From dcc350241e123fafec46582eb01e5823919f7e59 Mon Sep 17 00:00:00 2001
From: Raphix <picot.raphael@gmail.com>
Date: Thu, 8 Oct 2026 10:06:46 +0200
Subject: [PATCH] Version 2.1.0 - Update UI

---
 CHANGELOG.html                    |  23 +
 package.json                      |   2 +-
 src/discord/ServerSettings.js     |  56 +-
 src/lyrics/Lyrics.js              | 971 ++++++++++++++++++++++++++++--
 src/lyrics/urls.json              |   8 +-
 src/playlists/GuildPlaylists.js   | 310 ++++++++++
 src/playlists/PlaylistManager.js  | 404 ++++++++-----
 src/playlists/PlaylistUtils.js    | 341 +++++++++++
 src/server/Admin.js               | 136 ++++-
 src/server/Server.js              | 584 +++++++++++++++---
 src/utils/GlobalVars.js           |   2 +
 tests/dev/README.md               |   4 +-
 tests/dev/admin-config.test.js    |   3 +-
 tests/dev/admin-youtube.test.js   |   1 +
 tests/dev/guild-playlists.test.js | 336 +++++++++++
 tests/dev/lyrics.live.js          |  90 +++
 tests/dev/lyrics.test.js          | 390 ++++++++++++
 tests/dev/server-socket.test.js   | 177 +++++-
 18 files changed, 3508 insertions(+), 330 deletions(-)
 create mode 100644 src/playlists/GuildPlaylists.js
 create mode 100644 src/playlists/PlaylistUtils.js
 create mode 100644 tests/dev/guild-playlists.test.js
 create mode 100644 tests/dev/lyrics.live.js
 create mode 100644 tests/dev/lyrics.test.js

diff --git a/CHANGELOG.html b/CHANGELOG.html
index e1d0d82..128a835 100644
--- a/CHANGELOG.html
+++ b/CHANGELOG.html
@@ -1,4 +1,27 @@
 <div class="changelog-version changelog-actual">
+    <h2>Chopin - Version /*2.0.0*/</h2>
+    <p class="changelog-date">*_Date de sortie_*: *-07/10/2026-*</p>
+    <ul>
+        <li>/#[AJOUT][FRONTEND]#/ Paroles synchronisées du titre en cours : ligne active mise en avant, défilement automatique, clic sur une ligne pour s'y rendre, décalage réglable et recherche manuelle</li>
+        <li>/#[AJOUT][BACKEND]#/ Nouveau service de paroles : LRCLIB en priorité (paroles horodatées), repli sur lyrics.ovh</li>
+        <li>/#[AJOUT][FRONTEND]#/ Playlists partagées par serveur, activables par le propriétaire depuis « Gestion » (modification par tous les membres ou par les modérateurs)</li>
+        <li>/#[AJOUT][FRONTEND]#/ Tri des playlists (nom, dates, nombre de titres, durée) et ordre personnalisé par glisser-déposer</li>
+        <li>/#[AJOUT][FRONTEND]#/ Nouvelle fenêtre de création de playlist avec détection automatique du lien (YouTube, YouTube Music, Spotify, SoundCloud)</li>
+        <li>/#[AJOUT][FRONTEND]#/ Nouvel accueil : lecture en cours, accès rapides, écoutes récentes, statistiques du serveur et conseil du moment ; les nouveautés s'ouvrent dans une fenêtre dédiée</li>
+        <li>/#[AJOUT][FRONTEND]#/ Refonte du panneau d'administration : widgets regroupés par catégorie et navigation repensée</li>
+        <li>/#[AJOUT][FRONTEND]#/ Accessibilité : navigation complète au clavier, focus visible, fenêtres accessibles, meilleurs contrastes du thème clair et respect des animations réduites</li>
+        <li>/#[AJOUT][FRONTEND]#/ Panneau d'administration : comptes, serveurs, players, journaux, métriques, configuration et maintenance</li>
+        <li>/#[FIX][BACKEND]#/ Refonte de la lecture YouTube (yt-dlp tenu à jour, jetons PO, reprises automatiques) : fin des erreurs 403 et des vérifications « robot »</li>
+        <li>/#[AJOUT][BACKEND]#/ Connexion d'un compte YouTube par cookies depuis l'administration, avec vérification et test de lecture</li>
+        <li>/#[AJOUT][BACKEND]#/ Liaison du compte Google pour importer et synchroniser ses playlists YouTube, titres « J'aime » compris</li>
+        <li>/#[AJOUT][BACKEND]#/ Passage par le proxy Cloudflare WARP avec bascule automatique sur la connexion directe</li>
+        <li>/#[FIX][BACKEND]#/ Spotify : identifiants rechargés à chaud et conversion plus rapide des albums et playlists</li>
+        <li>/#[FIX][PLAYER]#/ Déplacement dans un titre plus fiable et reprise automatique en cas de coupure du flux</li>
+        <li>/#[FIX][BACKEND]#/ Stabilité du serveur : bannissements appliqués immédiatement, plantages corrigés, titres envoyés par le site vérifiés</li>
+    </ul>
+</div>
+
+<div class="changelog-version">
     <h2>Chopin - Version /*1.4.0*/</h2>
     <p class="changelog-date">*_Date de sortie_*: *-06/12/2025-*</p>
     <ul>
diff --git a/package.json b/package.json
index 88f4599..02b98e9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "chopin-backend",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "Discord Bot for music - Fetching everywhere !",
   "main": "src/main.js",
   "nodemonConfig": {
diff --git a/src/discord/ServerSettings.js b/src/discord/ServerSettings.js
index 6426cba..e07471a 100644
--- a/src/discord/ServerSettings.js
+++ b/src/discord/ServerSettings.js
@@ -39,6 +39,57 @@ function setSecureRole(guildId, role) {
     return true;
 }
 
+// Playlists partagées : désactivées par défaut ; "members" = tout membre peut les modifier, "mods" = modérateurs
+const SHARED_PLAYLISTS_EDITORS = ["members", "mods"];
+const SHARED_PLAYLISTS_DEFAULTS = Object.freeze({ enabled: false, editors: "members" });
+
+/**
+ * Réglage des playlists partagées d'un serveur. Lecture seule : valeurs par défaut pour un serveur inconnu
+ * ou une ancienne entrée (qui ne contient que secureRole), jamais d'écriture.
+ * @param {string} guildId
+ * @returns {{enabled: boolean, editors: "members"|"mods"}}
+ */
+function getSharedPlaylists(guildId) {
+    const result = { ...SHARED_PLAYLISTS_DEFAULTS };
+    if (typeof guildId !== "string" || guildId === "") return result;
+    const data = ServerDB.getData() || {};
+    if (!Object.prototype.hasOwnProperty.call(data, guildId)) return result;
+    const stored = data[guildId]?.sharedPlaylists;
+    if (!stored || typeof stored !== "object") return result;
+    if (typeof stored.enabled === "boolean") result.enabled = stored.enabled;
+    if (SHARED_PLAYLISTS_EDITORS.includes(stored.editors)) result.editors = stored.editors;
+    return result;
+}
+
+/**
+ * Modifie le réglage des playlists partagées (champs absents conservés).
+ * Désactiver ne supprime aucune playlist : elles sont seulement masquées jusqu'à la réactivation.
+ * @param {string} guildId
+ * @param {{enabled?: boolean, editors?: "members"|"mods"}} patch
+ * @returns {{enabled: boolean, editors: string}|null} nouveau réglage, null si les paramètres sont invalides
+ */
+function setSharedPlaylists(guildId, patch) {
+    if (typeof guildId !== "string" || !/^\d{1,25}$/.test(guildId)) {
+        clog.warn("Impossible de modifier les playlists partagées sans identifiant de serveur valide");
+        return null;
+    }
+    if (!patch || typeof patch !== "object" || Array.isArray(patch)) return null;
+    const hasEnabled = patch.enabled !== undefined;
+    const hasEditors = patch.editors !== undefined;
+    if (!hasEnabled && !hasEditors) return null;
+    if (hasEnabled && typeof patch.enabled !== "boolean") return null;
+    if (hasEditors && !SHARED_PLAYLISTS_EDITORS.includes(patch.editors)) return null;
+
+    const next = getSharedPlaylists(guildId);
+    if (hasEnabled) next.enabled = patch.enabled;
+    if (hasEditors) next.editors = patch.editors;
+    checkKey(guildId);
+    ServerDB.getData()[guildId].sharedPlaylists = { ...next };
+    ServerDB.save();
+    clog.log(`Playlists partagées du serveur ${guildId} : ${next.enabled ? "activées" : "désactivées"} (modification : ${next.editors === "mods" ? "modérateurs" : "tous les membres"})`);
+    return next;
+}
+
 function checkKey(guildId) {
     const data = ServerDB.getData();
     if (!data[guildId]) {
@@ -48,5 +99,8 @@ function checkKey(guildId) {
 
 module.exports = {
     getSecureRole,
-    setSecureRole
+    setSecureRole,
+    getSharedPlaylists,
+    setSharedPlaylists,
+    SHARED_PLAYLISTS_EDITORS
 };
diff --git a/src/lyrics/Lyrics.js b/src/lyrics/Lyrics.js
index ce2cd3d..533e39c 100644
--- a/src/lyrics/Lyrics.js
+++ b/src/lyrics/Lyrics.js
@@ -1,62 +1,923 @@
+/**
+ * Paroles des morceaux : LRCLIB (base libre, paroles synchronisées au format LRC) en priorité,
+ * puis l'ancienne chaîne Deezer (recherche) + lyrics.ovh (texte seul) en repli.
+ *
+ * Toutes les réponses publiques ont la forme « Result » :
+ *   {ok:true, songKey, source:"lrclib"|"lyrics.ovh", synced, lines:[{t,text}]|null, plain, instrumental, match}
+ *   {ok:false, error:"NO_MUSIC"|"NOT_FOUND"|"UNAVAILABLE"|"INVALID_PARAMS", songKey?}
+ */
 const { LogType } = require("loguix");
-const plog = new LogType('Lyrics');
-const urls = require('./urls.json');
+const { __glob } = require("../utils/GlobalVars");
+const { createLimiter, createCache } = require("../utils/Limiter");
+const urls = require("./urls.json");
 
-// Délai maximal de chaque requête : sans réponse du fournisseur, /PLAYER/LYRICS restait en attente indéfiniment
-const REQUEST_TIMEOUT = 8000
+const plog = new LogType("Lyrics");
 
-// Make sure Url exists and get lyrics for the first item only
-async function getLyrics(name) {
-    let result = null;
-    try {
-        const searchResponse = await fetch(`${urls.urlSearch}${encodeURIComponent(name)}`, {
-            method: 'GET',
-            headers: {
-                'content-type': 'application/json'
-            },
-            signal: AbortSignal.timeout(REQUEST_TIMEOUT)
-        });
-        const searchData = await searchResponse.json();
+const LRCLIB = String(urls.lrclib || "https://lrclib.net/api").replace(/\/+$/, "");
+// LRCLIB demande un User-Agent identifiant l'application
+const USER_AGENT = `Subsonics-Chopin/${__glob.VERSION || "dev"} (${urls.project || "https://git.raphix.fr/subsonics"})`;
 
-        // Check if data exists and has at least one item
-        if (searchData && searchData.data && searchData.data.length > 0) {
-            const firstItem = searchData.data[0];
-            const artist = firstItem.artist && firstItem.artist.name ? firstItem.artist.name : null;
-            const title = firstItem.title || null;
+// Délai maximal de chaque requête : sans réponse du fournisseur, la demande restait en attente indéfiniment
+const REQUEST_TIMEOUT = 8000;
+// Budget total d'une recherche (toutes sources confondues) : le client n'attend pas éternellement
+const LOOKUP_BUDGET = 20000;
+// En dessous, inutile de lancer une requête de plus
+const MIN_REQUEST_MS = 1000;
+// Écart de durée toléré pour garder la synchronisation (intro/outro des clips vidéo)
+const DURATION_WINDOW = 10;
+const MAX_QUERY = 200;
+const MAX_LINES = 3000;
+const MAX_PLAIN = 50000;
 
-            if (artist && title) {
-                try {
-                    const lyricsResponse = await fetch(`${urls.urlGet}${encodeURIComponent(artist)}/${encodeURIComponent(title)}`, {
-                        method: 'GET',
-                        headers: {
-                            'content-type': 'application/json'
-                        },
-                        signal: AbortSignal.timeout(REQUEST_TIMEOUT)
-                    });
-                    const lyricsData = await lyricsResponse.json();
-                    if (lyricsData && lyricsData.lyrics) {
-                        result = lyricsData.lyrics;
-                    } else {
-                        plog.error('Invalid response structure: ' + JSON.stringify(lyricsData).slice(0, 200));
-                        return null;
-                    }
-                } catch (error) {
-                    plog.error('Error fetching lyrics data: ' + (error?.message || error));
-                    return null;
-                }
-            } else {
-                plog.error('Artist or title missing in search result');
-                return null;
-            }
-        } else {
-            plog.error('No search results found');
-            return null;
-        }
-    } catch (error) {
-        plog.error('Error fetching search data: ' + (error?.message || error));
-        return null;
-    }
-    return result;
+const MINUTE = 60 * 1000;
+const HOUR = 60 * MINUTE;
+
+// Même politesse que pour YouTube : 2 requêtes simultanées, 250 ms entre deux démarrages
+const limiter = createLimiter(2, { minIntervalMs: 250 });
+// Clé = requête normalisée (artiste|titre|durée) : deux vidéos du même morceau partagent le résultat
+const lookupCache = createCache({ ttlMs: 6 * HOUR, max: 1000 });
+const idCache = createCache({ ttlMs: 6 * HOUR, max: 300 });
+const searchCache = createCache({ ttlMs: 10 * MINUTE, max: 200 });
+
+// Trouvé : 6 h ; introuvable : 20 min (une saisie LRCLIB peut arriver) ; service injoignable : 1 min
+function ttlForResult(result) {
+    if (!result) return 0;
+    if (result.ok) return 6 * HOUR;
+    if (result.error === "NOT_FOUND") return 20 * MINUTE;
+    if (result.error === "UNAVAILABLE") return MINUTE;
+    return 0;
 }
 
