Add mark2 overview page and update navigation for improved marking workflow

anatomy/views.py

@@ -15,6 +15,7 @@ from django.views.generic.edit import CreateView, UpdateView, DeleteView
 from django.views.generic import ListView
 
 from django.db.models.functions import Lower
+from django.db.models import Prefetch
 
 from django.core.cache import cache
 
@@ -780,6 +781,65 @@ def mark2(request, exam_pk, sk, unmarked_exam_answers_only=True, review=False):
     return render(request, "anatomy/mark2.html", context)
 
 
+@login_required
+def mark2_overview(request, pk):
+    """Overview page for mark2 workflow: lists questions and unmarked counts and links into mark2."""
+    exam = get_object_or_404(Exam, pk=pk)
+
+    if not exam.exam_mode:
+        raise Http404("Packet not in exam mode")
+
+    # Only allow authors or designated markers
+    if request.user not in exam.author.all():
+        if not GenericExamViews.check_user_marker_access(request.user, pk):
+            raise PermissionDenied
+
+    # For anatomy prefer prefetch similar to generic.mark_overview
+    questions = (
+        exam.exam_questions.select_related(
+            "modality",
+            "structure",
+            "body_part",
+            "region",
+            "examination",
+            "question_type",
+        )
+        .all()
+        .prefetch_related(
+            Prefetch(
+                "answers",
+                queryset=Answer.objects.filter(proposed=False, status=Answer.MarkOptions.CORRECT),
+                to_attr="prefetched_primary_answer",
+            ),
+        )
+        .order_by("examquestiondetail__sort_order")
+    )
+
+    # Handle double marking which needs per-marker counts
+    try:
+        if exam.double_mark:
+            question_unmarked_map = []
+            for q in questions:
+                question_unmarked_map.append(
+                    (
+                        q,
+                        int(q.get_unmarked_user_answer_count(exam_pk=exam.pk)),
+                        int(q.get_unmarked_user_answer_count(exam_pk=exam.pk, marker=request.user)),
+                    )
+                )
+
+            return render(request, "anatomy/mark2_overview.html", {"exam": exam, "question_unmarked_map": question_unmarked_map})
+    except AttributeError:
+        pass
+
+    question_unmarked_map = []
+    for q in questions:
+        count = int(q.get_unmarked_user_answer_count(exam_pk=exam.pk))
+        question_unmarked_map.append((q, count, count))
+
+    return render(request, "anatomy/mark2_overview.html", {"exam": exam, "question_unmarked_map": question_unmarked_map})
+
+
 @login_required
 def mark2_toggle_answer(request):
     """Endpoint to toggle/set a single answer mark quickly.