fix(i18n): Tab-Labels werden dynamisch ueberschrieben -- T() statt hardcode

LayoutManager.applyTypeLabels(layout.js:58-65) und App-Render
(app.js:1063,1081) ueberschreiben die Tab-Texte je nach Lage-Typ.
Beides nutzt jetzt T() mit DE-Fallback. Neue Keys tab.summary_short
und tab.summary_report. Cache-Buster layout.js + app.js gebumpt.

src/static/dashboard.html

@@ -727,9 +727,9 @@
     <script src="/static/js/api.js?v=20260423a"></script>
     <script src="/static/js/ws.js?v=20260316b"></script>
     <script src="/static/js/components.js?v=20260513d"></script>
-    <script src="/static/js/layout.js?v=20260316b"></script>
+    <script src="/static/js/layout.js?v=20260513f"></script>
     <script src="/static/js/pipeline.js?v=20260513d"></script>
-    <script src="/static/js/app.js?v=20260513e"></script>
+    <script src="/static/js/app.js?v=20260513f"></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>