-module.exports = { getLyrics };
+// ---------------------------------------------------------------------------------------------
+// Analyse LRC
+// ---------------------------------------------------------------------------------------------
+
+// [mm:ss], [mm:ss.x], [mm:ss.xx], [mm:ss.xxx] (séparateur « . », « , » ou « : » pour la fraction)
+const TIME_TAG = /^\[(\d{1,3}):(\d{1,2})(?:[.,:](\d{1,3}))?\]/;
+const META_TAG = /^\[([a-z#]+):([^\]]*)\]\s*$/i;
+// Horodatage par mot du format LRC « enrichi » : <mm:ss.xx>
+const WORD_TAG = /<\d{1,3}:\d{1,2}(?:[.,:]\d{1,3})?>/g;
+
+/**
+ * Convertit un texte LRC en lignes horodatées triées.
+ * Gère plusieurs horodatages par ligne, [offset:±ms], les balises de métadonnées (ignorées)
+ * et conserve les lignes vides horodatées (pauses) avec text:"".
+ * @param {string} text
+ * @returns {{t:number, text:string}[]}
+ */
+function parseLrc(text) {
+    if (typeof text !== "string" || !text) return [];
+    let offset = 0;
+    const entries = [];
+    let index = 0;
+    for (const rawLine of text.split(/\r\n|\r|\n/)) {
+        let line = rawLine.replace(/^/, "").trim();
+        if (!line) continue;
+
+        const times = [];
+        let match;
+        while ((match = TIME_TAG.exec(line))) {
+            const minutes = Number(match[1]);
+            const seconds = Number(match[2]);
+            if (seconds < 60) {
+                const fraction = match[3] ? Number(match[3].padEnd(3, "0")) : 0;
+                times.push(minutes * 60000 + seconds * 1000 + fraction);
+            }
+            line = line.slice(match[0].length).trimStart();
+        }
+
+        if (times.length === 0) {
+            // Balise de métadonnées : seul l'offset nous intéresse
+            const meta = META_TAG.exec(line);
+            if (meta && meta[1].toLowerCase() === "offset") {
+                const value = Number(meta[2].trim());
+                if (Number.isFinite(value)) offset = value;
+            }
+            continue;
+        }
+
+        const content = line.replace(WORD_TAG, "").replace(/\s+/g, " ").trim();
+        for (const t of times) entries.push({ t, text: content, index: index++ });
+        if (entries.length >= MAX_LINES) break;
+    }
+
+    // Offset positif = paroles affichées plus tôt (convention LRC)
+    return entries
+        .map(entry => ({ t: Math.max(0, Math.round(entry.t - offset)), text: entry.text, index: entry.index }))
+        .sort((a, b) => a.t - b.t || a.index - b.index)
+        .map(({ t, text: content }) => ({ t, text: content }));
+}
+
+// Texte brut propre : fins de ligne unifiées, au plus une ligne vide consécutive
+function normalizePlain(text) {
+    if (typeof text !== "string") return null;
+    const clean = text
+        .replace(/\r\n|\r/g, "\n")
+        .split("\n")
+        .map(line => line.trim())
+        .join("\n")
+        .replace(/\n{3,}/g, "\n\n")
+        .trim();
+    if (!clean) return null;
+    return clean.length > MAX_PLAIN ? clean.slice(0, MAX_PLAIN) : clean;
+}
+
+function linesToPlain(lines) {
+    return normalizePlain(lines.map(line => line.text).join("\n"));
+}
+
+// ---------------------------------------------------------------------------------------------
+// Nettoyage des titres / artistes (titres YouTube, chaînes VEVO / « - Topic »…)
+// ---------------------------------------------------------------------------------------------
+
+// Contenu d'une parenthèse ou d'un suffixe « - … » qui ne fait pas partie du titre
+const NOISE = /(?:^|[^\p{L}\p{N}])(?:official|officiel(?:le)?|video|vid[ée]o|clip|audio|lyrics?|paroles?|visuali[sz]er|hd|hq|uhd|4k|8k|\d{3,4}p|remaster(?:ed)?|remasteris[ée]e?|mv|m\/v|explicit|clean|radio edit|single version|album version|version (?:originale|officielle)|feat\.?|ft\.?|featuring|prod\.?(?: by)?|out now|free download|color coded|full album)(?=$|[^\p{L}\p{N}])/iu;
+// Suffixe après tiret qui désigne une version du même morceau (on le retire pour la recherche)
+const VERSION_SUFFIX = /^(?:\d{4}\s+)?(?:live|remaster(?:ed)?|version|edit|radio|acoustic|acoustique|from|bonus|demo|mono|stereo|st[ée]r[ée]o|instrumental|extended|original|single|album|mix|remix|re-?recorded|sped up|slowed|taylor'?s version)\b/i;
+const NOISE_ALL = new RegExp(NOISE.source, "giu");
+// Mots de liaison tolérés dans un suffixe parasite (« Official Music Video », « Remastered 2011 »)
+const FILLER = new Set(["music", "musical", "new", "the", "with", "and", "et", "in", "by", "version", "full", "video", "audio"]);
+const FEAT = /\s+(?:feat\.?|ft\.?|featuring)\s+[^-–—()[\]{}]*/gi;
+const EXTENSION = /\.(?:mp3|flac|wav|ogg|oga|m4a|opus|webm|aac|wma|alac|aiff?|mp4|mkv|mov)$/i;
+const SEPARATOR = /\s+[-–—]\s+/;
+const PLACEHOLDERS = new Set(["aucun titre", "auteur inconnu", "aucun fichier"]);
+
+function capText(value) {
+    return value.length > MAX_QUERY ? value.slice(0, MAX_QUERY).trim() : value;
+}
+
+function tidy(value) {
+    return value
+        .replace(/\s+/g, " ")
+        .replace(/^[\s\-–—|:,;~/·•*]+|[\s\-–—|:,;~/·•*]+$/g, "")
+        .trim();
+}
+
+// Un suffixe « - … » n'est retiré que s'il ne contient QUE du bruit :
+// « - Official Video » oui, « The Buggles - Video Killed the Radio Star » non
+function isNoiseSegment(segment) {
+    if (!NOISE.test(segment)) return false;
+    const rest = normalizeText(` ${segment} `.replace(NOISE_ALL, " "));
+    return rest.split(" ").every(word => !word || FILLER.has(word) || /^\d{1,4}$/.test(word));
+}
+
+// Retire le bruit « structurel » (crochets, parenthèses parasites, suffixes, émojis) sans toucher aux « feat. »
+// ni au séparateur « Artiste - Titre » : sert avant le découpage
+function stripNoise(input) {
+    let value = String(input)
+        .replace(/\p{Extended_Pictographic}|️/gu, " ")
+        // Crochets : toujours du bruit ([HD], [Official Video], 【MV】…)
+        .replace(/\[[^\]]*\]|【[^】]*】|〖[^〗]*〗/g, " ")
+        .replace(/(^|\s)#[\p{L}\p{N}_]+/gu, " ");
+
+    // Parenthèses / accolades parasites (on garde « (Remix) », « (Live) », « (Don't Fear) The Reaper »…)
+    value = value.replace(/[(（{]([^()（）{}]*)[)）}]/g, (all, inner) => (NOISE.test(inner) ? " " : all));
+
+    // Tout ce qui suit « | » ou « // » est de la description (« Titre | Clip officiel »)
+    value = value.replace(/\s+(?:\||｜|\/\/)\s+.*$/, "");
+
+    // Suffixes « - Official Video », « - Remastered 2011 »…
+    let previous;
+    do {
+        previous = value;
+        value = value.replace(/\s+[-–—]\s+([^-–—]+)$/, (all, segment) => (isNoiseSegment(segment) ? "" : all));
+        value = value.replace(/\s+(?:official\s+(?:music\s+)?video|official\s+audio|official\s+lyric\s+video|lyric\s+video|lyrics|clip\s+officiel|audio\s+officiel|vid[ée]o\s+officielle|hd|hq|4k)\s*$/i, "");
+    } while (value !== previous);
+
+    return tidy(value.replace(/["“”«»„]/g, " "));
+}
+
+/**
+ * Nettoie un titre pour la recherche : (Official Video), [HD], « feat. X », « - Remastered 2011 »…
+ * @param {string} str
+ * @returns {string}
+ */
+function cleanTitle(str) {
+    if (str === undefined || str === null) return "";
+    const original = tidy(String(str));
+    if (!original) return "";
+    const cleaned = tidy(stripNoise(original).replace(FEAT, " "));
+    return capText(cleaned || original);
+}
+
+/**
+ * Nettoie un nom d'artiste / de chaîne : « Artist - Topic », « ArtistVEVO », « Artist Official »…
+ * @param {string} str
+ * @returns {string}
+ */
+function cleanArtist(str) {
+    if (str === undefined || str === null) return "";
+    let value = tidy(String(str).replace(/\p{Extended_Pictographic}|️/gu, " "));
+    if (!value || PLACEHOLDERS.has(value.toLowerCase())) return "";
+    const original = value;
+
+    value = value.replace(/\s*[-–—]\s*topic$/i, "");
+    const vevo = /vevo$/i.test(value);
+    value = value.replace(/\s*vevo$/i, "");
+    // « DaftPunkVEVO » → « Daft Punk »
+    if (vevo && !/\s/.test(value)) value = value.replace(/(\p{Ll})(\p{Lu})/gu, "$1 $2");
+    value = value.replace(/\s*[[(][^\])]*\b(?:official|officiel(?:le)?)\b[^\])]*[\])]/gi, " ");
+    value = value.replace(/\s+(?:official(?:\s+(?:artist\s+)?channel)?|officiel(?:le)?|channel|cha[iî]ne\s+officielle)$/i, "");
+    value = value.replace(/\s+(?:feat\.?|ft\.?|featuring)\s+.*$/i, "");
+    value = tidy(value);
+    return capText(value || original);
+}
+
+// ---------------------------------------------------------------------------------------------
+// Similarité
+// ---------------------------------------------------------------------------------------------
+
+function normalizeText(value) {
+    return String(value || "")
+        .normalize("NFKD")
+        .replace(/[̀-ͯ]/g, "")
+        .toLowerCase()
+        .replace(/&/g, " and ")
+        .replace(/['’`´]/g, "")
+        .replace(/[^\p{L}\p{N}]+/gu, " ")
+        .trim();
+}
+
+function tokenSet(value) {
+    const normalized = normalizeText(value);
+    return new Set(normalized ? normalized.split(" ") : []);
+}
+
+// 1 = identique ; inclusion complète d'un côté dans l'autre = 0.6–0.9 selon la différence de longueur
+function similarity(a, b) {
+    const na = normalizeText(a);
+    const nb = normalizeText(b);
+    if (!na || !nb) return 0;
+    if (na === nb) return 1;
+    if (na.replace(/ /g, "") === nb.replace(/ /g, "")) return 0.95;
+    const A = tokenSet(na);
+    const B = tokenSet(nb);
+    let common = 0;
+    for (const token of A) if (B.has(token)) common++;
+    if (!common) return 0;
+    const dice = (2 * common) / (A.size + B.size);
+    const small = Math.min(A.size, B.size);
+    const large = Math.max(A.size, B.size);
+    const contained = common === small ? 0.6 + 0.3 * (small / large) : 0;
+    return Math.max(dice, contained);
+}
+
+// Part des mots de `part` présents dans `whole` (recherche en texte libre)
+function coverage(part, whole) {
+    const P = tokenSet(part);
+    const W = whole instanceof Set ? whole : tokenSet(whole);
+    if (!P.size) return 0;
+    let found = 0;
+    for (const token of P) if (W.has(token)) found++;
+    return found / P.size;
+}
+
+// ---------------------------------------------------------------------------------------------
+// Requête à partir d'un morceau
+// ---------------------------------------------------------------------------------------------
+
+function toDuration(value) {
+    const number = Number(value);
+    return Number.isFinite(number) && number > 0 && number < 86400 ? Math.round(number) : 0;
+}
+
+function textField(value) {
+    if (typeof value !== "string" && typeof value !== "number") return "";
+    const text = String(value).trim();
+    return PLACEHOLDERS.has(text.toLowerCase()) ? "" : text;
+}
+
+function looksLike(part, artist) {
+    if (!part || !artist) return false;
+    if (similarity(part, artist) >= 0.6) return true;
+    const np = normalizeText(part).replace(/ /g, "");
+    const na = normalizeText(artist).replace(/ /g, "");
+    return !!np && !!na && (np.includes(na) || na.includes(np));
+}
+
+/**
+ * Devine {track, artist, duration} pour la recherche de paroles.
+ * Les titres YouTube « Artiste - Titre (Official Video) » sont découpés ; les morceaux convertis
+ * depuis Spotify (titre et artiste déjà propres) passent quasiment inchangés.
+ * @param {{title?:string, author?:string, duration?:number, type?:string}} song
+ * @returns {{track:string, artist:string, duration:number}}
+ */
+function guessQuery(song) {
+    const source = song && typeof song === "object" ? song : {};
+    let title = textField(source.title);
+    const author = textField(source.author);
+    const duration = toDuration(source.duration);
+
+    // Fichiers envoyés : « 01 - Artiste - Titre.mp3 », « artiste_titre.flac »
+    if (source.type === "attachment" || EXTENSION.test(title)) {
+        title = title.replace(EXTENSION, "").replace(/_/g, " ").replace(/^(?:\d{1,3}\s*[-.)]\s*|0\d\s+)(?=\S)/, "");
+    }
+
+    let artist = cleanArtist(author);
+    let rough = stripNoise(title);
+    let track = "";
+
+    // Artiste "Titre" / Artiste « Titre » (seulement si la partie gauche est bien l'artiste,
+    // sinon « Theme from "Shaft" » perdrait son titre)
+    const quoted = /^(.+?)\s+["“«]\s*(.+?)\s*["”»]/.exec(title);
+    if (!SEPARATOR.test(rough) && quoted && (!artist || looksLike(quoted[1], artist))) {
+        artist = cleanArtist(quoted[1]) || artist;
+        rough = stripNoise(quoted[2]);
+    }
+
+    const parts = rough.split(SEPARATOR);
+    if (parts.length >= 2) {
+        const left = parts[0];
+        const right = parts.slice(1).join(" - ");
+        if (artist && looksLike(left, artist)) {
+            // « Artiste - Titre » avec l'artiste déjà connu (le titre est plus fiable que la chaîne)
+            artist = cleanArtist(left) || artist;
+            track = right;
+        } else if (artist && looksLike(right, artist)) {
+            // « Titre - Artiste »
+            track = left;
+        } else if (VERSION_SUFFIX.test(right.trim())) {
+            // « Titre - Live at Wembley » (style Spotify) : on garde le titre
+            track = left;
+        } else {
+            // Chaîne de label / inconnue : on fait confiance au titre de la vidéo
+            artist = cleanArtist(left) || artist;
+            track = right;
+        }
+    } else {
+        track = rough;
+    }
+
+    track = cleanTitle(track) || cleanTitle(title);
+    return { track: capText(track), artist: capText(artist), duration };
+}
+
+/**
+ * Clé identifiant un morceau côté client : `${type}:${id}`, sinon l'URL, sinon null.
+ * @param {object} song
+ * @returns {string|null}
+ */
+function songKeyOf(song) {
+    if (!song || typeof song !== "object") return null;
+    const id = typeof song.id === "number" ? String(song.id) : song.id;
+    if (typeof id === "string" && id) return `${song.type}:${id}`;
+    if (typeof song.url === "string" && song.url) return song.url;
+    return null;
+}
+
+// ---------------------------------------------------------------------------------------------
+// HTTP
+// ---------------------------------------------------------------------------------------------
+
+class SourceError extends Error {
+    constructor(code, message) {
+        super(message || code);
+        this.code = code;
+    }
+}
+
+function describe(error) {
+    if (!error) return "erreur inconnue";
+    if (error.code && error instanceof SourceError) return error.message;
+    if (error.name === "TimeoutError" || error.name === "AbortError") return "délai dépassé";
+    return error.cause?.code || error.message || String(error);
+}
+
+const RETRY_DELAY = 600;
+const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms));
+
+function isRetryable(error) {
+    if (error instanceof SourceError) return error.retryable === true;
+    // Coupure réseau ponctuelle oui, délai dépassé non (on doublerait l'attente)
+    return !!error && error.name !== "TimeoutError" && error.name !== "AbortError";
+}
+
+/**
+ * GET JSON limité (concurrence + espacement), avec délai. 404 → {status:404, data:null}.
+ * Une seule nouvelle tentative après un 429/5xx ou une coupure réseau (LRCLIB renvoie parfois un 503 passager).
+ * @returns {Promise<{status:number, data:any}>}
+ */
+async function getJson(url, ctx, attempt = 0) {
+    try {
+        return await getJsonOnce(url, ctx);
+    } catch (error) {
+        const remaining = ctx ? ctx.deadline - Date.now() : REQUEST_TIMEOUT;
+        if (attempt > 0 || !isRetryable(error) || remaining < MIN_REQUEST_MS + RETRY_DELAY) throw error;
+        await sleep(RETRY_DELAY);
+        return getJson(url, ctx, attempt + 1);
+    }
+}
+
+async function getJsonOnce(url, ctx) {
+    const remaining = ctx ? ctx.deadline - Date.now() : REQUEST_TIMEOUT;
+    if (remaining < MIN_REQUEST_MS) throw new SourceError("BUDGET", "budget de recherche épuisé");
+    return limiter.run(async () => {
+        const left = ctx ? ctx.deadline - Date.now() : REQUEST_TIMEOUT;
+        if (left < MIN_REQUEST_MS) throw new SourceError("BUDGET", "budget de recherche épuisé");
+        const response = await fetch(url, {
+            method: "GET",
+            headers: { "User-Agent": USER_AGENT, "Accept": "application/json" },
+            signal: AbortSignal.timeout(Math.min(REQUEST_TIMEOUT, left)),
+        });
+        if (response.status === 404) {
+            // Libère la connexion
+            await response.text().catch(() => {});
+            return { status: 404, data: null };
+        }
+        if (!response.ok) {
+            await response.text().catch(() => {});
+            const failure = new SourceError("HTTP", `HTTP ${response.status}`);
+            failure.retryable = response.status === 429 || response.status >= 500;
+            throw failure;
+        }
+        let data;
+        try {
+            data = await response.json();
+        } catch {
+            throw new SourceError("BAD_JSON", "réponse illisible");
+        }
+        return { status: response.status, data };
+    });
+}
+
+function newContext() {
+    return { deadline: Date.now() + LOOKUP_BUDGET, lrclibDown: false };
+}
+
+// ---------------------------------------------------------------------------------------------
+// LRCLIB
+// ---------------------------------------------------------------------------------------------
+
+function isRecord(value) {
+    return !!value && typeof value === "object" && !Array.isArray(value) && value.id !== undefined;
+}
+
+// En dessous, l'entrée est un essai / du vandalisme (vu en vrai : « [00:00.00]probe »)
+const MIN_LYRIC_LINES = 3;
+const ANY_TIME_TAG = /\[\d{1,3}:\d{1,2}(?:[.,:]\d{1,3})?\]|<\d{1,3}:\d{1,2}(?:[.,:]\d{1,3})?>/g;
+
+function lyricLineCount(text) {
+    if (typeof text !== "string") return 0;
+    let count = 0;
+    for (const line of text.split(/\r\n|\r|\n/)) {
+        const content = line.replace(ANY_TIME_TAG, "").trim();
+        // Les balises de métadonnées [ar:…] ne comptent pas
+        if (content && !META_TAG.test(content)) count++;
+    }
+    return count;
+}
+
+function hasSynced(record) {
+    return lyricLineCount(record.syncedLyrics) >= MIN_LYRIC_LINES;
+}
+
+function hasPlain(record) {
+    return lyricLineCount(record.plainLyrics) >= MIN_LYRIC_LINES;
+}
+
+function hasContent(record) {
+    return record.instrumental === true || hasSynced(record) || hasPlain(record);
+}
+
+function matchOf(record) {
+    return {
+        id: record.id,
+        track: String(record.trackName || record.name || ""),
+        artist: String(record.artistName || ""),
+        album: String(record.albumName || ""),
+        duration: toDuration(record.duration),
+    };
+}
+
+/**
+ * Construit un Result depuis un enregistrement LRCLIB.
+ * Si la durée du morceau s'écarte de plus de DURATION_WINDOW secondes, la synchronisation serait
+ * fausse (intro d'un clip…) : on ne renvoie alors que le texte.
+ */
+function resultFromRecord(record, query) {
+    if (!isRecord(record) || !hasContent(record)) return null;
+    const instrumental = record.instrumental === true;
+    const parsed = hasSynced(record) ? parseLrc(record.syncedLyrics) : [];
+    const timed = parsed.filter(line => line.text).length >= MIN_LYRIC_LINES;
+    const expected = query ? toDuration(query.duration) : 0;
+    const actual = toDuration(record.duration);
+    const durationOk = !expected || !actual || Math.abs(expected - actual) <= DURATION_WINDOW;
+    const synced = !instrumental && timed && durationOk;
+    const plain = instrumental ? null : ((hasPlain(record) ? normalizePlain(record.plainLyrics) : null) || (timed ? linesToPlain(parsed) : null));
+    if (!instrumental && !synced && !plain) return null;
+    return {
+        ok: true,
+        songKey: null,
+        source: "lrclib",
+        synced,
+        lines: synced ? parsed : null,
+        plain,
+        instrumental,
+        match: matchOf(record),
+    };
+}
+
+/**
+ * Note un candidat (LRCLIB ou Deezer normalisé {trackName, artistName, duration, …}).
+ * @returns {{score:number, inWindow:boolean}|null} null = candidat rejeté
+ */
+function scoreCandidate(candidate, query) {
+    if (!candidate || typeof candidate !== "object") return null;
+    const rawTrack = String(candidate.trackName || candidate.name || "");
+    const candTrack = cleanTitle(rawTrack);
+    const candArtist = String(candidate.artistName || "");
+    if (!candTrack) return null;
+
+    const expected = toDuration(query.duration);
+    const actual = toDuration(candidate.duration);
+    let durScore = 0.5;
+    let inWindow = true;
+    let delta = null;
+    if (expected && actual) {
+        delta = Math.abs(expected - actual);
+        inWindow = delta <= DURATION_WINDOW;
+        durScore = delta <= 2 ? 1 : inWindow ? 1 - (delta - 2) / 16 : 0.1;
+    } else if (expected) {
+        inWindow = false;
+    }
+
+    let score;
+    if (query.artist) {
+        const tSim = Math.max(
+            similarity(query.track, candTrack),
+            // Saisies « Artiste - Titre » dans le champ titre
+            similarity(`${query.artist} ${query.track}`, candTrack)
+        );
+        const aSim = Math.max(similarity(query.artist, candArtist), similarity(query.artist, rawTrack) >= 0.6 ? 0.6 : 0);
+        if (tSim < 0.5) return null;
+        if (aSim < 0.3 && !(tSim >= 0.9 && delta !== null && delta <= 3)) return null;
+        score = 2 * tSim + 1.5 * aSim + 2 * durScore;
+    } else {
+        // Texte libre : les mots du candidat doivent se retrouver dans la requête
+        const words = tokenSet(query.track);
+        const tCov = coverage(candTrack, words);
+        const aCov = coverage(candArtist, words);
+        const qCov = coverage(query.track, tokenSet(`${candArtist} ${candTrack}`));
+        if (tCov < 0.75 || qCov < 0.5) return null;
+        score = 2 * tCov + aCov + 1.5 * qCov + 2 * durScore;
+    }
+
+    if (hasSynced(candidate)) score += 0.6;
+    else if (hasPlain(candidate)) score += 0.2;
+    // Saisies d'internautes « Artiste - Titre (Official Video) » : souvent moins bien calées
+    if (candTrack !== tidy(rawTrack)) score -= 0.2;
+    // « Artiste - Titre » dans le champ titre (en recherche libre, comparé à l'artiste du candidat)
+    else if (SEPARATOR.test(rawTrack) && looksLike(rawTrack.split(SEPARATOR)[0], query.artist || candArtist)) score -= 0.2;
+    return { score, inWindow };
+}
+
+/**
+ * Choisit le meilleur candidat : d'abord ceux dans la fenêtre de durée, puis le meilleur score
+ * (paroles synchronisées favorisées, durée la plus proche, similarité titre/artiste).
+ * @param {object[]} candidates
+ * @param {{track:string, artist:string, duration:number}} query
+ * @param {{requireContent?: boolean}} [options]
+ * @returns {object|null}
+ */
+function pickBestCandidate(candidates, query, options = {}) {
+    const requireContent = options.requireContent !== false;
+    let best = null;
+    for (const candidate of Array.isArray(candidates) ? candidates : []) {
+        if (requireContent && (!isRecord(candidate) || !hasContent(candidate))) continue;
+        const rated = scoreCandidate(candidate, query);
+        if (!rated) continue;
+        if (!best
+            || (rated.inWindow && !best.inWindow)
+            || (rated.inWindow === best.inWindow && rated.score > best.score)) {
+            best = { candidate, ...rated };
+        }
+    }
+    return best ? best.candidate : null;
+}
+
+async function lrclibCall(path, params, ctx) {
+    const search = new URLSearchParams();
+    for (const [key, value] of Object.entries(params || {})) {
+        if (value !== undefined && value !== null && value !== "") search.set(key, String(value));
+    }
+    const query = search.toString();
+    try {
+        return await getJson(`${LRCLIB}${path}${query ? "?" + query : ""}`, ctx);
+    } catch (error) {
+        if (ctx) ctx.lrclibDown = true;
+        plog.warn(`LRCLIB injoignable (${path}) : ${describe(error)}`);
+        throw error;
+    }
+}
+
+async function lrclibSearch(params, ctx) {
+    const { status, data } = await lrclibCall("/search", params, ctx);
+    if (status === 404 || !Array.isArray(data)) return [];
+    return data.filter(isRecord).slice(0, 20);
+}
+
+async function lookupLrclib(query, ctx) {
+    const candidates = [];
+    const seen = new Set();
+    const add = (list) => {
+        for (const record of list) {
+            if (seen.has(record.id)) continue;
+            seen.add(record.id);
+            candidates.push(record);
+        }
+    };
+
+    if (query.artist) {
