feat: support assistant frontend (#2139)

Co-authored-by: StyleZhang <jasonapring2015@outlook.com>

web/app/components/base/app-icon/style.module.css

@@ -1,15 +1,23 @@
 .appIcon {
   @apply flex items-center justify-center relative w-9 h-9 text-lg bg-teal-100 rounded-lg grow-0 shrink-0;
 }
+
 .appIcon.large {
   @apply w-10 h-10;
 }
+
 .appIcon.small {
   @apply w-8 h-8;
 }
+
 .appIcon.tiny {
   @apply w-6 h-6 text-base;
 }
+
+.appIcon.xs {
+  @apply w-3 h-3 text-base;
+}
+
 .appIcon.rounded {
   @apply rounded-full;
-}
+}