diff --git a/src/App.js b/src/App.js
index 6b298d2..d17e8c1 100644
--- a/src/App.js
+++ b/src/App.js
@@ -7,6 +7,9 @@ import 'react-date-range/dist/theme/default.css';
 import { formatDateValue, formatRangeLabel } from './utils/dateUtils';
 import useSyncProgress from './hooks/useSyncProgress';
 import useNotificationSettings from './hooks/useNotificationSettings';
+import useConfigManager from './hooks/useConfigManager';
+import useStoreSync from './hooks/useStoreSync';
+import useDirtyNavigationGuard from './hooks/useDirtyNavigationGuard';
 import NavigationTabs from './components/NavigationTabs';
 import LoginView from './components/LoginView';
 import DashboardView from './components/DashboardView';
@@ -22,7 +25,6 @@ const TOKEN_STORAGE_KEY = 'pickupConfigToken';
 function App() {
   const [session, setSession] = useState(null);
   const [credentials, setCredentials] = useState({ email: '', password: '' });
-  const [config, setConfig] = useState([]);
   const [stores, setStores] = useState([]);
   const [loading, setLoading] = useState(false);
   const [status, setStatus] = useState('');
@@ -31,19 +33,10 @@ function App() {
   const [adminSettings, setAdminSettings] = useState(null);
   const [adminSettingsLoading, setAdminSettingsLoading] = useState(false);
   const [initializing, setInitializing] = useState(false);
-  const [isDirty, setIsDirty] = useState(false);
-  const [dirtyDialogOpen, setDirtyDialogOpen] = useState(false);
-  const [dirtyDialogMessage, setDirtyDialogMessage] = useState('');
-  const [pendingNavigation, setPendingNavigation] = useState(null);
-  const [dirtyDialogSaving, setDirtyDialogSaving] = useState(false);
-  const [confirmDialog, setConfirmDialog] = useState({ open: false, resolve: null });
   const [activeRangePicker, setActiveRangePicker] = useState(null);
+  const [confirmDialog, setConfirmDialog] = useState({ open: false, resolve: null });
   const [notificationPanelOpen, setNotificationPanelOpen] = useState(false);
   const [focusedStoreId, setFocusedStoreId] = useState(null);
-  const configRef = useRef(config);
-  useEffect(() => {
-    configRef.current = config;
-  }, [config]);
   const minSelectableDate = useMemo(() => startOfDay(new Date()), []);
 
   const weekdays = ['Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag', 'Sonntag'];
@@ -83,8 +76,6 @@ function App() {
       return normalized;
     });
   }, []);
-  const delay = useCallback((ms) => new Promise((resolve) => setTimeout(resolve, ms)), []);
-
   const {
     syncProgress,
     startSyncProgress,
@@ -126,6 +117,74 @@ function App() {
     };
   }, []);
 
+  const handleUnauthorizedRef = useRef(() => {});
+
+  const authorizedFetch = useCallback(
+    async (url, options = {}, tokenOverride) => {
+      const activeToken = tokenOverride || session?.token;
+      if (!activeToken) {
+        throw new Error('Keine aktive Session');
+      }
+      const headers = {
+        Authorization: `Bearer ${activeToken}`,
+        ...(options.headers || {})
+      };
+      const response = await fetch(url, { ...options, headers });
+      if (response.status === 401) {
+        handleUnauthorizedRef.current();
+        throw new Error('Nicht autorisiert');
+      }
+      return response;
+    },
+    [session?.token]
+  );
+
+  const {
+    config,
+    setConfig,
+    isDirty,
+    setIsDirty,
+    persistConfigUpdate,
+    saveConfig
+  } = useConfigManager({
+    sessionToken: session?.token,
+    authorizedFetch,
+    setStatus,
+    setError,
+    setLoading
+  });
+
+  const {
+    fetchConfig,
+    syncStoresWithProgress,
+    refreshStoresAndConfig
+  } = useStoreSync({
+    sessionToken: session?.token,
+    authorizedFetch,
+    setStatus,
+    setError,
+    setLoading,
+    setStores,
+    setConfig,
+    normalizeConfigEntries,
+    setIsDirty,
+    startSyncProgress,
+    updateSyncProgress,
+    finishSyncProgress
+  });
+
+  const {
+    requestNavigation,
+    dialogState: dirtyDialogState,
+    handleDirtySave,