+        // 1. Correspondance exacte (durée ignorée si inconnue / direct)
+        const { status, data } = await lrclibCall("/get", {
+            artist_name: query.artist,
+            track_name: query.track,
+            duration: query.duration || undefined,
+        }, ctx);
+        if (status !== 404 && isRecord(data) && hasContent(data)) {
+            const rated = scoreCandidate(data, query);
+            if (!query.duration || (rated && rated.inWindow)) return data;
+            add([data]);
+        }
+        // 2. Recherche par champs
+        add(await lrclibSearch({ track_name: query.track, artist_name: query.artist }, ctx));
+        const best = pickBestCandidate(candidates, query);
+        if (best && scoreCandidate(best, query).inWindow) return best;
+    }
+
+    // 3. Recherche libre « artiste titre »
+    add(await lrclibSearch({ q: query.artist ? `${query.artist} ${query.track}` : query.track }, ctx));
+    return pickBestCandidate(candidates, query);
+}
+
+// ---------------------------------------------------------------------------------------------
+// Repli : Deezer (recherche) + lyrics.ovh (texte seul)
+// ---------------------------------------------------------------------------------------------
+
+async function fetchOvh(artist, track, ctx) {
+    const { status, data } = await getJson(`${urls.urlGet}${encodeURIComponent(artist)}/${encodeURIComponent(track)}`, ctx);
+    if (status === 404 || !data || typeof data.lyrics !== "string") return null;
+    // lyrics.ovh préfixe parfois « Paroles de la chanson X par Y »
+    return normalizePlain(data.lyrics.replace(/^\s*Paroles de la chanson .+ par .+(?:\r\n|\r|\n)/i, ""));
+}
+
+async function lookupLegacy(query, ctx) {
+    let pick = null;
+    try {
+        const text = query.artist ? `${query.artist} ${query.track}` : query.track;
+        const { data } = await getJson(`${urls.urlSearch}${encodeURIComponent(text)}`, ctx);
+        if (data && data.error) throw new SourceError("DEEZER", "Deezer : " + String(data.error.message || data.error.type || "erreur"));
+        const hits = (data && Array.isArray(data.data) ? data.data : []).map(hit => ({
+            id: hit?.id,
+            trackName: hit?.title_short || hit?.title || "",
+            artistName: hit?.artist?.name || "",
+            albumName: hit?.album?.title || "",
+            duration: hit?.duration,
+        }));
+        pick = pickBestCandidate(hits, query, { requireContent: false });
+    } catch (error) {
+        plog.warn(`Deezer injoignable : ${describe(error)}`);
+        // Sans Deezer, on tente lyrics.ovh avec la requête devinée
+        if (query.artist) pick = { trackName: query.track, artistName: query.artist, albumName: "", duration: 0 };
+    }
+    if (!pick || !pick.artistName || !pick.trackName) return null;
+
+    let plain;
+    try {
+        plain = await fetchOvh(pick.artistName, pick.trackName, ctx);
+    } catch (error) {
+        plog.warn(`lyrics.ovh injoignable : ${describe(error)}`);
+        return null;
+    }
+    if (!plain) return null;
+    return {
+        ok: true,
+        songKey: null,
+        source: "lyrics.ovh",
+        synced: false,
+        lines: null,
+        plain,
+        instrumental: false,
+        match: {
+            track: String(pick.trackName),
+            artist: String(pick.artistName),
+            album: String(pick.albumName || ""),
+            duration: toDuration(pick.duration),
+        },
+    };
+}
+
+// ---------------------------------------------------------------------------------------------
+// Recherche complète
+// ---------------------------------------------------------------------------------------------
+
+function label(query) {
+    return query.artist ? `${query.artist} - ${query.track}` : query.track;
+}
+
+async function lookup(query) {
+    const ctx = newContext();
+    try {
+        const record = await lookupLrclib(query, ctx);
+        const result = record && resultFromRecord(record, query);
+        if (result) {
+            plog.log(`Paroles trouvées sur LRCLIB (${result.instrumental ? "instrumental" : result.synced ? "synchronisées" : "texte seul"}) : ${label(query)}`);
+            return result;
+        }
+    } catch {
+        // LRCLIB injoignable : déjà journalisé, on passe au repli
+    }
+
+    const legacy = await lookupLegacy(query, ctx);
+    if (legacy) {
+        plog.log(`Paroles trouvées sur lyrics.ovh : ${label(query)}`);
+        return legacy;
+    }
+
+    if (ctx.lrclibDown) return { ok: false, error: "UNAVAILABLE" };
+    // Un morceau sans paroles connues est un cas normal : simple log
+    plog.log(`Aucune parole trouvée : ${label(query)}`);
+    return { ok: false, error: "NOT_FOUND" };
+}
+
+function queryKey(query) {
+    return `${normalizeText(query.artist)}|${normalizeText(query.track)}|${query.duration || 0}`;
+}
+
+async function cachedLookup(query) {
+    return lookupCache.wrap(queryKey(query), () => lookup(query), { ttlFor: ttlForResult });
+}
+
+function withKey(result, songKey) {
+    return { ...result, songKey };
+}
+
+/**
+ * Paroles du morceau (objet Song ou équivalent sérialisé).
+ * @param {object} song
+ * @returns {Promise<object>} Result
+ */
+async function getLyricsForSong(song) {
+    if (!song || typeof song !== "object") return { ok: false, error: "NO_MUSIC" };
+    const songKey = songKeyOf(song);
+    try {
+        const query = guessQuery(song);
+        if (!query.track) return { ok: false, error: "INVALID_PARAMS", songKey };
+        return withKey(await cachedLookup(query), songKey);
+    } catch (error) {
+        plog.warn(`Recherche de paroles interrompue : ${describe(error)}`);
+        return { ok: false, error: "UNAVAILABLE", songKey };
+    }
+}
+
+function validText(value, required) {
+    if (value === undefined || value === null || value === "") return required ? null : "";
+    if (typeof value !== "string") return null;
+    const text = value.trim();
+    if (required && !text) return null;
+    return text.length > MAX_QUERY ? null : text;
+}
+
+/**
+ * Meilleures paroles pour une recherche manuelle : texte libre (« artiste titre ») ou {track, artist?, duration?}.
+ * @param {string|{track:string, artist?:string, duration?:number}} input
+ * @returns {Promise<object>} Result (songKey null)
+ */
+async function findLyrics(input) {
+    let query;
+    if (typeof input === "string") {
+        const text = validText(input, true);
+        if (text === null) return { ok: false, error: "INVALID_PARAMS", songKey: null };
+        query = guessQuery({ title: text, author: "" });
+    } else if (input && typeof input === "object" && !Array.isArray(input)) {
+        const track = validText(input.track, true);
+        const artist = validText(input.artist, false);
+        const rawDuration = input.duration;
+        const durationValid = rawDuration === undefined || rawDuration === null
+            || (typeof rawDuration === "number" && Number.isFinite(rawDuration) && rawDuration >= 0 && rawDuration < 86400);
+        if (track === null || artist === null || !durationValid) return { ok: false, error: "INVALID_PARAMS", songKey: null };
+        query = {
+            track: cleanTitle(track),
+            artist: cleanArtist(artist),
+            duration: toDuration(rawDuration),
+        };
+    } else {
+        return { ok: false, error: "INVALID_PARAMS", songKey: null };
+    }
+    if (!query.track) return { ok: false, error: "INVALID_PARAMS", songKey: null };
+    try {
+        return withKey(await cachedLookup(query), null);
+    } catch (error) {
+        plog.warn(`Recherche de paroles interrompue : ${describe(error)}`);
+        return { ok: false, error: "UNAVAILABLE", songKey: null };
+    }
+}
+
+/**
+ * Classe les enregistrements d'une recherche libre : les plus pertinents d'abord (mots de la requête,
+ * paroles synchronisées, saisies propres), les candidats jugés hors sujet ensuite, dans l'ordre de LRCLIB.
+ * @param {object[]} records
+ * @param {string} text
+ * @returns {object[]}
+ */
+function rankCandidates(records, text) {
+    const query = { track: text, artist: "", duration: 0 };
+    return records
+        .map((record, index) => ({ record, index, rated: scoreCandidate(record, query) }))
+        .sort((a, b) => {
+            if (!!a.rated !== !!b.rated) return a.rated ? -1 : 1;
+            if (a.rated && b.rated && b.rated.score !== a.rated.score) return b.rated.score - a.rated.score;
+            return a.index - b.index;
+        })
+        .map(entry => entry.record);
+}
+
+/**
+ * Candidats LRCLIB pour une recherche manuelle (≤ 20), les plus pertinents en premier.
+ * @param {string} query
+ * @returns {Promise<{ok:true, results:object[]}|{ok:false, error:string}>}
+ */
+async function searchCandidates(query) {
+    const text = validText(query, true);
+    if (text === null) return { ok: false, error: "INVALID_PARAMS" };
+    const key = normalizeText(text);
+    if (!key) return { ok: false, error: "INVALID_PARAMS" };
+    return searchCache.wrap(key, async () => {
+        try {
+            const records = await lrclibSearch({ q: text }, newContext());
+            return {
+                ok: true,
+                // Les entrées vides ou d'essai ne servent à rien dans la liste
+                results: rankCandidates(records.filter(hasContent), text).map(record => ({
+                    id: record.id,
+                    track: String(record.trackName || record.name || ""),
+                    artist: String(record.artistName || ""),
+                    album: String(record.albumName || ""),
+                    duration: toDuration(record.duration),
+                    synced: record.instrumental !== true && hasSynced(record),
+                    instrumental: record.instrumental === true,
+                })),
+            };
+        } catch {
+            return { ok: false, error: "UNAVAILABLE" };
+        }
+    }, { ttlFor: (value) => (value && value.ok ? 10 * MINUTE : 0) });
+}
+
+/**
+ * Paroles d'un enregistrement LRCLIB précis (choix manuel) : la synchronisation est toujours conservée.
+ * @param {number|string} id
+ * @returns {Promise<object>} Result (songKey null)
+ */
+async function getById(id) {
+    const value = typeof id === "string" && /^\d{1,15}$/.test(id.trim()) ? Number(id.trim()) : id;
+    if (!Number.isSafeInteger(value) || value <= 0) return { ok: false, error: "INVALID_PARAMS", songKey: null };
+    const result = await idCache.wrap(String(value), async () => {
+        try {
+            const { status, data } = await lrclibCall(`/get/${value}`, null, newContext());
+            if (status === 404 || !isRecord(data)) return { ok: false, error: "NOT_FOUND" };
+            return resultFromRecord(data, null) || { ok: false, error: "NOT_FOUND" };
+        } catch {
+            return { ok: false, error: "UNAVAILABLE" };
+        }
+    }, { ttlFor: ttlForResult });
+    return withKey(result, null);
+}
+
+/**
+ * Compatibilité : paroles en texte brut pour une recherche libre, ou null.
+ * @param {string} name
+ * @returns {Promise<string|null>}
+ */
+async function getLyrics(name) {
+    const result = await findLyrics(typeof name === "string" ? name.slice(0, MAX_QUERY) : name);
+    if (!result.ok) return null;
+    return result.plain || (result.lines ? linesToPlain(result.lines) : null);
+}
+
+// Vide les caches (tests, ou après un changement de source)
+function clearCache() {
+    lookupCache.clear();
+    idCache.clear();
+    searchCache.clear();
+}
+
+module.exports = {
+    getLyricsForSong,
+    searchCandidates,
+    getById,
+    findLyrics,
+    getLyrics,
+    parseLrc,
+    cleanTitle,
+    cleanArtist,
+    guessQuery,
+    songKeyOf,
+    pickBestCandidate,
+    scoreCandidate,
+    similarity,
+    rankCandidates,
+    ttlForResult,
+    clearCache,
+    USER_AGENT,
+};
diff --git a/src/lyrics/urls.json b/src/lyrics/urls.json
index 5a2701b..7ded010 100644
--- a/src/lyrics/urls.json
+++ b/src/lyrics/urls.json
@@ -1,4 +1,6 @@
 {
-    "urlSearch": "http://api.deezer.com/search?limit=5&q=",
-    "urlGet": "https://api.lyrics.ovh/v1/"
-}
\ No newline at end of file
+    "lrclib": "https://lrclib.net/api",
+    "urlSearch": "https://api.deezer.com/search?limit=5&q=",
+    "urlGet": "https://api.lyrics.ovh/v1/",
+    "project": "https://git.raphix.fr/subsonics"
+}
diff --git a/src/playlists/GuildPlaylists.js b/src/playlists/GuildPlaylists.js
new file mode 100644
index 0000000..7d1739d
--- /dev/null
+++ b/src/playlists/GuildPlaylists.js
@@ -0,0 +1,310 @@
+/**
+ * [Subsonics Chopin - Backend] - Playlists partagées d'un serveur Discord
+ * Base "GuildPlaylists" (data/guild_playlists.json) : { "<guildId>": [Playlist] }.
+ * Chaque playlist porte en plus scope:"guild", guildId, createdBy {id, username, global_name, avatar}
+ * et updatedBy {id, username}. Les droits (option du serveur, éditeurs) sont vérifiés par l'appelant (Server.js).
+ *
+ * Règles : aucune clé créée par une lecture, aucune suppression automatique (un serveur quitté garde ses playlists).
+ * Les opérations renvoient {ok:true, playlist} ou {ok:false, error, message}
+ * (error : NOT_FOUND, INVALID_PARAMS, LIMIT, FAILED).
+ */
+const { Database } = require('../utils/Database/Database');
+const { __glob } = require('../utils/GlobalVars');
+const { LogType } = require('loguix');
+const utils = require('./PlaylistUtils');
+const PlaylistManager = require('./PlaylistManager');
+
+const glog = new LogType("GuildPlaylists");
+
+// Au-delà, la liste partagée devient illisible et chaque sauvegarde s'alourdit
+const MAX_PLAYLISTS = 200;
+const MAX_SONGS = utils.MAX_SONGS;
+
+const guildDB = new Database("GuildPlaylists", __glob.GUILD_PLAYLISTS_DB, {});
+
+function isGuildId(guildId) {
+    return utils.isSnowflake(guildId);
+}
+
+function hasGuild(guildId) {
+    return isGuildId(guildId) && Object.prototype.hasOwnProperty.call(guildDB.data, guildId) && Array.isArray(guildDB.data[guildId]);
+}
+
+// Au démarrage : mêmes réparations que les playlists personnelles (durées, identifiants, dates, rattachement)
+try {
+    let repaired = 0;
+    for (const guildId of Object.keys(guildDB.data || {})) {
+        const list = guildDB.data[guildId];
+        if (!Array.isArray(list)) continue;
+        for (const playlist of list) {
+            if (!playlist || typeof playlist !== "object") continue;
+            let changed = utils.refreshPlaylistDuration(playlist);
+            // Dates d'abord : un identifiant attribué maintenant ne dit rien de la date de création
+            if (utils.ensureTimestamps(playlist)) changed = true;
+            if (playlist.playlistId === undefined || playlist.playlistId === null || playlist.playlistId === "") {
+                playlist.playlistId = utils.newPlaylistId(list);
+                changed = true;
+            } else if (typeof playlist.playlistId !== "string") {
+                playlist.playlistId = String(playlist.playlistId);
+                changed = true;
+            }
+            if (playlist.scope !== "guild" || playlist.guildId !== guildId) {
+                playlist.scope = "guild";
+                playlist.guildId = guildId;
+                changed = true;
+            }
+            if (changed) repaired++;
+        }
+    }
+    if (repaired > 0) {
+        glog.warn(`Playlists partagées réparées : ${repaired}`);
+        guildDB.save();
+    }
+} catch (e) {
+    glog.error("Erreur lors de la vérification des playlists partagées : " + e);
+}
+
+function ok(playlist) {
+    return { ok: true, playlist };
+}
+
+function fail(error, message) {
+    return { ok: false, error, message };
+}
+
+function notFound() {
+    return fail("NOT_FOUND", "Playlist introuvable");
+}
+
+/**
+ * Identité publique (jamais de jeton) de l'auteur d'une action
+ */
+function creatorRef(user) {
+    const identity = user?.identity || user || {};
+    return {
+        id: typeof identity.id === "string" ? identity.id : null,
+        username: identity.username ?? null,
+        global_name: identity.global_name ?? null,
+        avatar: identity.avatar ?? null
+    };
+}
+
+function editorRef(user) {
+    const identity = user?.identity || user || {};
+    return {
+        id: typeof identity.id === "string" ? identity.id : null,
+        username: identity.username ?? null
+    };
+}
+
+/**
+ * Liste modifiable d'un serveur, créée seulement pour une écriture
+ */
+function ensureGuildList(guildId) {
+    if (!isGuildId(guildId)) throw new Error("Identifiant de serveur invalide");
+    if (!hasGuild(guildId)) guildDB.data[guildId] = [];
+    return guildDB.data[guildId];
+}
+
+/**
+ * Playlists partagées d'un serveur (tableau vide détaché si aucune : jamais d'écriture)
+ * @param {string} guildId
+ * @returns {Array<Object>}
+ */
+function getPlaylists(guildId) {
+    return hasGuild(guildId) ? guildDB.data[guildId] : [];
+}
+
+function getPlaylist(guildId, playlistId) {
+    return getPlaylists(guildId).find(p => utils.sameId(p?.playlistId, playlistId)) || null;
+}
+
+function countPlaylists(guildId) {
+    return getPlaylists(guildId).length;
+}
+
+/**
+ * Serveurs possédant au moins une entrée (pour l'administration)
+ * @returns {string[]}
+ */
+function listGuildIds() {
+    return Object.keys(guildDB.data || {}).filter(id => Array.isArray(guildDB.data[id]));
+}
+
+/**
+ * Nouvelle playlist du serveur : rattachement, auteur, identifiant unique dans la liste du serveur
+ */
+function attach(list, playlist, guildId, user) {
+    playlist.playlistId = utils.newPlaylistId(list);
+    playlist.scope = "guild";
+    playlist.guildId = guildId;
+    playlist.createdBy = creatorRef(user);
+    playlist.updatedBy = editorRef(user);
+    list.push(playlist);
+    guildDB.save();
+    return playlist;
+}
+
+function markEdited(playlist, user) {
+    utils.touch(playlist);
+    playlist.updatedBy = editorRef(user);
+}
+
+function limitReached(guildId) {
+    return countPlaylists(guildId) >= MAX_PLAYLISTS;
+}
+
+function limitError() {
+    return fail("LIMIT", `Ce serveur a atteint la limite de ${MAX_PLAYLISTS} playlists partagées`);
+}
+
+/**
+ * Crée une playlist partagée vide (name) ou importée depuis un lien (url, name facultatif)
+ * @param {string} guildId
+ * @param {{name?: string|null, url?: string|null}} options
+ * @param {Object} user utilisateur (ou identité) à l'origine de la création
+ */
+async function createPlaylist(guildId, { name = null, url = null } = {}, user) {
+    if (!isGuildId(guildId)) return fail("INVALID_PARAMS", "Serveur invalide");
+    if (!url && !name) return fail("INVALID_PARAMS", "Nom de playlist requis (1 à 100 caractères)");
+    if (limitReached(guildId)) return limitError();
+    const identity = user?.identity || user || {};
+    const playlist = await PlaylistManager.buildNewPlaylist({ name, url, user: identity });
+    if (!playlist) {
+        return fail("FAILED", url ? "Import impossible : vérifiez le lien (playlist publique YouTube, Spotify ou SoundCloud)" : "La playlist n'a pas pu être créée");
+    }
+    // Revérifié après l'import (d'autres créations ont pu aboutir pendant l'attente)
+    if (limitReached(guildId)) return limitError();
+    attach(ensureGuildList(guildId), playlist, guildId, user);
+    glog.log(`Playlist partagée « ${playlist.title} » créée sur le serveur ${guildId} par ${identity.username ?? identity.id}`);
+    return ok(playlist);
+}
+
+/**
+ * Copie dans le serveur une playlist existante (par exemple une playlist personnelle)
+ */
+function importPlaylist(guildId, source, user) {
+    if (!isGuildId(guildId)) return fail("INVALID_PARAMS", "Serveur invalide");
+    if (!source || typeof source !== "object") return notFound();
+    if (limitReached(guildId)) return limitError();
+    const copy = utils.detachedCopy(source);
+    const now = utils.nowIso();
+    copy.createdAt = now;
+    copy.updatedAt = now;
+    utils.capSongs(copy);
+    utils.refreshPlaylistDuration(copy);
+    attach(ensureGuildList(guildId), copy, guildId, user);
+    glog.log(`Playlist « ${copy.title} » partagée sur le serveur ${guildId}`);
+    return ok(copy);
+}
+
+function deletePlaylist(guildId, playlistId) {
+    const list = getPlaylists(guildId);
+    const index = list.findIndex(p => utils.sameId(p?.playlistId, playlistId));
+    if (index === -1) return false;
+    const [removed] = list.splice(index, 1);
+    guildDB.save();
+    glog.log(`Playlist partagée « ${removed?.title} » (${playlistId}) supprimée du serveur ${guildId}`);
+    return true;
+}
+
+function renamePlaylist(guildId, playlistId, newName, user) {
+    const playlist = getPlaylist(guildId, playlistId);
+    if (!playlist) return notFound();
+    if (typeof newName !== "string" || newName === "") return fail("INVALID_PARAMS", "Nom invalide");
+    playlist.title = newName;
+    if (playlist.url) playlist.customTitle = true;
+    markEdited(playlist, user);
+    guildDB.save();
+    return ok(playlist);
+}
+
+function addSong(guildId, playlistId, song, user) {
+    const playlist = getPlaylist(guildId, playlistId);
+    if (!playlist) return notFound();
+    const clean = utils.prepareSong(song);
+    if (!clean) return fail("INVALID_PARAMS", "Musique invalide");
+    if (!Array.isArray(playlist.songs)) playlist.songs = [];
+    if (playlist.songs.length >= MAX_SONGS) return fail("LIMIT", `Une playlist ne peut pas dépasser ${MAX_SONGS} titres`);
+    playlist.songs.push(clean);
+    utils.refreshPlaylistDuration(playlist);
+    markEdited(playlist, user);
+    guildDB.save();
+    return ok(playlist);
+}
+
+function removeSong(guildId, playlistId, songId, index, user) {
+    const playlist = getPlaylist(guildId, playlistId);
+    if (!playlist) return notFound();
+    if (!utils.removeSongFrom(playlist, songId, index)) return fail("NOT_FOUND", "Musique introuvable dans la playlist");
+    utils.refreshPlaylistDuration(playlist);
+    markEdited(playlist, user);
+    guildDB.save();
+    return ok(playlist);
+}
+
+function moveSong(guildId, playlistId, from, to, user) {
+    const playlist = getPlaylist(guildId, playlistId);
+    if (!playlist) return notFound();
+    if (!Array.isArray(playlist.songs)) playlist.songs = [];
+    if (!utils.moveItem(playlist.songs, from, to)) return fail("INVALID_PARAMS", "Positions invalides");
+    if (from !== to) {
+        markEdited(playlist, user);
+        guildDB.save();
+    }
+    return ok(playlist);
+}
+
+/**
+ * Ordre d'affichage commun du serveur
+ * @returns {boolean} false si l'ordre est invalide
+ */
+function reorder(guildId, order) {
+    if (!Array.isArray(order)) return false;
+    if (!hasGuild(guildId)) return true;
+    if (!utils.applyOrder(guildDB.data[guildId], order)) return false;
+    guildDB.save();
+    return true;
+}
+
+/**
+ * Actualise une playlist importée depuis son lien public (même position, même identifiant, même auteur)
+ */
+async function refreshPlaylist(guildId, playlistId, user) {
+    const current = getPlaylist(guildId, playlistId);
+    if (!current) return notFound();
+    if (!current.url) return fail("INVALID_PARAMS", "Seules les playlists importées depuis un lien peuvent être actualisées");
+    const fresh = await PlaylistManager.fetchRemotePlaylist(current.url);
+    if (!fresh) return fail("FAILED", "Actualisation impossible : la playlist source est inaccessible");
+    utils.inheritIdentity(fresh, current);
+    fresh.scope = "guild";
+    fresh.guildId = guildId;
+    fresh.createdBy = current.createdBy ?? null;
+    fresh.updatedBy = editorRef(user);
+    // Supprimée pendant l'import : on ne remplace rien
+    const list = getPlaylists(guildId);
+    const index = list.findIndex(p => utils.sameId(p?.playlistId, current.playlistId));
+    if (index === -1) return notFound();
+    list.splice(index, 1, fresh);
+    guildDB.save();
+    return ok(fresh);
+}
+
+module.exports = {
+    MAX_PLAYLISTS,
+    MAX_SONGS,
+    isGuildId,
+    getPlaylists,
+    getPlaylist,
+    countPlaylists,
+    listGuildIds,
+    createPlaylist,
+    importPlaylist,
+    deletePlaylist,
+    renamePlaylist,
+    addSong,
+    removeSong,
+    moveSong,
+    reorder,
+    refreshPlaylist
+};
diff --git a/src/playlists/PlaylistManager.js b/src/playlists/PlaylistManager.js
index be4d47c..cc85d80 100644
--- a/src/playlists/PlaylistManager.js
+++ b/src/playlists/PlaylistManager.js
@@ -1,90 +1,47 @@
 const {Database} = require('../utils/Database/Database');
 const {__glob} = require('../utils/GlobalVars');
 
