fix: show meaningful update runs and tidy update access layout

internal/web/templates/dashboard.html

@@ -28,6 +28,7 @@
   {{if .IsAdmin}}
   <article class="panel">
     <div class="panel-heading"><div><span class="section-label">Scheduler</span><h2>Letzte Update-Läufe</h2></div><div class="panel-links"><a href="/errors" class="{{if .Dashboard.ErrorCount}}text-danger{{end}}">Alle Fehler{{if .Dashboard.ErrorCount}} · {{.Dashboard.ErrorCount}}{{end}}</a><a href="/settings">Konfiguration</a></div></div>
+    <p class="panel-description">Die letzten Änderungen, Fehler und Teilerfolge.</p>
     <div data-recent-runs aria-live="polite" aria-busy="{{.Dashboard.SchedulerRunning}}">
     {{if .Dashboard.RecentRuns}}
     <div class="data-list">
@@ -35,7 +36,7 @@
       <div class="data-row"><span class="state-dot {{statusClass .Status}}"></span><span><strong>{{if .Summary}}{{.Summary}}{{else if eq .Status "running"}}Aktualisierung läuft{{else}}Update-Lauf{{end}}</strong><small><time data-local-time="{{unixSeconds .StartedAt}}">{{formatTime .StartedAt}}</time></small></span><span class="status-pill {{statusClass .Status}}">{{.Status}}</span></div>
       {{end}}
     </div>
-    {{else}}<div class="empty-state">Noch kein Update-Lauf protokolliert.</div>{{end}}
+    {{else}}<div class="empty-state">Noch keine Änderungen oder Fehler protokolliert.</div>{{end}}
     </div>
   </article>
   {{end}}