Fix more tests

Author: OEvgeny

__tests__/html2/grouping/fluentTheme.html.snap-1.png

@@ -46,12 +46,12 @@
   }
 
   .stacked-layout__attachment-row {
-    margin-top: var(--webchat__padding--regular);
+    margin-block-start: var(--webchat__padding--regular);
     width: 100%;
   }
 
   &.stacked-layout--no-message .stacked-layout__attachment-list .stacked-layout__attachment-row:first-child {
-    margin-top: 0;
+    margin-block-start: 0;
   }
 
   .stacked-layout__avatar-gutter {

packages/component/src/Activity/StackedLayout.module.css

@@ -118,6 +118,14 @@
     color: var(--webchat-colorNeutralForeground4);
     margin: var(--webchat__bubble--block-padding) var(--webchat__bubble--inline-padding) 0;
   }
+
+  :global(.stacked-layout__attachment-row) {
+    margin-block-start: var(--webchat-spacingVerticalMNudge);
+  }
+
+  &:global(.stacked-layout--no-message .stacked-layout__attachment-row) {
+    margin-block-start: 0;
+  }
 }
 
 /* Stacked layout which has message bubble */

packages/fluent-theme/src/components/activity/ActivityDecorator.module.css

@@ -6,7 +6,7 @@
   width: auto;
 
   &.variant-fluent {
-    margin: 0 0 var(--webchat-spacingVerticalM) var(--webchat-spacingHorizontalNudge);
+    margin: 0 0 var(--webchat-spacingVerticalM) var(--webchat-spacingHorizontalSNudge);
   }
 
   &.variant-copilot {