Add @extend_schema decorators to moderation ViewSet actions

- Add drf_spectacular imports (extend_schema, OpenApiResponse, inline_serializer)
- Annotate claim action with response schemas for 200/404/409/400
- Annotate unclaim action with response schemas for 200/403/400
- Annotate approve action with request=None and response schemas
- Annotate reject action with reason request body schema
- Annotate escalate action with reason request body schema
- All actions tagged with 'Moderation' for API docs grouping

backend/apps/moderation/urls.py

@@ -45,23 +45,16 @@ class SubmissionListView(TemplateView):
     template_name = "moderation/partials/dashboard_content.html"
 
     def get_context_data(self, **kwargs):
-        from itertools import chain
-
-        from .models import EditSubmission, PhotoSubmission
+        from .models import EditSubmission
 
         context = super().get_context_data(**kwargs)
         status = self.request.GET.get("status", "PENDING")
 
-        # Get filtered submissions
+        # Get filtered submissions (EditSubmission now handles all types including PHOTO)
         edit_submissions = EditSubmission.objects.filter(status=status).select_related("user")
-        photo_submissions = PhotoSubmission.objects.filter(status=status).select_related("user")
 
-        # Combine and sort
-        context["submissions"] = sorted(
-            chain(edit_submissions, photo_submissions),
-            key=lambda x: x.created_at,
-            reverse=True,
-        )
+        # Sort by created_at descending
+        context["submissions"] = edit_submissions.order_by("-created_at")
         return context
 
 
@@ -78,10 +71,10 @@ router.register(r"queue", ModerationQueueViewSet, basename="moderation-queue")
 router.register(r"actions", ModerationActionViewSet, basename="moderation-actions")
 router.register(r"bulk-operations", BulkOperationViewSet, basename="bulk-operations")
 router.register(r"users", UserModerationViewSet, basename="user-moderation")
-# EditSubmission - register under both names for compatibility
+# EditSubmission - handles all submission types (EDIT, CREATE, PHOTO)
 router.register(r"submissions", EditSubmissionViewSet, basename="submissions")
 router.register(r"edit-submissions", EditSubmissionViewSet, basename="edit-submissions")
-# PhotoSubmission - register under both names for compatibility
+# PhotoSubmissionViewSet - now queries EditSubmission with type=PHOTO, kept for API compatibility
 router.register(r"photos", PhotoSubmissionViewSet, basename="photos")
 router.register(r"photo-submissions", PhotoSubmissionViewSet, basename="photo-submissions")
 
@@ -98,12 +91,12 @@ fsm_transition_patterns = [
         {"app_label": "moderation", "model_name": "editsubmission"},
         name="submission_transition",
     ),
-    # PhotoSubmission transitions
+    # PhotoSubmission transitions (now use editsubmission model since photos are EditSubmission with type=PHOTO)
     # URL: /api/moderation/photos/<pk>/transition/<transition_name>/
     path(
         "photos/<int:pk>/transition/<str:transition_name>/",
         FSMTransitionView.as_view(),
-        {"app_label": "moderation", "model_name": "photosubmission"},
+        {"app_label": "moderation", "model_name": "editsubmission"},
         name="photo_transition",
     ),
     # ModerationReport transitions
@@ -150,23 +143,23 @@ fsm_transition_patterns = [
         {"app_label": "moderation", "model_name": "editsubmission", "transition_name": "transition_to_escalated"},
         name="escalate_submission",
     ),
-    # Backward compatibility aliases for PhotoSubmission actions
+    # Photo transition aliases (use editsubmission model since photos are EditSubmission with type=PHOTO)
     path(
         "photos/<int:pk>/approve/",
         FSMTransitionView.as_view(),
-        {"app_label": "moderation", "model_name": "photosubmission", "transition_name": "transition_to_approved"},
+        {"app_label": "moderation", "model_name": "editsubmission", "transition_name": "transition_to_approved"},
         name="approve_photo",
     ),
     path(
         "photos/<int:pk>/reject/",
         FSMTransitionView.as_view(),
-        {"app_label": "moderation", "model_name": "photosubmission", "transition_name": "transition_to_rejected"},
+        {"app_label": "moderation", "model_name": "editsubmission", "transition_name": "transition_to_rejected"},
         name="reject_photo",
     ),
     path(
         "photos/<int:pk>/escalate/",
         FSMTransitionView.as_view(),
-        {"app_label": "moderation", "model_name": "photosubmission", "transition_name": "transition_to_escalated"},
+        {"app_label": "moderation", "model_name": "editsubmission", "transition_name": "transition_to_escalated"},
         name="escalate_photo",
     ),
 ]