fix

src/lib/llmSchemas.js

@@ -112,20 +112,32 @@ export const learningAllSchema = z.object({
   infographic: infographicBodySchema,
 });
 
-const quizDifficultyEnum = z.enum(['easy', 'medium', 'hard']);
+const quizDifficultyEnum = z.enum(['easy', 'medium', 'hard']).catch('medium');
 
 const quizQuestionSchema = z.object({
-  id: z.string().min(1),
+  id: z.string().min(1).catch(`gen-${Math.random().toString(36).slice(2, 8)}`),
   question: z.string().min(1),
-  topicLabel: z.string().min(1),
+  topicLabel: z.string().min(1).catch('General'),
   options: z.array(z.string().min(1)).length(4),
-  correctIndex: z.number().int().min(0).max(3),
-  explanation: z.string().min(1),
+  correctIndex: z.preprocess(
+    (v) => (typeof v === 'number' ? Math.round(v) : v),
+    z.number().int().min(0).max(3),
+  ),
+  explanation: z.string().min(1).catch('See the correct answer above.'),
   difficulty: quizDifficultyEnum,
 });
 
 export const quizQuestionsSchema = z.object({
-  questions: z.array(quizQuestionSchema).min(1),
+  questions: z.preprocess(
+    (v) => {
+      // If the model returned an array directly, wrap it
+      if (Array.isArray(v)) return v;
+      // If it returned a single object, wrap in array
+      if (v && typeof v === 'object' && !Array.isArray(v)) return [v];
+      return v;
+    },
+    z.array(quizQuestionSchema).min(1),
+  ),
 });
 
 export const customTopicSchema = z.object({