feat: add in-app admin navigation for whitelisted users

Detect admin access after login and expose a header button that opens /admin via client-side routing so the session stays unlocked when returning to the app.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/App.tsx

@@ -50,6 +50,8 @@ import { Ship, LogOut, ChevronLeft, Users, FileText, Settings, Wifi, WifiOff, La
 import DisclaimerHeaderButton from './components/DisclaimerHeaderButton.tsx'
 import FeedbackHeaderButton from './components/FeedbackHeaderButton.tsx'
 import ProfileHeaderButton from './components/ProfileHeaderButton.tsx'
+import AdminHeaderButton from './components/AdminHeaderButton.tsx'
+import { checkAdminAccess } from './services/adminApi.js'
 import { useTranslation } from 'react-i18next'
 import { cycleAppLanguage } from './utils/i18nLanguages.js'
 import {
@@ -94,6 +96,7 @@ function App() {
   // Public demo mode (no account required)
   const [isDemoMode, setIsDemoMode] = useState(() => window.location.pathname === '/demo')
   const [isAdminRoute, setIsAdminRoute] = useState(() => window.location.pathname.startsWith('/admin'))
+  const [isAdminUser, setIsAdminUser] = useState(false)
 
   const syncQueueCount = useLiveQuery(
     () => activeLogbookId ? db.syncQueue.where({ logbookId: activeLogbookId }).count() : db.syncQueue.count(),
@@ -162,14 +165,23 @@ function App() {
     })
   }, [])
 
+  const refreshAdminAccess = useCallback(async () => {
+    const isAdmin = await checkAdminAccess()
+    setIsAdminUser(isAdmin)
+  }, [])
+
   useEffect(() => {
-    if (!isAuthenticated) return
+    if (!isAuthenticated) {
+      setIsAdminUser(false)
+      return
+    }
     const userId = localStorage.getItem('active_userid')
     if (!userId) return
     void syncAppearancePrefs(userId)
     void migrateLegacyCrewToPoolIfNeeded().then(() => syncPersonPool())
     void migrateLegacyYachtsToPoolIfNeeded().then(() => syncVesselPool())
-  }, [isAuthenticated])
+    void refreshAdminAccess()
+  }, [isAuthenticated, refreshAdminAccess])
 
   useEffect(() => {
     const handleOnline = () => {
@@ -249,6 +261,7 @@ function App() {
 
   const clearAuthenticatedAppState = useCallback(() => {
     setIsAuthenticated(false)
+    setIsAdminUser(false)
     setActiveLogbookId(null)
     setActiveLogbookTitle(null)
     setShowUserProfile(false)
@@ -343,6 +356,14 @@ function App() {
     setIsAcceptingInvite(false)
   }, [])
 
+  const openAdmin = useCallback(() => {
+    window.history.pushState({}, document.title, '/admin')
+    setIsAdminRoute(true)
+    setIsDemoMode(false)
+    setIsViewerMode(false)
+    setIsAcceptingInvite(false)
+  }, [])
+
   const selectLogbook = useCallback((id: string, title: string) => {
     setActiveLogbookId(id)
     setActiveLogbookTitle(title)
@@ -507,6 +528,7 @@ function App() {
     if (!(await confirmLeave())) return
     void logoutUser()
     setIsAuthenticated(false)
+    setIsAdminUser(false)
     setActiveLogbookId(null)
     setActiveLogbookTitle(null)
     setShowUserProfile(false)
@@ -621,6 +643,7 @@ function App() {
           onSelectLogbook={selectLogbook}
           onLogout={handleLogout}
           onOpenProfile={() => setShowUserProfile(true)}
+          onOpenAdmin={isAdminUser ? openAdmin : undefined}
         />
       </div>
     )
@@ -671,6 +694,8 @@ function App() {
               <Languages size={18} />
             </button>
 
+            {isAdminUser && <AdminHeaderButton onClick={openAdmin} />}
+
             <ProfileHeaderButton onClick={() => setShowUserProfile(true)} />
 
