fix(ui): restore channel and detail keyboard scrolling

apps/web/src/styles.scss

@@ -261,3 +261,8 @@ textarea,
     white-space: nowrap;
     border: 0;
 }
+
+.channel-scroll-focus:focus-visible {
+    outline: 2px solid var(--app-selection-color);
+    outline-offset: -2px;
+}