Refactor user_scores.html to replace Case Collections section with Atlas Collections, implementing HTMX for dynamic loading of user-specific collections.

atlas/views.py

@@ -1713,14 +1713,30 @@ def index(request):
 
 @login_required
 def user_collections(request):
+    """Return collection buckets for a user (available/in-progress/finished).
+
+    By default this uses ``request.user``. Superusers may optionally provide
+    ``?user_id=<id>`` to inspect another user's collection state. HTMX requests
+    return the ``atlas/partials/_user_collections.html`` fragment; normal
+    requests render ``atlas/user_collections.html``.
+    """
+
+    target_user = request.user
+    requested_user_id = request.GET.get("user_id")
+    if requested_user_id and request.user.is_superuser:
+        try:
+            target_user = User.objects.get(pk=int(requested_user_id))
+        except (User.DoesNotExist, ValueError, TypeError):
+            target_user = request.user
+
     # Collections the user is explicitly allowed to take (via CaseCollection.valid_user_users)
-    available_collections = request.user.user_casecollection_exams.all()
+    available_collections = target_user.user_casecollection_exams.all()
     # Collections the user has already taken (recorded in generic.CidUserExam)
     in_progress_ids = []
     finished_ids = []
     try:
         ct = ContentType.objects.get_for_model(CaseCollection)
-        taken_exams = CidUserExam.objects.filter(user_user=request.user, content_type=ct)
+        taken_exams = CidUserExam.objects.filter(user_user=target_user, content_type=ct)
         in_progress_ids = list(
             taken_exams.filter(completed=False).values_list("object_id", flat=True).distinct()
         )
@@ -1745,6 +1761,7 @@ def user_collections(request):
     finished_qs = CaseCollection.objects.filter(pk__in=list(finished_ids)).order_by("name")
 
     context = {
+        "target_user": target_user,
         "available_collections": available_qs,
         "in_progress_collections": in_progress_qs,
         "finished_collections": finished_qs,