+    handleDirtyDiscard,
+    handleDirtyCancel
+  } = useDirtyNavigationGuard({
+    isDirty,
+    saveConfig,
+    onDiscard: () => setIsDirty(false)
+  });
+
   const resetSessionState = useCallback(() => {
     setSession(null);
     setConfig([]);
@@ -136,7 +195,7 @@ function App() {
     setAdminSettingsLoading(false);
     setAvailableCollapsed(true);
     setInitializing(false);
-  }, []);
+  }, [setConfig]);
 
   const handleUnauthorized = useCallback(() => {
     resetSessionState();
@@ -147,6 +206,10 @@ function App() {
     }
   }, [resetSessionState]);
 
+  useEffect(() => {
+    handleUnauthorizedRef.current = handleUnauthorized;
+  }, [handleUnauthorized]);
+
   const bootstrapSession = useCallback(
     async (token, { progress } = {}) => {
       if (!token) {
@@ -197,27 +260,7 @@ function App() {
       }
       return {};
     },
-    [handleUnauthorized, normalizeAdminSettings, normalizeConfigEntries]
-  );
-
-  const authorizedFetch = useCallback(
-    async (url, options = {}, tokenOverride) => {
-      const activeToken = tokenOverride || session?.token;
-      if (!activeToken) {
-        throw new Error('Keine aktive Session');
-      }
-      const headers = {
-        Authorization: `Bearer ${activeToken}`,
-        ...(options.headers || {})
-      };
-      const response = await fetch(url, { ...options, headers });
-      if (response.status === 401) {
-        handleUnauthorized();
-        throw new Error('Nicht autorisiert');
-      }
-      return response;
-    },
-    [handleUnauthorized, session?.token]
+    [handleUnauthorized, normalizeAdminSettings, normalizeConfigEntries, setConfig]
   );
 
   const {
@@ -345,249 +388,6 @@ function App() {
     requestNavigation('dich abzumelden', performLogout);
   };
 
-  const fetchConfig = useCallback(async (tokenOverride, { silent = false } = {}) => {
-    const tokenToUse = tokenOverride || session?.token;
-    if (!tokenToUse) {
-      return;
-    }
-    if (!silent) {
-      setStatus('');
-    }
-    setLoading(true);
-    setError('');
-    try {
-      const response = await authorizedFetch('/api/config', {}, tokenToUse);
-      if (!response.ok) {
-        throw new Error(`HTTP ${response.status}`);
-      }
-      const data = await response.json();
-      setConfig(normalizeConfigEntries(Array.isArray(data) ? data : []));
-      if (!silent) {
-        setStatus('Konfiguration aktualisiert.');
-        setTimeout(() => setStatus(''), 3000);
-      }
-    } catch (err) {
-      setError(`Fehler beim Laden der Konfiguration: ${err.message}`);
-    } finally {
-      setLoading(false);
-    }
-  }, [session?.token, authorizedFetch, normalizeConfigEntries]);
-
-  const fetchStoresList = useCallback(async (tokenOverride, { silent = false } = {}) => {
-    const tokenToUse = tokenOverride || session?.token;
-    if (!tokenToUse) {
-      return;
-    }
-    if (!silent) {
-      setStatus('');
-    }
-    setError('');
-    try {
-      const response = await authorizedFetch('/api/stores', {}, tokenToUse);
-      if (!response.ok) {
-        throw new Error(`HTTP ${response.status}`);
-      }
-      const data = await response.json();
-      setStores(Array.isArray(data) ? data : []);
-      if (!silent) {
-        setStatus('Betriebe aktualisiert.');
-        setTimeout(() => setStatus(''), 3000);
-      }
-    } catch (err) {
-      setError(`Fehler beim Laden der Betriebe: ${err.message}`);
-    }
-  }, [session?.token, authorizedFetch]);
-
-  const syncStoresWithProgress = useCallback(
-    async ({ block = false, reason = 'manual', startJob = true, reuseOverlay = false, tokenOverride } = {}) => {
-      const effectiveToken = tokenOverride || session?.token;
-      if (!effectiveToken) {
-        return;
-      }
-      if (!reuseOverlay) {
-        startSyncProgress('Betriebe werden geprüft...', 5, block);
-      } else {
-        updateSyncProgress('Betriebe werden geprüft...', 35);
-      }
-      try {
-        let jobStarted = false;