-const {Playlist, computeDuration} = require('./Playlist');
+const {Playlist} = require('./Playlist');
 const {LogType} = require('loguix');
 const clog = new LogType("PlaylistManager");
 const Finder = require('../player/Finder');
 const spotify = require('../media/SpotifyInformation');
 const YoutubeList = require('./Google/YoutubeList');
 const GoogleOAuth2 = require('./Google/OAuth2');
-const { getReadableDuration } = require('../utils/TimeConverter');
-const { toSafeDuration } = require('../utils/SafeMetric');
-const songCheck = require('../player/SongCheck');
+const utils = require('./PlaylistUtils');
+const {
+    sameId,
+    newPlaylistId,
+    sanitizeSongDuration,
+    refreshPlaylistDuration,
+    ensureTimestamps,
+    touch,
+    nowIso,
+    MAX_SONGS
+} = utils;
 
 // Délai minimal entre deux synchronisations YouTube réussies d'un même utilisateur (quota de l'API)
 const SYNC_COOLDOWN_MS = 60 * 1000;
+// Playlists personnelles créées / copiées par un utilisateur (chaque sauvegarde réécrit tout le fichier ;
+// la synchronisation YouTube n'est pas concernée : elle remplace des playlists existantes)
+const MAX_PLAYLISTS = 500;
 
 const playlistDB = new Database("Playlists", __glob.PLAYLISTFILE, {});
 
-/**
- * Comparaison d'identifiants de playlist tolérante (ancien String objet, nombre envoyé par un client...)
- */
-function sameId(a, b) {
-    if (a === undefined || a === null || b === undefined || b === null) return false;
-    return String(a) === String(b);
-}
-
-/**
- * Nouvel identifiant de playlist : chaîne primitive unique parmi les playlists de l'utilisateur
- * (plusieurs playlists créées dans la même milliseconde lors d'une synchronisation)
- * @param {Array} userPlaylists
- * @returns {string}
- */
-function newPlaylistId(userPlaylists) {
-    let candidate = Date.now();
-    const used = new Set((userPlaylists || []).map(p => String(p?.playlistId)));
-    while (used.has(String(candidate))) candidate++;
-    return String(candidate);
-}
-
-/**
- * Normalise la durée d'une musique (nombre de secondes, 0 si inconnue) et sa durée lisible.
- * Ne jamais faire confiance à la durée envoyée par le client ni à celle déjà enregistrée.
- * @returns {boolean} true si la musique a été modifiée
- */
-function sanitizeSongDuration(song) {
-    if (!song || typeof song !== "object") return false;
-    const duration = toSafeDuration(song.duration);
-    const readduration = getReadableDuration(duration);
-    if (song.duration === duration && song.readduration === readduration) return false;
-    song.duration = duration;
-    song.readduration = readduration;
-    return true;
-}
-
-/**
- * Recalcule la durée totale d'une playlist à partir de ses musiques (jamais NaN ni chaîne)
- * @returns {boolean} true si la playlist a été modifiée
- */
-function refreshPlaylistDuration(playlist) {
-    if (!playlist || typeof playlist !== "object") return false;
-    if (!Array.isArray(playlist.songs)) playlist.songs = [];
-    let changed = false;
-    for (const song of playlist.songs) {
-        if (sanitizeSongDuration(song)) changed = true;
-    }
-    const duration = computeDuration(playlist.songs);
-    const readduration = getReadableDuration(duration);
-    if (playlist.duration !== duration || playlist.readduration !== readduration) {
-        playlist.duration = duration;
-        playlist.readduration = readduration;
-        changed = true;
-    }
-    return changed;
-}
-
-// Au démarrage : répare les durées corrompues déjà enregistrées (null, chaîne, NaN)
-// et donne un identifiant (chaîne) aux playlists qui n'en ont pas (anciens imports YouTube)
+// Au démarrage : répare les durées corrompues déjà enregistrées (null, chaîne, NaN), donne un identifiant (chaîne)
+// aux playlists qui n'en ont pas (anciens imports YouTube) et des dates de création / modification aux anciennes
 try {
     let repaired = 0;
     let identified = 0;
+    let dated = 0;
     for (const userId of Object.keys(playlistDB.data || {})) {
         const userPlaylists = playlistDB.data[userId];
         if (!Array.isArray(userPlaylists)) continue;
         for (const playlist of userPlaylists) {
             if (refreshPlaylistDuration(playlist)) repaired++;
             if (playlist && typeof playlist === "object") {
+                // Dates d'abord : un identifiant attribué maintenant ne dit rien de la date de création
+                if (ensureTimestamps(playlist)) dated++;
                 if (playlist.playlistId === undefined || playlist.playlistId === null || playlist.playlistId === "") {
                     playlist.playlistId = newPlaylistId(userPlaylists);
                     identified++;
@@ -97,28 +54,38 @@ try {
     }
     if (repaired > 0) clog.warn(`Durées recalculées pour ${repaired} playlist(s)`);
     if (identified > 0) clog.warn(`Identifiant attribué ou corrigé pour ${identified} playlist(s)`);
-    if (repaired > 0 || identified > 0) playlistDB.save();
+    if (dated > 0) clog.log(`Dates de création / modification ajoutées à ${dated} playlist(s)`);
+    if (repaired > 0 || identified > 0 || dated > 0) playlistDB.save();
 } catch (e) {
     clog.error("Erreur lors de la vérification des playlists : " + e);
 }
 
+function hasUser(id) {
+    return typeof id === "string" && id !== "" && Object.prototype.hasOwnProperty.call(playlistDB.data, id) && Array.isArray(playlistDB.data[id]);
+}
+
+/**
+ * Liste modifiable des playlists d'un utilisateur, créée seulement pour une écriture
+ */
+function ensureUserList(id) {
+    if (typeof id !== "string" || id === "" || id === "__proto__" || id === "constructor" || id === "prototype") {
+        throw new Error("Identifiant d'utilisateur invalide pour les playlists");
+    }
+    if (!hasUser(id)) {
+        playlistDB.data[id] = [];
+        clog.log(`Création d'une clé pour l'utilisateur : ${id}`);
+    }
+    return playlistDB.data[id];
+}
 
 /**
 * @param {string} id
 * @returns {Array<Playlist>}
-* @description Renvoie la liste des playlists de l'utilisateur
+* @description Renvoie la liste des playlists de l'utilisateur (lecture seule : un utilisateur sans playlist
+* n'entraîne plus d'écriture disque ; le tableau renvoyé est alors un tableau vide détaché)
 */
 function getPlaylistsOfUser(id) {
-    if (playlistDB.data[id]) {
-        return playlistDB.data[id];
-    } else {
-        // Creaete a key with the user id and an empty array
-        playlistDB.data[id] = new Array();
-        clog.log(`Création d'une clé pour l'utilisateur : ${id}`);
-        playlistDB.save();
-        return playlistDB.data[id];
-    }
-
+    return hasUser(id) ? playlistDB.data[id] : [];
 }
 
 /**
@@ -128,7 +95,7 @@ function getPlaylistsOfUser(id) {
  */
 function getPlaylistOfUser(id, playlistId) {
     const playlists = getPlaylistsOfUser(id);
-    const playlist = playlists.find(p => sameId(p.playlistId, playlistId));
+    const playlist = playlists.find(p => sameId(p?.playlistId, playlistId));
     if (!playlist) {
         clog.warn(`La playlist ${playlistId} n'existe pas pour l'utilisateur ${id}`);
         return null;
@@ -136,47 +103,106 @@ function getPlaylistOfUser(id, playlistId) {
     return playlist;
 }
 
-async function addPlaylist(id, name, url, authorName, authorId, authorAvatar) {
-    const playlists = getPlaylistsOfUser(id);
-    var playlist = new Playlist(name, url);
-    let failed = false;
-    playlist.thumbnail = null
-    playlist.author = authorName;
-    playlist.authorAvatar = `https://cdn.discordapp.com/avatars/${authorId}/${authorAvatar}`;
-    playlist.views = null;
-
-    if(url) {
-        await Finder.search(url, false, "PLAYLIST").then(async (playlistFounded) => {
-            if(!playlistFounded) {
-                failed = true;
-            }
-            if(playlistFounded instanceof Playlist) {
-                playlist = playlistFounded;
-            }
-            if(!failed && playlist.type === "spotify") {
-                // getTracks remplace playlist.songs et renvoie la playlist elle-même
-                // (ne pas l'assigner à playlist.songs : référence circulaire impossible à sauvegarder)
-                await spotify.getTracks(playlist);
-            }
-        })
-    }
-    if(failed) {
-        clog.error(`Impossible de trouver la playlist ${name} pour l'utilisateur ${id}`);
+/**
+ * Playlist publique importée depuis un lien (YouTube, Spotify, SoundCloud), titres bornés à MAX_SONGS
+ * @param {string} url
+ * @returns {Promise<Playlist|null>}
+ */
+async function fetchRemotePlaylist(url) {
+    if (typeof url !== "string" || url === "") return null;
+    try {
+        const found = await Finder.search(url, false, "PLAYLIST");
+        if (!found || typeof found !== "object" || !Array.isArray(found.songs)) return null;
+        // Avant la conversion Spotify → YouTube : inutile de convertir des titres qui seraient retirés
+        utils.capSongs(found);
+        if (found.type === "spotify") {
+            // getTracks remplace playlist.songs et renvoie la playlist elle-même
+            // (ne pas l'assigner à playlist.songs : référence circulaire impossible à sauvegarder)
+            await spotify.getTracks(found);
+        }
+        utils.capSongs(found);
+        refreshPlaylistDuration(found);
+        return found;
+    } catch (e) {
+        clog.warn(`Import de la playlist impossible depuis le lien : ${e?.message || e}`);
         return null;
     }
+}
+
+/**
+ * Construit une nouvelle playlist (vide ou importée), sans l'enregistrer.
+ * @param {{name?: string|null, url?: string|null, user: {id: string, username?: string, global_name?: string, avatar?: string|null}}} options
+ *        name : obligatoire sans lien ; avec un lien, remplace le titre importé s'il est donné
+ * @returns {Promise<Playlist|null>}
+ */
+async function buildNewPlaylist({ name, url, user }) {
+    let playlist;
+    if (url) {
+        playlist = await fetchRemotePlaylist(url);
+        if (!playlist) return null;
+        // Un nom identique au lien (ancien client) n'est pas un vrai titre
+        if (name && name !== url) {
+            playlist.title = name;
+            playlist.customTitle = true;
+        }
+    } else {
+        if (!name) return null;
+        playlist = new Playlist(name, null);
+        playlist.thumbnail = null;
+        playlist.views = null;
+        playlist.author = user?.username || "Auteur inconnu";
+        playlist.authorId = utils.discordProfileUrl(user?.id);
+        playlist.authorAvatar = utils.discordAvatarUrl(user?.id, user?.avatar);
+    }
     refreshPlaylistDuration(playlist);
+    const now = nowIso();
+    playlist.createdAt = now;
+    playlist.updatedAt = now;
+    return playlist;
+}
+
+/**
+ * Crée une playlist personnelle (vide ou importée depuis url)
+ * @returns {Promise<Playlist|null>}
+ */
+/**
+ * Vrai si l'utilisateur peut encore créer ou recevoir une playlist
+ */
+function hasRoomForPlaylist(id) {
+    return getPlaylistsOfUser(id).length < MAX_PLAYLISTS;
+}
+
+async function addPlaylist(id, name, url, authorName, authorId, authorAvatar) {
+    // Vérifiée avant l'import (inutile d'interroger YouTube / Spotify pour rien) puis après
+    if (!hasRoomForPlaylist(id)) {
+        clog.warn(`Limite de ${MAX_PLAYLISTS} playlists atteinte pour l'utilisateur ${id}`);
+        return null;
+    }
+    const playlist = await buildNewPlaylist({
+        name,
+        url,
+        user: { id: authorId, username: authorName, avatar: authorAvatar }
+    });
+    if (!playlist) {
+        clog.error(`Impossible de créer la playlist ${name || url} pour l'utilisateur ${id}`);
+        return null;
+    }
+    if (!hasRoomForPlaylist(id)) {
+        clog.warn(`Limite de ${MAX_PLAYLISTS} playlists atteinte pour l'utilisateur ${id}`);
+        return null;
+    }
+    const playlists = ensureUserList(id);
     // Chaîne primitive : un objet String ne serait jamais égal (===) à l'identifiant envoyé par le client
     playlist.playlistId = newPlaylistId(playlists);
-
     playlists.push(playlist);
     playlistDB.save();
-    clog.log(`Ajout de la playlist ${name} pour l'utilisateur ${id}`);
+    clog.log(`Ajout de la playlist ${playlist.title} pour l'utilisateur ${id}`);
     return playlist;
 }
 
 function removePlaylist(id, playlistId) {
     const playlists = getPlaylistsOfUser(id);
-    const index = playlists.findIndex(p => sameId(p.playlistId, playlistId));
+    const index = playlists.findIndex(p => sameId(p?.playlistId, playlistId));
     if (index === -1) {
         clog.warn(`La playlist ${playlistId} n'existe pas pour l'utilisateur ${id}`);
         return false;
@@ -190,6 +216,32 @@ function getPlaylist(id, playlistId) {
     return getPlaylistOfUser(id, playlistId);
 }
 
+/**
+ * Ajoute à un utilisateur une copie indépendante d'une playlist (playlist partagée d'un serveur, autre utilisateur)
+ * @param {string} toId
+ * @param {Object} playlist
+ * @returns {Playlist|null} la copie
+ */
+function addPlaylistCopy(toId, playlist) {
+    if (!playlist || typeof playlist !== "object") return null;
+    if (!hasRoomForPlaylist(toId)) {
+        clog.warn(`Limite de ${MAX_PLAYLISTS} playlists atteinte pour l'utilisateur ${toId} : copie refusée`);
+        return null;
+    }
+    const toPlaylists = ensureUserList(toId);
+    const copy = utils.detachedCopy(playlist);
+    copy.playlistId = newPlaylistId(toPlaylists);
+    const now = nowIso();
+    copy.createdAt = now;
+    copy.updatedAt = now;
+    utils.capSongs(copy);
+    refreshPlaylistDuration(copy);
+    toPlaylists.push(copy);
+    playlistDB.save();
+    clog.log(`Copie de la playlist ${copy.title} ajoutée à l'utilisateur ${toId}`);
+    return copy;
+}
+
 /**
  * Copie une playlist vers un autre utilisateur (copie indépendante, nouvel identifiant).
  * Refusée si le destinataire possède déjà une playlist du même titre.
@@ -198,20 +250,13 @@ function getPlaylist(id, playlistId) {
 function copyPlaylist(fromId, toId, playlistId) {
     const playlist = getPlaylistOfUser(fromId, playlistId);
     if (!playlist) return null;
-    const toPlaylists = getPlaylistsOfUser(toId);
     // Doublon : même titre chez le destinataire (Playlist n'a pas de champ "name")
-    if (toPlaylists.find(p => p.title === playlist.title)) {
+    if (getPlaylistsOfUser(toId).find(p => p?.title === playlist.title)) {
         clog.warn(`La playlist ${playlist.title} existe déjà pour l'utilisateur ${toId}`);
         return null;
     }
-    // Copie profonde : un même objet partagé entre deux utilisateurs serait modifié des deux côtés
-    const copy = JSON.parse(JSON.stringify(playlist));
-    copy.playlistId = newPlaylistId(toPlaylists);
-    // Une playlist synchronisée appartient au compte Google de l'expéditeur : la copie devient une playlist classique
-    delete copy.source;
-    toPlaylists.push(copy);
-    playlistDB.save();
-    clog.log(`Copie de la playlist ${playlist.title} de l'utilisateur ${fromId} vers l'utilisateur ${toId}`);
+    const copy = addPlaylistCopy(toId, playlist);
+    if (copy) clog.log(`Copie de la playlist ${playlist.title} de l'utilisateur ${fromId} vers l'utilisateur ${toId}`);
     return copy;
 }
 
@@ -219,60 +264,85 @@ function renamePlaylist(id, playlistId, newName) {
     const playlist = getPlaylistOfUser(id, playlistId);
     if (!playlist) return null;
     playlist.title = newName;
+    // Playlist importée : le titre choisi survit aux actualisations
+    if (playlist.url) playlist.customTitle = true;
+    touch(playlist);
     playlistDB.save();
     clog.log(`Renommage de la playlist ${playlistId} en ${newName} pour l'utilisateur ${id}`);
     return playlist;
 }
 
 function addSong(id, playlistId, song) {
-    if(typeof song === "string") {
-        try {
-            song = JSON.parse(song)
-        } catch (e) {
-            clog.error(`La chanson ${song} n'est pas valide`);
-            return null;
-        }
-    }
-    // Check if the song is a valid object
-    if (typeof song !== 'object' || !song) {
-        clog.error(`La chanson ${song} n'est pas valide`);
-        return null;
-    }
     const playlist = getPlaylistOfUser(id, playlistId);
     if (!playlist) return null;
     // Données client : normalisées (textes bornés, URL autorisée, durée) avant enregistrement
-    song = songCheck.sanitizeSong(song);
-    if (!song || !song.id || !song.title) {
+    const clean = utils.prepareSong(song);
+    if (!clean) {
         clog.error(`La chanson reçue n'est pas valide`);
         return null;
     }
     if (!Array.isArray(playlist.songs)) playlist.songs = [];
-    playlist.songs.push(song);
+    if (playlist.songs.length >= MAX_SONGS) {
+        clog.warn(`La playlist ${playlistId} de l'utilisateur ${id} a atteint la limite de ${MAX_SONGS} musiques`);
+        return null;
+    }
+    playlist.songs.push(clean);
     // Recalcul complet de la durée (jamais de += sur une valeur potentiellement corrompue)
     refreshPlaylistDuration(playlist);
+    touch(playlist);
     playlistDB.save();
-    clog.log(`Ajout de la chanson ${song.title} à la playlist ${playlistId} pour l'utilisateur ${id}`);
+    clog.log(`Ajout de la chanson ${clean.title} à la playlist ${playlistId} pour l'utilisateur ${id}`);
     return playlist;
 }
 
