feat: add logout button to sidebar

frontend/src/components/panels/Sidebar.tsx

@@ -1,8 +1,9 @@
 import { useState, useCallback, useEffect, useRef } from 'react'
-import { Plus, Save, ScanLine, ChevronLeft, ChevronRight, LayoutDashboard, Clock, EyeOff, Trash2, RefreshCw, Loader2, Square, Eye, Settings, StopCircle, X } from 'lucide-react'
+import { Plus, Save, ScanLine, ChevronLeft, ChevronRight, LayoutDashboard, Clock, EyeOff, Trash2, RefreshCw, Loader2, Square, Eye, Settings, StopCircle, X, LogOut } from 'lucide-react'
 import { Logo } from '@/components/ui/Logo'
 import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip'
 import { useCanvasStore } from '@/stores/canvasStore'
+import { useAuthStore } from '@/stores/authStore'
 import { scanApi, settingsApi } from '@/api/client'
 import { toast } from 'sonner'
 import { useLatestRelease } from '@/hooks/useLatestRelease'
@@ -43,6 +44,7 @@ interface SidebarProps {
 export function Sidebar({ onAddNode, onAddGroupRect, onScan, onSave, onNodeApproved, forceView, highlightPendingId }: SidebarProps) {
   const [_collapsed, setCollapsed] = useState(false)
   const [_activeView, setActiveView] = useState<SidebarView>('canvas')
+  const logout = useAuthStore((s) => s.logout)
 
   // When forceView is set, override local state without useEffect
   const collapsed = forceView ? false : _collapsed
@@ -152,6 +154,14 @@ export function Sidebar({ onAddNode, onAddGroupRect, onScan, onSave, onNodeAppro
             onClick={() => setActiveView((v) => v === 'settings' ? 'canvas' : 'settings')}
           />
         )}
+        {!STANDALONE && (
+          <SidebarItem
+            icon={LogOut}
+            label="Logout"
+            collapsed={collapsed}
+            onClick={logout}
+          />
+        )}
       </div>
 
       {!collapsed && <VersionBadge />}

frontend/src/components/panels/__tests__/Sidebar.test.tsx

@@ -2,12 +2,14 @@ import { describe, it, expect, beforeEach, vi } from 'vitest'
 import { render, screen, fireEvent, waitFor } from '@testing-library/react'
 import { Sidebar } from '../Sidebar'
 import { useCanvasStore } from '@/stores/canvasStore'
+import { useAuthStore } from '@/stores/authStore'
 import type { Node } from '@xyflow/react'
 import type { NodeData } from '@/types'
 
 // ── Mocks ────────────────────────────────────────────────────────────────────
 
 vi.mock('@/stores/canvasStore')
+vi.mock('@/stores/authStore')
 
 const mockBulkApprove = vi.fn()
 const mockBulkHide = vi.fn()
@@ -60,6 +62,7 @@ const makeNode = (id: string, status: NodeData['status'], type: NodeData['type']
 })
 
 const mockToggleHideIp = vi.fn()
+const mockLogout = vi.fn()
 
 function mockStore(overrides: Partial<ReturnType<typeof useCanvasStore>> = {}) {
   vi.mocked(useCanvasStore).mockReturnValue({
@@ -73,6 +76,12 @@ function mockStore(overrides: Partial<ReturnType<typeof useCanvasStore>> = {}) {
   } as ReturnType<typeof useCanvasStore>)
 }
 
+function mockAuth() {
+  vi.mocked(useAuthStore).mockImplementation((selector: (s: { logout: () => void }) => unknown) =>
+    selector({ logout: mockLogout }) as ReturnType<typeof useAuthStore>
+  )
+}
+
 const defaultProps = {
   onAddNode: vi.fn(),
   onAddGroupRect: vi.fn(),
@@ -86,6 +95,7 @@ const defaultProps = {
 describe('Sidebar', () => {
   beforeEach(() => {
     mockStore()
+    mockAuth()
     vi.clearAllMocks()
   })
 
@@ -267,6 +277,19 @@ describe('Sidebar', () => {
     fireEvent.click(screen.getByRole('button', { name: 'Settings' }))
     expect(screen.queryByText('Status check interval (s)')).not.toBeInTheDocument()
   })
+
+  // ── Logout ─────────────────────────────────────────────────────────────────
+
+  it('shows Logout button in normal mode', () => {
+    render(<Sidebar {...defaultProps} />)
+    expect(screen.getByText('Logout')).toBeInTheDocument()
+  })
+
+  it('calls logout when Logout is clicked', () => {
+    render(<Sidebar {...defaultProps} />)
+    fireEvent.click(screen.getByText('Logout'))
+    expect(mockLogout).toHaveBeenCalledOnce()
+  })
 })
 
 // ── PendingDevicesPanel — bulk select ─────────────────────────────────────────
@@ -298,6 +321,7 @@ const DEVICE_B = {
 describe('PendingDevicesPanel — bulk select', () => {
   beforeEach(() => {
     mockStore()
+    mockAuth()
     vi.clearAllMocks()
     mockBulkApprove.mockResolvedValue({
       data: { approved: 2, node_ids: ['n1', 'n2'], device_ids: ['dev-a', 'dev-b'], skipped: 0 },