-        const jobStartedAt = Date.now();
-        const triggerRefresh = async () => {
-          const response = await authorizedFetch('/api/stores/refresh', {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({ force: true, reason })
-          }, effectiveToken);
-          if (!response.ok) {
-            throw new Error(`HTTP ${response.status}`);
-          }
-          await response.json();
-          jobStarted = true;
-        };
-
-        if (startJob) {
-          await triggerRefresh();
-        }
-
-        let completed = false;
-        while (!completed) {
-          const statusResp = await authorizedFetch('/api/stores/refresh/status', {}, effectiveToken);
-          if (!statusResp.ok) {
-            throw new Error(`HTTP ${statusResp.status}`);
-          }
-          const statusData = await statusResp.json();
-          const job = statusData.job;
-          if (job?.status === 'running') {
-            const total = job.total || 0;
-            const processed = job.processed || 0;
-            let percent;
-            if (total > 0) {
-              const ratio = Math.max(0, Math.min(1, processed / total));
-              percent = Math.min(99, 5 + Math.round(ratio * 90));
-            }
-            let etaSeconds = null;
-            if (total > 0 && processed > 0) {
-              const elapsedSeconds = Math.max(1, (Date.now() - jobStartedAt) / 1000);
-              const rate = processed / elapsedSeconds;
-              if (rate > 0) {
-                const remaining = Math.max(0, total - processed);
-                etaSeconds = Math.round(remaining / rate);
-              }
-            }
-            const message = job.currentStore
-              ? `Prüfe ${job.currentStore} (${processed}/${total || '?'})`
-              : 'Betriebe werden geprüft...';
-            updateSyncProgress(message, percent, { etaSeconds });
-          } else if (!job) {
-            if (statusData.storesFresh) {
-              updateSyncProgress('Betriebe aktuell.', 99, { etaSeconds: null });
-              completed = true;
-            } else if (!jobStarted) {
-              await triggerRefresh();
-              await delay(500);
-            } else {
-              updateSyncProgress('Warte auf Rückmeldung...', undefined, { etaSeconds: null });
-            }
-          } else if (job.status === 'done') {
-            updateSyncProgress('Synchronisierung abgeschlossen', 100, { etaSeconds: null });
-            completed = true;
-          } else if (job.status === 'error') {
-            throw new Error(job.error || 'Unbekannter Fehler beim Prüfen der Betriebe.');
-          }
-          if (!completed) {
-            await delay(1000);
-          }
-        }
-
-        await fetchStoresList(effectiveToken, { silent: reason !== 'manual' });
-        await fetchConfig(effectiveToken, { silent: true });
-        setIsDirty(false);
-        setStatus('Betriebe aktualisiert.');
-        setTimeout(() => setStatus(''), 3000);
-      } catch (err) {
-        setError(`Aktualisieren der Betriebe fehlgeschlagen: ${err.message}`);
-      } finally {
-        if (!reuseOverlay) {
-          finishSyncProgress();
-        }
-      }
-    },
-    [
-      session?.token,
-      authorizedFetch,
-      startSyncProgress,
-      updateSyncProgress,
-      finishSyncProgress,
-      delay,
-      fetchStoresList,
-      fetchConfig,
-      setError,
-      setStatus
-    ]
-  );
-
-  const saveConfig = useCallback(async () => {
-    if (!session?.token) {
-      return false;
-    }
-    setStatus('Speichere...');
-    setError('');
-    try {
-      const response = await authorizedFetch('/api/config', {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify(config)
-      });
-      if (!response.ok) {
-        throw new Error(`HTTP ${response.status}`);
-      }
-      const result = await response.json();
-      if (result.success) {
-        setStatus('Konfiguration erfolgreich gespeichert!');
-        setTimeout(() => setStatus(''), 3000);