-function removeSong(id, playlistId, songId) {
+/**
+ * @param {number} [index] position exacte de la musique (doublons) ; ignorée si elle ne correspond pas à songId
+ */
+function removeSong(id, playlistId, songId, index) {
     const playlist = getPlaylistOfUser(id, playlistId);
     if (!playlist) return null;
     if (!Array.isArray(playlist.songs)) playlist.songs = [];
-    const index = playlist.songs.findIndex(s => s.id === songId);
-    if (index === -1) {
+    if (!utils.removeSongFrom(playlist, songId, index)) {
         clog.warn(`La chanson ${songId} n'existe pas dans la playlist ${playlistId} pour l'utilisateur ${id}`);
         return null;
     }
-
-    playlist.songs.splice(index, 1);
     // Recalcul complet plutôt qu'une soustraction (durée manquante → NaN, résultat négatif...)
     refreshPlaylistDuration(playlist);
+    touch(playlist);
     playlistDB.save();
     clog.log(`Suppression de la chanson ${songId} de la playlist ${playlistId} pour l'utilisateur ${id}`);
     return playlist;
 }
 
+/**
+ * Déplace une musique dans une playlist
+ * @returns {Playlist|null} null si la playlist n'existe pas ou si les positions sont invalides
+ */
+function moveSong(id, playlistId, from, to) {
+    const playlist = getPlaylistOfUser(id, playlistId);
+    if (!playlist) return null;
+    if (!Array.isArray(playlist.songs)) playlist.songs = [];
+    if (!utils.moveItem(playlist.songs, from, to)) return null;
+    if (from !== to) {
+        touch(playlist);
+        playlistDB.save();
+    }
+    return playlist;
+}
+
+/**
+ * Ordre d'affichage choisi par l'utilisateur (ordre du tableau enregistré)
+ * @param {Array} order identifiants de playlist
+ * @returns {boolean}
+ */
+function reorderPlaylists(id, order) {
+    if (!hasUser(id)) return Array.isArray(order);
+    if (!utils.applyOrder(playlistDB.data[id], order)) return false;
+    playlistDB.save();
+    clog.log(`Nouvel ordre des playlists de l'utilisateur ${id}`);
+    return true;
+}
+
 // --- YOUTUBE (compte Google lié) ---
 
 /**
@@ -290,6 +360,8 @@ function playlistFromYoutube(data, playlistId) {
     playlist.type = "youtube";
     playlist.playlistId = playlistId;
     playlist.syncedAt = new Date().toISOString();
+    if (data.truncated) playlist.truncated = true;
+    utils.capSongs(playlist);
     refreshPlaylistDuration(playlist);
     return playlist;
 }
@@ -306,7 +378,7 @@ function findImportedIndex(userPlaylists, youtubeId) {
 
 /**
  * Importe / met à jour les playlists YouTube données (format neutre) dans la collection de l'utilisateur.
- * Les playlists déjà importées gardent leur identifiant local et leur position.
+ * Les playlists déjà importées gardent leur identifiant local, leur position et leur date de création.
  * @param {string} userId
  * @param {Array} data
  * @returns {Array<Playlist>}
@@ -316,17 +388,22 @@ function processYoutubeData(userId, data) {
         clog.warn(`Aucune donnée YouTube trouvée pour l'utilisateur ${userId}`);
         return [];
     }
-    const userPlaylists = getPlaylistsOfUser(userId);
+    const userPlaylists = ensureUserList(userId);
     const result = [];
     for (const item of data) {
         if (!item?.youtubeId) continue;
         const index = findImportedIndex(userPlaylists, item.youtubeId);
         if (index !== -1) {
-            const playlist = playlistFromYoutube(item, userPlaylists[index].playlistId || newPlaylistId(userPlaylists));
+            const current = userPlaylists[index];
+            const playlist = playlistFromYoutube(item, current.playlistId || newPlaylistId(userPlaylists));
+            utils.inheritIdentity(playlist, { ...current, playlistId: playlist.playlistId });
             userPlaylists.splice(index, 1, playlist);
             result.push(playlist);
         } else {
             const playlist = playlistFromYoutube(item, newPlaylistId(userPlaylists));
+            const now = nowIso();
+            playlist.createdAt = now;
+            playlist.updatedAt = now;
             userPlaylists.push(playlist);
             result.push(playlist);
         }
@@ -393,7 +470,7 @@ async function syncYoutube(userId, { force = false } = {}) {
 
 async function deleteUserPlaylists(userId) {
     // Delete all playlists of the user and the keys
-    if (!playlistDB.data[userId]) {
+    if (!hasUser(userId)) {
         clog.warn(`Aucune playlist trouvée pour l'utilisateur ${userId}`);
         return;
     }
@@ -408,8 +485,7 @@ async function refreshPlaylist(userId, playlistId) {
         return null;
     }
     const localId = current.playlistId;
-    var playlist = current;
-    let failed = false;
+    let playlist = null;
 
     if (current.source === "google" && current.youtubeId && GoogleOAuth2.isLinked(userId)) {
         // Playlist importée : l'API (compte du propriétaire) voit aussi les playlists privées et "J'aime"
@@ -418,39 +494,32 @@ async function refreshPlaylist(userId, playlistId) {
             playlist = playlistFromYoutube(data, localId);
         } catch (error) {
             clog.warn(`Échec de la mise à jour via l'API YouTube de la playlist ${playlistId} : ${error?.message || error}`);
-            failed = true;
         }
     } else if (current.url) {
         // Sinon : recherche publique par l'URL (les playlists privées échouent)
-        await Finder.search(current.url, false, "PLAYLIST").then(async (playlistFounded) => {
-            if(!playlistFounded) {
-                failed = true;
-            }
-            if(playlistFounded instanceof Playlist) {
-                playlist = playlistFounded;
-            }
-            if(!failed && playlist.type === "spotify") {
-                // getTracks remplace playlist.songs et renvoie la playlist elle-même
-                await spotify.getTracks(playlist);
-            }
-        })
+        playlist = await fetchRemotePlaylist(current.url);
         // Une playlist importée rafraîchie publiquement reste rattachée au compte Google
-        if (!failed && current.source === "google" && playlist !== current) {
+        if (playlist && current.source === "google") {
             playlist.source = "google";
             playlist.youtubeId = current.youtubeId;
         }
+    } else {
+        // Playlist manuelle : rien à actualiser, simple recalcul des durées
+        refreshPlaylistDuration(current);
+        playlistDB.save();
+        return current;
     }
 
-    if(failed) {
+    if (!playlist) {
         clog.warn(`Échec de la mise à jour de la playlist ${playlistId} pour l'utilisateur ${userId}`);
         return null;
     }
 
-    refreshPlaylistDuration(playlist);
+    utils.inheritIdentity(playlist, current);
     playlist.playlistId = localId;
     const playlists = getPlaylistsOfUser(userId);
     // Remplacement à la même position
-    const existingIndex = playlists.findIndex(p => sameId(p.playlistId, localId));
+    const existingIndex = playlists.findIndex(p => sameId(p?.playlistId, localId));
     if (existingIndex === -1) {
         // Supprimée entre-temps : splice(-1) aurait remplacé la dernière playlist de l'utilisateur
         clog.warn(`La playlist ${playlistId} a été supprimée pendant sa mise à jour pour l'utilisateur ${userId}`);
@@ -464,15 +533,28 @@ async function refreshPlaylist(userId, playlistId) {
 module.exports = {
     getPlaylistsOfUser,
     getPlaylistOfUser,
+    hasRoomForPlaylist,
+    MAX_PLAYLISTS,
     addPlaylist,
     removePlaylist,
     getPlaylist,
     copyPlaylist,
+    addPlaylistCopy,
     renamePlaylist,
     addSong,
     removeSong,
+    moveSong,
+    reorderPlaylists,
     processYoutubeData,
     syncYoutube,
     deleteUserPlaylists,
-    refreshPlaylist
+    refreshPlaylist,
+    // Outils partagés avec les playlists de serveur (GuildPlaylists)
+    buildNewPlaylist,
+    fetchRemotePlaylist,
+    sameId,
+    newPlaylistId,
+    sanitizeSongDuration,
+    refreshPlaylistDuration,
+    MAX_SONGS
 }
diff --git a/src/playlists/PlaylistUtils.js b/src/playlists/PlaylistUtils.js
new file mode 100644
index 0000000..ad9ab73
--- /dev/null
+++ b/src/playlists/PlaylistUtils.js
@@ -0,0 +1,341 @@
+/**
+ * [Subsonics Chopin - Backend] - Outils communs aux playlists personnelles (PlaylistManager)
+ * et aux playlists partagées des serveurs (GuildPlaylists).
+ * Fonctions pures : aucune base de données, aucun accès réseau (tests unitaires possibles sans data/).
+ */
+const { computeDuration } = require('./Playlist');
+const { getReadableDuration } = require('../utils/TimeConverter');
+const { toSafeDuration } = require('../utils/SafeMetric');
+const songCheck = require('../player/SongCheck');
+
+// Limites : une playlist énorme ralentit chaque sauvegarde (écriture synchrone de tout le fichier)
+const MAX_SONGS = 5000;
+const MAX_NAME = 100;
+const MAX_URL = 2000;
+const MAX_ID = 64;
+// Ordre envoyé par un client : au-delà, la demande est forcément anormale
+const MAX_ORDER = 10000;
+
+/**
+ * Comparaison d'identifiants de playlist tolérante (ancien String objet, nombre envoyé par un client...)
+ */
+function sameId(a, b) {
+    if (a === undefined || a === null || b === undefined || b === null) return false;
+    return String(a) === String(b);
+}
+
+/**
+ * Nouvel identifiant de playlist : chaîne primitive unique parmi les playlists de la liste
+ * (plusieurs playlists créées dans la même milliseconde lors d'une synchronisation)
+ * @param {Array} list
+ * @returns {string}
+ */
+function newPlaylistId(list) {
+    let candidate = Date.now();
+    const used = new Set((list || []).map(p => String(p?.playlistId)));
+    while (used.has(String(candidate))) candidate++;
+    return String(candidate);
+}
+
+/**
+ * Normalise la durée d'une musique (nombre de secondes, 0 si inconnue) et sa durée lisible.
+ * Ne jamais faire confiance à la durée envoyée par le client ni à celle déjà enregistrée.
+ * @returns {boolean} true si la musique a été modifiée
+ */
+function sanitizeSongDuration(song) {
+    if (!song || typeof song !== "object") return false;
+    const duration = toSafeDuration(song.duration);
+    const readduration = getReadableDuration(duration);
+    if (song.duration === duration && song.readduration === readduration) return false;
+    song.duration = duration;
+    song.readduration = readduration;
+    return true;
+}
+
+/**
+ * Recalcule la durée totale d'une playlist à partir de ses musiques (jamais NaN ni chaîne)
+ * @returns {boolean} true si la playlist a été modifiée
+ */
+function refreshPlaylistDuration(playlist) {
+    if (!playlist || typeof playlist !== "object") return false;
+    if (!Array.isArray(playlist.songs)) playlist.songs = [];
+    let changed = false;
+    for (const song of playlist.songs) {
+        if (sanitizeSongDuration(song)) changed = true;
+    }
+    const duration = computeDuration(playlist.songs);
+    const readduration = getReadableDuration(duration);
+    if (playlist.duration !== duration || playlist.readduration !== readduration) {
+        playlist.duration = duration;
+        playlist.readduration = readduration;
+        changed = true;
+    }
+    return changed;
+}
+
+function nowIso() {
+    return new Date().toISOString();
+}
+
+function isValidIso(value) {
+    return typeof value === "string" && value !== "" && !Number.isNaN(Date.parse(value));
+}
+
+/**
+ * Horodatages manquants (anciennes playlists) : la création est déduite de l'identifiant (Date.now() en chaîne),
+ * à défaut de la dernière synchronisation, sinon maintenant.
+ * @returns {boolean} true si la playlist a été modifiée
+ */
+function ensureTimestamps(playlist) {
+    if (!playlist || typeof playlist !== "object") return false;
+    let changed = false;
+    if (!isValidIso(playlist.createdAt)) {
+        const raw = String(playlist.playlistId ?? "");
+        let created = null;
+        if (/^\d{1,16}$/.test(raw)) {
+            const date = new Date(Number(raw));
+            if (!Number.isNaN(date.getTime())) created = date.toISOString();
+        }
+        if (!created && isValidIso(playlist.syncedAt)) created = new Date(playlist.syncedAt).toISOString();
+        playlist.createdAt = created || nowIso();
+        changed = true;
+    }
+    if (!isValidIso(playlist.updatedAt)) {
+        playlist.updatedAt = playlist.createdAt;
+        changed = true;
+    }
+    return changed;
+}
+
+/**
+ * Marque une playlist comme modifiée
+ */
+function touch(playlist) {
+    if (playlist && typeof playlist === "object") playlist.updatedAt = nowIso();
+    return playlist;
+}
+
+function isSnowflake(value) {
+    return typeof value === "string" && /^\d{1,25}$/.test(value);
+}
+
+/**
+ * URL de l'avatar Discord d'un utilisateur ; avatar par défaut de Discord quand il n'en a pas
+ * (avant : ".../avatars/<id>/null", image cassée)
+ * @param {string} userId
+ * @param {string|null} avatar hash Discord
+ * @returns {string}
+ */
+function discordAvatarUrl(userId, avatar) {
+    if (isSnowflake(userId) && typeof avatar === "string" && /^(a_)?[0-9a-f]{6,64}$/i.test(avatar)) {
+        const ext = avatar.startsWith("a_") ? "gif" : "png";
+        return `https://cdn.discordapp.com/avatars/${userId}/${avatar}.${ext}?size=128`;
+    }
+    // Nouveau système de pseudos : (id >> 22) % 6
+    let index = 0;
+    if (isSnowflake(userId)) {
+        try {
+            index = Number((BigInt(userId) >> 22n) % 6n);
+        } catch (e) {
+            index = 0;
+        }
+    }
+    return `https://cdn.discordapp.com/embed/avatars/${index}.png`;
+}
+
+/**
+ * Lien du profil Discord (authorId d'une playlist est un lien, comme celui des musiques)
+ */
+function discordProfileUrl(userId) {
+    return isSnowflake(userId) ? `https://discord.com/users/${userId}` : null;
+}
+
+/**
+ * Nom de playlist envoyé par un client : texte nettoyé de 1 à max caractères, sinon null
+ */
+function parseName(value, max = MAX_NAME) {
+    if (typeof value !== "string") return null;
+    const name = value.replace(/[\u0000-\u001f\u007f]/g, " ").trim();
+    if (name.length < 1 || name.length > max) return null;
+    return name;
+}
+
+/**
+ * Lien d'import envoyé par un client : texte sans espace de 1 à 2000 caractères, sinon null
+ */
+function parseUrl(value) {
+    if (typeof value !== "string") return null;
+    const url = value.trim();
+    if (url.length < 1 || url.length > MAX_URL || /\s/.test(url)) return null;
+    return url;
+}
+
+/**
+ * Identifiant de playlist envoyé par un client (chaîne ou nombre), sinon null
+ */
+function parsePlaylistId(value) {
+    if (typeof value === "number" && Number.isSafeInteger(value) && value >= 0) return String(value);
+    if (typeof value !== "string") return null;
+    const id = value.trim();
+    if (id.length < 1 || id.length > MAX_ID) return null;
+    return id;
+}
+
+/**
+ * Position envoyée par un client : entier positif ou nul (nombre ou chaîne de chiffres), sinon null
+ */
+function parseIndex(value) {
+    if (typeof value === "number") return Number.isSafeInteger(value) && value >= 0 ? value : null;
+    if (typeof value === "string" && /^\d{1,9}$/.test(value)) return Number(value);
+    return null;
+}
+
+/**
+ * Musique envoyée par un client (objet ou JSON) : normalisée par SongCheck (type, hôte autorisé, textes bornés)
+ * @returns {import('../player/Song').Song|null}
+ */
+function prepareSong(raw) {
+    if (typeof raw === "string" && raw.length > 100000) return null;
+    const song = songCheck.sanitizeSong(raw);
+    if (!song || !song.id || !song.title) return null;
+    return song;
+}
+
+function sameSongId(a, b) {
+    if (a === undefined || a === null || b === undefined || b === null) return false;
+    return String(a) === String(b);
+}
+
+/**
+ * Retire une musique : l'index exact s'il correspond bien à songId (doublons), sinon la première occurrence
+ * @returns {boolean} true si une musique a été retirée
+ */
+function removeSongFrom(playlist, songId, index) {
+    if (!playlist || !Array.isArray(playlist.songs)) return false;
+    const songs = playlist.songs;
+    let target = -1;
+    if (Number.isInteger(index) && index >= 0 && index < songs.length && sameSongId(songs[index]?.id, songId)) {
+        target = index;
+    } else {
+        target = songs.findIndex(s => sameSongId(s?.id, songId));
+    }
+    if (target === -1) return false;
+    songs.splice(target, 1);
+    return true;
+}
+
+/**
+ * Déplace un élément d'un tableau (from et to : entiers dans les bornes)
+ * @returns {boolean} false si les positions sont invalides
+ */
+function moveItem(list, from, to) {
+    if (!Array.isArray(list)) return false;
+    if (!Number.isInteger(from) || !Number.isInteger(to)) return false;
+    if (from < 0 || to < 0 || from >= list.length || to >= list.length) return false;
+    if (from === to) return true;
+    const [item] = list.splice(from, 1);
+    list.splice(to, 0, item);
+    return true;
+}
+
+/**
+ * Réordonne une liste de playlists sur place : les identifiants connus dans l'ordre donné (sans doublon),
+ * puis ceux non cités dans leur ordre relatif actuel. Identifiants inconnus ignorés.
+ * @param {Array} list
+ * @param {Array} order identifiants de playlist
+ * @returns {boolean} false si l'ordre est invalide (pas un tableau, trop long)
+ */
+function applyOrder(list, order) {
+    if (!Array.isArray(list) || !Array.isArray(order) || order.length > MAX_ORDER) return false;
+    const byId = new Map();
+    for (const playlist of list) {
+        const key = String(playlist?.playlistId);
+        if (!byId.has(key)) byId.set(key, playlist);
+    }
+    const placed = new Set();
+    const result = [];
+    for (const raw of order) {
+        const id = parsePlaylistId(raw);
+        if (id === null || placed.has(id) || !byId.has(id)) continue;
+        placed.add(id);
+        result.push(byId.get(id));
+    }
+    const kept = new Set(result);
+    for (const playlist of list) {
+        if (kept.has(playlist)) continue;
+        result.push(playlist);
+    }
+    list.splice(0, list.length, ...result);
+    return true;
+}
+
+/**
+ * Borne le nombre de musiques d'une playlist (imports géants)
+ * @returns {boolean} true si la playlist a été tronquée
+ */
+function capSongs(playlist) {
+    if (!playlist || !Array.isArray(playlist.songs) || playlist.songs.length <= MAX_SONGS) return false;
+    playlist.songs.length = MAX_SONGS;
+    playlist.truncated = true;
+    return true;
+}
+
+/**
+ * Copie indépendante d'une playlist, sans ce qui la rattache à son propriétaire ou à son serveur
+ * (une playlist synchronisée appartient au compte Google de son propriétaire : la copie devient classique)
+ */
+function detachedCopy(playlist) {
+    const copy = JSON.parse(JSON.stringify(playlist));
+    delete copy.scope;
+    delete copy.guildId;
+    delete copy.createdBy;
+    delete copy.updatedBy;
+    delete copy.source;
+    delete copy.syncedAt;
+    return copy;
+}
+
+/**
+ * Une playlist rafraîchie (nouvel objet) garde l'identité de l'ancienne : identifiant local, date de création
+ * et titre choisi par l'utilisateur
+ */
+function inheritIdentity(fresh, current) {
+    fresh.playlistId = current.playlistId;
+    fresh.createdAt = isValidIso(current.createdAt) ? current.createdAt : nowIso();
+    if (current.customTitle && typeof current.title === "string") {
+        fresh.title = current.title;
+        fresh.customTitle = true;
+    }
+    capSongs(fresh);
+    refreshPlaylistDuration(fresh);
+    touch(fresh);
+    return fresh;
+}
+
+module.exports = {
+    MAX_SONGS,
+    MAX_NAME,
+    MAX_URL,
+    sameId,
+    newPlaylistId,
+    sanitizeSongDuration,
+    refreshPlaylistDuration,
+    nowIso,
+    isValidIso,
+    ensureTimestamps,
+    touch,
+    isSnowflake,
+    discordAvatarUrl,
+    discordProfileUrl,
+    parseName,
+    parseUrl,
+    parsePlaylistId,
+    parseIndex,
+    prepareSong,
+    removeSongFrom,
+    moveItem,
+    applyOrder,
+    capSongs,
+    detachedCopy,
+    inheritIdentity
+};
diff --git a/src/server/Admin.js b/src/server/Admin.js
index cb6c17a..cfd5399 100644
--- a/src/server/Admin.js
+++ b/src/server/Admin.js
@@ -19,6 +19,7 @@ const players = require('../player/Player')
 const discordBot = require('../discord/Bot')
 const serverSettings = require('../discord/ServerSettings')
 const playlists = require('../playlists/PlaylistManager')
+const guildPlaylists = require('../playlists/GuildPlaylists')
 const warp = require('../utils/WarpProxy')
 const SafeMetric = require('../utils/SafeMetric')
 const LogReader = require('../utils/LogReader')
@@ -53,7 +54,9 @@ const SPOTIFY_TEST_TIMEOUT = 15 * 1000
 // Changement des processus yt-dlp actifs (Youtube.js ne prévient pas le player) : sondage léger
 const YTDLP_PROCESS_POLL = 2000
 // Jamais "config" : contient le token du bot et les secrets
-const DATABASES = ["Users", "Playlists", "history", "media", "previous", "server_settings"]
+const DATABASES = ["Users", "Playlists", "GuildPlaylists", "history", "media", "previous", "server_settings"]
+// Playlists partagées : qui peut les modifier (tous les membres / modérateurs)
+const SHARED_PLAYLISTS_EDITORS = ["members", "mods"]
 const PLAYER_ACTIONS = ["pause", "resume", "skip", "previous", "stop", "leave", "loop", "shuffle", "clear"]
 const LOG_LEVELS = ["INFO", "WARN", "ERROR", "FATAL"]
 const USER_FILTERS = ["all", "online", "admin", "banned", "deleted"]
@@ -447,7 +450,42 @@ function guildSummary(guildData, ctx = buildContext()) {
         missingPermissions,
         isMediaGuild: !!id && id === configuration.getMediaGuildId(),
         player: isConnectedPlayer(player) ? playerSummary(player) : null,
-        stats: guildStats(id)
+        stats: guildStats(id),
+        sharedPlaylists: sharedPlaylistsSummary(id)
+    }
+}
+
+/**
+ * Option des playlists partagées d'un serveur + nombre de playlists enregistrées (même masquées)
+ */
+function sharedPlaylistsSummary(guildId) {
+    const settings = typeof serverSettings.getSharedPlaylists === "function"
+        ? serverSettings.getSharedPlaylists(guildId)
+        : { enabled: false, editors: "members" }
+    return {
+        enabled: !!settings?.enabled,
+        editors: SHARED_PLAYLISTS_EDITORS.includes(settings?.editors) ? settings.editors : "members",
+        count: guildPlaylists.countPlaylists(guildId)
+    }
+}
+
+/**
+ * Résumé d'une playlist pour les listes d'administration (jamais la liste des titres)
+ */
+function playlistLite(p) {
+    return {
+        playlistId: p?.playlistId != null ? String(p.playlistId) : null,
+        title: p?.title ?? null,
+        type: p?.type ?? null,
+        // "google" : synchronisée depuis le compte Google du propriétaire
+        source: p?.source ?? null,
+        url: typeof p?.url === "string" ? p.url : null,
+        thumbnail: typeof p?.thumbnail === "string" ? p.thumbnail : null,
+        duration: safeNum(p?.duration),
+        syncedAt: toIso(p?.syncedAt),
+        createdAt: toIso(p?.createdAt),
+        updatedAt: toIso(p?.updatedAt),
+        songCount: Array.isArray(p?.songs) ? p.songs.length : 0
     }
 }
 
