Refactor: Get asset data via asset representation, not file

The "active_file" context member as a way to get the active asset should be
avoided, in favor of "asset". This moves us away from the file browser backend
as basis of the asset system,

scripts/modules/bpy_extras/asset_utils.py

@@ -25,11 +25,6 @@ class SpaceAssetInfo:
     def is_asset_browser_poll(cls, context: Context):
         return cls.is_asset_browser(context.space_data)
 
-    @classmethod
-    def get_active_asset(cls, context: Context):
-        if active_file := getattr(context, "active_file", None):
-            return active_file.asset_data
-
 
 class AssetBrowserPanel:
     bl_space_type = 'FILE_BROWSER'

scripts/startup/bl_operators/assets.py

@@ -40,8 +40,8 @@ class ASSET_OT_tag_add(AssetBrowserMetadataOperator, Operator):
     bl_options = {'REGISTER', 'UNDO'}
 
     def execute(self, context):
-        active_asset = SpaceAssetInfo.get_active_asset(context)
-        active_asset.tags.new(data_("Tag"))
+        active_asset = context.asset
+        active_asset.asset_data.tags.new(data_("Tag"))
 
         return {'FINISHED'}
 

scripts/startup/bl_ui/space_filebrowser.py

@@ -792,7 +792,8 @@ class ASSETBROWSER_PT_metadata_tags(asset_utils.AssetMetaDataPanel, Panel):
 
     def draw(self, context):
         layout = self.layout
-        asset_data = asset_utils.SpaceAssetInfo.get_active_asset(context)
+        active_asset = context.asset
+        asset_data = active_asset.asset_data
 
         row = layout.row()
         row.template_list(