fix: Fixed always recalculating split view leafs on location changes, b=no-bug, c=split-view

src/zen/split-view/ZenViewSplitter.mjs

@@ -1174,6 +1174,9 @@ class nsZenViewSplitter extends nsZenDOMOperatedFeature {
     const oldView = this.currentView;
     const newView = this._data.findIndex((group) => group.tabs.includes(tab));
 
+    if (newView === oldView && oldView < 0) {
+      return;
+    }
     if (newView < 0 && oldView >= 0) {
       this.deactivateCurrentSplitView();
       return;

src/zen/split-view/zen-decks.css

@@ -67,7 +67,7 @@
 
 #tabbrowser-tabpanels[zen-split-view='true'] .browserSidebarContainer.deck-selected {
   &:not(.zen-glance-overlay) {
-    outline: 2px solid var(--zen-primary-color) !important;
+    outline: 2px solid light-dark(var(--zen-primary-color), var(--button-background-color-primary)) !important;
   }
 
   &.zen-glance-overlay {