diff --git a/.DS_Store b/.DS_Store
index b20cdc77..b3752861 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/.gitignore b/.gitignore
index 4ebc6399..4b5b564d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,6 +31,7 @@ xxx
 C/src/soxr-0.1.3/Release/tests
 **/Release/
 **/Debug/
+qobuz_debug
 OLD-GO-CODE/
 xxx
 xx
diff --git a/Cargo.lock b/Cargo.lock
index e5a7f33a..208cac68 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "PMOMusic"
-version = "0.3.25"
+version = "0.3.27"
 dependencies = [
  "axum 0.8.7",
  "console-subscriber",
diff --git a/Dockerfile b/Dockerfile
index 0d5c5e85..0233127f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,8 +32,9 @@ RUN apt-get update && apt-get install -y \
     cmake \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy Cargo workspace files
+# Copy Cargo workspace files and registry configuration
 COPY Cargo.toml Cargo.lock ./
+COPY .cargo/ ./.cargo/
 
 # Copy all crates
 COPY PMOMusic/ ./PMOMusic/
diff --git a/PMOMusic/Cargo.toml b/PMOMusic/Cargo.toml
index e95278b8..a5e304e2 100644
--- a/PMOMusic/Cargo.toml
+++ b/PMOMusic/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "PMOMusic"
-version = "0.3.26"
+version = "0.3.27"
 edition = "2024"
 
 [dependencies]
diff --git a/pmoapp/webapp/src/components/unified/RendererDrawer.vue b/pmoapp/webapp/src/components/unified/RendererDrawer.vue
index 88a82dc7..8eb0a19b 100644
--- a/pmoapp/webapp/src/components/unified/RendererDrawer.vue
+++ b/pmoapp/webapp/src/components/unified/RendererDrawer.vue
@@ -449,8 +449,7 @@ async function handleTransferQueue(event: Event, targetRendererId: string) {
 
 @media (max-width: 768px) and (orientation: portrait) {
     .drawer-backdrop {
-        right: 0; /* Mobile portrait: backdrop prend tout l'écran */
-        background: rgba(0, 0, 0, 0.4); /* Plus sombre sur mobile */
+        display: none; /* Mobile portrait: le drawer couvre 100vw, pas besoin de backdrop */
     }
 }
 
diff --git a/pmoapp/webapp/src/components/unified/ServerDrawer.vue b/pmoapp/webapp/src/components/unified/ServerDrawer.vue
index df3d42d6..96e5a72a 100644
--- a/pmoapp/webapp/src/components/unified/ServerDrawer.vue
+++ b/pmoapp/webapp/src/components/unified/ServerDrawer.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, computed, watch, reactive } from "vue";
+import { ref, computed, watch, reactive, onMounted, onBeforeUnmount } from "vue";
 import { useRouter } from "vue-router";
 import {
     X,
@@ -20,7 +20,6 @@ import type {
     MediaServerSummary,
     ContainerEntry,
 } from "@/services/pmocontrol/types";
-import type { BrowseState } from "@/composables/useMediaServers";
 
 const props = defineProps<{
     modelValue: boolean; // v-model pour contrôler l'ouverture
@@ -35,6 +34,10 @@ const {
     allServers,
     fetchServers,
     browseContainer,
+    getBrowseCached,
+    loadMoreBrowse,
+    hasMore,
+    loadingMore,
     currentPath,
     setPath,
     clearPath,
@@ -47,9 +50,51 @@ const router = useRouter();
 
 // État de navigation
 const currentServer = ref<MediaServerSummary | null>(null);
-const browseData = ref<BrowseState | null>(null);
+const currentContainerId = ref<string | null>(null);
+const browseData = computed(() =>
+    currentServer.value && currentContainerId.value
+        ? (getBrowseCached(currentServer.value.id, currentContainerId.value) ?? null)
+        : null,
+);
 const isLoading = ref(false);
 
+// Infinite scroll
+const sentinelRef = ref<HTMLElement | null>(null);
+const drawerContentRef = ref<HTMLElement | null>(null);
+let observer: IntersectionObserver | null = null;
+
+const canLoadMore = computed(() =>
+    currentServer.value && currentContainerId.value
+        ? hasMore(currentServer.value.id, currentContainerId.value)
+        : false,
+);
+
+function setupObserver() {
+    if (observer) observer.disconnect();
+    observer = new IntersectionObserver(
+        (entries) => {
+            if (entries[0]?.isIntersecting && canLoadMore.value && !loadingMore.value) {
+                if (currentServer.value && currentContainerId.value) {
+                    loadMoreBrowse(currentServer.value.id, currentContainerId.value);
+                }
+            }
+        },
+        { root: drawerContentRef.value, threshold: 0.1 },
+    );
+    if (sentinelRef.value) observer.observe(sentinelRef.value);
+}
+
+onMounted(() => setupObserver());
+onBeforeUnmount(() => observer?.disconnect());
+
+watch(sentinelRef, (el) => {
+    if (el) setupObserver();
+});
+
+watch(drawerContentRef, (el) => {
+    if (el) setupObserver();
+});
+
 // État du menu dropdown (pour chaque item, on stocke si son menu est ouvert)
 const openMenuId = ref<string | null>(null);
 
@@ -85,7 +130,7 @@ watch(
         } else {
             // Reset navigation quand on ferme
             currentServer.value = null;
-            browseData.value = null;
+            currentContainerId.value = null;
             clearPath();
             closeMenu();
             imageStates.clear();
@@ -143,11 +188,12 @@ async function handleServerClick(server: MediaServerSummary) {
 
     try {
         // Browse racine (containerId = "0")
-        browseData.value = await browseContainer(server.id, "0");
+        await browseContainer(server.id, "0");
+        currentContainerId.value = "0";
         setPath([{ id: "0", title: server.friendly_name }]);
     } catch (error) {
         console.error("[ServerDrawer] Erreur browse racine:", error);
-        browseData.value = null;
+        currentContainerId.value = null;
     } finally {
         isLoading.value = false;
     }
@@ -155,7 +201,7 @@ async function handleServerClick(server: MediaServerSummary) {
 
 function goBack() {
     currentServer.value = null;
-    browseData.value = null;
+    currentContainerId.value = null;
     clearPath();
 }
 
@@ -164,10 +210,8 @@ async function handleContainerClick(item: ContainerEntry) {
 
     isLoading.value = true;
     try {
-        browseData.value = await browseContainer(
-            currentServer.value.id,
-            item.id,
-        );
+        await browseContainer(currentServer.value.id, item.id);
+        currentContainerId.value = item.id;
         setPath([...currentPath.value, { id: item.id, title: item.title }]);
     } catch (error) {
         console.error("[ServerDrawer] Erreur browse container:", error);
@@ -185,10 +229,8 @@ async function handleBreadcrumbClick(index: number) {
     isLoading.value = true;
 
     try {
-        browseData.value = await browseContainer(
-            currentServer.value.id,
-            targetCrumb.id,
-        );
+        await browseContainer(currentServer.value.id, targetCrumb.id);
+        currentContainerId.value = targetCrumb.id;
         setPath(currentPath.value.slice(0, index + 1));
     } catch (error) {
         console.error("[ServerDrawer] Erreur breadcrumb navigation:", error);
@@ -386,7 +428,7 @@ function handleSettingsClick() {
                 </nav>
 
                 <!-- Contenu -->
-                <div class="drawer-content">
+                <div ref="drawerContentRef" class="drawer-content">
                     <!-- Liste des serveurs -->
                     <div v-if="!isNavigating">
                         <!-- Servers online -->
@@ -627,8 +669,16 @@ function handleSettingsClick() {
                             </li>
                         </ul>
 
+                        <!-- Sentinel infinite scroll -->
+                        <div v-if="canLoadMore" ref="sentinelRef" class="scroll-sentinel" />
+
+                        <!-- Spinner load more -->
+                        <div v-if="loadingMore" class="load-more-spinner">
+                            <div class="spinner"></div>
+                        </div>
+
                         <!-- Vide -->
-                        <div v-else class="empty-servers">
+                        <div v-else-if="!browseData" class="empty-servers">
                             <Folder :size="48" />
                             <p>Dossier vide</p>
                         </div>
@@ -666,8 +716,7 @@ function handleSettingsClick() {
 
 @media (max-width: 768px) and (orientation: portrait) {
     .drawer-backdrop {
-        left: 0; /* Mobile portrait: backdrop commence à gauche car drawer prend 100vw */
-        background: rgba(0, 0, 0, 0.4); /* Plus sombre sur mobile */
+        display: none; /* Mobile portrait: le drawer couvre 100vw, pas besoin de backdrop */
     }
 }
 
@@ -1257,6 +1306,17 @@ function handleSettingsClick() {
     transform: translateY(0);
 }
 
