feat: implement main navigation component and integrate protected routing in App structure

frontend/src/App.tsx

@@ -6,6 +6,7 @@ import Login from './pages/Login';
 import Dashboard from './pages/Dashboard';
 import Trending from './pages/Trending';
 import AddPodcast from './pages/AddPodcast';
+import Library from './pages/Library';
 import Navigation from './components/Navigation';
 
 const queryClient = new QueryClient({
@@ -63,6 +64,14 @@ export default function App() {
               </ProtectedRoute>
             }
           />
+          <Route
+            path="/library"
+            element={
+              <ProtectedRoute>
+                <Library />
+              </ProtectedRoute>
+            }
+          />
           <Route path="/" element={<Navigate to="/dashboard" replace />} />
           <Route path="*" element={<Navigate to="/dashboard" replace />} />
         </Routes>

frontend/src/components/Navigation.tsx

@@ -1,5 +1,5 @@
 import { Link, useLocation } from 'react-router-dom';
-import { Home, Flame, PlusCircle } from 'lucide-react';
+import { Home, Flame, PlusCircle, BookOpen } from 'lucide-react';
 
 export default function Navigation() {
   const location = useLocation();
@@ -43,6 +43,18 @@ export default function Navigation() {
             <span className="font-medium">Tendance</span>
           </Link>
 
+          <Link
+            to="/library"
+            className={`flex items-center gap-3 px-4 py-3 rounded-lg transition-colors ${
+              isActive('/library')
+                ? 'bg-blue-500 text-white'
+                : 'text-light-700 hover:bg-light-100'
+            }`}
+          >
+            <BookOpen className="w-5 h-5" />
+            <span className="font-medium">Bibliothèque</span>
+          </Link>
+
           <Link
             to="/add"
             className={`flex items-center gap-3 px-4 py-3 rounded-lg transition-colors ${

