feat(post): add floating preview of media from link in post content

src/components/comment-media/comment-media.module.css

@@ -11,13 +11,16 @@
   overflow: hidden;
 }
 
-.subplebbitAvatar {
+.floatingEmbed, .subplebbitAvatar {
   max-width: 250px;
   max-height: 250px;
-  margin: 3px 20px 5px 0;
   display: inline-block;
 }
 
+.subplebbitAvatar {
+  margin: 3px 20px 5px 0;
+}
+
 .spoiler {
   display: inline-block;
   margin: 3px 20px 5px 20px;
@@ -131,4 +134,11 @@
 
 .fileDeleted {
   image-rendering: pixelated;
+}
+
+@media (min-width: 640px) {
+  .thumbnail,
+  .content {
+    line-height: 0; /* Ensure no extra space due to line-height */
+  }
 }