+.scroll-sentinel {
+    height: 1px;
+}
+
+.load-more-spinner {
+    display: flex;
+    justify-content: center;
+    padding: var(--spacing-md);
+    color: var(--color-text-secondary);
+}
+
 /* Animations */
 .backdrop-enter-active {
     transition: opacity 0.3s ease-out;
diff --git a/pmoaudiocache/src/track_metadata.rs b/pmoaudiocache/src/track_metadata.rs
index 2e454066..582748fb 100644
--- a/pmoaudiocache/src/track_metadata.rs
+++ b/pmoaudiocache/src/track_metadata.rs
@@ -20,6 +20,9 @@ fn map_db_err(err: rusqlite::Error) -> MetadataError {
 pub struct AudioCacheTrackMetadata {
     cache: Arc<crate::Cache>,
     pk: String,
+    /// Real pk si le lazy pk a été téléchargé, None sinon.
+    /// Résolu une seule fois à la construction pour éviter N appels DB par champ.
+    real_pk: Option<String>,
 }
 
 impl AudioCacheTrackMetadata {
@@ -28,13 +31,26 @@ impl AudioCacheTrackMetadata {
     /// Le type implémente ensuite toutes les méthodes du trait `pmometadata::TrackMetadata`
     /// en stockant les données dans la base SQLite de `pmocache`.
     pub fn new(cache: Arc<crate::Cache>, pk: impl Into<String>) -> Self {
-        Self {
-            cache,
-            pk: pk.into(),
-        }
+        let pk_str: String = pk.into();
+        // Résolution lazy→real une seule fois à la construction (une seule query DB).
+        let real_pk = if pmocache::is_lazy_pk(&pk_str) {
+            cache.db.get_pk_by_lazy_pk(&pk_str).ok().flatten()
+        } else {
+            None
+        };
+        Self { cache, pk: pk_str, real_pk }
     }
 
     fn read_raw(&self, key: &str) -> Result<Option<Value>, MetadataError> {
+        // Si le lazy pk a été téléchargé, lire d'abord sous le real_pk
+        // (métadonnées écrites par FlacCacheSink), puis fallback sous le lazy_pk
+        // pour les clés semées avant téléchargement (cover_pk, etc.).
+        if let Some(real_pk) = &self.real_pk {
+            if let Ok(Some(v)) = self.cache.db.get_a_metadata(real_pk, key) {
+                return Ok(Some(v));
+            }
+            return self.cache.db.get_a_metadata(&self.pk, key).map_err(map_db_err);
+        }
         self.cache
             .db
             .get_a_metadata(&self.pk, key)
diff --git a/pmocache/src/cache.rs b/pmocache/src/cache.rs
index 6d43ccd7..8f86b591 100755
--- a/pmocache/src/cache.rs
+++ b/pmocache/src/cache.rs
@@ -404,7 +404,20 @@ impl<C: CacheConfig + 'static> Cache<C> {
     ) -> Result<Self> {
         let directory = PathBuf::from(dir);
         std::fs::create_dir_all(&directory)?;
-        let db = DB::init(&directory.join("cache.db"))?;
+        let (db, was_reset) = DB::init(&directory.join("cache.db"))?;
+
+        // Si le schéma a changé, effacer tous les fichiers du cache (cohérence DB/fichiers)
+        if was_reset {
+            tracing::warn!("Cache schema changed, clearing all cache files in {:?}", directory);
+            if let Ok(entries) = std::fs::read_dir(&directory) {
+                for entry in entries.flatten() {
+                    let path = entry.path();
+                    if path.is_file() && path.file_name().map_or(false, |n| n != "cache.db") {
+                        std::fs::remove_file(&path).ok();
+                    }
+                }
+            }
+        }
 
         // Créer un channel pour les events (capacité de 100 events en buffer)
         let (served_tx, _) = broadcast::channel(100);
diff --git a/pmocache/src/db.rs b/pmocache/src/db.rs
index e056d9c2..509000c2 100644
--- a/pmocache/src/db.rs
+++ b/pmocache/src/db.rs
@@ -12,6 +12,13 @@ use tracing::{trace, warn};
 use std::path::Path;
 use std::str::FromStr;
 use std::sync::{Mutex, MutexGuard};
+
+/// Version du schéma de la base de données du cache.
+///
+/// Incrémenter cette constante à chaque modification incompatible du schéma.
+/// Cela provoquera la suppression de la DB **et de tous les fichiers du cache**
+/// au prochain démarrage.
+pub const SCHEMA_VERSION: u32 = 1;
 use std::time::Instant;
 
 #[cfg(feature = "openapi")]
@@ -118,7 +125,33 @@ impl DB {
     ///
     /// let db = DB::init(Path::new("cache.db")).unwrap();
     /// ```
-    pub fn init(path: &Path) -> Result<Self, rusqlite::Error> {
+    /// Initialise la DB. Retourne `(db, was_reset)` où `was_reset` indique si la DB
+    /// a été supprimée et recréée suite à un changement de version de schéma.
+    /// Dans ce cas, l'appelant doit aussi effacer les fichiers du cache.
+    pub fn init(path: &Path) -> Result<(Self, bool), rusqlite::Error> {
+        let was_reset = if path.exists() {
+            if let Ok(conn) = Connection::open(path) {
+                let version: u32 = conn
+                    .query_row("PRAGMA user_version", [], |r| r.get(0))
+                    .unwrap_or(0);
+                if version != SCHEMA_VERSION {
+                    drop(conn);
+                    warn!(
+                        "Cache DB schema version mismatch (found {}, expected {}), recreating",
+                        version, SCHEMA_VERSION
+                    );
+                    std::fs::remove_file(path).ok();
+                    true
+                } else {
+                    false
+                }
+            } else {
+                false
+            }
+        } else {
+            false
+        };
+
         let conn = Connection::open(path)?;
         conn.execute("PRAGMA foreign_keys = ON", [])?;
 
@@ -184,9 +217,10 @@ impl DB {
             [],
         )?;
 
-        Ok(Self {
-            conn: Mutex::new(conn),
-        })
+        // Inscrire la version du schéma
+        conn.execute_batch(&format!("PRAGMA user_version = {}", SCHEMA_VERSION))?;
+
+        Ok((Self { conn: Mutex::new(conn) }, was_reset))
     }
 
     /// Ajoute ou met à jour une entrée dans la base de données
@@ -1103,7 +1137,23 @@ impl DB {
             return Err(Error::QueryReturnedNoRows);
         }
 
-        tx.commit()
+        // Compter les métadonnées encore sous l'ancien lazy_pk avant le commit
+        let meta_under_lazy: i64 = tx
+            .query_row(
+                "SELECT COUNT(*) FROM metadata WHERE pk = ?1",
+                [lazy_pk],
+                |r| r.get(0),
+            )
+            .unwrap_or(0);
+
+        tx.commit()?;
+
+        tracing::debug!(
+            "update_lazy_to_downloaded: {} → {} ({} metadata rows still under lazy_pk)",
+            lazy_pk, real_pk, meta_under_lazy
+        );
+
+        Ok(())
     }
 
     /// Recherche une entry par son origin_url
diff --git a/pmocontrol/src/control_point.rs b/pmocontrol/src/control_point.rs
index 224ccaad..998fe91a 100644
--- a/pmocontrol/src/control_point.rs
+++ b/pmocontrol/src/control_point.rs
@@ -1538,41 +1538,62 @@ fn refresh_attached_queue_for(
         return Ok(());
     }
 
-    // Step 3: Browse container
+    // Step 3: Notify UI that the renderer is loading (Transitioning state)
+    event_bus.broadcast(RendererEvent::StateChanged {
+        id: renderer_id.clone(),
+        state: PlaybackState::Transitioning,
+    });
+
+    // Step 4: Browse container (renamed from Step 3 for clarity)
 
     const MAX_BROWSE_ATTEMPTS: usize = 3;
     const BROWSE_RETRY_DELAY_MS: u64 = 200;
-    let mut attempt = 1;
-    let entries = loop {
-        match music_server.browse_children(&container_id, 0, 64) {
-            Ok(e) => break e,
-            Err(err) => {
-                if attempt >= MAX_BROWSE_ATTEMPTS {
-                    warn!(
-                        renderer = renderer_id.0.as_str(),
-                        server = server_id.0.as_str(),
-                        container = container_id.as_str(),
-                        attempts = attempt,
-                        error = %err,
-                        "Failed to browse playlist container for refresh"
-                    );
-                    return Err(err);
-                }
+    const BROWSE_PAGE_SIZE: u32 = 64;
 
