fix: Add tags count to library block metadata

openedx/core/djangoapps/content_libraries/api.py

@@ -241,6 +241,13 @@ def from_component(cls, library_key, component):
         last_draft_created = draft.created if draft else None
         last_draft_created_by = draft.publishable_entity_version.created_by if draft else None
 
+        # Build 'lib:' component usage_key from component slug and library_key
+        component_key = str(component).replace('xblock.v1:', f'{str(library_key)}:').replace('lib:', 'lb:')
+        components_tags = _get_library_component_tags_count(library_key)
+        tags_count = 0
+        if component_key in components_tags:
+            tags_count = components_tags[component_key]
+
         return cls(
             usage_key=LibraryUsageLocatorV2(
                 library_key,
@@ -255,6 +262,7 @@ def from_component(cls, library_key, component):
             last_draft_created=last_draft_created,
             last_draft_created_by=last_draft_created_by,
             has_unpublished_changes=component.versioning.has_unpublished_changes,
+            tags_count=tags_count
         )