-        setIsDirty(false);
-        return true;
-      }
-      throw new Error(result.error || 'Unbekannter Fehler beim Speichern');
-    } catch (err) {
-      setError(`Fehler beim Speichern: ${err.message}`);
-      setStatus('');
-      return false;
-    } finally {
-      setLoading(false);
-    }
-  }, [session?.token, authorizedFetch, config]);
-
-  const refreshStoresAndConfig = useCallback(
-    ({ block = false } = {}) => syncStoresWithProgress({ block, reason: 'manual', startJob: true }),
-    [syncStoresWithProgress]
-  );
-
-  const requestNavigation = useCallback(
-    (message, action) => {
-      if (!isDirty) {
-        action();
-        return;
-      }
-      setDirtyDialogMessage(message || 'Änderungen wurden noch nicht gespeichert.');
-      setPendingNavigation(() => action);
-      setDirtyDialogOpen(true);
-    },
-    [isDirty]
-  );
-
-  const handleDirtySave = useCallback(async () => {
-    if (!pendingNavigation) {
-      setDirtyDialogOpen(false);
-      return;
-    }
-    setDirtyDialogSaving(true);
-    const success = await saveConfig();
-    setDirtyDialogSaving(false);
-    if (!success) {
-      return;
-    }
-    const action = pendingNavigation;
-    setPendingNavigation(null);
-    setDirtyDialogOpen(false);
-    action();
-  }, [pendingNavigation, saveConfig]);
-
-  const handleDirtyDiscard = useCallback(() => {
-    const action = pendingNavigation;
-    setPendingNavigation(null);
-    setDirtyDialogOpen(false);
-    setIsDirty(false);
-    if (action) {
-      action();
-    }
-  }, [pendingNavigation]);
-
-  const handleDirtyCancel = useCallback(() => {
-    setDirtyDialogOpen(false);
-    setPendingNavigation(null);
-  }, []);
-
   const askConfirmation = useCallback(
     (options = {}) =>
       new Promise((resolve) => {
@@ -685,50 +485,6 @@ function App() {
     };
   }, [isDirty]);
 
-  const persistConfigUpdate = useCallback(
-    async (updater, successMessage, { autoCommit = false } = {}) => {
-      const baseConfig = configRef.current;
-      const nextConfigState = typeof updater === 'function' ? updater(baseConfig) : updater;
-      if (!nextConfigState) {
-        return;
-      }
-      setConfig(nextConfigState);
-      if (!session?.token) {
-        setIsDirty(true);
-        return;
-      }
-      if (!autoCommit) {
-        setIsDirty(true);
-      }
-      setStatus('Speichere...');
-      setError('');
-      try {
-        const response = await authorizedFetch('/api/config', {
-          method: 'POST',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify(nextConfigState)
-        });
-        if (!response.ok) {
-          throw new Error(`HTTP ${response.status}`);
-        }
-        const result = await response.json();
-        if (!result.success) {
-          throw new Error(result.error || 'Unbekannter Fehler beim Speichern');
-        }
-        const message = successMessage || 'Konfiguration gespeichert.';
-        setStatus(message);
-        setTimeout(() => setStatus(''), 3000);
-        setIsDirty(false);
-      } catch (err) {
-        setError(`Fehler beim Speichern: ${err.message}`);
-        if (autoCommit) {
-          setIsDirty(true);
-        }
-      }
-    },
-    [authorizedFetch, session?.token]
-  );
-
   const deleteEntry = async (entryId) => {
     const confirmed = await askConfirmation({
       title: 'Eintrag löschen',
@@ -1204,12 +960,12 @@ function App() {
         </div>
         <StoreSyncOverlay state={syncProgress} />
         <DirtyNavigationDialog
-          open={dirtyDialogOpen}
-          message={dirtyDialogMessage}
+          open={dirtyDialogState.open}
+          message={dirtyDialogState.message}
           onSave={handleDirtySave}
           onDiscard={handleDirtyDiscard}
           onCancel={handleDirtyCancel}
-          saving={dirtyDialogSaving}
+          saving={dirtyDialogState.saving}
         />
         <ConfirmationDialog
           open={!!confirmDialog.open}