-                debug!(
-                    renderer = renderer_id.0.as_str(),
-                    server = server_id.0.as_str(),
-                    container = container_id.as_str(),
-                    attempt,
-                    error = %err,
-                    "Browse attempt failed, retrying"
-                );
-                thread::sleep(Duration::from_millis(
-                    BROWSE_RETRY_DELAY_MS * attempt as u64,
-                ));
-                attempt += 1;
+    // Paginated browse — une playlist peut dépasser BROWSE_PAGE_SIZE items
+    let entries = {
+        let mut all_entries = Vec::new();
+        let mut offset = 0u32;
+        loop {
+            let mut attempt = 1;
+            let page = loop {
+                match music_server.browse_children(&container_id, offset, BROWSE_PAGE_SIZE) {
+                    Ok(e) => break e,
+                    Err(err) => {
+                        if attempt >= MAX_BROWSE_ATTEMPTS {
+                            warn!(
+                                renderer = renderer_id.0.as_str(),
+                                server = server_id.0.as_str(),
+                                container = container_id.as_str(),
+                                attempts = attempt,
+                                error = %err,
+                                "Failed to browse playlist container for refresh"
+                            );
+                            return Err(err);
+                        }
+                        debug!(
+                            renderer = renderer_id.0.as_str(),
+                            server = server_id.0.as_str(),
+                            container = container_id.as_str(),
+                            attempt,
+                            error = %err,
+                            "Browse attempt failed, retrying"
+                        );
+                        thread::sleep(Duration::from_millis(
+                            BROWSE_RETRY_DELAY_MS * attempt as u64,
+                        ));
+                        attempt += 1;
+                    }
+                }
+            };
+            let fetched = page.len() as u32;
+            all_entries.extend(page);
+            if fetched < BROWSE_PAGE_SIZE {
+                break;
             }
+            offset += fetched;
         }
+        all_entries
     };
 
     debug!(
diff --git a/pmocontrol/src/pmoserver_ext.rs b/pmocontrol/src/pmoserver_ext.rs
index 9bb18727..a80bcb21 100644
--- a/pmocontrol/src/pmoserver_ext.rs
+++ b/pmocontrol/src/pmoserver_ext.rs
@@ -2234,8 +2234,19 @@ fn fetch_playback_items(
     let object_metadata = server.browse_object(object_id)?;
 
     let entries = if object_metadata.is_container {
-        // For containers, browse children to get all items
-        server.browse_children(object_id, 0, BROWSE_DEFAULT_LIMIT)?
+        // For containers, browse all children with pagination
+        let mut all_entries = Vec::new();
+        let mut offset = 0u32;
+        loop {
+            let page = server.browse_children(object_id, offset, BROWSE_DEFAULT_LIMIT)?;
+            let fetched = page.len() as u32;
+            all_entries.extend(page);
+            if fetched < BROWSE_DEFAULT_LIMIT {
+                break;
+            }
+            offset += fetched;
+        }
+        all_entries
     } else {
         // For items, use the object itself
         vec![object_metadata]
diff --git a/pmocontrol/src/upnp_clients/openhome_client.rs b/pmocontrol/src/upnp_clients/openhome_client.rs
index fc9bd3f4..dd8080d3 100644
--- a/pmocontrol/src/upnp_clients/openhome_client.rs
+++ b/pmocontrol/src/upnp_clients/openhome_client.rs
@@ -185,11 +185,12 @@ impl OhPlaylistClient {
             return Ok(Vec::new());
         }
 
+        // OpenHome spec: IdList is space-delimited (not comma-delimited)
         let id_list_csv = id_list
             .iter()
             .map(|id| id.to_string())
             .collect::<Vec<_>>()
-            .join(",");
+            .join(" ");
         let args = [("IdList", id_list_csv.as_str())];
 
         let call_result =
diff --git a/pmoplaylist/src/handle/read.rs b/pmoplaylist/src/handle/read.rs
index c07e325c..8f9ccf4d 100644
--- a/pmoplaylist/src/handle/read.rs
+++ b/pmoplaylist/src/handle/read.rs
@@ -70,6 +70,8 @@ impl ReadHandle {
                         let role = self.playlist.role().await;
                         let cover_pk = self.playlist.cover_pk().await;
                         let artist = self.playlist.artist().await;
+                        let source = self.playlist.source().await;
+                        let source_version = self.playlist.source_version().await;
                         let core = self.playlist.core.read().await;
                         let _ = persistence
                             .save_playlist(
@@ -78,6 +80,8 @@ impl ReadHandle {
                                 &role,
                                 cover_pk.as_deref(),
                                 artist.as_deref(),
+                                source.as_deref(),
+                                source_version.as_deref(),
                                 &core.config,
                                 &core.tracks,
                             )
@@ -170,6 +174,21 @@ impl ReadHandle {
         &self.playlist.id
     }
 
+    /// Nombre total de records (sans validation cache)
+    pub async fn len(&self) -> usize {
+        self.playlist.core.read().await.len()
+    }
+
+    /// Retourne la source externe.
+    pub async fn source(&self) -> Option<String> {
+        self.playlist.source().await
+    }
+
+    /// Retourne la version de la source.
+    pub async fn source_version(&self) -> Option<String> {
+        self.playlist.source_version().await
+    }
+
     /// Génère un Container DIDL-Lite
     pub async fn to_container(&self) -> Result<Container> {
         if !self.playlist.is_alive() {
@@ -199,6 +218,86 @@ impl ReadHandle {
         })
     }
 
+    /// Génère des Items DIDL-Lite avec pagination offset-based (sans déplacer le curseur)
+    ///
+    /// Retourne `(items, total)` où `total` est le nombre total de records dans la playlist.
+    /// Contrairement à `to_items()`, cette méthode ignore le curseur et utilise `offset`.
+    pub async fn to_items_paged(&self, offset: usize, limit: usize) -> Result<(Vec<Item>, usize)> {
+        if !self.playlist.is_alive() {
+            return Err(crate::Error::PlaylistDeleted(self.playlist.id.clone()));
+        }
+
+        let core = self.playlist.core.read().await;
+        let total = core.len();
+        let cache = crate::manager::audio_cache()?;
+
+        let mut items = Vec::new();
+        let mut idx = 0usize;
+
+        for i in offset..core.len() {
+            if items.len() >= limit {
+                break;
+            }
+
+            let record = match core.get(i) {
+                Some(r) => r,
+                None => continue,
+            };
+
+            if !cache.is_valid_pk(&record.cache_pk).await {
+                continue;
+            }
+
+            use pmoaudiocache::metadata_ext::{AudioTrackMetadataExt, TrackMetadataDidlExt};
+            let track_meta = cache.track_metadata(&record.cache_pk);
+            let meta = track_meta.read().await;
+
+            let url = cache.route_for(&record.cache_pk, None);
+            let resource = meta.to_didl_resource(url).await;
+
+            let title = meta
+                .get_title()
+                .await
+                .ok()
+                .flatten()
+                .unwrap_or_else(|| "Unknown".to_string());
+            let artist = meta.get_artist().await.ok().flatten();
+            let album = meta.get_album().await.ok().flatten();
+            let genre = meta.get_genre().await.ok().flatten();
+            let year = meta.get_year().await.ok().flatten();
+            let track_number = meta.get_track_number().await.ok().flatten();
+            let cover_pk = meta.get_cover_pk().await.ok().flatten();
+            let cover_url = if let Some(pk) = cover_pk.as_ref() {
+                Some(pmocache::covers_route_for(pk, None))
+            } else {
+                meta.get_cover_url().await.ok().flatten()
+            };
+
+            let item = Item {
+                id: format!("{}:{}", self.playlist.id, offset + idx),
+                parent_id: self.playlist.id.clone(),
+                restricted: Some("1".to_string()),
+                title: title.clone(),
+                creator: artist.clone(),
+                class: "object.item.audioItem.musicTrack".to_string(),
+                artist,
+                album,
+                genre,
+                album_art: cover_url,
+                album_art_pk: cover_pk,
+                date: year.map(|y| y.to_string()),
+                original_track_number: track_number.map(|n| n.to_string()),
+                resources: vec![resource],
+                descriptions: vec![],
+            };
+
+            items.push(item);
+            idx += 1;
+        }
+
+        Ok((items, total))
+    }
+
     /// Génère des Items DIDL-Lite depuis la position actuelle
     pub async fn to_items(&self, limit: usize) -> Result<Vec<Item>> {
         if !self.playlist.is_alive() {
diff --git a/pmoplaylist/src/handle/write.rs b/pmoplaylist/src/handle/write.rs
index be5a512b..f45e6c04 100644
--- a/pmoplaylist/src/handle/write.rs
+++ b/pmoplaylist/src/handle/write.rs
@@ -553,6 +553,50 @@ impl WriteHandle {
 
