Fix follow link style in embeds (#25965)

app/helpers/accounts_helper.rb

@@ -22,7 +22,7 @@ module AccountsHelper
   def account_action_button(account)
     return if account.memorial? || account.moved?
 
-    link_to ActivityPub::TagManager.instance.url_for(account), class: 'button', target: '_new' do
+    link_to ActivityPub::TagManager.instance.url_for(account), class: 'button logo-button', target: '_new' do
       safe_join([logo_as_symbol, t('accounts.follow')])
     end
   end

app/javascript/styles/mastodon/statuses.scss

@@ -77,6 +77,18 @@
   }
 }
 
+.button.logo-button svg {
+  width: 20px;
+  height: auto;
+  vertical-align: middle;
+  margin-inline-end: 5px;
+  fill: $primary-text-color;
+
+  @media screen and (max-width: $no-gap-breakpoint) {
+    display: none;
+  }
+}
+
 .embed {
   .status__content[data-spoiler='folded'] {
     .e-content {