fix(test): fix directions text

src/pages/student/practice/Test.tsx

@@ -1671,7 +1671,8 @@ export const Test = () => {
                   {showDirections ? (
                     <div className="t-card p-6 flex-1">
                       <p className="font-semibold text-gray-700 leading-relaxed">
-                        {renderQuestionText(currentQuestion?.explanation || "")}
+                        Answer all questions in this section based on the
+                        information provided.
                       </p>
                     </div>
                   ) : (
@@ -1717,7 +1718,9 @@ export const Test = () => {
                       <div className="t-card p-6 flex-1">
                         <HighlightableRichText
                           fieldKey={`${currentQuestion?.id ?? "unknown"}:explanation`}
-                          text={currentQuestion?.explanation || ""}
+                          text={
+                            "Answer all questions in this section based on the information provided."
+                          }
                           className="font-semibold text-gray-700 leading-relaxed"
                         />
                       </div>