     // Helpers internes
 
+    /// Met à jour la source externe de la playlist.
+    pub async fn set_source(&self, source: Option<String>) -> Result<()> {
+        if !self.playlist.is_alive() {
+            return Err(crate::Error::PlaylistDeleted(self.playlist.id.clone()));
+        }
+
+        self.playlist.set_source(source).await;
+
+        if self.playlist.persistent {
+            self.save_to_db().await?;
+        }
+
+        crate::manager::PlaylistManager().notify_playlist_changed(&self.playlist.id);
+
+        Ok(())
+    }
+
+    /// Met à jour la version de la source (ex: updated_at).
+    pub async fn set_source_version(&self, version: Option<String>) -> Result<()> {
+        if !self.playlist.is_alive() {
+            return Err(crate::Error::PlaylistDeleted(self.playlist.id.clone()));
+        }
+
+        self.playlist.set_source_version(version).await;
+
+        if self.playlist.persistent {
+            self.save_to_db().await?;
+        }
+
+        crate::manager::PlaylistManager().notify_playlist_changed(&self.playlist.id);
+
+        Ok(())
+    }
+
+    /// Retourne la source externe.
+    pub async fn source(&self) -> Option<String> {
+        self.playlist.source().await
+    }
+
+    /// Retourne la version de la source.
+    pub async fn source_version(&self) -> Option<String> {
+        self.playlist.source_version().await
+    }
+
     async fn save_to_db(&self) -> Result<()> {
         let manager = crate::manager::PlaylistManager();
         let persistence = manager
@@ -567,6 +611,8 @@ impl WriteHandle {
 
         let cover_pk = self.playlist.cover_pk().await;
         let artist = self.playlist.artist().await;
+        let source = self.playlist.source().await;
+        let source_version = self.playlist.source_version().await;
 
         persistence
             .save_playlist(
@@ -575,6 +621,8 @@ impl WriteHandle {
                 &role,
                 cover_pk.as_deref(),
                 artist.as_deref(),
+                source.as_deref(),
+                source_version.as_deref(),
                 config,
                 tracks,
             )
diff --git a/pmoplaylist/src/manager.rs b/pmoplaylist/src/manager.rs
index 806b829c..c791c1dd 100644
--- a/pmoplaylist/src/manager.rs
+++ b/pmoplaylist/src/manager.rs
@@ -215,6 +215,8 @@ impl PlaylistManager {
                     &role,
                     cover_pk.as_deref(),
                     artist.as_deref(),
+                    None,
+                    None,
                     &core.config,
                     &core.tracks,
                 )
@@ -522,7 +524,7 @@ impl PlaylistManager {
 
         // Pas en mémoire, essayer de charger depuis la DB
         if let Some(persistence) = &self.inner.persistence {
-            if let Some((title, role, config, cover_pk, artist, tracks)) =
+            if let Some((title, role, config, cover_pk, artist, source, source_version, tracks)) =
                 persistence.load_playlist(&id).await?
             {
                 // Reconstruire la playlist
@@ -537,10 +539,16 @@ impl PlaylistManager {
                     cover_pk,
                 ));
 
-                // Restaurer l'artiste si présent
+                // Restaurer les métadonnées optionnelles
                 if let Some(artist_name) = artist {
                     playlist.set_artist(Some(artist_name)).await;
                 }
+                if source.is_some() {
+                    playlist.set_source(source).await;
+                }
+                if source_version.is_some() {
+                    playlist.set_source_version(source_version).await;
+                }
 
                 // Restaurer les tracks
                 {
@@ -583,7 +591,7 @@ impl PlaylistManager {
 
         // Pas en m�moire, essayer de ressusciter depuis la DB
         if let Some(persistence) = &self.inner.persistence {
-            if let Some((title, role, config, cover_pk, artist, tracks)) =
+            if let Some((title, role, config, cover_pk, artist, source, source_version, tracks)) =
                 persistence.load_playlist(id).await?
             {
                 // Reconstruire la playlist
@@ -598,10 +606,16 @@ impl PlaylistManager {
                     cover_pk,
                 ));
 
-                // Restaurer l'artiste si présent
+                // Restaurer les métadonnées optionnelles
                 if let Some(artist_name) = artist {
                     playlist.set_artist(Some(artist_name)).await;
                 }
+                if source.is_some() {
+                    playlist.set_source(source).await;
+                }
+                if source_version.is_some() {
+                    playlist.set_source_version(source_version).await;
+                }
 
                 // Restaurer les tracks
                 {
@@ -995,6 +1009,8 @@ impl PlaylistManager {
                         let role = playlist.role().await;
                         let cover_pk = playlist.cover_pk().await;
                         let artist = playlist.artist().await;
+                        let source = playlist.source().await;
+                        let source_version = playlist.source_version().await;
                         let core = playlist.core.read().await;
                         let _ = persistence
                             .save_playlist(
@@ -1003,6 +1019,8 @@ impl PlaylistManager {
                                 &role,
                                 cover_pk.as_deref(),
                                 artist.as_deref(),
+                                source.as_deref(),
+                                source_version.as_deref(),
                                 &core.config,
                                 &core.tracks,
                             )
diff --git a/pmoplaylist/src/persistence/mod.rs b/pmoplaylist/src/persistence/mod.rs
index ad1a16ca..092ee435 100644
--- a/pmoplaylist/src/persistence/mod.rs
+++ b/pmoplaylist/src/persistence/mod.rs
@@ -11,6 +11,13 @@ use std::str::FromStr;
 use std::sync::{Arc, Mutex};
 use std::time::{Duration, SystemTime, UNIX_EPOCH};
 
+/// Version du schéma de la base de données des playlists.
+///
+/// Incrémenter cette constante à chaque modification incompatible du schéma
+/// (ajout/suppression de colonne non nullable, changement de type, etc.).
+/// Cela provoquera la suppression et la recréation automatique de la DB au démarrage.
+const SCHEMA_VERSION: u32 = 1;
+
 /// Gestionnaire de persistance (une base pour toutes les playlists)
 pub struct PersistenceManager {
     conn: Arc<Mutex<Connection>>,
@@ -26,6 +33,26 @@ impl PersistenceManager {
             })?;
         }
 
+        // Vérifier la version du schéma — supprimer la DB si incompatible
+        if db_path.exists() {
+            if let Ok(conn) = Connection::open(db_path) {
+                let version: u32 = conn
+                    .query_row("PRAGMA user_version", [], |r| r.get(0))
+                    .unwrap_or(0);
+                if version != SCHEMA_VERSION {
+                    drop(conn);
+                    tracing::warn!(
+                        "Playlist DB schema version mismatch (found {}, expected {}), recreating",
+                        version,
+                        SCHEMA_VERSION
+                    );
+                    std::fs::remove_file(db_path).map_err(|e| {
+                        crate::Error::PersistenceError(format!("Failed to remove old DB: {}", e))
+                    })?;
+                }
+            }
+        }
+
         let conn = Connection::open(db_path).map_err(|e| {
             crate::Error::PersistenceError(format!("Failed to open database: {}", e))
         })?;
@@ -38,6 +65,8 @@ impl PersistenceManager {
                 role TEXT NOT NULL,
                 cover_pk TEXT,
                 artist TEXT,
+                source TEXT,
+                source_version TEXT,
                 max_size INTEGER,
                 default_ttl_secs INTEGER,
                 created_at INTEGER NOT NULL,
@@ -75,6 +104,12 @@ impl PersistenceManager {
         )
         .map_err(|e| crate::Error::PersistenceError(format!("Failed to create index: {}", e)))?;
 
+        // Inscrire la version du schéma
+        conn.execute_batch(&format!("PRAGMA user_version = {}", SCHEMA_VERSION))
+            .map_err(|e| {
+                crate::Error::PersistenceError(format!("Failed to set schema version: {}", e))
+            })?;
+
         Ok(Self {
             conn: Arc::new(Mutex::new(conn)),
         })
@@ -88,6 +123,8 @@ impl PersistenceManager {
         role: &PlaylistRole,
         cover_pk: Option<&str>,
         artist: Option<&str>,
+        source: Option<&str>,
+        source_version: Option<&str>,
         config: &PlaylistConfig,
         tracks: &VecDeque<Arc<Record>>,
     ) -> Result<()> {
@@ -100,16 +137,18 @@ impl PersistenceManager {
 
         // Upsert playlist metadata
         conn.execute(
-            "INSERT OR REPLACE INTO playlists (id, title, role, cover_pk, artist, max_size, default_ttl_secs, created_at, last_modified)
-             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7,
-                     COALESCE((SELECT created_at FROM playlists WHERE id = ?1), ?8),
-                     ?8)",
+            "INSERT OR REPLACE INTO playlists (id, title, role, cover_pk, artist, source, source_version, max_size, default_ttl_secs, created_at, last_modified)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9,
+                     COALESCE((SELECT created_at FROM playlists WHERE id = ?1), ?10),
+                     ?10)",
             params![
                 id,
                 title,
                 role.as_str(),
                 cover_pk,
                 artist,
+                source,
+                source_version,
                 config.max_size.map(|s| s as i64),
                 config.default_ttl.map(|d| d.as_secs() as i64),
                 now_nanos,
@@ -154,6 +193,8 @@ impl PersistenceManager {
             PlaylistConfig,
             Option<String>,
             Option<String>,
+            Option<String>,
+            Option<String>,
             VecDeque<Arc<Record>>,
         )>,
     > {
@@ -161,7 +202,7 @@ impl PersistenceManager {
 
