diff --git a/src/static/dashboard.html b/src/static/dashboard.html
index 13e7bad..775117d 100644
--- a/src/static/dashboard.html
+++ b/src/static/dashboard.html
@@ -647,7 +647,7 @@
     <script src="/static/js/components.js?v=20260427a"></script>
     <script src="/static/js/layout.js?v=20260316b"></script>
     <script src="/static/js/pipeline.js?v=20260501a"></script>
-    <script src="/static/js/app.js?v=20260501d"></script>
+    <script src="/static/js/app.js?v=20260501e"></script>
     <script src="/static/js/cluster-data.js?v=20260322f"></script>
     <script src="/static/js/tutorial.js?v=20260316z"></script>
     <script src="/static/js/chat.js?v=20260422a"></script>
diff --git a/src/static/js/app.js b/src/static/js/app.js
index d59ee90..a9e5b56 100644
--- a/src/static/js/app.js
+++ b/src/static/js/app.js
@@ -1298,7 +1298,8 @@ const App = {
             if (win && win.start === b.start && win.end === b.end) cls.push('active');
             const tip = `${b.label}: ${b.articles} Meldung${b.articles === 1 ? '' : 'en'}` +
                 (b.snapshots > 0 ? ` + ${b.snapshots} Lagebericht${b.snapshots === 1 ? '' : 'e'}` : '');
-            html += `<div class="${cls.join(' ')}" style="--intensity:${intensity.toFixed(3)};" title="${UI.escape(tip)}" onclick="App.openTimelineWindow(${b.start}, ${b.end}, ${UI.escape(JSON.stringify(b.label))})"></div>`;
+            // data-Attribute statt JSON-String im onclick-Inline (vermeidet Quote-Konflikte bei Labels mit Komma/Anführungszeichen)
+            html += `<div class="${cls.join(' ')}" style="--intensity:${intensity.toFixed(3)};" title="${UI.escape(tip)}" data-start="${b.start}" data-end="${b.end}" data-label="${UI.escape(b.label || '')}" onclick="App.handleStripClick(this)"></div>`;
         });
         html += '</div>';
 
@@ -1355,6 +1356,17 @@ const App = {
         this.rerenderTimeline();
     },
 
+    /** Robuster Click-Handler fuer Heatmap-Cells (vermeidet Quote-Konflikte). */
+    handleStripClick(el) {
+        if (!el) return;
+        const start = parseInt(el.dataset.start, 10);
+        const end = parseInt(el.dataset.end, 10);
+        const label = el.dataset.label || '';
+        if (!isNaN(start) && !isNaN(end)) {
+            this.openTimelineWindow(start, end, label);
+        }
+    },
+
     /** Klick auf Heatmap-Balken: Stream auf dieses Zeitfenster filtern.
      *  Zweiter Klick auf denselben Balken hebt den Filter auf.
      */