diff --git a/src/hooks/useConfigManager.js b/src/hooks/useConfigManager.js
new file mode 100644
index 0000000..42c59bd
--- /dev/null
+++ b/src/hooks/useConfigManager.js
@@ -0,0 +1,100 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+
+const CONFIG_ENDPOINT = '/api/config';
+
+const useConfigManager = ({ sessionToken, authorizedFetch, setStatus, setError, setLoading }) => {
+  const [config, setConfig] = useState([]);
+  const [isDirty, setIsDirty] = useState(false);
+  const configRef = useRef(config);
+
+  useEffect(() => {
+    configRef.current = config;
+  }, [config]);
+
+  const persistConfigUpdate = useCallback(
+    async (updater, successMessage, { autoCommit = false } = {}) => {
+      const baseConfig = configRef.current;
+      const nextConfigState = typeof updater === 'function' ? updater(baseConfig) : updater;
+      if (!nextConfigState) {
+        return;
+      }
+      setConfig(nextConfigState);
+      if (!sessionToken) {
+        setIsDirty(true);
+        return;
+      }
+      if (!autoCommit) {
+        setIsDirty(true);
+      }
+      setStatus('Speichere...');
+      setError('');
+      try {
+        const response = await authorizedFetch(CONFIG_ENDPOINT, {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify(nextConfigState)
+        });
+        if (!response.ok) {
+          throw new Error(`HTTP ${response.status}`);
+        }
+        const result = await response.json();
+        if (!result.success) {
+          throw new Error(result.error || 'Unbekannter Fehler beim Speichern');
+        }
+        setStatus(successMessage || 'Konfiguration gespeichert.');
+        setTimeout(() => setStatus(''), 3000);
+        setIsDirty(false);
+      } catch (error) {
+        setError(`Fehler beim Speichern: ${error.message}`);
+        if (autoCommit) {
+          setIsDirty(true);
+        }
+      }
+    },
+    [authorizedFetch, sessionToken, setError, setStatus]
+  );
+
+  const saveConfig = useCallback(async () => {
+    if (!sessionToken) {
+      return false;
+    }
+    setStatus('Speichere...');
+    setError('');
+    setLoading(true);
+    try {
+      const response = await authorizedFetch(CONFIG_ENDPOINT, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(configRef.current)
+      });
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}`);
+      }
+      const result = await response.json();
+      if (!result.success) {
+        throw new Error(result.error || 'Unbekannter Fehler beim Speichern');
+      }
+      setStatus('Konfiguration erfolgreich gespeichert!');
+      setTimeout(() => setStatus(''), 3000);
+      setIsDirty(false);
+      return true;
+    } catch (error) {
+      setError(`Fehler beim Speichern: ${error.message}`);
+      setStatus('');
+      return false;
+    } finally {
+      setLoading(false);
+    }
+  }, [authorizedFetch, sessionToken, setError, setLoading, setStatus]);
+
+  return {
+    config,
+    setConfig,
+    isDirty,
+    setIsDirty,
+    persistConfigUpdate,
+    saveConfig
+  };
+};
+
+export default useConfigManager;
diff --git a/src/hooks/useDirtyNavigationGuard.js b/src/hooks/useDirtyNavigationGuard.js
new file mode 100644
index 0000000..3f15ac3
--- /dev/null
+++ b/src/hooks/useDirtyNavigationGuard.js
@@ -0,0 +1,69 @@
+import { useCallback, useState } from 'react';
+
+const DEFAULT_MESSAGE = 'Änderungen wurden noch nicht gespeichert.';
+
+const useDirtyNavigationGuard = ({ isDirty, saveConfig, onDiscard }) => {
+  const [dialogOpen, setDialogOpen] = useState(false);
+  const [dialogMessage, setDialogMessage] = useState(DEFAULT_MESSAGE);
+  const [dialogSaving, setDialogSaving] = useState(false);
+  const [pendingNavigation, setPendingNavigation] = useState(null);
+
+  const requestNavigation = useCallback(
+    (message, action = () => {}) => {
+      if (!isDirty) {
+        action();
+        return;
+      }
+      setDialogMessage(message || DEFAULT_MESSAGE);
+      setPendingNavigation(() => action);
+      setDialogOpen(true);
+    },
+    [isDirty]