         // Charger les métadonnées
         let mut stmt = conn.prepare(
-            "SELECT title, role, cover_pk, artist, max_size, default_ttl_secs FROM playlists WHERE id = ?1",
+            "SELECT title, role, cover_pk, artist, source, source_version, max_size, default_ttl_secs FROM playlists WHERE id = ?1",
         )
         .map_err(|e| {
             crate::Error::PersistenceError(format!("Failed to prepare statement: {}", e))
@@ -172,8 +213,10 @@ impl PersistenceManager {
             let role_raw: String = row.get(1)?;
             let cover_pk: Option<String> = row.get(2)?;
             let artist: Option<String> = row.get(3)?;
-            let max_size: Option<i64> = row.get(4)?;
-            let default_ttl_secs: Option<i64> = row.get(5)?;
+            let source: Option<String> = row.get(4)?;
+            let source_version: Option<String> = row.get(5)?;
+            let max_size: Option<i64> = row.get(6)?;
+            let default_ttl_secs: Option<i64> = row.get(7)?;
 
             Ok((
                 title,
@@ -185,10 +228,12 @@ impl PersistenceManager {
                 },
                 cover_pk,
                 artist,
+                source,
+                source_version,
             ))
         });
 
-        let (title, role, config, cover_pk, artist) = match result {
+        let (title, role, config, cover_pk, artist, source, source_version) = match result {
             Ok(data) => data,
             Err(rusqlite::Error::QueryReturnedNoRows) => return Ok(None),
             Err(e) => {
@@ -231,7 +276,7 @@ impl PersistenceManager {
             tracks.push_back(Arc::new(record));
         }
 
-        Ok(Some((title, role, config, cover_pk, artist, tracks)))
+        Ok(Some((title, role, config, cover_pk, artist, source, source_version, tracks)))
     }
 
     /// Supprime une playlist
diff --git a/pmoplaylist/src/playlist/mod.rs b/pmoplaylist/src/playlist/mod.rs
index e3712bca..3afad7a2 100644
--- a/pmoplaylist/src/playlist/mod.rs
+++ b/pmoplaylist/src/playlist/mod.rs
@@ -36,6 +36,10 @@ pub struct Playlist {
     role: RwLock<PlaylistRole>,
     cover_pk: RwLock<Option<String>>,
     artist: RwLock<Option<String>>,
+    /// Source externe (ex: "qobuz")
+    source: RwLock<Option<String>>,
+    /// Version de la source (ex: timestamp updated_at de Qobuz)
+    source_version: RwLock<Option<String>>,
     state: Arc<AtomicU8>,
     pub core: Arc<RwLock<PlaylistCore>>,
     pub persistent: bool,
@@ -59,6 +63,8 @@ impl Playlist {
             role: RwLock::new(role),
             cover_pk: RwLock::new(cover_pk),
             artist: RwLock::new(None),
+            source: RwLock::new(None),
+            source_version: RwLock::new(None),
             state: Arc::new(AtomicU8::new(PlaylistState::Active as u8)),
             core: Arc::new(RwLock::new(PlaylistCore::new(config))),
             persistent,
@@ -127,6 +133,28 @@ impl Playlist {
         self.touch().await;
     }
 
+    /// Retourne la source externe associée à la playlist.
+    pub async fn source(&self) -> Option<String> {
+        self.source.read().await.clone()
+    }
+
+    /// Modifie la source de la playlist.
+    pub async fn set_source(&self, value: Option<String>) {
+        *self.source.write().await = value;
+        self.touch().await;
+    }
+
+    /// Retourne la version de la source (ex: updated_at timestamp).
+    pub async fn source_version(&self) -> Option<String> {
+        self.source_version.read().await.clone()
+    }
+
+    /// Modifie la version de la source.
+    pub async fn set_source_version(&self, value: Option<String>) {
+        *self.source_version.write().await = value;
+        self.touch().await;
+    }
+
     /// Timestamp du dernier changement
     pub async fn last_change(&self) -> SystemTime {
         *self.last_change.read().await
diff --git a/pmoqobuz/src/api/catalog.rs b/pmoqobuz/src/api/catalog.rs
index 99dd8b9e..f93f750a 100644
--- a/pmoqobuz/src/api/catalog.rs
+++ b/pmoqobuz/src/api/catalog.rs
@@ -32,6 +32,8 @@ pub(crate) struct AlbumResponse {
     #[serde(default)]
     release_date_original: Option<String>,
     #[serde(default)]
+    released_at: Option<i64>,
+    #[serde(default)]
     image: Option<ImageResponse>,
     #[serde(default = "default_streamable")]
     streamable: bool,
@@ -120,6 +122,8 @@ pub(crate) struct PlaylistResponse {
     #[serde(default)]
     owner: Option<OwnerResponse>,
     #[serde(default)]
+    updated_at: Option<i64>,
+    #[serde(default)]
     tracks: Option<PaginatedResponse<TrackResponse>>,
 }
 
@@ -317,6 +321,16 @@ impl QobuzApi {
             .collect())
     }
 
+    /// Récupère les métadonnées d'une playlist sans les tracks (appel léger)
+    ///
+    /// Utile pour vérifier `updated_at` avant de décider si le cache est valide.
+    pub async fn get_playlist_metadata(&self, playlist_id: &str) -> Result<Playlist> {
+        debug!("Fetching playlist metadata {}", playlist_id);
+        let params = [("playlist_id", playlist_id)];
+        let response: PlaylistResponse = self.get("/playlist/get", &params).await?;
+        Ok(Self::parse_playlist(response))
+    }
+
     /// Récupère les détails d'une playlist
     pub async fn get_playlist(&self, playlist_id: &str) -> Result<Playlist> {
         debug!("Fetching playlist {}", playlist_id);
@@ -328,18 +342,36 @@ impl QobuzApi {
     /// Récupère les tracks d'une playlist
     pub async fn get_playlist_tracks(&self, playlist_id: &str) -> Result<Vec<Track>> {
         debug!("Fetching tracks for playlist {}", playlist_id);
-        let params = [("playlist_id", playlist_id), ("extra", "tracks")];
-        let response: PlaylistResponse = self.get("/playlist/get", &params).await?;
+        const PAGE_SIZE: u32 = 50;
+        let mut all_tracks = Vec::new();
+        let mut offset = 0u32;
 
-        if let Some(tracks) = response.tracks {
-            Ok(tracks
-                .items
-                .into_iter()
-                .map(|t| Self::parse_track(t, None))
-                .collect())
-        } else {
-            Ok(Vec::new())
+        loop {
+            let offset_str = offset.to_string();
+            let limit_str = PAGE_SIZE.to_string();
+            let params = [
+                ("playlist_id", playlist_id),
+                ("extra", "tracks"),
+                ("offset", offset_str.as_str()),
+                ("limit", limit_str.as_str()),
+            ];
+            let response: PlaylistResponse = self.get("/playlist/get", &params).await?;
+
+            if let Some(tracks) = response.tracks {
+                let total = tracks.total.unwrap_or(0);
+                let count = tracks.items.len() as u32;
+                all_tracks.extend(tracks.items.into_iter().map(|t| Self::parse_track(t, None)));
+                offset += count;
+                if count == 0 || offset >= total {
+                    break;
+                }
+            } else {
+                break;
+            }
         }
+
+        debug!("Fetched {} tracks total for playlist {}", all_tracks.len(), playlist_id);
+        Ok(all_tracks)
     }
 
     /// Récupère la liste des genres
@@ -493,6 +525,7 @@ impl QobuzApi {
             tracks_count: response.tracks_count,
             duration: response.duration,
             release_date: response.release_date_original,
+            released_at: response.released_at,
             image: response.image.and_then(|i| i.large),
             image_cached: None,
             streamable: response.streamable,
@@ -547,6 +580,7 @@ impl QobuzApi {
             image: response.images300.and_then(|imgs| imgs.first().cloned()),
             image_cached: None,
             is_public: response.is_public,
+            updated_at: response.updated_at,
             owner: response.owner.map(|o| PlaylistOwner {
                 id: o.id.parse().unwrap_or(0),
                 name: o.name,
diff --git a/pmoqobuz/src/api/mod.rs b/pmoqobuz/src/api/mod.rs
index 19fc62f7..88acdd1b 100644
--- a/pmoqobuz/src/api/mod.rs
+++ b/pmoqobuz/src/api/mod.rs
@@ -17,6 +17,49 @@ use std::sync::RwLock;
 use std::time::Duration;
 use tracing::debug;
 
