Enhance Authentication and Feature Usage Handling

- Refactored the logout function in AuthContext to handle asynchronous logout operations, improving session management.
- Updated the FeatureUsageBadge component to display error messages when feature data retrieval fails, enhancing user feedback.
- Replaced lazy loading of OnboardingPage with lazyWithRetry for improved loading reliability.
- Adjusted the EntitlementsContext to determine club ID using utility functions for better governance form handling.

frontend/src/App.jsx

@@ -1,4 +1,6 @@
 import React, { Suspense, lazy } from 'react'
+import LoginPage from './pages/LoginPage'
+import { lazyWithRetry } from './utils/lazyWithRetry'
 import {
   RouterProvider,
   createBrowserRouter,
@@ -21,8 +23,7 @@ import ActiveClubSwitcher from './components/ActiveClubSwitcher'
 import InactiveMembershipBanner from './components/InactiveMembershipBanner'
 import './app.css'
 
-const LoginPage = lazy(() => import('./pages/LoginPage'))
-const OnboardingPage = lazy(() => import('./pages/OnboardingPage'))
+const OnboardingPage = lazyWithRetry(() => import('./pages/OnboardingPage'))
 const VerifyPage = lazy(() => import('./pages/VerifyPage'))
 const Dashboard = lazy(() => import('./pages/Dashboard'))
 const AccountSettingsPage = lazy(() => import('./pages/AccountSettingsPage'))
@@ -125,11 +126,10 @@ function Nav({ showAdminNav, onboardingOnly }) {
 function ProtectedLayout() {
   const { isAuthenticated, loading, user, logout } = useAuth()
 
-  const handleLogout = () => {
-    if (confirm('Wirklich abmelden?')) {
-      logout()
-      window.location.href = '/'
-    }
+  const handleLogout = async () => {
+    if (!confirm('Wirklich abmelden?')) return
+    await logout()
+    window.location.href = '/login'
   }
 
   if (loading) {

frontend/src/components/FeatureUsageBadge.jsx

@@ -5,7 +5,7 @@ import { useEntitlements } from '../context/EntitlementsContext'
  * Unbegrenzt (limit null) → nichts rendern.
  */
 export default function FeatureUsageBadge({ featureId = 'ai_calls', label = 'KI-Kontingent' }) {
-  const { entitlements, loading, getFeature } = useEntitlements()
+  const { entitlements, loading, error, getFeature } = useEntitlements()
   const feat = getFeature(featureId)
 
   if (loading && !feat) {
@@ -16,9 +16,23 @@ export default function FeatureUsageBadge({ featureId = 'ai_calls', label = 'KI-
     )
   }
 
-  if (!feat) return null
+  if (!feat) {
+    if (error) {
+      return (
+        <span
+          className="feature-usage-badge muted"
+          style={{ fontSize: '0.8rem', color: 'var(--text3)' }}
+          title={error}
+        >
+          {label}: —
+        </span>
+      )
+    }
+    return null
+  }
 
   const { used = 0, limit, remaining, allowed } = feat
+  // limit === 0 (z. B. Free-Plan ai_calls) anzeigen; nur echtes Unbegrenzt (null) ausblenden
   if (limit == null) return null
 
   const tone = !allowed || remaining === 0 ? 'var(--danger)' : 'var(--text2)'

frontend/src/context/AuthContext.jsx

@@ -122,7 +122,12 @@ export function AuthProvider({ children }) {
     setUser(payload)
   }, [])
 
-  const logout = useCallback(() => {
+  const logout = useCallback(async () => {
+    try {
+      await api.logout()
+    } catch {
+      /* Session lokal trotzdem beenden */
+    }
     setUser(null)
     localStorage.removeItem('authToken')
     localStorage.removeItem(ACTIVE_CLUB_STORAGE_KEY)

frontend/src/context/EntitlementsContext.jsx

@@ -1,5 +1,9 @@
 import { createContext, useCallback, useContext, useEffect, useMemo, useState } from 'react'
 import { getMeEntitlements } from '../utils/api'
+import {
+  getDefaultClubIdForGovernanceForms,
+  getResolvedActiveClubIdForUi,
+} from '../utils/activeClub'
 import { useAuth } from './AuthContext'
 
 const EntitlementsContext = createContext(null)
@@ -10,7 +14,8 @@ export function EntitlementsProvider({ children }) {
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState(null)
 
-  const clubId = user?.effective_club_id ?? null
+  const clubId =
+    getResolvedActiveClubIdForUi(user) ?? getDefaultClubIdForGovernanceForms(user)
 
   const refreshEntitlements = useCallback(async () => {
     if (!isAuthenticated) {

frontend/src/utils/lazyWithRetry.js

@@ -0,0 +1,20 @@
+import { lazy } from 'react'
+
+/**
+ * Lazy-Import mit Reload bei fehlendem Chunk (nach Deploy alte Hashes im Browser-Cache).
+ */
+export function lazyWithRetry(importFn) {
+  return lazy(() =>
+    importFn().catch((err) => {
+      const key = 'sj_chunk_reload'
+      const reloaded = sessionStorage.getItem(key)
+      if (!reloaded) {
+        sessionStorage.setItem(key, '1')
+        window.location.reload()
+        return new Promise(() => {})
+      }
+      sessionStorage.removeItem(key)
+      throw err
+    }),
+  )
+}