Changeset 0.22.7 (#149)

src/js/panels.js

@@ -76,11 +76,20 @@ const PanelRegistry = {
             return;
         }
 
-        // Hide current active
+        // Hide current active (saves state + fires onClose)
         if (this._active && this._active !== name) {
             this._hide(this._active);
         }
 
+        // Hide ALL panel pages in the body, including unregistered ones
+        // (e.g. sidePanelPreview which is a static placeholder)
+        const body = this._body();
+        if (body) {
+            body.querySelectorAll('.side-panel-page').forEach(el => {
+                if (el !== panel.element) el.style.display = 'none';
+            });
+        }
+
         // Show the secondary pane
         container.classList.add('open');
         this._showHandle(true);