Fix CBT session isolation and backend seed mock data exam pattern

backend/seed.py

@@ -457,9 +457,12 @@ def seed_local_database():
 
                 subject = raw_questions[0].get("subject", "General") if raw_questions else "General"
                 topic = raw_questions[0].get("topic", "Chapter 4") if raw_questions else "Chapter 4"
-                sheet_title = f"{subject} — {topic} DPS"
+                sheet_title = f"{subject} DPS"
                 sheet_date = date.today() - timedelta(days=i)
 
+                is_neet = any(s in subject.lower() for s in ["botany", "zoology", "bio", "biology"])
+                dps_pattern = models.ExamEnum.NEET if is_neet else models.ExamEnum.JEE_MAIN
+
                 # Create Question records from the JSON
                 q_ids = []
                 for raw_q in raw_questions:
@@ -475,7 +478,7 @@ def seed_local_database():
                         correct_answer=raw_q.get("correct_answer", {"value": "A"}),
                         solution_text=raw_q.get("solution_text", "Refer to standard solution."),
                         language=models.MediumEnum.ENGLISH,
-                        exam=models.ExamEnum.JEE_MAIN,
+                        exam=dps_pattern,
                         created_by=admin_id,
                     )
                     dps_session.add(q)
@@ -499,7 +502,7 @@ def seed_local_database():
                     id=dps_id,
                     title=sheet_title,
                     type="DPS",
-                    exam_pattern=models.ExamEnum.JEE_MAIN,
+                    exam_pattern=dps_pattern,
                     sections={"Practice": {"questions": q_ids, "time_limit": 30}},
                     total_time=30,
                     difficulty="Medium",
@@ -519,3 +522,4 @@ def seed_local_database():
 
 if __name__ == "__main__":
     seed_local_database()
+