frontend/src/pages/Library.tsx

@@ -0,0 +1,198 @@
+import { useState, useEffect } from 'react';
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { podcastService, Podcast } from '../services/podcastService';
+import { authService } from '../services/authService';
+import Header from '../components/Header';
+import { BookOpen, Trash2, Loader, Rss } from 'lucide-react';
+import { Link } from 'react-router-dom';
+
+export default function Library() {
+  const queryClient = useQueryClient();
+  const [user, setUser] = useState<any>(null);
+  const [confirmDeleteId, setConfirmDeleteId] = useState<string | null>(null);
+
+  useEffect(() => {
+    const loadUser = async () => {
+      try {
+        const response = await authService.getMe();
+        setUser(response.user);
+      } catch (error) {
+        console.error('Failed to load user:', error);
+      }
+    };
+    loadUser();
+  }, []);
+
+  const { data: subscriptionsData, isLoading } = useQuery({
+    queryKey: ['podcasts', 'subscriptions'],
+    queryFn: () => podcastService.getUserSubscriptions(),
+    staleTime: 2 * 60 * 1000,
+  });
+
+  const unsubscribeMutation = useMutation({
+    mutationFn: (podcastId: string) => podcastService.unsubscribe(podcastId),
+    onSuccess: () => {
+      // Invalidate subscriptions and latest episodes so dashboard refreshes too
+      queryClient.invalidateQueries({ queryKey: ['podcasts', 'subscriptions'] });
+      queryClient.invalidateQueries({ queryKey: ['episodes', 'latest'] });
+      setConfirmDeleteId(null);
+    },
+    onError: (error: any) => {
+      alert(`Erreur : ${error.response?.data?.message || 'Impossible de se désabonner'}`);
+      setConfirmDeleteId(null);
+    },
+  });
+
+  const handleLogout = async () => {
+    try {
+      await authService.logout();
+      authService.clearTokens();
+      window.location.href = '/login';
+    } catch (error) {
+      console.error('Logout failed:', error);
+    }
+  };
+
+  const handleUnsubscribeRequest = (podcastId: string) => {
+    setConfirmDeleteId(podcastId);
+  };
+
+  const handleConfirmUnsubscribe = () => {
+    if (confirmDeleteId) {
+      unsubscribeMutation.mutate(confirmDeleteId);
+    }
+  };
+
+  const podcasts: Podcast[] = subscriptionsData?.podcasts ?? [];
+
+  return (
+    <div className="min-h-screen bg-light-50">
+      <Header
+        title="Ma Bibliothèque"
+        subtitle="Gérez vos abonnements aux podcasts"
+        user={user}
+        onLogout={handleLogout}
+      />
+
+      <main className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12">
+        {/* Title row */}
+        <div className="flex items-center justify-between mb-8">
+          <div className="flex items-center gap-2">
+            <BookOpen className="w-6 h-6 text-blue-500" />
+            <h2 className="text-xl font-bold text-light-900">
+              {isLoading ? 'Chargement...' : `${podcasts.length} abonnement${podcasts.length !== 1 ? 's' : ''}`}
+            </h2>
+          </div>
+          <Link
+            to="/add"
+            className="flex items-center gap-2 px-4 py-2 rounded-lg bg-blue-500 text-white hover:bg-blue-600 transition-colors font-medium text-sm"
+          >
+            <Rss className="w-4 h-4" />
+            Ajouter un podcast
+          </Link>
+        </div>
+
+        {/* Content */}
+        {isLoading ? (
+          <div className="flex items-center justify-center py-20">
+            <div className="text-center">
+              <Loader className="w-12 h-12 text-blue-500 animate-spin mx-auto mb-3" />
+              <p className="text-light-600">Chargement de vos abonnements...</p>
+            </div>
+          </div>
+        ) : podcasts.length === 0 ? (
+          <div className="text-center py-20">
+            <BookOpen className="w-16 h-16 text-light-300 mx-auto mb-4" />
+            <p className="text-light-600 text-lg mb-2">Votre bibliothèque est vide</p>
+            <p className="text-light-500 mb-6">Abonnez-vous à des podcasts pour les retrouver ici</p>
+            <Link
+              to="/add"
+              className="inline-flex items-center gap-2 px-6 py-3 rounded-xl bg-blue-500 text-white hover:bg-blue-600 transition-colors font-medium"
+            >
+              <Rss className="w-5 h-5" />
+              Ajouter mon premier podcast
+            </Link>
+          </div>
+        ) : (
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+            {podcasts.map((podcast) => (
+              <div key={podcast._id} className="card bg-white hover:shadow-lg transition-shadow flex flex-col">
+                {/* Podcast cover */}
+                {podcast.imageUrl ? (
+                  <div className="mb-4 rounded-lg overflow-hidden aspect-square w-24 h-24 bg-light-200 flex-shrink-0">
+                    <img
+                      src={podcast.imageUrl}
+                      alt={podcast.title}
+                      className="w-full h-full object-cover"
+                    />
+                  </div>
+                ) : (
+                  <div className="mb-4 w-24 h-24 rounded-lg bg-light-200 flex items-center justify-center flex-shrink-0">
+                    <Rss className="w-8 h-8 text-light-400" />
+                  </div>
+                )}
+
+                {/* Info */}
+                <div className="flex-1">
+                  <h3 className="text-base font-bold text-light-900 mb-1 line-clamp-2">
+                    {podcast.title}
+                  </h3>
+                  {podcast.author && (
+                    <p className="text-sm text-light-500 mb-2">{podcast.author}</p>
+                  )}
+                  <div className="flex gap-3 text-xs text-light-400 mb-4">
+                    {podcast.episodeCount > 0 && (
+                      <span>{podcast.episodeCount} épisodes</span>
+                    )}
+                    {podcast.language && <span>{podcast.language}</span>}
+                  </div>
+                </div>
+
+                {/* Unsubscribe button */}
+                {confirmDeleteId === podcast._id ? (
+                  <div className="flex items-center gap-2 mt-auto pt-3 border-t border-light-100">
+                    <span className="text-xs text-light-600 flex-1">Confirmer le désabonnement ?</span>
+                    <button
+                      onClick={handleConfirmUnsubscribe}
+                      disabled={unsubscribeMutation.isPending}
+                      className="flex items-center gap-1 px-3 py-1.5 rounded-lg bg-red-500 text-white hover:bg-red-600 disabled:opacity-50 transition-colors text-xs font-medium"
+                    >
+                      {unsubscribeMutation.isPending ? (
+                        <Loader className="w-3 h-3 animate-spin" />
+                      ) : (
+                        <Trash2 className="w-3 h-3" />
+                      )}
+                      Confirmer
+                    </button>
+                    <button
+                      onClick={() => setConfirmDeleteId(null)}
+                      className="px-3 py-1.5 rounded-lg bg-light-200 text-light-700 hover:bg-light-300 transition-colors text-xs font-medium"
+                    >
+                      Annuler
+                    </button>
+                  </div>
+                ) : (
+                  <button
+                    onClick={() => handleUnsubscribeRequest(podcast._id)}
+                    className="mt-auto pt-3 border-t border-light-100 flex items-center gap-2 text-sm text-light-500 hover:text-red-600 transition-colors w-full"
+                  >
+                    <Trash2 className="w-4 h-4" />
+                    Se désabonner
+                  </button>
+                )}
+              </div>
+            ))}
+          </div>
+        )}
+      </main>
+
+      {/* Confirm modal overlay (backdrop click to cancel) */}
+      {confirmDeleteId && (
+        <div
+          className="fixed inset-0 bg-black/20 z-40"
+          onClick={() => setConfirmDeleteId(null)}
+        />
+      )}
+    </div>
+  );
+}