Add downsample series functionality and related UI updates

- Implemented asynchronous downsample task for series with progress tracking.
- Added new URL endpoint for downsample status.
- Updated Series model to include source_series_instance_uid.
- Enhanced case display template with new buttons for series actions.
- Added password reset functionality in user profile with appropriate alerts.
- Created migration for new source_series_instance_uid field in Series model.

generic/views.py

@@ -5855,15 +5855,31 @@ def create_user(request, context=None, trainee: bool = False):
 
         if form.is_valid():
             try:
+                username = form.cleaned_data["username"].strip().lower()
+                existing_user = User.objects.filter(
+                    Q(username__iexact=username) | Q(email__iexact=username)
+                ).first()
+
                 user_dict = {
-                    "username": request.POST["username"],
-                    "first_name": request.POST["first_name"],
-                    "last_name": request.POST["last_name"],
-                    "email": request.POST["username"],
+                    "username": username,
+                    "first_name": form.cleaned_data["first_name"],
+                    "last_name": form.cleaned_data["last_name"],
+                    "email": username,
                     "password": secrets.token_hex(nbytes=16),
                 }
 
-                new_user = User.objects.create_user(**user_dict)
+                with transaction.atomic():
+                    if existing_user is not None:
+                        existing_user.username = user_dict["username"]
+                        existing_user.email = user_dict["email"]
+                        existing_user.first_name = user_dict["first_name"]
+                        existing_user.last_name = user_dict["last_name"]
+                        existing_user.save(
+                            update_fields=["username", "email", "first_name", "last_name"]
+                        )
+                        new_user = existing_user
+                    else:
+                        new_user = User.objects.create_user(**user_dict)
             except Exception as error:
                 errors = f"Unable to create account: {error}"
                 return render(
@@ -5873,15 +5889,15 @@ def create_user(request, context=None, trainee: bool = False):
                 )
 
             try:
-                user_profile = UserProfile.objects.get(user=new_user)
+                user_profile, _ = UserProfile.objects.get_or_create(user=new_user)
                 user_profile.peninsula_trainee = trainee
 
-                if request.POST["grade"]:
-                    grade = UserGrades.objects.get(pk=request.POST["grade"])
+                if form.cleaned_data.get("grade"):
+                    grade = form.cleaned_data["grade"]
                     user_profile.grade = grade
 
-                if "supervisor" in request.POST and request.POST["supervisor"]:
-                    supervisor = Supervisor.objects.get(pk=request.POST["supervisor"])
+                if trainee and form.cleaned_data.get("supervisor"):
+                    supervisor = form.cleaned_data["supervisor"]
                     user_profile.supervisor = supervisor
 
                 user_profile.save()