Enhance ImagesViewSet and Images component with site and sector filtering

- Added site_id and sector_id query parameter support in ImagesViewSet for filtering content and task-linked images.
- Implemented event listeners in the Images component to refresh data on site and sector changes.
- Updated image prompt handling to allow undefined values.

backend/igny8_core/modules/writer/views.py

@@ -663,17 +663,47 @@ class ImagesViewSet(SiteSectorModelViewSet):
         
         account = getattr(request, 'account', None)
         
+        # Get site_id and sector_id from query parameters
+        site_id = request.query_params.get('site_id')
+        sector_id = request.query_params.get('sector_id')
+        
         # Get all content that has images (either directly or via task)
         # First, get content with direct image links
         queryset = Content.objects.filter(images__isnull=False)
         if account:
             queryset = queryset.filter(account=account)
         
+        # Apply site/sector filtering if provided
+        if site_id:
+            try:
+                queryset = queryset.filter(site_id=int(site_id))
+            except (ValueError, TypeError):
+                pass
+        
+        if sector_id:
+            try:
+                queryset = queryset.filter(sector_id=int(sector_id))
+            except (ValueError, TypeError):
+                pass
+        
         # Also get content from images linked via task
         task_linked_images = Images.objects.filter(task__isnull=False, content__isnull=True)
         if account:
             task_linked_images = task_linked_images.filter(account=account)
         
+        # Apply site/sector filtering to task-linked images
+        if site_id:
+            try:
+                task_linked_images = task_linked_images.filter(site_id=int(site_id))
+            except (ValueError, TypeError):
+                pass
+        
+        if sector_id:
+            try:
+                task_linked_images = task_linked_images.filter(sector_id=int(sector_id))
+            except (ValueError, TypeError):
+                pass
+        
         # Get content IDs from task-linked images
         task_content_ids = set()
         for image in task_linked_images:
@@ -694,6 +724,7 @@ class ImagesViewSet(SiteSectorModelViewSet):
         for content_id in content_ids:
             try:
                 content = Content.objects.get(id=content_id)
+                
                 # Get images linked directly to content OR via task
                 content_images = Images.objects.filter(
                     Q(content=content) | Q(task=content.task)