add background hover color change

gui/assets/main.scss

@@ -84,7 +84,6 @@ a:visited {
 }
 
 
-
 .channel_header {
     display: flex;
     flex-direction: row;
@@ -105,9 +104,16 @@ a:visited {
 /* The whole right side of the row is the dblclick target */
 .channel_row_click {
     flex: 1;
+    padding: 0.1rem 0.25rem 0.1rem 0.5rem;
     cursor: pointer;
 }
 
+/* Hover highlight for whole row area (title + blank space) */
+.channel_row_click:hover {
+    background-color: var(--channel-hover-bg, #222); /* pick your color */
+}
+
+
 /* still keep text non-selectable if desired */
 .channel_details {
     -webkit-user-select: none;