diff --git a/diagnostic/index.html b/diagnostic/index.html
index 312eefa..eb86292 100644
--- a/diagnostic/index.html
+++ b/diagnostic/index.html
@@ -3486,9 +3486,12 @@
     };
 
     // Welche Type-Headings sind eingeklappt? Persistiert in localStorage.
+    // Default beim ersten Laden: alle bekannten Types eingeklappt — Stefan
+    // klappt gezielt auf was er sehen will (sonst Wand of Text).
     let brainCollapsedTypes = (() => {
-      try { return new Set(JSON.parse(localStorage.getItem('aria_brain_collapsed_types') || '[]')); }
-      catch { return new Set(); }
+      const raw = localStorage.getItem('aria_brain_collapsed_types');
+      if (raw == null) return new Set(BRAIN_TYPE_ORDER);
+      try { return new Set(JSON.parse(raw)); } catch { return new Set(BRAIN_TYPE_ORDER); }
     })();
     function persistCollapsedTypes() {
       try { localStorage.setItem('aria_brain_collapsed_types', JSON.stringify(Array.from(brainCollapsedTypes))); } catch {}