done

src/contexts/AdminCoursesContext.jsx

@@ -614,9 +614,9 @@ export function CoursesProvider({ children }) {
   );
 
   const bulkSyncQuizQuestions = useCallback(
-    (courseId, unitId, quizId, questions, updatedBy) =>
+    (courseId, unitId, quizId, questions, updatedBy, confirmFullReplace = false) =>
       request(async () => {
-        const { data } = await api.put(`${unitBase(courseId, unitId)}/quiz/${quizId}/questions/bulk-sync`, { questions, updatedBy });
+        const { data } = await api.put(`${unitBase(courseId, unitId)}/quiz/${quizId}/questions/bulk-sync`, { questions, updatedBy, confirmFullReplace });
         const result = data?.data?.data ?? [];
         setQuestions(result);
         toast("Quiz saved.");
@@ -975,9 +975,9 @@ export function CoursesProvider({ children }) {
   );
 
   const bulkSyncAssessmentQuestions = useCallback(
-    (courseId, assessmentId, questions, updatedBy) =>
+    (courseId, assessmentId, questions, updatedBy, confirmFullReplace = false) =>
       request(async () => {
-        const { data } = await api.put(`${BASE}/${courseId}/assessment/${assessmentId}/questions/bulk-sync`, { questions, updatedBy });
+        const { data } = await api.put(`${BASE}/${courseId}/assessment/${assessmentId}/questions/bulk-sync`, { questions, updatedBy, confirmFullReplace });
         const result = data?.data?.data ?? [];
         setQuestions(result);
         toast("Assessment saved.");

src/modules/admin/pages/courses/CourseAssessment.jsx

@@ -233,6 +233,7 @@ export default function CourseAssessment() {
   const [confirmLoading, setConfirmLoading]      = useState(false);
   const pendingSaveRef   = useRef(null); // stores the meta+questions payload until confirmed
   const initialSnapshot  = useRef(null);
+  const originalQuestionIdsRef = useRef([]); // ids loaded from the server — used to detect a full-pool wipe on save
 
   const questionRefs = useRef([]);
   const navItemRefs = useRef([]);
@@ -271,6 +272,7 @@ export default function CourseAssessment() {
     setTitle(t); setPassingScore(ps); setTimeLimit(tl); setIsRequired(ir);
     setMaxQuestions(mq); setMaxAttempts(ma); setCooldownHours(ch); setShuffleQuestions(sq); setQuestions(qs);
     initialSnapshot.current = snapAssessment({ title: t, passingScore: ps, timeLimit: tl, isRequired: ir, maxQuestions: mq, maxAttempts: ma, cooldownHours: ch, shuffleQuestions: sq, questions: qs });
+    originalQuestionIdsRef.current = qs.map((q) => q.question_id).filter(Boolean);
   }, [localAssessment]);
 
   // ── Measure sticky header → --assessment-h ────────────────────────────────
@@ -430,14 +432,28 @@ export default function CourseAssessment() {
     let id = assessmentId;
     if (!id) {
       const res = await createAssessment(courseId, meta);
-      id = res?.data?.data?.data?.assessment_id;
+      // res is the raw response body: { status, message, data: { data: assessment } }
+      // (createAssessment() itself unwraps the same object as data?.data?.data to get
+      // the assessment row — this needs the same two levels, not three).
+      id = res?.data?.data?.assessment_id;
       if (!id) return;
       setLocalAssessment((prev) => ({ ...prev, assessment_id: id }));
     } else {
       await updateAssessment(courseId, id, meta);
     }
 
-    await bulkSyncAssessmentQuestions(courseId, id, questions, user?.user_id);
+    // A save that keeps none of the previously-loaded question ids would archive the
+    // entire existing pool in one call — could be a deliberate "start over", but is
+    // exactly the signature of a stale/incomplete state bug. Require explicit confirmation.
+    const retainedIds = questions.map((q) => q.question_id).filter(Boolean);
+    const wipesPool = originalQuestionIdsRef.current.length > 0 && retainedIds.length === 0;
+    if (wipesPool && !window.confirm(
+      `This will permanently remove all ${originalQuestionIdsRef.current.length} existing question(s) from this assessment. Continue?`
+    )) {
+      return;
+    }
+
+    await bulkSyncAssessmentQuestions(courseId, id, questions, user?.user_id, wipesPool);
 
     initialSnapshot.current = snapAssessment({ title, passingScore, timeLimit, isRequired, maxQuestions, maxAttempts, cooldownHours, shuffleQuestions, questions });
   };

src/modules/admin/pages/courses/units/ModifyQuiz.jsx

@@ -222,6 +222,7 @@ export default function ModifyQuiz() {
   const navContainerRef  = useRef(null);
   const headerRef        = useRef(null);
   const initialSnapshot  = useRef(null);
+  const originalQuestionIdsRef = useRef([]); // ids loaded from the server — used to detect a full-pool wipe on save
 
   // Junction revamp — this builder runs course-scoped AND from the standalone
   // Unit Library (/admin/units/:unitId/quiz/edit, no :courseId param).
@@ -273,6 +274,7 @@ export default function ModifyQuiz() {
     const qs = (localQuiz.questions ?? []).map((q) => ({ ...q, _tempId: q.question_id, options: q.options ?? [] }));
     setTitle(t); setPassingScore(ps); setIsRequired(ir); setMaxQuestions(mq); setShuffleQuestions(sq); setQuestions(qs);
     initialSnapshot.current = snapQuiz({ title: t, passingScore: ps, isRequired: ir, maxQuestions: mq, shuffleQuestions: sq, questions: qs });
+    originalQuestionIdsRef.current = qs.map((q) => q.question_id).filter(Boolean);
   }, [localQuiz]);
 
   // ── Measure sticky header → --quiz-h ──────────────────────────────────────
@@ -416,7 +418,18 @@ export default function ModifyQuiz() {
       await updateQuiz(courseId, unitId, quizId, meta);
     }
 
-    await bulkSyncQuizQuestions(courseId, unitId, quizId, questions, user?.user_id);
+    // A save that keeps none of the previously-loaded question ids would archive the
+    // entire existing pool in one call — could be a deliberate "start over", but is
+    // exactly the signature of a stale/incomplete state bug. Require explicit confirmation.
+    const retainedIds = questions.map((q) => q.question_id).filter(Boolean);
+    const wipesPool = originalQuestionIdsRef.current.length > 0 && retainedIds.length === 0;
+    if (wipesPool && !window.confirm(
+      `This will permanently remove all ${originalQuestionIdsRef.current.length} existing question(s) from this quiz. Continue?`
+    )) {
+      return;
+    }
+
+    await bulkSyncQuizQuestions(courseId, unitId, quizId, questions, user?.user_id, wipesPool);
 
     initialSnapshot.current = snapQuiz({ title, passingScore, isRequired, maxQuestions, shuffleQuestions, questions });
     navigate(`${scopeBase}/view`);