+  );
+
+  const handleDirtySave = useCallback(async () => {
+    if (!pendingNavigation) {
+      setDialogOpen(false);
+      return;
+    }
+    setDialogSaving(true);
+    const success = await saveConfig();
+    setDialogSaving(false);
+    if (!success) {
+      return;
+    }
+    const action = pendingNavigation;
+    setPendingNavigation(null);
+    setDialogOpen(false);
+    action();
+  }, [pendingNavigation, saveConfig]);
+
+  const handleDirtyDiscard = useCallback(() => {
+    const action = pendingNavigation;
+    setPendingNavigation(null);
+    setDialogOpen(false);
+    onDiscard?.();
+    if (action) {
+      action();
+    }
+  }, [pendingNavigation, onDiscard]);
+
+  const handleDirtyCancel = useCallback(() => {
+    setDialogOpen(false);
+    setPendingNavigation(null);
+  }, []);
+
+  return {
+    requestNavigation,
+    dialogState: {
+      open: dialogOpen,
+      message: dialogMessage,
+      saving: dialogSaving
+    },
+    handleDirtySave,
+    handleDirtyDiscard,
+    handleDirtyCancel
+  };
+};
+
+export default useDirtyNavigationGuard;
diff --git a/src/hooks/useStoreSync.js b/src/hooks/useStoreSync.js
new file mode 100644
index 0000000..33f5d1e
--- /dev/null
+++ b/src/hooks/useStoreSync.js
@@ -0,0 +1,204 @@
+import { useCallback } from 'react';
+
+const useStoreSync = ({
+  sessionToken,
+  authorizedFetch,
+  setStatus,
+  setError,
+  setLoading,
+  setStores,
+  setConfig,
+  normalizeConfigEntries,
+  setIsDirty,
+  startSyncProgress,
+  updateSyncProgress,
+  finishSyncProgress
+}) => {
+  const delay = useCallback((ms) => new Promise((resolve) => setTimeout(resolve, ms)), []);
+
+  const fetchConfig = useCallback(
+    async (tokenOverride, { silent = false } = {}) => {
+      const tokenToUse = tokenOverride || sessionToken;
+      if (!tokenToUse) {
+        return;
+      }
+      if (!silent) {
+        setStatus('');
+      }
+      setLoading(true);
+      setError('');
+      try {
+        const response = await authorizedFetch('/api/config', {}, tokenToUse);
+        if (!response.ok) {
+          throw new Error(`HTTP ${response.status}`);
+        }
+        const data = await response.json();
+        setConfig(normalizeConfigEntries(Array.isArray(data) ? data : []));
+        if (!silent) {
+          setStatus('Konfiguration aktualisiert.');
+          setTimeout(() => setStatus(''), 3000);
+        }
+      } catch (err) {
+        setError(`Fehler beim Laden der Konfiguration: ${err.message}`);
+      } finally {
+        setLoading(false);
+      }
+    },
+    [sessionToken, authorizedFetch, setStatus, setLoading, setError, setConfig, normalizeConfigEntries]
+  );
+
+  const fetchStoresList = useCallback(
+    async (tokenOverride, { silent = false } = {}) => {
+      const tokenToUse = tokenOverride || sessionToken;
+      if (!tokenToUse) {
+        return;
+      }
+      if (!silent) {
+        setStatus('');
+      }
+      setError('');
+      try {
+        const response = await authorizedFetch('/api/stores', {}, tokenToUse);
+        if (!response.ok) {
+          throw new Error(`HTTP ${response.status}`);
+        }
+        const data = await response.json();
+        setStores(Array.isArray(data) ? data : []);
+        if (!silent) {
+          setStatus('Betriebe aktualisiert.');
+          setTimeout(() => setStatus(''), 3000);
+        }
+      } catch (err) {
+        setError(`Fehler beim Laden der Betriebe: ${err.message}`);
+      }
+    },
+    [sessionToken, authorizedFetch, setStatus, setError, setStores]
+  );
+
+  const syncStoresWithProgress = useCallback(
+    async ({ block = false, reason = 'manual', startJob = true, reuseOverlay = false, tokenOverride } = {}) => {
+      const effectiveToken = tokenOverride || sessionToken;
+      if (!effectiveToken) {
+        return;
+      }
+      if (!reuseOverlay) {
+        startSyncProgress('Betriebe werden geprüft...', 5, block);
+      } else {
+        updateSyncProgress('Betriebe werden geprüft...', 35);
