feat: implement audio player component with progress tracking and add library page for managing subscriptions

frontend/src/components/AudioPlayer.tsx

@@ -129,7 +129,14 @@ export default function AudioPlayer({ episode, onClose, userId }: AudioPlayerPro
   }
 
   return (
-    <div className="fixed inset-0 bg-gradient-light z-50 overflow-y-auto">
+    <div 
+      className="fixed inset-0 bg-white z-[100] overflow-y-auto animate-fade-in"
+      onClick={(e) => {
+        // Close if clicking the backdrop itself
+        if (e.target === e.currentTarget) onClose();
+      }}
+    >
+      <div className="min-h-full gradient-light">
       {/* Header */}
       <div className="sticky top-0 bg-white/80 backdrop-blur-xl border-b border-light-200">
         <div className="max-w-4xl mx-auto px-4 py-4 flex items-center justify-between">
@@ -273,7 +280,13 @@ export default function AudioPlayer({ episode, onClose, userId }: AudioPlayerPro
           onTimeUpdate={handleTimeUpdate}
           onLoadedMetadata={handleLoadedMetadata}
           onEnded={() => setIsPlaying(false)}
+          onError={(e) => {
+            const target = e.target as HTMLAudioElement;
+            console.error('Audio playback error:', target.error);
+            alert("Erreur de lecture audio. Le lien est peut-être mort ou bloqué.");
+          }}
           crossOrigin="anonymous"
+          autoPlay
         />
       </div>
     </div>

frontend/src/pages/Library.tsx

@@ -53,12 +53,13 @@ export default function Library() {
       queryClient.invalidateQueries({ queryKey: ['podcasts', 'subscriptions'] });
       queryClient.invalidateQueries({ queryKey: ['episodes', 'latest'] });
     },
-    onError: (error: any) => {
+    onError: (error: any, podcastId) => {
+      console.error(`[Unsubscribe FAILED] Podcast ID: ${podcastId}`, error);
       // Rollback: re-fetch the real data from server if the mutation failed
       queryClient.invalidateQueries({ queryKey: ['podcasts', 'subscriptions'] });
       
       const errorMessage = error.response?.data?.message || 'Erreur inconnue';
-      alert(`Erreur lors du désabonnement : ${errorMessage}`);
+      alert(`Erreur lors du désabonnement (ID: ${podcastId}) : ${errorMessage}`);
     },
   });
 
@@ -73,11 +74,13 @@ export default function Library() {
   };
 
   const handleUnsubscribeRequest = (podcastId: string) => {
+    console.log("[UI] Demande de désabonnement reçue pour l'ID:", podcastId);
     setConfirmDeleteId(podcastId);
   };
 
   const handleConfirmUnsubscribe = () => {
     if (confirmDeleteId) {
+      console.log("[UI] Confirmation du désabonnement pour l'ID:", confirmDeleteId);
       unsubscribeMutation.mutate(confirmDeleteId);
     }
   };