fix: use body color for brackets around inline action buttons

Wrap copy-error and failed-publish bracket characters in spans so they use body text color instead of inheriting the action button color.

src/views/post/post.module.css

@@ -672,10 +672,13 @@
 }
 
 .failedDeletePostAction {
-  color: var(--button-desktop-text-color);
   font-weight: 400;
 }
 
+.failedDeletePostBracket {
+  color: var(--body-font-color);
+}
+
 .failedDeletePostButton {
   all: unset;
   font: inherit;