fix: handle expired JWT/token by forcing logout and redirecting to login view with expired message

frontend/src/App.jsx

@@ -108,12 +108,18 @@ const App = () => {
     }
   };
 
-  const handleLogout = () => {
+  const handleLogout = (message = '') => {
     setToken('');
     setUsername('');
     localStorage.removeItem('token');
     localStorage.removeItem('username');
+    if (message) {
+      setLoginError(message);
+      setActiveView('login');
+    } else {
+      setLoginError('');
       setActiveView('directory');
+    }
   };
 
   // Client-side search and filtering
@@ -199,7 +205,7 @@ const App = () => {
                   Справочник
                 </button>
               ) : (
-                <button className="btn btn-secondary" onClick={() => setActiveView('login')} style={{ display: 'flex', gap: '0.4rem' }}>
+                <button className="btn btn-secondary" onClick={() => { setLoginError(''); setActiveView('login'); }} style={{ display: 'flex', gap: '0.4rem' }}>
                   <LoginIcon style={{ width: '1.1rem', height: '1.1rem' }} /> Войти
                 </button>
               )
@@ -290,6 +296,7 @@ const App = () => {
             departments={departments}
             companies={companies}
             onRefreshData={fetchData}
+            onLogout={handleLogout}
           />
         )}
       </main>

frontend/src/components/AdminPanel.jsx

@@ -2,7 +2,7 @@ import React, { useState } from 'react';
 import { PlusIcon, EditIcon, DeleteIcon, CloseIcon, PhoneIcon, EmailIcon } from '../utils/svgs';
 import ImportExport from './ImportExport';
 
-const AdminPanel = ({ token, employees, departments, companies, onRefreshData }) => {
+const AdminPanel = ({ token, employees, departments, companies, onRefreshData, onLogout }) => {
   const [activeTab, setActiveTab] = useState('employees'); // 'employees', 'departments', 'companies', 'import-export'
   const [showEmpModal, setShowEmpModal] = useState(false);
   const [editingEmp, setEditingEmp] = useState(null);
@@ -57,6 +57,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         },
         body: JSON.stringify({ name: editingCompanyName.trim() })
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       const data = await res.json();
       
       if (res.ok) {
@@ -84,6 +88,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         },
         body: JSON.stringify({ name: editingDeptName.trim() })
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       const data = await res.json();
       
       if (res.ok) {
@@ -115,6 +123,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         },
         body: JSON.stringify({ name: newDeptName.trim() })
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       const data = await res.json();
       
       if (res.ok) {
@@ -139,7 +151,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         method: 'DELETE',
         headers: { 'Authorization': `Bearer ${token}` }
       });
-      
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       if (res.ok) {
         onRefreshData();
         showAlert('success', 'Подразделение удалено!');
@@ -167,6 +182,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         },
         body: JSON.stringify({ name: newCompanyName.trim() })
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       const data = await res.json();
       
       if (res.ok) {
@@ -191,7 +210,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         method: 'DELETE',
         headers: { 'Authorization': `Bearer ${token}` }
       });
-      
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       if (res.ok) {
         onRefreshData();
         showAlert('success', 'Компания удалена!');
@@ -268,6 +290,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         },
         body: JSON.stringify(employeePayload)
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
 
       const data = await res.json();
       if (res.ok) {
@@ -292,6 +318,10 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
         method: 'DELETE',
         headers: { 'Authorization': `Bearer ${token}` }
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
 
       if (res.ok) {
         onRefreshData();
@@ -705,7 +735,7 @@ const AdminPanel = ({ token, employees, departments, companies, onRefreshData })
       {/* Tab: Import/Export */}
       {/* ---------------------------------------------------- */}
       {activeTab === 'import-export' && (
-        <ImportExport token={token} onRefreshData={onRefreshData} />
+        <ImportExport token={token} onRefreshData={onRefreshData} onLogout={onLogout} />
       )}
 
       {/* ---------------------------------------------------- */}

frontend/src/components/ImportExport.jsx

@@ -1,7 +1,7 @@
 import React, { useState, useRef } from 'react';
 import { DownloadIcon, UploadIcon } from '../utils/svgs';
 
-const ImportExport = ({ token, onRefreshData }) => {
+const ImportExport = ({ token, onRefreshData, onLogout }) => {
   const [dragActive, setDragActive] = useState(false);
   const [status, setStatus] = useState({ type: '', message: '' });
   const fileInputRef = useRef(null);
@@ -130,6 +130,11 @@ const ImportExport = ({ token, onRefreshData }) => {
           body: JSON.stringify(payload)
         });
 
+        if (res.status === 401 || res.status === 403) {
+          onLogout('Сессия истекла, войдите заново');
+          return;
+        }
+
         const data = await res.json();
         if (res.ok) {
           setStatus({ type: 'success', message: `Импорт завершен! Загружено компаний: ${payload.companies.length}, отделов: ${payload.departments.length}, сотрудников: ${payload.employees.length}` });
@@ -151,6 +156,10 @@ const ImportExport = ({ token, onRefreshData }) => {
       const res = await fetch('/api/admin/export', {
         headers: { 'Authorization': `Bearer ${token}` }
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       if (!res.ok) throw new Error('Ошибка экспорта данных с сервера');
       const data = await res.json();
 
@@ -173,6 +182,10 @@ const ImportExport = ({ token, onRefreshData }) => {
       const res = await fetch('/api/admin/export', {
         headers: { 'Authorization': `Bearer ${token}` }
       });
+      if (res.status === 401 || res.status === 403) {
+        onLogout('Сессия истекла, войдите заново');
+        return;
+      }
       if (!res.ok) throw new Error('Ошибка экспорта данных с сервера');
       const data = await res.json();