+/// Si la variable d'environnement `QOBUZ_DEBUG_DIR` est définie, sauvegarde
+/// le JSON brut de chaque réponse API dans ce dossier.
+fn debug_save_response(endpoint: &str, params: &[(&str, &str)], text: &str) {
+    let Ok(dir) = std::env::var("QOBUZ_DEBUG_DIR") else {
+        return;
+    };
+
+    let dir = std::path::Path::new(&dir);
+    if let Err(e) = std::fs::create_dir_all(dir) {
+        debug!("QOBUZ_DEBUG_DIR: cannot create dir: {}", e);
+        return;
+    }
+
+    // Construire un nom de fichier lisible : endpoint + params clés
+    let endpoint_slug = endpoint.trim_start_matches('/').replace('/', "_");
+    let param_slug: String = params
+        .iter()
+        .filter(|(k, _)| !["app_id", "user_auth_token", "request_ts", "request_sig"].contains(k))
+        .map(|(k, v)| format!("{}-{}", k, v.chars().take(20).collect::<String>()))
+        .collect::<Vec<_>>()
+        .join("_");
+
+    let ts = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .map(|d| d.as_millis())
+        .unwrap_or(0);
+
+    let filename = format!("{}_{}_{}.json", endpoint_slug, param_slug, ts);
+    let path = dir.join(&filename);
+
+    // Pretty-print si possible
+    let content = serde_json::from_str::<Value>(text)
+        .ok()
+        .and_then(|v| serde_json::to_string_pretty(&v).ok())
+        .unwrap_or_else(|| text.to_string());
+
+    if let Err(e) = std::fs::write(&path, content) {
+        debug!("QOBUZ_DEBUG_DIR: cannot write {}: {}", filename, e);
+    } else {
+        debug!("QOBUZ_DEBUG_DIR: saved {}", filename);
+    }
+}
+
 pub use spoofer::Spoofer;
 
 /// URL de base de l'API Qobuz
@@ -270,7 +313,7 @@ impl QobuzApi {
 
         // Envoyer la requête
         let response = request.send().await?;
-        self.handle_response(response, endpoint).await
+        self.handle_response(response, endpoint, params).await
     }
 
     /// Traite la réponse HTTP
@@ -278,6 +321,7 @@ impl QobuzApi {
         &self,
         response: Response,
         endpoint: &str,
+        params: &[(&str, &str)],
     ) -> Result<T> {
         let status = response.status();
         let status_code = status.as_u16();
@@ -294,6 +338,7 @@ impl QobuzApi {
         }
 
         let text = response.text().await?;
+        debug_save_response(endpoint, params, &text);
 
         // Vérifier si la réponse contient une erreur Qobuz
         if let Ok(json) = serde_json::from_str::<Value>(&text) {
diff --git a/pmoqobuz/src/models.rs b/pmoqobuz/src/models.rs
index 2eaf955a..50e81400 100644
--- a/pmoqobuz/src/models.rs
+++ b/pmoqobuz/src/models.rs
@@ -54,6 +54,9 @@ pub struct Album {
     /// Date de sortie (format ISO 8601)
     #[serde(default)]
     pub release_date: Option<String>,
+    /// Timestamp Unix de sortie (released_at)
+    #[serde(default)]
+    pub released_at: Option<i64>,
     /// URL de l'image de couverture
     #[serde(default)]
     pub image: Option<String>,
@@ -141,6 +144,9 @@ pub struct Playlist {
     /// Indique si c'est une playlist publique
     #[serde(default)]
     pub is_public: bool,
+    /// Timestamp de dernière modification (Unix epoch secondes)
+    #[serde(default)]
+    pub updated_at: Option<i64>,
     /// Propriétaire de la playlist
     #[serde(default)]
     pub owner: Option<PlaylistOwner>,
diff --git a/pmoqobuz/src/source.rs b/pmoqobuz/src/source.rs
index e73ec244..73a588ac 100644
--- a/pmoqobuz/src/source.rs
+++ b/pmoqobuz/src/source.rs
@@ -14,10 +14,9 @@ use pmosource::SourceCacheManager;
 use pmosource::{async_trait, BrowseResult, MusicSource, MusicSourceError, Result};
 use serde_json::json;
 use std::sync::Arc;
-use std::time::{Duration, SystemTime};
+use std::time::SystemTime;
 
 /// TTL pour les playlists d'albums (7 jours)
-const ALBUM_PLAYLIST_TTL: Duration = Duration::from_secs(7 * 24 * 3600);
 
 /// Trait pour les types dont on peut cacher la cover image.
 trait CoverCacheable {
@@ -563,54 +562,41 @@ impl QobuzSource {
     }
 
     /// Vérifie si une playlist d'album existe et est valide (non expirée ET non vide)
-    async fn is_album_playlist_valid(&self, playlist_id: &str) -> Result<bool> {
+    /// Retourne la source_version d'une pmoplaylist si elle existe en mémoire ou en DB.
+    async fn cached_source_version(&self, playlist_id: &str) -> Option<String> {
         let playlist_manager = pmoplaylist::PlaylistManager();
-
         if !playlist_manager.exists(playlist_id).await {
-            return Ok(false);
-        }
-
-        // Vérifier l'âge
-        match playlist_manager.get_playlist_age(playlist_id).await {
-            Ok(Some(age)) if age < ALBUM_PLAYLIST_TTL => {
-                // Playlist non expirée, vérifier qu'elle contient des tracks
-                match playlist_manager.get_read_handle(playlist_id).await {
-                    Ok(reader) => {
-                        let count = reader.remaining().await.unwrap_or(0);
-                        Ok(count > 0) // Valide seulement si non vide
-                    }
-                    Err(_) => Ok(false),
-                }
-            }
-            _ => Ok(false),
+            return None;
         }
+        playlist_manager
+            .get_read_handle(playlist_id)
+            .await
+            .ok()?
+            .source_version()
+            .await
     }
 
-    /// Adapte les Items d'une playlist pour correspondre au schéma UPnP Qobuz
-    async fn adapt_playlist_items_to_qobuz(
+    /// Adapte des Items DIDL issus d'une pmoplaylist pour le schéma UPnP Qobuz.
+    ///
+    /// - Résout l'ID de la track (`qobuz:track:<id>`) depuis les métadonnées cache
+    /// - Rend absolues les URLs relatives (resource + cover)
+    /// - Affecte le `parent_id` fourni
+    async fn adapt_items_to_qobuz(
         &self,
         items: Vec<Item>,
-        album_id: &str,
+        parent_id: &str,
     ) -> Result<Vec<Item>> {
         use tracing::warn;
 
-        let parent_id = format!("qobuz:album:{}", album_id);
-
         let mut adapted = Vec::with_capacity(items.len());
 
         for mut item in items {
-            // Extraire cache_pk depuis l'URL du resource
-            let cache_pk = if let Some(resource) = item.resources.first() {
-                resource
-                    .url
-                    .strip_prefix("/audio/flac/")
-                    .map(|s| s.to_string())
-            } else {
-                None
-            };
+            let cache_pk = item
+                .resources
+                .first()
+                .and_then(|r| r.url.strip_prefix("/audio/flac/").map(|s| s.to_string()));
 
             if let Some(pk) = cache_pk {
-                // Récupérer track_id depuis metadata
                 if let Ok(Some(track_id_value)) = self
                     .inner
                     .cache_manager
@@ -625,9 +611,6 @@ impl QobuzSource {
                     warn!("No qobuz_track_id metadata for {}", pk);
                 }
 
-                // Convertir URL relative en URL absolue
-                // From: /audio/flac/QOBUZ:123
-                // To: http://192.168.0.138:8080/audio/flac/QOBUZ:123
                 if let Some(resource) = item.resources.first_mut() {
                     if resource.url.starts_with('/') {
                         resource.url = format!("{}{}", self.inner.base_url, resource.url);
@@ -635,21 +618,59 @@ impl QobuzSource {
                 }
             }
 
-            // Convertir l'URL de la cover en URL absolue si elle est relative
             if let Some(art) = item.album_art.as_mut() {
                 if art.starts_with('/') {
                     *art = format!("{}{}", self.inner.base_url, art);
                 }
             }
 
-            item.parent_id = parent_id.clone();
+            item.parent_id = parent_id.to_string();
             adapted.push(item);
         }
 
         Ok(adapted)
     }
 
-    /// Récupère ou crée une playlist lazy pour un album
+    /// Ouvre un WriteHandle sur une pmoplaylist persistante, en la créant si absente
+    /// ou en la vidant (flush) si elle existe déjà.
+    async fn get_or_flush_playlist_writer(
+        &self,
+        playlist_id: &str,
+        role: pmoplaylist::PlaylistRole,
+    ) -> Result<pmoplaylist::WriteHandle> {
+        let playlist_manager = pmoplaylist::PlaylistManager();
+
+        if playlist_manager.exists(playlist_id).await {
+            let writer = playlist_manager
+                .get_persistent_write_handle(playlist_id.to_string())
+                .await
+                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+            writer
+                .flush()
+                .await
+                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+            Ok(writer)
+        } else {
+            playlist_manager
+                .create_persistent_playlist_with_role(playlist_id.to_string(), role)
+                .await
+                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))
+        }
+    }
+
+    /// Met en cache la cover si l'URL est présente.
+    async fn cache_cover_opt(&self, image_url: Option<&str>) -> Option<String> {
+        self.inner
+            .cache_manager
+            .cache_cover(image_url?)
+            .await
+            .ok()
+    }
+
+    /// Récupère ou crée une playlist lazy pour un album, avec invalidation par version.
+    ///
+    /// `source_version` = `"{released_at}_{tracks_count}"` — change uniquement en cas de
+    /// réédition avec pistes supplémentaires. Cache valide à vie si la version correspond.
     async fn get_or_create_album_playlist_items(
         &self,
         album_id: &str,
@@ -659,30 +680,11 @@ impl QobuzSource {
 
         let playlist_id = format!("qobuz-album-{}", album_id);
         let playlist_manager = pmoplaylist::PlaylistManager();
+        let parent_id = format!("qobuz:album:{}", album_id);
 