@@ -1601,6 +1639,27 @@ function attach({ io: ioInstance, socket, socketUser }) {
         return { secureRole: role ? { id: role.id, name: role.name } : null }
     })
 
+    // Playlists partagées d'un serveur : {guildId, enabled?, editors?} (désactiver masque sans rien supprimer)
+    AdminRequest("/ADMIN/GUILDS/SET_SHARED_PLAYLISTS", async (payload, me) => {
+        const data = asObject(payload)
+        const guildId = requireId(data.guildId, "guildId")
+        if (!discordBot.getGuilds().has(guildId)) throw new AdminError("NOT_FOUND", "Serveur introuvable")
+        const patch = {}
+        if (data.enabled !== undefined) patch.enabled = requireBool(data.enabled, "enabled")
+        if (data.editors !== undefined) {
+            if (!SHARED_PLAYLISTS_EDITORS.includes(data.editors)) throw new AdminError("INVALID_PARAMS", "Paramètre \"editors\" invalide (members ou mods)")
+            patch.editors = data.editors
+        }
+        if (Object.keys(patch).length === 0) throw new AdminError("INVALID_PARAMS", "Aucune modification demandée (enabled ou editors)")
+        const settings = serverSettings.setSharedPlaylists(guildId, patch)
+        if (!settings) throw new AdminError("INVALID_PARAMS", "Réglage des playlists partagées invalide")
+        audit(me, "playlists partagées", `${guildId} -> ${settings.enabled ? "activées" : "désactivées"}, modification : ${settings.editors}`)
+        process.emit("GUILDS_UPDATE")
+        // Les membres présents sur ce serveur rechargent leurs playlists partagées
+        process.emit("GUILD_PLAYLISTS_UPDATE", guildId)
+        return { sharedPlaylists: sharedPlaylistsSummary(guildId) }
+    })
+
     AdminRequest("/ADMIN/GUILDS/REFRESH", async (payload, me) => {
         if (typeof discordBot.refreshGuilds !== "function") throw new AdminError("UNAVAILABLE", "Rafraîchissement indisponible")
         await discordBot.refreshGuilds()
@@ -1763,27 +1822,63 @@ function attach({ io: ioInstance, socket, socketUser }) {
                 username: owner?.identity?.username ?? null,
                 // Identité légère pour l'affichage (jamais auth ni tokens)
                 owner: owner ? { ...userLite(owner.identity), isAdmin: owner.labels?.includes("ADMIN") ?? false, isDeleted: owner.labels?.includes("DELETED") ?? false } : null,
-                playlists: list.map(p => ({
-                    playlistId: p?.playlistId != null ? String(p.playlistId) : null,
-                    title: p?.title ?? null,
-                    type: p?.type ?? null,
-                    // "google" : synchronisée depuis le compte Google du propriétaire
-                    source: p?.source ?? null,
-                    url: typeof p?.url === "string" ? p.url : null,
-                    thumbnail: typeof p?.thumbnail === "string" ? p.thumbnail : null,
-                    duration: safeNum(p?.duration),
-                    syncedAt: toIso(p?.syncedAt),
-                    songCount: Array.isArray(p?.songs) ? p.songs.length : 0
-                }))
+                playlists: list.map(playlistLite)
             })
         }
         return result
     })
 
+    // Playlists partagées des serveurs : {guildId?}. Serveurs ayant des playlists (même désactivées ou quittés
+    // par le bot) ou l'option activée
+    AdminRequest("/ADMIN/PLAYLISTS/GUILDS", async (payload) => {
+        const data = asObject(payload)
+        const filter = data.guildId === undefined || data.guildId === null ? null : requireId(data.guildId, "guildId")
+        const botGuilds = discordBot.getGuilds()
+        const ids = new Set(guildPlaylists.listGuildIds())
+        if (typeof serverSettings.getSharedPlaylists === "function") {
+            for (const guildId of botGuilds.keys()) {
+                if (serverSettings.getSharedPlaylists(guildId)?.enabled) ids.add(guildId)
+            }
+        }
+        if (filter) {
+            ids.clear()
+            ids.add(filter)
+        }
+        const result = []
+        for (const guildId of ids) {
+            const list = guildPlaylists.getPlaylists(guildId)
+            const shared = sharedPlaylistsSummary(guildId)
+            if (!filter && list.length === 0 && !shared.enabled) continue
+            const guild = botGuilds.get(guildId)
+            result.push({
+                guildId,
+                guildName: guild?.name ?? null,
+                guildIcon: guild?.icon ?? null,
+                settings: { enabled: shared.enabled, editors: shared.editors },
+                playlists: list.map(p => ({
+                    ...playlistLite(p),
+                    createdBy: p?.createdBy ? userLite(p.createdBy) : null
+                }))
+            })
+        }
+        return result.sort((a, b) => (a.guildName || a.guildId).localeCompare(b.guildName || b.guildId))
+    })
+
+    // {userId, playlistId} : playlist personnelle ; {guildId, playlistId} : playlist partagée d'un serveur
     AdminRequest("/ADMIN/PLAYLISTS/DELETE", async (payload, me) => {
         const data = asObject(payload)
-        const userId = requireId(data.userId)
         const playlistId = requireString(typeof data.playlistId === "number" ? String(data.playlistId) : data.playlistId, "playlistId", 1, 64)
+        if (data.guildId !== undefined && data.guildId !== null) {
+            const guildId = requireId(data.guildId, "guildId")
+            const playlist = guildPlaylists.getPlaylist(guildId, playlistId)
+            if (!playlist) throw new AdminError("NOT_FOUND", "Playlist introuvable")
+            if (!guildPlaylists.deletePlaylist(guildId, playlist.playlistId)) throw new AdminError("NOT_FOUND", "Playlist introuvable")
+            audit(me, "suppression de la playlist partagée", `"${playlist.title}" (${playlistId}) du serveur ${guildId}`)
+            process.emit("GUILDS_UPDATE")
+            process.emit("GUILD_PLAYLISTS_UPDATE", guildId)
+            return { deleted: true }
+        }
+        const userId = requireId(data.userId)
         const list = dbData("Playlists", {})[userId]
         const playlist = Array.isArray(list) ? list.find(p => p?.playlistId != null && String(p.playlistId) === playlistId) : null
         if (!playlist) throw new AdminError("NOT_FOUND", "Playlist introuvable")
@@ -2016,6 +2111,17 @@ function init(ioInstance, deps = {}) {
     }, 500)
     process.on("GUILDS_UPDATE", pushGuilds)
 
+    // Playlists modifiées (personnelles ou partagées) : la section Playlists ouverte se relit d'elle-même
+    const changedScopes = new Set()
+    const pushPlaylists = debounce(() => {
+        const scopes = [...changedScopes]
+        changedScopes.clear()
+        if (roomSize(ADMIN_ROOM) === 0) return
+        io.to(ADMIN_ROOM).emit("/ADMIN/PLAYLISTS/UPDATE", { scopes })
+    }, 800)
+    process.on("PLAYLISTS_UPDATE", () => { changedScopes.add("personal"); pushPlaylists() })
+    process.on("GUILD_PLAYLISTS_UPDATE", () => { changedScopes.add("guild"); pushPlaylists() })
+
     // WARP : changement d'état du proxy
     process.on("WARP_UPDATE", () => {
         if (roomSize(ADMIN_ROOM) === 0) return
diff --git a/src/server/Server.js b/src/server/Server.js
index 9d69f63..22b34d2 100644
--- a/src/server/Server.js
+++ b/src/server/Server.js
@@ -17,6 +17,8 @@ const Finder = require("../player/Finder")
 
 const {__glob} = require("../utils/GlobalVars")
 const playlists = require("../playlists/PlaylistManager")
+const guildPlaylists = require("../playlists/GuildPlaylists")
+const playlistUtils = require("../playlists/PlaylistUtils")
 const history = require("../playlists/History")
 const lyrics = require("../lyrics/Lyrics")
 const serverSettings = require("../discord/ServerSettings")
@@ -92,6 +94,104 @@ function notifyGuildUpdate(guildId) {
     io.to(rooms).emit("/GUILD/UPDATE")
 }
 
+// Playlists partagées : messages par défaut des refus (enveloppe {ok:false, error, message})
+const GUILD_PLAYLIST_ERRORS = {
+    NO_GUILD: "Aucun serveur actif ou accès refusé à ce serveur",
+    DISABLED: "Les playlists partagées sont désactivées sur ce serveur",
+    FORBIDDEN: "Vous n'avez pas les droits nécessaires sur les playlists de ce serveur",
+    NOT_FOUND: "Playlist introuvable",
+    INVALID_PARAMS: "Paramètres invalides",
+    LIMIT: "Limite atteinte",
+    FAILED: "L'opération a échoué",
+}
+
+function refusal(error, message) {
+    return { ok: false, error, message: message || GUILD_PLAYLIST_ERRORS[error] || GUILD_PLAYLIST_ERRORS.FAILED }
+}
+
+function payloadObject(data) {
+    return data !== null && typeof data === "object" && !Array.isArray(data) ? data : {}
+}
+
+/**
+ * Identifiant de playlist : valeur brute (ancien client) ou {id} / {playlistId}
+ * @returns {string|null}
+ */
+function playlistIdFrom(data) {
+    if(typeof data === "string" || typeof data === "number") return playlistUtils.parsePlaylistId(data)
+    const payload = payloadObject(data)
+    return playlistUtils.parsePlaylistId(payload.id ?? payload.playlistId)
+}
+
+/**
+ * Création de playlist {name, url?} : nom de 1 à 100 caractères sans lien ; avec un lien (2000 caractères max),
+ * un nom non vide remplace le titre importé (un nom identique au lien, envoyé par l'ancien client, est ignoré)
+ * @returns {{name: string|null, url: string|null}|null}
+ */
+function parseCreateInput(data) {
+    const payload = payloadObject(data)
+    const hasUrl = payload.url !== undefined && payload.url !== null && payload.url !== ""
+    if(hasUrl) {
+        const url = playlistUtils.parseUrl(payload.url)
+        if(!url) return null
+        let name = null
+        if(typeof payload.name === "string" && payload.name.trim() !== "" && payload.name.trim() !== url) {
+            name = playlistUtils.parseName(payload.name)
+            if(!name) return null
+        } else if(payload.name !== undefined && payload.name !== null && typeof payload.name !== "string") {
+            return null
+        }
+        return { name, url }
+    }
+    const name = playlistUtils.parseName(payload.name)
+    return name ? { name, url: null } : null
+}
+
+/**
+ * Identifiant de musique (chaîne ou nombre non vide)
+ */
+function songIdFrom(value) {
+    if(typeof value === "number" && Number.isFinite(value)) return String(value)
+    if(typeof value === "string" && value !== "" && value.length <= 200) return value
+    return null
+}
+
+/**
+ * Statistiques publiques d'un serveur (accueil) : nombres finis, positifs, arrondis
+ */
+function guildStatsOf(guildId) {
+    const values = new Map()
+    for(const metric of SafeMetric.getGuildMetrics(guildId) || []) {
+        if(metric && typeof metric.name === "string") values.set(metric.name, metric.value)
+    }
+    const read = (name) => {
+        const n = Number(SafeMetric.toSafeNumber(values.get(name + "_" + guildId), 0))
+        return Number.isFinite(n) && n > 0 ? Math.round(n) : 0
+    }
+    return {
+        musicPlayed: read("numberOfMusicPlayed"),
+        secondsPlayed: read("numberOfSecondsPlayed"),
+        commands: read("numberOfCommands"),
+    }
+}
+
+/**
+ * Appel protégé du module de paroles : toute absence, exception ou réponse mal formée devient UNAVAILABLE
+ */
+async function callLyrics(functionName, ...args) {
+    const fn = lyrics && typeof lyrics[functionName] === "function" ? lyrics[functionName] : null
+    if(!fn) return { ok: false, error: "UNAVAILABLE" }
+    try {
+        const result = await fn(...args)
+        if(result && typeof result === "object" && typeof result.ok === "boolean") return result
+        wlog.warn("Réponse inattendue du module de paroles (" + functionName + ")")
+        return { ok: false, error: "UNAVAILABLE" }
+    } catch(e) {
+        wlog.error("Erreur du module de paroles (" + functionName + ") : " + (e?.stack || e))
+        return { ok: false, error: "UNAVAILABLE" }
+    }
+}
+
 function init() {
 
     wlog.step.init("server_init", "Initialisation du serveur Socket.IO")
@@ -177,6 +277,16 @@ function init() {
         io.to("user:" + userId).emit("/PLAYLISTS/UPDATE")
     })
 
+    // Playlists partagées d'un serveur (contenu ou réglage modifié) : sockets présents sur ce serveur
+    process.on("GUILD_PLAYLISTS_UPDATE", (guildId) => {
+        if(!io || typeof guildId !== "string" || guildId === "") return
+        try {
+            io.to(guildId).emit("/GUILD/PLAYLISTS/UPDATE", { guildId })
+        } catch(e) {
+            wlog.error("Erreur lors de l'envoi de la mise à jour des playlists partagées : " + (e?.stack || e))
+        }
+    })
+
     io.on("connection", async (socket) => {
         var socketUser;
         var disconnectHandled = false
@@ -384,23 +494,34 @@ function init() {
 
             // PLAYERS
 
-            IORequest("/PLAYER/LYRICS", async () => {
-                if(!checkUserGuild(socketUser, actualGuildId)) return IOAnswer("/PLAYER/LYRICS", false)
-                const player = await verifyPlayerAction(actualGuildId)
-                if(!player) return IOAnswer("/PLAYER/LYRICS", false)
-                if(!player.queue?.current) {
-                    wlog.warn("Le player de la guilde : " + actualGuildId + " n'a pas de musique en cours")
-                    IOAnswer("/PLAYER/LYRICS", false)
-                    return
-                }
-                const song = player.queue.current
-                const lyricsData = await lyrics.getLyrics(song.title + " " + song.author)
-                if(!lyricsData) {
-                    wlog.warn("Aucune lyrics trouvée pour la musique : " + song.title + " de l'artiste : " + song.author)
-                    IOAnswer("/PLAYER/LYRICS", false)
-                    return
-                }
-                IOAnswer("/PLAYER/LYRICS", lyricsData)
+            // PAROLES (LRCLIB, repli lyrics.ovh) : réponses {ok:true, ...} ou {ok:false, error}
+            // NO_MUSIC | NOT_FOUND | UNAVAILABLE | INVALID_PARAMS, par acquittement ou par l'événement du même nom
+
+            // Paroles de la musique en cours sur le serveur actif (jamais de création de player)
+            IORequest("/PLAYER/LYRICS", async (_, ack) => {
+                const reply = (value) => answer("/PLAYER/LYRICS", value, ack)
+                if(!checkUserGuild(socketUser, actualGuildId)) return reply({ ok: false, error: "NO_MUSIC" })
+                const song = players.AllPlayers.get(actualGuildId)?.queue?.current
+                if(!song) return reply({ ok: false, error: "NO_MUSIC" })
+                reply(await callLyrics("getLyricsForSong", song))
+            })
+
+            // Recherche manuelle : {q} ou texte (200 caractères max)
+            IORequest("/LYRICS/SEARCH", async (data, ack) => {
+                const reply = (value) => answer("/LYRICS/SEARCH", value, ack)
+                const raw = typeof data === "string" ? data : payloadObject(data).q
+                const query = typeof raw === "string" ? raw.trim() : ""
+                if(query === "" || query.length > 200) return reply({ ok: false, error: "INVALID_PARAMS" })
+                reply(await callLyrics("searchCandidates", query))
+            })
+
+            // Paroles d'un résultat de recherche : {id} (identifiant LRCLIB, entier positif)
+            IORequest("/LYRICS/GET", async (data, ack) => {
+                const reply = (value) => answer("/LYRICS/GET", value, ack)
+                const raw = typeof data === "number" || typeof data === "string" ? data : payloadObject(data).id
+                const id = typeof raw === "string" && /^\d{1,15}$/.test(raw.trim()) ? Number(raw.trim()) : raw
+                if(!Number.isSafeInteger(id) || id <= 0) return reply({ ok: false, error: "INVALID_PARAMS" })
+                reply(await callLyrics("getById", id))
             })
 
 
@@ -460,6 +581,9 @@ function init() {
                     isAdmin: socketUser.isAdmin(),
                 }
                 guildData.members = connectedMembers(actualGuildId, guild.owner)
+                // Option et droits des playlists partagées (le client adapte l'interface sans requête de plus)
+                const access = guildPlaylistsAccess()
+                guildData.sharedPlaylists = access ? sharedPlaylistsInfo(access) : { enabled: false, editors: "members", canEdit: false, canManage: false }
                 IOAnswer("/GUILD/INFO", guildData, true)
             }, true)
 
@@ -469,6 +593,12 @@ function init() {
                 IOAnswer("/GUILD/LIST", guildData, true)
             }, true)
 
+            // Statistiques publiques du serveur actif (accueil) : tout membre ayant accès
+            IORequest("/GUILD/STATS", (_, ack) => {
+                if(!checkUserGuild(socketUser, actualGuildId)) return answer("/GUILD/STATS", { ok: false, error: "NO_GUILD" }, ack, true)
+                answer("/GUILD/STATS", { ok: true, ...guildStatsOf(actualGuildId) }, ack, true)
+            }, true)
+
             // CHECKED : 03/05/2025
             IORequest("/PLAYER/STATE", async () => {
                 const player = await verifyPlayerAction(actualGuildId)
@@ -632,11 +762,33 @@ function init() {
                 IOAnswer("/SEARCH/PLAYLIST", true)
             })
 
