Session 2026-04-23: Desktop Multi-Column, Forum, Fixes, Analytics

- Desktop ≥1024px: page-container 680→860px
- Walks: Liste+Karte nebeneinander, View-Toggle ausgeblendet
- Forum: Rubriken 2-zeilig via CSS Grid (ceil(n/2) Spalten, zentriert)
- Welcome: max-width 920px, Feature-Sections 2-spaltig
- Wissen: Toggle-Mechanismus entfernt, Items immer sichtbar
- Übungen Plan-Karten: vertikal statt horizontal gestapelt
- Admin Analytics: Umami v2 gibt plain numbers statt {value:X}
- CSS-Spezifität: #page-forum nötig wegen layout.css < components.css
- SW by-v312, APP_VER 300

backend/static/js/pages/admin.js

@@ -114,17 +114,20 @@ window.Page_admin = (() => {
       </svg>`;
     }
 
-    const tv  = v => v?.value ?? 0;
+    // Umami v2 liefert plain numbers, v1 liefert {value: X} — beide abfangen
+    const tv  = v => (v != null && typeof v === 'object') ? (v.value ?? 0) : (v ?? 0);
     const fmt = v => Number(v).toLocaleString('de');
 
     // Bounce Rate & Verweildauer
-    const bounceToday = d.today?.bounceRate?.value != null
-      ? (d.today.bounceRate.value * 100).toFixed(0) + ' %'
-      : (d.today?.bounces?.value != null && d.today?.visits?.value > 0
-          ? ((d.today.bounces.value / d.today.visits.value) * 100).toFixed(0) + ' %'
-          : '—');
-    const timeWeek = d.week?.totaltime?.value > 0 && d.week?.visits?.value > 0
-      ? Math.round(d.week.totaltime.value / d.week.visits.value) + ' s'
+    const _bounces = tv(d.today?.bounces);
+    const _visits  = tv(d.today?.visits);
+    const bounceToday = _visits > 0
+      ? ((_bounces / _visits) * 100).toFixed(0) + ' %'
+      : '—';
+    const _totaltime = tv(d.week?.totaltime);
+    const _visitsW   = tv(d.week?.visits);
+    const timeWeek = _totaltime > 0 && _visitsW > 0
+      ? Math.round(_totaltime / _visitsW) + ' s'
       : '—';
 
     el.innerHTML = `