-        // Vérifier validité (existe ET non expirée)
-        let is_valid = self.is_album_playlist_valid(&playlist_id).await?;
+        let cached_version = self.cached_source_version(&playlist_id).await;
 
-        if is_valid {
-            debug!("Album playlist {} found and valid", playlist_id);
-
-            let reader = playlist_manager
-                .get_read_handle(&playlist_id)
-                .await
-                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
-
-            let items = reader
-                .to_items(limit)
-                .await
-                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
-
-            return self.adapt_playlist_items_to_qobuz(items, album_id).await;
-        }
-
-        // Playlist invalide/inexistante : (re)créer
-        info!("Album playlist {} creating/refreshing", playlist_id);
-
-        // 1. Métadonnées album
+        // Charger les métadonnées album (contient déjà les tracks)
         let album = self
             .inner
             .client
@@ -690,47 +692,49 @@ impl QobuzSource {
             .await
             .map_err(|e| MusicSourceError::BrowseError(e.to_string()))?;
 
-        // 2. Cache cover
-        let cover_pk = if let Some(ref image_url) = album.image {
-            self.inner.cache_manager.cache_cover(image_url).await.ok()
-        } else {
-            None
-        };
+        let album_version = Some(format!(
+            "{}_{}",
+            album.released_at.unwrap_or(0),
+            album.tracks_count.unwrap_or(0)
+        ));
 
-        // 3. Créer ou récupérer playlist
-        let writer = if playlist_manager.exists(&playlist_id).await {
-            let writer = playlist_manager
-                .get_persistent_write_handle(playlist_id.clone())
+        if cached_version.is_some() && cached_version == album_version {
+            debug!("Album playlist {} cache valid (version {:?})", playlist_id, album_version);
+            let reader = playlist_manager
+                .get_read_handle(&playlist_id)
                 .await
                 .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
-
-            writer
-                .flush()
+            let items = reader
+                .to_items(limit)
                 .await
                 .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+            return self.adapt_items_to_qobuz(items, &parent_id).await;
+        }
 
-            writer
-        } else {
-            playlist_manager
-                .create_persistent_playlist_with_role(
-                    playlist_id.clone(),
-                    pmoplaylist::PlaylistRole::Album,
-                )
-                .await
-                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?
-        };
+        info!("Album playlist {} creating/refreshing (version {:?})", playlist_id, album_version);
+
+        let cover_pk = self.cache_cover_opt(album.image.as_deref()).await;
+
+        let writer = self
+            .get_or_flush_playlist_writer(&playlist_id, pmoplaylist::PlaylistRole::Album)
+            .await?;
 
-        // 4. Métadonnées playlist
         writer
             .set_title(album.title.clone())
             .await
             .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
-
         writer
             .set_artist(Some(album.artist.name.clone()))
             .await
             .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
-
+        writer
+            .set_source(Some("qobuz".to_string()))
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        writer
+            .set_source_version(album_version)
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
         if let Some(pk) = cover_pk {
             writer
                 .set_cover_pk(Some(pk))
@@ -741,22 +745,122 @@ impl QobuzSource {
         // IMPORTANT: Libérer le write lock avant d'appeler add_album_to_playlist
         drop(writer);
 
-        // 5. Ajouter tracks (réutilise add_album_to_playlist existant)
         self.add_album_to_playlist(&playlist_id, album_id).await?;
 
-        // 6. Récupérer items
         let reader = playlist_manager
             .get_read_handle(&playlist_id)
             .await
             .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
-
         let items = reader
             .to_items(limit)
             .await
             .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
 
-        // 7. Adapter IDs
-        self.adapt_playlist_items_to_qobuz(items, album_id).await
+        self.adapt_items_to_qobuz(items, &parent_id).await
+    }
+
+    /// Récupère ou crée une pmoplaylist pour une playlist Qobuz, avec invalidation par updated_at.
+    ///
+    /// - Si la playlist est en cache et que `updated_at` n'a pas changé → retourne le cache.
+    /// - Sinon → recharge toutes les tracks depuis Qobuz et reconstruit la pmoplaylist.
+    async fn get_or_create_qobuz_playlist_items(
+        &self,
+        qobuz_playlist_id: &str,
+    ) -> Result<Vec<Item>> {
+        use tracing::{debug, info};
+
+        let pmo_playlist_id = format!("qobuz-playlist-{}", qobuz_playlist_id);
+        let playlist_manager = pmoplaylist::PlaylistManager();
+
+        let cached_version = self.cached_source_version(&pmo_playlist_id).await;
+
+        // Obtenir les métadonnées depuis Qobuz pour comparer updated_at
+        let qobuz_meta: crate::models::Playlist = self
+            .inner
+            .client
+            .get_playlist(qobuz_playlist_id)
+            .await
+            .map_err(|e: crate::error::QobuzError| MusicSourceError::BrowseError(e.to_string()))?;
+
+        let qobuz_version = qobuz_meta.updated_at.map(|t: i64| t.to_string());
+
+        // Cache valide si version correspond
+        let cache_valid = cached_version.is_some() && cached_version == qobuz_version;
+
+        let parent_id = format!("qobuz:playlist:{}", qobuz_playlist_id);
+
+        if cache_valid {
+            debug!("Qobuz playlist {} cache valid (version {:?})", pmo_playlist_id, qobuz_version);
+            let reader = playlist_manager
+                .get_read_handle(&pmo_playlist_id)
+                .await
+                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+            let (items, total) = reader
+                .to_items_paged(0, usize::MAX)
+                .await
+                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+            // Si des PKs ne sont pas enregistrés dans le cache audio (e.g. playlist créée
+            // avec l'ancien code), on force un refresh pour les ré-enregistrer proprement.
+            if items.len() == total {
+                return self.adapt_items_to_qobuz(items, &parent_id).await;
+            }
+            info!(
+                "Qobuz playlist {} has {}/{} valid items, forcing refresh to repair missing entries",
+                pmo_playlist_id, items.len(), total
+            );
+        }
+
+        info!("Qobuz playlist {} creating/refreshing (version {:?})", pmo_playlist_id, qobuz_version);
+
+        let tracks = self
+            .inner
+            .client
+            .get_playlist_tracks(qobuz_playlist_id)
+            .await
+            .map_err(|e| MusicSourceError::BrowseError(e.to_string()))?;
+
+        let cover_pk = self.cache_cover_opt(qobuz_meta.image.as_deref()).await;
+
+        let writer = self
+            .get_or_flush_playlist_writer(&pmo_playlist_id, pmoplaylist::PlaylistRole::Source)
+            .await?;
+
+        writer
+            .set_title(qobuz_meta.name.clone())
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        writer
+            .set_source(Some("qobuz".to_string()))
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        writer
+            .set_source_version(qobuz_version)
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        if let Some(pk) = cover_pk {
+            writer
+                .set_cover_pk(Some(pk))
+                .await
+                .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        }
+
+        let lazy_pks = self.register_tracks_lazy(&tracks).await;
+        writer
+            .push_lazy_batch(lazy_pks)
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        drop(writer);
+
+        let reader = playlist_manager
+            .get_read_handle(&pmo_playlist_id)
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+        let (items, _total) = reader
+            .to_items_paged(0, usize::MAX)
+            .await
+            .map_err(|e| MusicSourceError::PlaylistError(e.to_string()))?;
+
+        self.adapt_items_to_qobuz(items, &parent_id).await
     }
 
     /// Increment update counter (called on catalog changes)
@@ -937,6 +1041,104 @@ impl QobuzSource {
             .await
     }
 