             <DisclaimerHeaderButton />

client/src/components/AdminHeaderButton.tsx

@@ -0,0 +1,23 @@
+import { useTranslation } from 'react-i18next'
+import { LayoutDashboard } from 'lucide-react'
+
+interface AdminHeaderButtonProps {
+  onClick: () => void
+}
+
+export default function AdminHeaderButton({ onClick }: AdminHeaderButtonProps) {
+  const { t } = useTranslation()
+
+  return (
+    <button
+      type="button"
+      className="btn-icon skipper-badge"
+      onClick={onClick}
+      title={t('nav.admin')}
+      aria-label={t('nav.admin')}
+    >
+      <LayoutDashboard size={18} aria-hidden="true" />
+      <span className="skipper-badge__name">{t('nav.admin')}</span>
+    </button>
+  )
+}

client/src/components/LogbookDashboard.tsx

@@ -15,11 +15,13 @@ import { BookOpen, Plus, Trash2, LogOut, Languages, RefreshCw, Ship, Wifi, WifiO
 import DisclaimerHeaderButton from './DisclaimerHeaderButton.tsx'
 import FeedbackHeaderButton from './FeedbackHeaderButton.tsx'
 import ProfileHeaderButton from './ProfileHeaderButton.tsx'
+import AdminHeaderButton from './AdminHeaderButton.tsx'
 
 interface LogbookDashboardProps {
   onSelectLogbook: (id: string, title: string) => void
   onLogout: () => void
   onOpenProfile: () => void
+  onOpenAdmin?: () => void
 }
 
 type LogbookSortKey = 'name' | 'date'
@@ -42,7 +44,7 @@ function sortLogbooks(
   return sorted
 }
 
-export default function LogbookDashboard({ onSelectLogbook, onLogout, onOpenProfile }: LogbookDashboardProps) {
+export default function LogbookDashboard({ onSelectLogbook, onLogout, onOpenProfile, onOpenAdmin }: LogbookDashboardProps) {
   const { t, i18n } = useTranslation()
   const { showConfirm } = useDialog()
   const [logbooks, setLogbooks] = useState<DecryptedLogbook[]>([])
@@ -388,6 +390,8 @@ export default function LogbookDashboard({ onSelectLogbook, onLogout, onOpenProf
 
           <ProfileHeaderButton onClick={onOpenProfile} />
 
+          {onOpenAdmin && <AdminHeaderButton onClick={onOpenAdmin} />}
+
           {/* Lang toggle */}
           <button className="btn-icon" onClick={toggleLanguage} title="Switch Language">
             <Languages size={18} />

client/src/i18n/locales/da.json

@@ -43,7 +43,8 @@
       "deviation": "Tabel over distraktioner",
       "logs": "Indlæg i logbogen",
       "stats": "Statistik",
-      "settings": "Indstillinger"
+      "settings": "Indstillinger",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Velkommen til Kapteins Daagbok.",

client/src/i18n/locales/de.json

@@ -43,7 +43,8 @@
       "deviation": "Ablenkungstabelle",
       "logs": "Logbucheinträge",
       "stats": "Statistik",
-      "settings": "Einstellungen"
+      "settings": "Einstellungen",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Willkommen bei Kapteins Daagbok",

client/src/i18n/locales/en.json

@@ -43,7 +43,8 @@
       "deviation": "Deviation Table",
       "logs": "Logbook Entries",
       "stats": "Statistics",
-      "settings": "Settings"
+      "settings": "Settings",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Welcome to Kapteins Daagbok",

client/src/i18n/locales/nb.json

@@ -43,7 +43,8 @@
       "deviation": "Tabell over distraksjoner",
       "logs": "Loggbokoppføringer",
       "stats": "Statistikk",
-      "settings": "Innstillinger"
+      "settings": "Innstillinger",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Velkommen til Kapteins Daagbok",

client/src/i18n/locales/sv.json

@@ -43,7 +43,8 @@
       "deviation": "Distraktionsbord",
       "logs": "Loggboksanteckningar",
       "stats": "Statistik",
-      "settings": "Inställningar"
+      "settings": "Inställningar",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Välkommen till Kapteins Daagbok",

client/src/services/adminApi.ts

@@ -1,4 +1,4 @@
-import { apiJson } from './api.js'
+import { ApiError, apiJson } from './api.js'
 
 const ADMIN_BASE = '/api/admin'
 
@@ -40,6 +40,19 @@ export async function fetchAdminMe(): Promise<AdminMe> {
   return await apiJson<AdminMe>(`${ADMIN_BASE}/me`)
 }
 
+/** Returns true only for users listed in server ADMIN_USER_IDS. */
+export async function checkAdminAccess(): Promise<boolean> {
+  try {
+    await fetchAdminMe()
+    return true
+  } catch (err) {
+    if (err instanceof ApiError && (err.status === 401 || err.status === 403)) {
+      return false
+    }
+    return false
+  }
+}
+
 export async function fetchAdminSummary(): Promise<AdminSummary> {
   return await apiJson<AdminSummary>(`${ADMIN_BASE}/summary`)
 }