Auto-Reload: nur beim Seitenwechsel, nicht mitten in der Arbeit

frontend/src/App.jsx

@@ -2381,7 +2381,11 @@ export default function App() {
     return window.matchMedia('(display-mode: standalone)').matches && !sessionStorage.getItem('splash_shown');
   });
   const [user,setUser]=useState(null);
-  const [active,setActive]=useState('dashboard');
+  const [active,setActiveRaw]=useState('dashboard');
+  const setActive = (page) => {
+    import('./main.jsx').then(m => m.reloadIfNewBuild?.()).catch(()=>{});
+    setActiveRaw(page);
+  };
   const [toastMsg,setToastMsg]=useState({msg:'',type:'success'});
   const [updateInfo,setUpdateInfo]=useState(null);
   const [showUpd,setShowUpd]=useState(false);

frontend/src/main.jsx

@@ -2,43 +2,49 @@ import React from 'react'
 import ReactDOM from 'react-dom/client'
 import App from './App.jsx'
 
-// ── Service Worker registrieren + Auto-Reload bei neuem Build ─────────────────
+// ── Auto-Reload bei neuem Build – nur beim Seitenwechsel ─────────────────────
+const STORED_KEY = 'dd_build_time';
+let newBuildAvailable = false;
+
+async function checkBuildTime() {
+  try {
+    const r = await fetch('/api/build-time', { cache: 'no-store' });
+    const { buildTime } = await r.json();
+    const stored = localStorage.getItem(STORED_KEY);
+    if (!stored) {
+      localStorage.setItem(STORED_KEY, buildTime);
+    } else if (stored !== buildTime) {
+      localStorage.setItem(STORED_KEY, buildTime);
+      newBuildAvailable = true; // merken, aber noch nicht reloaden
+    }
+  } catch {}
+}
+
+// Alle 60s im Hintergrund prüfen
+checkBuildTime();
+setInterval(checkBuildTime, 60_000);
+
+// Reload-Funktion – wird vom App beim Seitenwechsel aufgerufen
+export function reloadIfNewBuild() {
+  if (newBuildAvailable) window.location.reload();
+}
+
+// ── Service Worker ────────────────────────────────────────────────────────────
 if ('serviceWorker' in navigator) {
   navigator.serviceWorker.register('/sw.js').then(reg => {
-    // Wenn ein neuer SW wartet: sofort übernehmen lassen
-    const takeOver = () => {
-      if (reg.waiting) {
-        reg.waiting.postMessage('SKIP_WAITING');
-      }
-    };
+    if (reg.waiting) reg.waiting.postMessage('SKIP_WAITING');
     reg.addEventListener('updatefound', () => {
-      const newWorker = reg.installing;
-      newWorker?.addEventListener('statechange', () => {
-        if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
-          takeOver();
+      const nw = reg.installing;
+      nw?.addEventListener('statechange', () => {
+        if (nw.state === 'installed' && navigator.serviceWorker.controller) {
+          nw.postMessage('SKIP_WAITING');
         }
       });
     });
-    // Wenn SW übernimmt → Seite neu laden
     navigator.serviceWorker.addEventListener('controllerchange', () => {
-      window.location.reload();
+      newBuildAvailable = true; // SW-Update → beim nächsten Wechsel laden
     });
   });
-
-  // Beim Start: Build-Zeit prüfen und bei neuer Version neu laden
-  const STORED_KEY = 'dd_build_time';
-  fetch('/api/build-time', { cache: 'no-store' })
-    .then(r => r.json())
-    .then(({ buildTime }) => {
-      const stored = localStorage.getItem(STORED_KEY);
-      if (stored && stored !== buildTime) {
-        localStorage.setItem(STORED_KEY, buildTime);
-        window.location.reload();
-      } else {
-        localStorage.setItem(STORED_KEY, buildTime);
-      }
-    })
-    .catch(() => {}); // offline – kein reload
 }
 
 ReactDOM.createRoot(document.getElementById('root')).render(