+    /// Enregistre une liste de tracks comme lazy entries dans l'audio cache (en parallèle).
+    ///
+    /// Contrairement à `add_track_lazy`, cette méthode ne fait PAS d'appel à `get_stream_url`
+    /// (coûteux pour de grandes playlists). L'URL audio est résolue à la demande via
+    /// `QobuzLazyProvider` lors de la première lecture.
+    ///
+    /// Pour chaque track : cache la cover, enregistre la lazy entry, stocke les métadonnées.
+    /// Retourne la liste des lazy PKs enregistrés avec succès.
+    async fn register_tracks_lazy(&self, tracks: &[crate::models::Track]) -> Vec<String> {
+        // Limite la concurrence pour ne pas saturer l'API Qobuz ni la connexion réseau.
+        // Les covers déjà cachées sont retournées immédiatement (pas d'HTTP), donc même
+        // 600 tracks ne génèrent que ~N_albums_uniques téléchargements réels.
+        let sem = std::sync::Arc::new(tokio::sync::Semaphore::new(16));
+
+        // On attache l'index original à chaque future pour pouvoir retrier dans l'ordre
+        // d'origine après complétion parallèle (JoinSet retourne dans l'ordre de fin).
+        let futs: Vec<_> = tracks.iter().enumerate().map(|(idx, track)| {
+            let source = self.clone();
+            let sem = sem.clone();
+            let track_id = track.id.clone();
+            let track_title = track.title.clone();
+            let cover_image_url = track.album.as_ref().and_then(|a| a.image.clone());
+            let metadata = pmoaudiocache::AudioMetadata {
+                title: Some(track.title.clone()),
+                artist: track.performer.as_ref().map(|p| p.name.clone()),
+                album: track.album.as_ref().map(|a| a.title.clone()),
+                duration_secs: Some(track.duration as u64),
+                year: track.album.as_ref().and_then(|a| {
+                    a.release_date.as_ref().and_then(|d| d.split('-').next()?.parse().ok())
+                }),
+                track_number: Some(track.track_number),
+                track_total: track.album.as_ref().and_then(|a| a.tracks_count),
+                disc_number: Some(track.media_number),
+                disc_total: None,
+                genre: track.album.as_ref().and_then(|a| {
+                    if !a.genres.is_empty() { Some(a.genres.join(", ")) } else { None }
+                }),
+                sample_rate: track.sample_rate,
+                channels: track.channels,
+                bitrate: None,
+                conversion: None,
+            };
+            async move {
+                let _permit = sem.acquire().await.ok()?;
+                let lazy_pk = format!("QOBUZ:{}", track_id);
+
+                // 1. Cache cover eagerly
+                let cover_pk = if let Some(ref url) = cover_image_url {
+                    source.inner.cache_manager.cache_cover(url).await.ok()
+                } else {
+                    None
+                };
+
+                // 2. Register lazy entry + set cover_pk + seed metadata.
+                // Si le performer est absent (réponse API incomplète), on passe None pour
+                // que le provider appelle get_track et récupère les métadonnées complètes.
+                if metadata.artist.is_none() {
+                    tracing::warn!(
+                        "register_tracks_lazy: no performer for track {} (id={}), will call provider",
+                        track_title, track_id
+                    );
+                }
+                if cover_pk.is_none() && cover_image_url.is_some() {
+                    tracing::warn!(
+                        "register_tracks_lazy: cover download failed for track {} (id={}), will call provider for cover",
+                        track_title, track_id
+                    );
+                }
+                let meta_hint = if metadata.artist.is_some() { Some(metadata) } else { None };
+                match source.inner.cache_manager
+                    .cache_audio_lazy_with_provider(&lazy_pk, meta_hint, cover_pk)
+                    .await
+                {
+                    Ok(pk) => {
+                        let _ = source.inner.cache_manager.set_audio_metadata(
+                            &pk, "qobuz_track_id", json!(track_id),
+                        );
+                        Some((idx, pk))
+                    }
+                    Err(e) => {
+                        tracing::warn!("Failed to register lazy track {}: {}", track_title, e);
+                        None
+                    }
+                }
+            }
+        }).collect();
+
+        // Retrier par index original pour conserver l'ordre de la playlist Qobuz
+        let mut results: Vec<(usize, String)> = tokio::task::JoinSet::from_iter(futs)
+            .join_all()
+            .await
+            .into_iter()
+            .flatten()
+            .collect();
+        results.sort_unstable_by_key(|(i, _)| *i);
+        results.into_iter().map(|(_, pk)| pk).collect()
+    }
+
     /// Cache les covers d'une liste d'artistes en parallèle.
     async fn cache_artist_covers(&self, artists: Vec<crate::models::Artist>) -> Vec<crate::models::Artist> {
         let futs: Vec<_> = artists.into_iter().map(|mut artist| {
@@ -1623,22 +1825,9 @@ impl MusicSource for QobuzSource {
             }
 
             ObjectIdType::Playlist(playlist_id) => {
-                let tracks = self
-                    .inner
-                    .client
-                    .get_playlist_tracks(&playlist_id)
-                    .await
-                    .map_err(|e| MusicSourceError::BrowseError(e.to_string()))?;
-
-                let tracks = self.cache_covers(tracks).await;
-                let items: Vec<Item> = tracks
-                    .into_iter()
-                    .filter_map(|track| {
-                        track
-                            .to_didl_item(&format!("qobuz:playlist:{}", playlist_id))
-                            .ok()
-                    })
-                    .collect();
+                let items = self
+                    .get_or_create_qobuz_playlist_items(&playlist_id)
+                    .await?;
 
                 Ok(BrowseResult::Items(items))
             }
diff --git a/pmoradiofrance/src/metadata_cache.rs b/pmoradiofrance/src/metadata_cache.rs
index 0da2f191..53299e4a 100644
--- a/pmoradiofrance/src/metadata_cache.rs
+++ b/pmoradiofrance/src/metadata_cache.rs
@@ -26,9 +26,6 @@ use tokio::sync::RwLock;
 #[cfg(feature = "cache")]
 use pmocovers::Cache as CoverCache;
 
-#[cfg(feature = "cache")]
-use pmocache::cache_trait::FileCache;
-
 // ============================================================================
 // CachedMetadata
 // ============================================================================
@@ -583,11 +580,7 @@ impl MetadataCache {
                         }
                         Err(discover_err) => {
                             #[cfg(feature = "logging")]
-                            tracing::error!(
-                                "Rediscovery failed for '{}': {}",
-                                slug,
-                                discover_err
-                            );
+                            tracing::error!("Rediscovery failed for '{}': {}", slug, discover_err);
                             return Err(e);
                         }
                     }
@@ -697,12 +690,7 @@ impl MetadataCache {
         match self.client.rediscover_station(slug).await {
             Ok((id, url)) => {
                 #[cfg(feature = "logging")]
-                tracing::info!(
-                    "Re-discovered station '{}': id={}, url={}",
-                    slug,
-                    id,
-                    url
-                );
+                tracing::info!("Re-discovered station '{}': id={}, url={}", slug, id, url);
                 self.persist_station_mapping();
                 // Invalider le cache mémoire pour forcer un refresh des métadonnées
                 let mut cache = self.cache.write().await;
@@ -801,11 +789,18 @@ mod tests {
         assert!(base.is_expired());
 
         // end_time dans le futur → non expiré
-        let not_expired = CachedMetadata { end_time: Some(now + 3600), ..base.clone() };
+        let not_expired = CachedMetadata {
+            end_time: Some(now + 3600),
+            ..base.clone()
+        };
         assert!(!not_expired.is_expired());
 
         // Pas de end_time, fetched_at récent → non expiré (fallback TTL)
-        let no_end_fresh = CachedMetadata { end_time: None, fetched_at: now, ..base.clone() };
+        let no_end_fresh = CachedMetadata {
+            end_time: None,
+            fetched_at: now,
+            ..base.clone()
+        };
         assert!(!no_end_fresh.is_expired());
 
         // Pas de end_time, fetched_at ancien → expiré
diff --git a/pmosource/src/cache.rs b/pmosource/src/cache.rs
index 57c50742..fed929ac 100755
--- a/pmosource/src/cache.rs
+++ b/pmosource/src/cache.rs
@@ -328,6 +328,7 @@ impl SourceCacheManager {
             None
         };
 
+        let metadata_is_some = metadata.is_some();
         let mut final_metadata = metadata;
         if final_metadata.is_none() {
             if let Some(data) = provider_data.as_ref() {
@@ -352,10 +353,25 @@ impl SourceCacheManager {
 
         if let Some(meta) = final_metadata.as_ref() {
             self.seed_audio_metadata(lazy_pk, meta);
+        } else {
+            #[cfg(feature = "server")]
+            tracing::warn!(
+                "cache_audio_lazy_with_provider: no metadata to seed for {} \
+                 (meta_hint={}, provider_data={})",
+                lazy_pk,
+                metadata_is_some,
+                provider_data.as_ref().map(|d| d.metadata.is_some()).unwrap_or(false)
+            );
         }
 
         if let Some(cover_pk) = final_cover_pk {
             let _ = self.set_audio_metadata(lazy_pk, "cover_pk", json!(cover_pk));
+        } else {
+            #[cfg(feature = "server")]
+            tracing::debug!(
+                "cache_audio_lazy_with_provider: no cover_pk seeded for {}",
+                lazy_pk
+            );
         }
 
         Ok(lazy_pk.to_string())
diff --git a/version.txt b/version.txt
index e23fb32d..e01fa856 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.3.26
+0.3.27