-            IORequest("/SEARCH/LYRICS", async (name) => {
-                if(!name) return IOAnswer("/SEARCH/LYRICS", false)
-                const lyricsData = await lyrics.getLyrics(name)
-                if(!lyricsData) return IOAnswer("/SEARCH/LYRICS", false)
-                IOAnswer("/SEARCH/LYRICS", lyricsData)
+            // Ancienne route : texte libre ou {track, artist?, duration?} → paroles du meilleur résultat
+            IORequest("/SEARCH/LYRICS", async (data, ack) => {
+                const reply = (value) => answer("/SEARCH/LYRICS", value, ack)
+                const invalid = { ok: false, error: "INVALID_PARAMS" }
+                let query
+                if(typeof data === "string") {
+                    const text = data.trim()
+                    if(text === "" || text.length > 200) return reply(invalid)
+                    query = text
+                } else {
+                    const payload = payloadObject(data)
+                    const title = typeof payload.track === "string" ? payload.track.trim() : ""
+                    const author = payload.artist === undefined || payload.artist === null ? "" : payload.artist
+                    if(title === "" || title.length > 200 || typeof author !== "string" || author.length > 200) return reply(invalid)
+                    let duration = 0
+                    if(payload.duration !== undefined && payload.duration !== null) {
+                        duration = Number(payload.duration)
+                        if(!Number.isFinite(duration) || duration < 0 || duration > 86400) return reply(invalid)
+                    }
+                    query = { track: title, artist: author.trim(), duration }
+                }
+                // findLyrics : texte libre (« artiste titre ») ou {track, artist, duration}
+                if(typeof lyrics?.findLyrics === "function") return reply(await callLyrics("findLyrics", query))
+                const song = typeof query === "string"
+                    ? { title: query, author: "", duration: 0 }
+                    : { title: query.track, author: query.artist, duration: query.duration }
+                reply(await callLyrics("getLyricsForSong", song))
             })
 
             // UPLOAD
@@ -734,104 +886,291 @@ function init() {
                 IOAnswer("/CHANNEL", channel, true)
             }, true)
 
+            // PLAYLISTS PERSONNELLES
+            // Réponses inchangées (playlist | false | true) mais par acquittement si le client en fournit un
+            // (IORequestAck), sinon par l'événement du même nom. Chaque modification est poussée à toutes les
+            // sessions de l'utilisateur (/PLAYLISTS/UPDATE) pour que ses autres appareils se mettent à jour.
+
             // CHECKED : 30/04/2025
-            IORequest("/PLAYLISTS/CREATE", async (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/CREATE", false)
-                const {name, url} = data
-                if(!name || typeof name !== "string") return IOAnswer("/PLAYLISTS/CREATE", false)
-                const playlist = await playlists.addPlaylist(socketUser.identity.id, name, url, socketUser.identity.username, socketUser.identity.id, socketUser.identity.avatar)
-                if(!playlist) return IOAnswer("/PLAYLISTS/CREATE", false)
-                IOAnswer("/PLAYLISTS/CREATE", playlist)
+            IORequest("/PLAYLISTS/CREATE", async (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/CREATE", value, ack)
+                const input = parseCreateInput(data)
+                if(!input) return reply(false)
+                // Identité figée avant l'import (socketUser est relu par chaque nouvelle requête)
+                const identity = socketUser.identity
+                const playlist = await playlists.addPlaylist(identity.id, input.name, input.url, identity.username, identity.id, identity.avatar)
+                if(!playlist) return reply(false)
+                personalPlaylistsChanged(identity.id)
+                reply(playlist)
             })
 
              // CHECKED : 30/04/2025
-            IORequest("/PLAYLISTS/DELETE", (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/DELETE", false)
-                IOAnswer("/PLAYLISTS/DELETE", playlists.removePlaylist(socketUser.identity.id, data))
+            IORequest("/PLAYLISTS/DELETE", (data, ack) => {
+                const id = playlistIdFrom(data)
+                if(!id) return answer("/PLAYLISTS/DELETE", false, ack)
+                const userId = socketUser.identity.id
+                const removed = playlists.removePlaylist(userId, id)
+                if(removed) personalPlaylistsChanged(userId)
+                answer("/PLAYLISTS/DELETE", removed, ack)
             })
 
             // CHECKED : 24/04/2025
-            IORequest("/PLAYLISTS/LIST", () => {
-                const playlist = playlists.getPlaylistsOfUser(socketUser.identity.id)
-                IOAnswer("/PLAYLISTS/LIST", playlist)
+            IORequest("/PLAYLISTS/LIST", (_, ack) => {
+                answer("/PLAYLISTS/LIST", playlists.getPlaylistsOfUser(socketUser.identity.id), ack)
             })
 
             // Envoie une copie d'une playlist à un utilisateur partageant au moins un serveur
             // {playlistId (ou name, ancien nom du champ), toId}
-            IORequest("/PLAYLISTS/SEND", (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/SEND", false)
-                const toId = data.toId
-                const playlistId = data.playlistId ?? data.id ?? data.name
-                if(!playlistId || !toId || typeof toId !== "string") return IOAnswer("/PLAYLISTS/SEND", false)
+            IORequest("/PLAYLISTS/SEND", (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/SEND", value, ack)
+                const payload = payloadObject(data)
+                const toId = payload.toId
+                const playlistId = playlistUtils.parsePlaylistId(payload.playlistId ?? payload.id ?? payload.name)
+                if(!playlistId || !toId || typeof toId !== "string") return reply(false)
                 const fromId = socketUser.identity.id
-                if(toId === fromId) return IOAnswer("/PLAYLISTS/SEND", false)
+                if(toId === fromId) return reply(false)
                 const toUser = users.getUserById(toId)
-                if(!toUser || toUser.isDeleted()) return IOAnswer("/PLAYLISTS/SEND", false)
+                if(!toUser || toUser.isDeleted()) return reply(false)
                 const shareGuild = [...discordBot.getGuilds().values()].some(g => g.allMembers?.includes(fromId) && g.allMembers?.includes(toId))
-                if(!shareGuild) return IOAnswer("/PLAYLISTS/SEND", false)
+                if(!shareGuild) return reply(false)
                 // copyPlaylist refuse un doublon de titre chez le destinataire
                 const copy = playlists.copyPlaylist(fromId, toId, playlistId)
                 if(copy) process.emit("PLAYLISTS_UPDATE", toId)
-                IOAnswer("/PLAYLISTS/SEND", !!copy)
+                reply(!!copy)
             })
 
             // CHECKED : 30/04/2025
-            IORequest("/PLAYLISTS/RENAME", (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/RENAME", false)
-                const {id, newName} = data
-                if(!id || !newName || typeof newName !== "string" || newName.trim() === "" || newName.length > 200) return IOAnswer("/PLAYLISTS/RENAME", false)
-                var playlist = playlists.getPlaylist(socketUser.identity.id, id)
-                if(!playlist) return IOAnswer("/PLAYLISTS/RENAME", false)
-                playlists.renamePlaylist(socketUser.identity.id, id, newName.trim())
-                playlist = playlists.getPlaylist(socketUser.identity.id, id)
-                IOAnswer("/PLAYLISTS/RENAME", playlist)
+            IORequest("/PLAYLISTS/RENAME", (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/RENAME", value, ack)
+                const payload = payloadObject(data)
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                const newName = playlistUtils.parseName(payload.newName, 200)
+                if(!id || !newName) return reply(false)
+                const userId = socketUser.identity.id
+                const playlist = playlists.renamePlaylist(userId, id, newName)
+                if(!playlist) return reply(false)
+                personalPlaylistsChanged(userId)
+                reply(playlist)
             })
 
             // CHECKED : 30/04/2025
-            IORequest("/PLAYLISTS/ADD_SONG", (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/ADD_SONG", false)
-                const {id, song} = data
-                if(!id || !song) return IOAnswer("/PLAYLISTS/ADD_SONG", false)
-                var playlist = playlists.getPlaylistOfUser(socketUser.identity.id, id)
-                if(!playlist) return IOAnswer("/PLAYLISTS/ADD_SONG", false)
-                playlists.addSong(socketUser.identity.id, id, song)
-                playlist = playlists.getPlaylistOfUser(socketUser.identity.id, id)
-                IOAnswer("/PLAYLISTS/ADD_SONG", playlist)
+            IORequest("/PLAYLISTS/ADD_SONG", (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/ADD_SONG", value, ack)
+                const payload = payloadObject(data)
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                if(!id || !payload.song) return reply(false)
+                const userId = socketUser.identity.id
+                // null : playlist inconnue, musique invalide ou limite de titres atteinte
+                const playlist = playlists.addSong(userId, id, payload.song)
+                if(!playlist) return reply(false)
+                personalPlaylistsChanged(userId)
+                reply(playlist)
             })
 
             // CHECKED : 30/04/2025
-            IORequest("/PLAYLISTS/REMOVE_SONG", (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/REMOVE_SONG", false)
-                const {id, songId} = data
-                if(!id || !songId) return IOAnswer("/PLAYLISTS/REMOVE_SONG", false)
-                var playlist = playlists.getPlaylistOfUser(socketUser.identity.id, id)
-                if(!playlist) return IOAnswer("/PLAYLISTS/REMOVE_SONG", false)
+            // {id, songId, index?} : index désigne l'occurrence exacte quand la musique est en double
+            IORequest("/PLAYLISTS/REMOVE_SONG", (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/REMOVE_SONG", value, ack)
+                const payload = payloadObject(data)
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                const songId = songIdFrom(payload.songId)
+                if(!id || !songId) return reply(false)
+                const index = playlistUtils.parseIndex(payload.index)
+                const userId = socketUser.identity.id
+                const playlist = playlists.removeSong(userId, id, songId, index === null ? undefined : index)
+                if(!playlist) return reply(false)
+                personalPlaylistsChanged(userId)
+                reply(playlist)
+            })
 
-                playlists.removeSong(socketUser.identity.id, id, songId)
-                playlist = playlists.getPlaylistOfUser(socketUser.identity.id, id)
+            // Déplace une musique dans une playlist : {id, from, to}
+            IORequest("/PLAYLISTS/MOVE_SONG", (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/MOVE_SONG", value, ack)
+                const payload = payloadObject(data)
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                const from = playlistUtils.parseIndex(payload.from)
+                const to = playlistUtils.parseIndex(payload.to)
+                if(!id || from === null || to === null) return reply(false)
+                const userId = socketUser.identity.id
+                const playlist = playlists.moveSong(userId, id, from, to)
+                if(!playlist) return reply(false)
+                if(from !== to) personalPlaylistsChanged(userId)
+                reply(playlist)
+            })
 
-                IOAnswer("/PLAYLISTS/REMOVE_SONG", playlist)
+            // Ordre d'affichage des playlists : {order: [playlistId...]} (identifiants absents conservés à la suite)
+            IORequest("/PLAYLISTS/REORDER", (data, ack) => {
+                const order = payloadObject(data).order
+                if(!Array.isArray(order)) return answer("/PLAYLISTS/REORDER", false, ack)
+                const userId = socketUser.identity.id
+                const done = playlists.reorderPlaylists(userId, order)
+                if(done) personalPlaylistsChanged(userId)
+                answer("/PLAYLISTS/REORDER", done, ack)
             })
 
             // CHECKED : 05/05/2025
-            IORequest("/PLAYLISTS/PLAY", async (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/PLAY", false)
-                const {name, now} = data
-                if(!name) return IOAnswer("/PLAYLISTS/PLAY", false)
-                if(!checkUserGuild(socketUser, actualGuildId)) return IOAnswer("/PLAYLISTS/PLAY", false)
-                const playlist = playlists.getPlaylistOfUser(socketUser.identity.id, name)
-                if(!playlist) return IOAnswer("/PLAYLISTS/PLAY", false)
+            // {id, now} (ou {name, now} : ancien nom du champ, qui contenait déjà l'identifiant)
+            IORequest("/PLAYLISTS/PLAY", async (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/PLAY", value, ack)
+                const payload = payloadObject(data)
+                const id = playlistUtils.parsePlaylistId(payload.id ?? payload.name)
+                if(!id) return reply(false)
+                if(!checkUserGuild(socketUser, actualGuildId)) return reply(false)
+                const playlist = playlists.getPlaylistOfUser(socketUser.identity.id, id)
+                if(!playlist) return reply(false)
                 const player = new Player(actualGuildId)
-                if(!connectToPlayer(actualGuildId, player)) return IOAnswer("/PLAYLISTS/PLAY", false)
-                player.readPlaylist(playlist, now)
-                IOAnswer("/PLAYLISTS/PLAY", true)
+                if(!connectToPlayer(actualGuildId, player)) return reply(false)
+                player.readPlaylist(playlist, !!payload.now)
+                reply(true)
             })
 
-            IORequest("/PLAYLISTS/REFRESH", async (data) => {
-                if(!data) return IOAnswer("/PLAYLISTS/REFRESH", false)
-                const playlist = await playlists.refreshPlaylist(socketUser.identity.id, data)
-                if(!playlist) return IOAnswer("/PLAYLISTS/REFRESH", false)
-                IOAnswer("/PLAYLISTS/REFRESH", playlist)
+            // Identifiant brut ou {id}
+            IORequest("/PLAYLISTS/REFRESH", async (data, ack) => {
+                const reply = (value) => answer("/PLAYLISTS/REFRESH", value, ack)
+                const id = playlistIdFrom(data)
+                if(!id) return reply(false)
+                const userId = socketUser.identity.id
+                const playlist = await playlists.refreshPlaylist(userId, id)
+                if(!playlist) return reply(false)
+                personalPlaylistsChanged(userId)
+                reply(playlist)
+            })
+
+            // PLAYLISTS PARTAGÉES DU SERVEUR ACTIF
+            // Toujours le serveur actif (actualGuildId, jamais un identifiant du client) et checkUserGuild d'abord.
+            // Réponses {ok:true, ...} ou {ok:false, error, message} ; error : NO_GUILD, DISABLED, FORBIDDEN,
+            // NOT_FOUND, INVALID_PARAMS, LIMIT, FAILED. Chaque modification pousse /GUILD/PLAYLISTS/UPDATE {guildId}.
+
+            IORequest("/GUILD/PLAYLISTS/LIST", (_, ack) => {
+                const access = guildPlaylistsAccess()
+                if(!access) return answer("/GUILD/PLAYLISTS/LIST", refusal("NO_GUILD"), ack, true)
+                answer("/GUILD/PLAYLISTS/LIST", {
+                    ok: true,
+                    guildId: access.guildId,
+                    settings: { ...access.settings },
+                    canEdit: access.canEdit,
+                    canManage: access.canManage,
+                    // Désactivées : masquées (jamais supprimées), réapparaissent à la réactivation
+                    playlists: access.settings.enabled ? guildPlaylists.getPlaylists(access.guildId) : [],
+                }, ack, true)
+            }, true)
+
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/CREATE", async (payload, access) => {
+                const input = parseCreateInput(payload)
+                if(!input) return refusal("INVALID_PARAMS", "Nom (1 à 100 caractères) ou lien de playlist invalide")
+                return guildResult(await guildPlaylists.createPlaylist(access.guildId, input, access.user), access.guildId)
+            }, { edit: true })
+
+            // Suppression : créateur de la playlist, modérateur, propriétaire du serveur ou administrateur
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/DELETE", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                if(!id) return refusal("INVALID_PARAMS")
+                const playlist = guildPlaylists.getPlaylist(access.guildId, id)
+                if(!playlist) return refusal("NOT_FOUND")
+                const isCreator = !!playlist.createdBy?.id && playlist.createdBy.id === access.userId
+                if(!isCreator && !access.isModerator) return refusal("FORBIDDEN", "Seuls le créateur de la playlist et les modérateurs peuvent la supprimer")
+                if(!guildPlaylists.deletePlaylist(access.guildId, id)) return refusal("NOT_FOUND")
+                guildPlaylistsChanged(access.guildId)
+                return { ok: true }
+            })
+
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/RENAME", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                const newName = playlistUtils.parseName(payload.newName)
+                if(!id || !newName) return refusal("INVALID_PARAMS", "Nom invalide (1 à 100 caractères)")
+                return guildResult(guildPlaylists.renamePlaylist(access.guildId, id, newName, access.user), access.guildId)
+            }, { edit: true })
+
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/ADD_SONG", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                if(!id || !payload.song) return refusal("INVALID_PARAMS")
+                return guildResult(guildPlaylists.addSong(access.guildId, id, payload.song, access.user), access.guildId)
+            }, { edit: true })
+
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/REMOVE_SONG", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                const songId = songIdFrom(payload.songId)
+                if(!id || !songId) return refusal("INVALID_PARAMS")
+                const index = playlistUtils.parseIndex(payload.index)
+                return guildResult(guildPlaylists.removeSong(access.guildId, id, songId, index === null ? undefined : index, access.user), access.guildId)
+            }, { edit: true })
+
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/MOVE_SONG", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                const from = playlistUtils.parseIndex(payload.from)
+                const to = playlistUtils.parseIndex(payload.to)
+                if(!id || from === null || to === null) return refusal("INVALID_PARAMS")
+                const result = guildPlaylists.moveSong(access.guildId, id, from, to, access.user)
+                // Déplacement sur place : aucune poussée inutile
+                if(result?.ok && from === to) return { ok: true, playlist: result.playlist }
+                return guildResult(result, access.guildId)
+            }, { edit: true })
+
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/REORDER", async (payload, access) => {
+                if(!Array.isArray(payload.order)) return refusal("INVALID_PARAMS")
+                if(!guildPlaylists.reorder(access.guildId, payload.order)) return refusal("INVALID_PARAMS")
+                guildPlaylistsChanged(access.guildId)
+                return { ok: true }
+            }, { edit: true })
+
+            // Playlists importées depuis un lien uniquement
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/REFRESH", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                if(!id) return refusal("INVALID_PARAMS")
+                return guildResult(await guildPlaylists.refreshPlaylist(access.guildId, id, access.user), access.guildId)
+            }, { edit: true })
+
+            // Lecture : tout membre ayant accès (même logique de connexion que /PLAYLISTS/PLAY)
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/PLAY", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                if(!id) return refusal("INVALID_PARAMS")
+                const playlist = guildPlaylists.getPlaylist(access.guildId, id)
+                if(!playlist) return refusal("NOT_FOUND")
+                const player = new Player(access.guildId)
+                if(!connectToPlayer(access.guildId, player)) return refusal("FAILED", "Rejoignez d'abord un salon vocal de ce serveur")
+                player.readPlaylist(playlist, !!payload.now)
+                return { ok: true }
+            })
+
+            // Partage sur le serveur d'une de MES playlists (copie indépendante) : {playlistId}
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/IMPORT", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.playlistId ?? payload.id)
+                if(!id) return refusal("INVALID_PARAMS")
+                const personal = playlists.getPlaylistOfUser(access.userId, id)
+                if(!personal) return refusal("NOT_FOUND")
+                return guildResult(guildPlaylists.importPlaylist(access.guildId, personal, access.user), access.guildId)
+            }, { edit: true })
+
+            // Copie d'une playlist du serveur dans MES playlists : {id}
+            GuildPlaylistRequest("/GUILD/PLAYLISTS/COPY", async (payload, access) => {
+                const id = playlistUtils.parsePlaylistId(payload.id)
+                if(!id) return refusal("INVALID_PARAMS")
+                const playlist = guildPlaylists.getPlaylist(access.guildId, id)
+                if(!playlist) return refusal("NOT_FOUND")
+                if(!playlists.hasRoomForPlaylist(access.userId)) return refusal("LIMIT", "Vous avez atteint la limite de " + playlists.MAX_PLAYLISTS + " playlists : supprimez-en une avant d'en copier une autre")
+                const copy = playlists.addPlaylistCopy(access.userId, playlist)
+                if(!copy) return refusal("FAILED", "La copie de la playlist a échoué")
+                personalPlaylistsChanged(access.userId)
+                return { ok: true, playlist: copy }
+            })
+
+            // Réglage du serveur actif : {enabled?, editors?} (propriétaire ou administrateur du bot)
+            IORequest("/OWNER/PLAYLISTS/SETTINGS", (data, ack) => {
+                const reply = (value) => answer("/OWNER/PLAYLISTS/SETTINGS", value, ack)
+                if(!checkUserGuild(socketUser, actualGuildId)) return reply(refusal("NO_GUILD"))
+                const guild = discordBot.getGuilds().get(actualGuildId)
+                if(!isGuildOwnerOrAdmin(guild)) return reply(refusal("FORBIDDEN", "Réservé au propriétaire du serveur"))
+                const payload = payloadObject(data)
+                const patch = {}
+                if(payload.enabled !== undefined) patch.enabled = payload.enabled
+                if(payload.editors !== undefined) patch.editors = payload.editors
+                const settings = serverSettings.setSharedPlaylists(actualGuildId, patch)
+                if(!settings) return reply(refusal("INVALID_PARAMS", "Réglage invalide (enabled : booléen, editors : \"members\" ou \"mods\")"))
+                wlog.log("Playlists partagées de la guilde " + actualGuildId + " modifiées par '" + socketUser.identity.username + "'")
+                guildPlaylistsChanged(actualGuildId)
+                // Liste des serveurs de l'administration (option affichée)
+                process.emit("GUILDS_UPDATE")
+                reply({ ok: true, settings })
             })
 
 
@@ -900,6 +1239,79 @@ function init() {
                 return socketUser.isAdmin()
             }
 
