style(ui): de-emphasize Whack Pack branding in header, pipeline columns, and spark cards

public/styles.css

@@ -273,6 +273,16 @@ body {
   border-color: var(--border-strong);
 }
 
+.view-tab-subtle {
+  opacity: 0.72;
+  font-size: 0.8rem;
+}
+
+.view-tab-subtle:hover,
+.view-tab-subtle.active {
+  opacity: 1;
+}
+
 .tab-pill {
   font-size: 0.7rem;
   padding: 0.08rem 0.4rem;