Enhance public access and error handling in site-related views and loaders

- Updated `DebugScopedRateThrottle` to allow public access for blueprint list requests with site filters.
- Modified `SiteViewSet` and `SiteBlueprintViewSet` to permit public read access for list requests.
- Enhanced `loadSiteDefinition` to resolve site slugs to IDs, improving the loading process for site definitions.
- Improved error handling in `SiteDefinitionView` and `loadSiteDefinition` for better user feedback.
- Adjusted CSS styles for better layout and alignment in shared components.

backend/igny8_core/modules/site_builder/views.py

@@ -39,6 +39,47 @@ class SiteBlueprintViewSet(SiteSectorModelViewSet):
     permission_classes = [IsAuthenticatedAndActive, IsEditorOrAbove]
     throttle_scope = 'site_builder'
     throttle_classes = [DebugScopedRateThrottle]
+    
+    def get_permissions(self):
+        """
+        Allow public read access for list requests with site filter (used by Sites Renderer fallback).
+        This allows the Sites Renderer to load blueprint data for deployed sites without authentication.
+        """
+        # Allow public access for list requests with site filter (used by Sites Renderer)
+        if self.action == 'list' and self.request.query_params.get('site'):
+            from rest_framework.permissions import AllowAny
+            return [AllowAny()]
+        # Otherwise use default permissions
+        return super().get_permissions()
+    
+    def get_throttles(self):
+        """
+        Bypass throttling for public list requests with site filter (used by Sites Renderer).
+        """
+        # Bypass throttling for public requests (no auth) with site filter
+        if self.action == 'list' and self.request.query_params.get('site'):
+            if not self.request.user or not self.request.user.is_authenticated:
+                return []  # No throttling for public blueprint access
+        return super().get_throttles()
+    
+    def get_queryset(self):
+        """
+        Override to allow public access when filtering by site_id.
+        """
+        # If this is a public request (no auth) with site filter, bypass base class filtering
+        # and return deployed blueprints for that site
+        if not self.request.user or not self.request.user.is_authenticated:
+            site_id = self.request.query_params.get('site')
+            if site_id:
+                # Return queryset directly from model (bypassing base class account/site filtering)
+                from igny8_core.business.site_building.models import SiteBlueprint
+                return SiteBlueprint.objects.filter(
+                    site_id=site_id, 
+                    status='deployed'
+                ).prefetch_related('pages').order_by('-version')
+        
+        # For authenticated users, use base class filtering
+        return super().get_queryset()
 
     def perform_create(self, serializer):
         from igny8_core.auth.models import Site, Sector