? questions.length - 1 : 0;
     return (
       <div className="quiz-finished">
         <h2>Nice work!</h2>
         <p className="muted">You scored {score} out of {questions.length}.</p>
         <div className="actions">
+          <button className="button button--ghost" onClick={() => {
+            setStatus('running');
+            setCurrentIndex(lastIndex);
+          }}>
+            Back
+          </button>
           <button className="button" onClick={startQuiz}>
             Play again
           </button>