+      }
+      try {
+        let jobStarted = false;
+        const jobStartedAt = Date.now();
+        const triggerRefresh = async () => {
+          const response = await authorizedFetch(
+            '/api/stores/refresh',
+            {
+              method: 'POST',
+              headers: { 'Content-Type': 'application/json' },
+              body: JSON.stringify({ force: true, reason })
+            },
+            effectiveToken
+          );
+          if (!response.ok) {
+            throw new Error(`HTTP ${response.status}`);
+          }
+          await response.json();
+          jobStarted = true;
+        };
+
+        if (startJob) {
+          await triggerRefresh();
+        }
+
+        let completed = false;
+        while (!completed) {
+          const statusResp = await authorizedFetch('/api/stores/refresh/status', {}, effectiveToken);
+          if (!statusResp.ok) {
+            throw new Error(`HTTP ${statusResp.status}`);
+          }
+          const statusData = await statusResp.json();
+          const job = statusData.job;
+          if (job?.status === 'running') {
+            const total = job.total || 0;
+            const processed = job.processed || 0;
+            let percent;
+            if (total > 0) {
+              const ratio = Math.max(0, Math.min(1, processed / total));
+              percent = Math.min(99, 5 + Math.round(ratio * 90));
+            }
+            let etaSeconds = null;
+            if (total > 0 && processed > 0) {
+              const elapsedSeconds = Math.max(1, (Date.now() - jobStartedAt) / 1000);
+              const rate = processed / elapsedSeconds;
+              if (rate > 0) {
+                const remaining = Math.max(0, total - processed);
+                etaSeconds = Math.round(remaining / rate);
+              }
+            }
+            const message = job.currentStore
+              ? `Prüfe ${job.currentStore} (${processed}/${total || '?'})`
+              : 'Betriebe werden geprüft...';
+            updateSyncProgress(message, percent, { etaSeconds });
+          } else if (!job) {
+            if (statusData.storesFresh) {
+              updateSyncProgress('Betriebe aktuell.', 99, { etaSeconds: null });
+              completed = true;
+            } else if (!jobStarted) {
+              await triggerRefresh();
+              await delay(500);
+            } else {
+              updateSyncProgress('Warte auf Rückmeldung...', undefined, { etaSeconds: null });
+            }
+          } else if (job.status === 'done') {
+            updateSyncProgress('Synchronisierung abgeschlossen', 100, { etaSeconds: null });
+            completed = true;
+          } else if (job.status === 'error') {
+            throw new Error(job.error || 'Unbekannter Fehler beim Prüfen der Betriebe.');
+          }
+          if (!completed) {
+            await delay(1000);
+          }
+        }
+
+        await fetchStoresList(effectiveToken, { silent: reason !== 'manual' });
+        await fetchConfig(effectiveToken, { silent: true });
+        setIsDirty(false);
+        setStatus('Betriebe aktualisiert.');
+        setTimeout(() => setStatus(''), 3000);
+      } catch (err) {
+        setError(`Aktualisieren der Betriebe fehlgeschlagen: ${err.message}`);
+      } finally {
+        if (!reuseOverlay) {
+          finishSyncProgress();
+        }
+      }
+    },
+    [
+      sessionToken,
+      authorizedFetch,
+      startSyncProgress,
+      updateSyncProgress,
+      finishSyncProgress,
+      delay,
+      fetchStoresList,
+      fetchConfig,
+      setIsDirty,
+      setStatus,
+      setError
+    ]
+  );
+
+  const refreshStoresAndConfig = useCallback(
+    ({ block = false } = {}) => syncStoresWithProgress({ block, reason: 'manual', startJob: true }),
+    [syncStoresWithProgress]
+  );
+
+  return {
+    fetchConfig,
+    fetchStoresList,
+    syncStoresWithProgress,
+    refreshStoresAndConfig
+  };
+};
+
+export default useStoreSync;