feat: admin date-time calendar controller, dpp ui cleanup, 4-subject jee+neet tracker, calendar filter, and clean new account state

backend/main.py

@@ -899,8 +899,8 @@ DEMO_DEFINITIONS = {
         "state": "Bihar",
         "school": "Loyola High School",
         "tier": models.TierEnum.FREE,
-        "streak_count": 1,
-        "longest_streak": 1,
+        "streak_count": 0,
+        "longest_streak": 0,
         # trial_end is intentionally omitted here — it is set dynamically at creation time
     },
 }
@@ -1110,7 +1110,6 @@ DEMO_USER_UUIDS = {
     "11111111-1111-1111-1111-111111111111",  # Aarav (AI Coach - JEE)
     "22222222-2222-2222-2222-222222222222",  # Neha (AI Coach - NEET)
     "33333333-3333-3333-3333-333333333333",  # Rohan (AI Coach - JEE+NEET)
-    "44444444-4444-4444-4444-444444444444",  # Amit (Free - JEE)
 }
 
 @app.get("/api/users/{user_id}/stats", tags=["Users"])
@@ -1343,6 +1342,7 @@ async def upload_admin_test(
     exam_pattern: str = Form(...),
     time_limit: int = Form(...),
     scheduled_date: Optional[datetime] = Form(None),
+    end_date: Optional[datetime] = Form(None),
     admin_id: Optional[UUID] = Form(None),
     session: Session = Depends(get_session),
     current_user: models.User = Depends(get_current_user),
@@ -1388,6 +1388,7 @@ async def upload_admin_test(
         total_time=time_limit,
         difficulty="Medium",
         scheduled_date=scheduled_date,
+        end_date=end_date,
         is_active=True,
         created_by=effective_admin_id,
         pdf_url=url
@@ -1534,6 +1535,42 @@ def toggle_test_status(test_id: UUID, session: Session = Depends(get_session), c
 
     return {"status": "success", "is_active": test_obj.is_active}
 
+class UpdateTestScheduleInput(BaseModel):
+    scheduled_date: Optional[datetime] = None
+    end_date: Optional[datetime] = None
+    title: Optional[str] = None
+    is_active: Optional[bool] = None
+
+@app.put("/api/admin/tests/{test_id}/schedule", tags=["Admin"])
+def update_test_schedule(
+    test_id: UUID,
+    data: UpdateTestScheduleInput,
+    session: Session = Depends(get_session),
+    current_user: models.User = Depends(get_current_user)
+):
+    test_obj = session.get(models.Test, test_id)
+    if not test_obj:
+        raise HTTPException(status_code=404, detail="Test not found")
+
+    test_obj.scheduled_date = data.scheduled_date
+    test_obj.end_date = data.end_date
+    if data.title is not None:
+        test_obj.title = data.title
+    if data.is_active is not None:
+        test_obj.is_active = data.is_active
+    session.add(test_obj)
+    session.commit()
+    session.refresh(test_obj)
+
+    return {
+        "status": "success",
+        "test_id": test_obj.id,
+        "title": test_obj.title,
+        "scheduled_date": test_obj.scheduled_date,
+        "end_date": test_obj.end_date,
+        "is_active": test_obj.is_active
+    }
+
 @app.delete("/api/admin/tests/{test_id}", tags=["Admin"])
 def delete_test(test_id: UUID, session: Session = Depends(get_session), current_user: models.User = Depends(get_current_user)):
     from sqlmodel import select