fix(platform): Allow POST method for verify_email action

The PlatformUserViewSet restricted HTTP methods to GET and PATCH,
but the verify_email action requires POST. Added POST to allowed
methods.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

smoothschedule/platform_admin/views.py

@@ -820,7 +820,7 @@ class PlatformUserViewSet(viewsets.ModelViewSet):
     queryset = User.objects.all().order_by('-date_joined')
     serializer_class = PlatformUserSerializer
     permission_classes = [IsAuthenticated, IsPlatformAdmin]
-    http_method_names = ['get', 'patch', 'head', 'options']  # Allow GET and PATCH
+    http_method_names = ['get', 'post', 'patch', 'head', 'options']  # Allow GET, POST, and PATCH
 
     def get_queryset(self):
         """Optionally filter by business or role"""