+            /**
+             * Droits de l'utilisateur sur les playlists partagées du serveur actif (null : pas d'accès au serveur)
+             * - voir / lire : option activée ; modifier : activée et (tous les membres ou modérateur / propriétaire / admin)
+             * - gérer l'option : propriétaire ou administrateur du bot
+             */
+            function guildPlaylistsAccess() {
+                if(!checkUserGuild(socketUser, actualGuildId)) return null
+                const guild = discordBot.getGuilds().get(actualGuildId)
+                if(!guild) return null
+                const settings = serverSettings.getSharedPlaylists(actualGuildId)
+                const userId = socketUser.identity.id
+                const isOwner = userId === guild.owner
+                const isAdmin = socketUser.isAdmin()
+                const isModerator = isOwner || isAdmin || socketUser.isMod(actualGuildId)
+                return {
+                    guildId: actualGuildId,
+                    guild,
+                    settings,
+                    userId,
+                    // Identité figée au moment de la requête (createdBy / updatedBy)
+                    user: { ...socketUser.identity },
+                    isModerator,
+                    canEdit: settings.enabled && (settings.editors === "members" || isModerator),
+                    canManage: isOwner || isAdmin,
+                }
+            }
+
+            function sharedPlaylistsInfo(access) {
+                return {
+                    enabled: access.settings.enabled,
+                    editors: access.settings.editors,
+                    canEdit: access.canEdit,
+                    canManage: access.canManage,
+                }
+            }
+
+            /**
+             * Route des playlists partagées : accès au serveur, option activée et, si edit, droit de modification
+             * vérifiés avant le handler ; réponse unique (acquittement ou événement), exception → FAILED
+             */
+            function GuildPlaylistRequest(name, handler, { edit = false } = {}) {
+                IORequest(name, async (data, ack) => {
+                    const reply = (value) => answer(name, value, ack)
+                    try {
+                        const access = guildPlaylistsAccess()
+                        if(!access) return reply(refusal("NO_GUILD"))
+                        if(!access.settings.enabled) return reply(refusal("DISABLED"))
+                        if(edit && !access.canEdit) return reply(refusal("FORBIDDEN", "Seuls les modérateurs peuvent modifier les playlists de ce serveur"))
+                        reply(await handler(payloadObject(data), access))
+                    } catch(e) {
+                        wlog.error("Erreur lors du traitement de " + name + " pour '" + socketUser?.identity?.username + "' : " + (e?.stack || e))
+                        reply(refusal("FAILED"))
+                    }
+                })
+            }
+
+            function guildPlaylistsChanged(guildId) {
+                process.emit("GUILD_PLAYLISTS_UPDATE", guildId)
+            }
+
+            function personalPlaylistsChanged(userId) {
+                process.emit("PLAYLISTS_UPDATE", userId)
+            }
+
+            // Résultat de GuildPlaylists → enveloppe de réponse (poussée aux membres présents en cas de succès)
+            function guildResult(result, guildId) {
+                if(result?.ok) {
+                    guildPlaylistsChanged(guildId)
+                    return { ok: true, playlist: result.playlist }
+                }
+                return refusal(result?.error || "FAILED", result?.message)
+            }
+
             // CHECKED : 24/04/2025
             IORequest("/MOD/USERS/BAN", async (userId) => {
                 if(!userId || typeof userId !== "string" || !actualGuildId) return IOAnswer("/MOD/USERS/BAN", false)
diff --git a/src/utils/GlobalVars.js b/src/utils/GlobalVars.js
index e856c4f..ba2cb3b 100644
--- a/src/utils/GlobalVars.js
+++ b/src/utils/GlobalVars.js
@@ -13,6 +13,8 @@ const __glob = {
     PREVIOUSFILE: root + path.sep + "data" + path.sep + "previous.json",
     USERFILE: root + path.sep + "data" + path.sep + "users.json",
     PLAYLISTFILE: root + path.sep + "data" + path.sep + "playlists.json",
+    // Playlists partagées par serveur Discord : { "<guildId>": [Playlist] }
+    GUILD_PLAYLISTS_DB: root + path.sep + "data" + path.sep + "guild_playlists.json",
     HISTORY_DB: root + path.sep + "data" + path.sep + "history.json",
     MEDIA_DB: root + path.sep + "data" + path.sep + "media.json",
     SERVER_DB: root + path.sep + "data" + path.sep + "servers.json",
diff --git a/tests/dev/README.md b/tests/dev/README.md
index ea67479..a77ae1b 100644
--- a/tests/dev/README.md
+++ b/tests/dev/README.md
@@ -3,8 +3,8 @@
 Scripts autonomes écrits pendant la refonte YouTube / admin / OAuth (octobre 2026). Ils ne démarrent ni le bot Discord ni le serveur HTTP.
 Lancer depuis n'importe où : `node backend/tests/dev/<fichier>.js` (code de sortie 1 en cas d'échec).
 
-- Hors réseau : `cookies.test.js`, `errors.test.js`, `plan.test.js`, `limiter.test.js`, `google-utils.test.js`, `google-flow.test.js`, `admin-youtube.test.js`, `admin-config.test.js`, `server-socket.test.js`, `stream.edge.js`
-- Réseau (YouTube / GitHub réels) : `stream.e2e.js`, `check.e2e.js`, `metadata.live.test.js`, `avatar.live.test.js`, `update.check.js`
+- Hors réseau : `cookies.test.js`, `errors.test.js`, `plan.test.js`, `limiter.test.js`, `google-utils.test.js`, `google-flow.test.js`, `admin-youtube.test.js`, `admin-config.test.js`, `server-socket.test.js`, `guild-playlists.test.js` (playlists personnelles / partagées, dossier data temporaire), `stream.edge.js`, `lyrics.test.js` (fetch simulé)
+- Réseau (YouTube / GitHub / LRCLIB réels) : `stream.e2e.js`, `check.e2e.js`, `metadata.live.test.js`, `avatar.live.test.js`, `update.check.js`, `lyrics.live.js`
 - `undef-check.js` : détection d'identifiants non déclarés (nécessite `frontend/node_modules` pour @babel).
 
 Les données YouTube des tests vont dans `os.tmpdir()/chopin-tests` (jamais `backend/data/`), les logs dans `tests/dev/logs/` (ignoré par git).
diff --git a/tests/dev/admin-config.test.js b/tests/dev/admin-config.test.js
index 9a2fb9c..9848c28 100644
--- a/tests/dev/admin-config.test.js
+++ b/tests/dev/admin-config.test.js
@@ -175,7 +175,7 @@ const playlistEvents = [];
 process.on('PLAYLISTS_UPDATE', (userId) => playlistEvents.push(userId));
 
 (async () => {
-    const expected = ['/ADMIN/CONFIG/GET', '/ADMIN/CONFIG/SET', '/ADMIN/CONFIG/SPOTIFY/TEST', '/ADMIN/WARP/CONFIG', '/ADMIN/PLAYLISTS/LIST', '/ADMIN/PLAYLISTS/DELETE'];
+    const expected = ['/ADMIN/CONFIG/GET', '/ADMIN/CONFIG/SET', '/ADMIN/CONFIG/SPOTIFY/TEST', '/ADMIN/WARP/CONFIG', '/ADMIN/PLAYLISTS/LIST', '/ADMIN/PLAYLISTS/DELETE', '/ADMIN/PLAYLISTS/GUILDS', '/ADMIN/GUILDS/SET_SHARED_PLAYLISTS'];
     check('routes enregistrées', expected.every(r => handlers.has(r)), expected.filter(r => !handlers.has(r)));
 
     console.log('# Configuration : validateur pur');
@@ -316,6 +316,7 @@ process.on('PLAYLISTS_UPDATE', (userId) => playlistEvents.push(userId));
     check('compte des titres', lists[0].songCount === 2 && lists[1].songCount === 1 && lists[2].songCount === 0);
     check('synchro Google repérée', lists[1].source === 'google' && lists[1].syncedAt === '2026-10-01T10:00:00.000Z');
     check('aucune liste de titres renvoyée', lists.every(p => !('songs' in p)));
+    check('dates de création / modification exposées', lists.every(p => 'createdAt' in p && 'updatedAt' in p));
     r = await call('/ADMIN/PLAYLISTS/LIST', { userId: '444444' });
     check('filtre par utilisateur (même vide)', r.ok && r.data.length === 1 && r.data[0].playlists.length === 0);
     r = await call('/ADMIN/PLAYLISTS/LIST', { userId: 'abc' });
diff --git a/tests/dev/admin-youtube.test.js b/tests/dev/admin-youtube.test.js
index e4bbbe0..e814b80 100644
--- a/tests/dev/admin-youtube.test.js
+++ b/tests/dev/admin-youtube.test.js
@@ -25,6 +25,7 @@ const stubs = {
     [norm(SRC + '/discord/Bot')]: { getGuilds: () => guilds, getClient: () => null, isReady: () => false },
     [norm(SRC + '/discord/ServerSettings')]: {},
     [norm(SRC + '/playlists/PlaylistManager')]: {},
+    [norm(SRC + '/playlists/GuildPlaylists')]: { countPlaylists: () => 0, getPlaylists: () => [], getPlaylist: () => null, listGuildIds: () => [] },
     [norm(SRC + '/utils/SafeMetric')]: { getAll: () => [], get: () => 0 },
     [norm(SRC + '/utils/LogReader')]: { init() {}, getCurrentName: () => 'x.log', isInterrupted: async () => false },
     [norm(SRC + '/utils/Maintenance')]: {},
diff --git a/tests/dev/guild-playlists.test.js b/tests/dev/guild-playlists.test.js
new file mode 100644
index 0000000..12ede00
--- /dev/null
+++ b/tests/dev/guild-playlists.test.js
@@ -0,0 +1,336 @@
+// Playlists : horodatages / réparation au démarrage, ordre, déplacements, limites (PlaylistManager),
+// playlists partagées par serveur (GuildPlaylists), option du serveur (ServerSettings) et routes d'administration
+// associées (Admin.js). Vrais modules et vraie base JSON, mais TOUS les chemins de __glob qui pointent vers
+// backend/data sont redirigés vers un dossier temporaire. Aucun appel réseau (Finder / Spotify / Google simulés).
+const Module = require('module');
+const path = require('path');
+const fs = require('fs');
+const { BACKEND, SCRATCH, __glob, isolateData, check, done } = require('./_setup');
+
+// --- Données isolées : chaque chemin de data/ est redirigé AVANT de charger le moindre module ---
+const DATA_DIR = path.join(BACKEND, 'data');
+const realGuildFile = path.join(DATA_DIR, 'guild_playlists.json');
+const realGuildFileExisted = fs.existsSync(realGuildFile);
+const tmp = fs.mkdtempSync(path.join(SCRATCH, 'guild-playlists-'));
+for (const [key, value] of Object.entries(__glob)) {
+    if (typeof value === 'string' && path.resolve(value).toLowerCase().startsWith(DATA_DIR.toLowerCase())) {
+        __glob[key] = path.join(tmp, path.relative(DATA_DIR, value));
+    }
+}
+__glob.DATA = tmp;
+isolateData('guild-playlists-yt');
+const safePaths = Object.entries(__glob).every(([k, v]) => typeof v !== 'string' || !path.resolve(v).toLowerCase().startsWith(DATA_DIR.toLowerCase()));
+if (!safePaths || !__glob.GUILD_PLAYLISTS_DB || path.dirname(__glob.GUILD_PLAYLISTS_DB) !== tmp) {
+    console.error('Chemins non isolés : arrêt');
+    process.exit(1);
+}
+
+const USER = '111111111111111111';
+const OTHER = '444444444444444444';
+const GUILD = '222222222222222222';
+const GUILD_UNKNOWN = '999999999999999999';
+const LEGACY_ID = '1754933300538';
+
+// --- Fichiers synthétiques (anciennes entrées sans dates, identifiant numérique, durée en texte) ---
+const ytSong = (id, extra = {}) => ({ type: 'youtube', url: `https://www.youtube.com/watch?v=${id}`, id, title: 'Titre ' + id, author: 'Artiste', duration: 100, ...extra });
+fs.writeFileSync(__glob.PLAYLISTFILE, JSON.stringify({
+    [USER]: [
+        { title: 'Ancienne', playlistId: LEGACY_ID, url: null, songs: [ytSong('a', { duration: '120' })], type: 'playlist' },
+        { title: 'Numérique', playlistId: 1754933300999, url: null, songs: [], type: 'playlist' },
+        { title: 'Sans id', url: 'https://www.youtube.com/playlist?list=PLx', songs: [], type: 'youtube', syncedAt: '2026-01-02T03:04:05.000Z' }
+    ]
+}));
+fs.writeFileSync(__glob.GUILD_PLAYLISTS_DB, JSON.stringify({
+    [GUILD]: [{ title: 'Partagée ancienne', playlistId: 1700000000000, url: null, songs: [ytSong('g', { duration: '30' })], type: 'playlist' }]
+}));
+fs.writeFileSync(__glob.SERVER_DB, JSON.stringify({ [GUILD]: { secureRole: null } }));
+
+const SRC = path.join(BACKEND, 'src');
+const norm = (p) => p.replace(/\\/g, '/').toLowerCase().replace(/\.js$/, '');
+
+// --- Stubs (réseau, Discord, administration) ---
+let finderCalls = 0;
+const finderStub = {
+    search: async (url, multiple, forceType) => {
+        finderCalls++;
+        if (forceType !== 'PLAYLIST' || url.includes('echec')) return null;
+        const { Playlist } = require(path.join(SRC, 'playlists', 'Playlist.js'));
+        const songs = [ytSong('r1'), ytSong('r2', { duration: 200 })];
+        const playlist = new Playlist('Distante', url, 'Chaîne', 'https://www.youtube.com/channel/UCx', songs, 'https://i.ytimg.com/vi/r1/hq.jpg');
+        playlist.type = 'youtube';
+        return playlist;
+    }
+};
+const admin = { identity: { id: USER, username: 'testadmin', global_name: 'Admin', avatar: null }, labels: ['ADMIN'], isAdmin: () => true, isFullBanned: () => false };
+const guilds = new Map([[GUILD, { id: GUILD, name: 'Serveur Test', icon: null, owner: OTHER, allMembers: [USER, OTHER] }]]);
+const stubs = {
+    [norm(SRC + '/player/Finder')]: finderStub,
+    [norm(SRC + '/media/SpotifyInformation')]: { getTracks: async (p) => p },
+    [norm(SRC + '/playlists/Google/YoutubeList')]: {},
+    [norm(SRC + '/playlists/Google/OAuth2')]: { isLinked: () => false },
+    [norm(SRC + '/media/MediaInformation')]: {},
+    [norm(SRC + '/server/auth/User')]: { getUserById: (id) => id === USER ? admin : null, getUsers: () => [admin] },
+    [norm(SRC + '/server/auth/Session')]: { getSessionCount: () => 0 },
+    [norm(SRC + '/player/Player')]: { getAllPlayers: () => [], AllPlayers: new Map() },
+    [norm(SRC + '/discord/Bot')]: { getGuilds: () => guilds, getClient: () => ({ guilds: { cache: new Map() } }), getChannel: () => null, getGuildRoles: () => [] },
+    [norm(SRC + '/discord/MediaBase')]: {},
+    [norm(SRC + '/utils/WarpProxy')]: {},
+    [norm(SRC + '/utils/LogReader')]: { init() {} },
+    [norm(SRC + '/utils/Maintenance')]: {},
+    [norm(SRC + '/utils/Database/Configuration')]: { getMediaGuildId: () => '', getMediaChannelId: () => '' },
+    [norm(SRC + '/youtube')]: {},
+    [norm(SRC + '/player/Method/Youtube')]: { activeProcesses: new Map() },
+};
+const origLoad = Module._load;
+Module._load = function (request, parent) {
+    if (request.startsWith('.') && parent) {
+        const resolved = norm(path.resolve(path.dirname(parent.filename), request));
+        if (stubs[resolved]) return stubs[resolved];
+    }
+    return origLoad.apply(this, arguments);
+};
+
+const readJson = (file) => JSON.parse(fs.readFileSync(file, 'utf-8'));
+const sleep = (ms) => new Promise(r => setTimeout(r, ms));
+
+const PlaylistManager = require(path.join(SRC, 'playlists', 'PlaylistManager.js'));
+const GuildPlaylists = require(path.join(SRC, 'playlists', 'GuildPlaylists.js'));
+const ServerSettings = require(path.join(SRC, 'discord', 'ServerSettings.js'));
+const utils = require(path.join(SRC, 'playlists', 'PlaylistUtils.js'));
+const Admin = require(path.join(SRC, 'server', 'Admin.js'));
+
+const guildEvents = [];
+process.on('GUILD_PLAYLISTS_UPDATE', (guildId) => guildEvents.push(guildId));
+
+(async () => {
+    console.log('# PlaylistManager : réparation au démarrage');
+    let disk = readJson(__glob.PLAYLISTFILE)[USER];
+    check('date déduite de l\'identifiant', disk[0].createdAt === new Date(Number(LEGACY_ID)).toISOString() && disk[0].updatedAt === disk[0].createdAt, disk[0]);
+    check('identifiant numérique converti en chaîne + daté', disk[1].playlistId === '1754933300999' && disk[1].createdAt === new Date(1754933300999).toISOString());
+    check('identifiant attribué + date de synchro', typeof disk[2].playlistId === 'string' && disk[2].createdAt === '2026-01-02T03:04:05.000Z');
+    check('durée en texte réparée', disk[0].songs[0].duration === 120 && disk[0].duration === 120);
+
+    console.log('# PlaylistManager : lecture sans écriture');
+    const before = fs.readFileSync(__glob.PLAYLISTFILE, 'utf-8');
+    const empty = PlaylistManager.getPlaylistsOfUser(OTHER);
+    check('utilisateur inconnu : tableau vide', Array.isArray(empty) && empty.length === 0);
+    check('aucune clé créée sur lecture', fs.readFileSync(__glob.PLAYLISTFILE, 'utf-8') === before && !(OTHER in readJson(__glob.PLAYLISTFILE)));
+    check('playlist inconnue : null', PlaylistManager.getPlaylistOfUser(OTHER, '1') === null);
+
+    console.log('# PlaylistManager : création');
+    const manual = await PlaylistManager.addPlaylist(USER, 'Ma liste', null, 'testadmin', USER, null);
+    check('playlist vide créée', manual && manual.title === 'Ma liste' && manual.type === 'playlist' && Array.isArray(manual.songs));
+    check('avatar par défaut si aucun avatar', /^https:\/\/cdn\.discordapp\.com\/embed\/avatars\/[0-5]\.png$/.test(manual.authorAvatar), manual.authorAvatar);
+    check('authorId = profil Discord', manual.authorId === `https://discord.com/users/${USER}`);
+    check('createdAt = updatedAt (ISO)', utils.isValidIso(manual.createdAt) && manual.createdAt === manual.updatedAt);
+    const withAvatar = utils.discordAvatarUrl(USER, 'a_0123456789abcdef');
+    check('avatar animé en gif', withAvatar === `https://cdn.discordapp.com/avatars/${USER}/a_0123456789abcdef.gif?size=128`);
+    const imported = await PlaylistManager.addPlaylist(USER, 'Nom perso', 'https://www.youtube.com/playlist?list=PLabc', 'testadmin', USER, null);
+    check('import : nom choisi prioritaire', imported && imported.title === 'Nom perso' && imported.customTitle === true && imported.songs.length === 2 && imported.duration === 300, imported && { title: imported.title, d: imported.duration });
+    const importedPlain = await PlaylistManager.addPlaylist(USER, 'https://www.youtube.com/playlist?list=PLdef', 'https://www.youtube.com/playlist?list=PLdef', 'testadmin', USER, null);
+    check('import : nom identique au lien ignoré', importedPlain && importedPlain.title === 'Distante' && !importedPlain.customTitle);
+    check('import en échec : null', await PlaylistManager.addPlaylist(USER, null, 'https://www.youtube.com/playlist?list=echec', 'testadmin', USER, null) === null);
+    check('création sans nom ni lien : null', await PlaylistManager.addPlaylist(USER, null, null, 'testadmin', USER, null) === null);
+
+    console.log('# PlaylistManager : musiques');
+    const pid = manual.playlistId;
+    manual.updatedAt = '2020-01-01T00:00:00.000Z';
+    let res = PlaylistManager.addSong(USER, pid, ytSong('a'));
+    check('ajout + updatedAt', res && res.songs.length === 1 && res.updatedAt !== '2020-01-01T00:00:00.000Z');
+    check('ajout en JSON accepté', PlaylistManager.addSong(USER, pid, JSON.stringify(ytSong('b'))) !== null);
+    PlaylistManager.addSong(USER, pid, ytSong('a'));
+    check('musique invalide refusée', PlaylistManager.addSong(USER, pid, { type: 'evil', url: 'http://127.0.0.1/x', id: 'x', title: 'x' }) === null);
+    check('hôte non autorisé refusé', PlaylistManager.addSong(USER, pid, { type: 'youtube', url: 'https://evil.example/watch?v=x', id: 'x', title: 'x' }) === null);
+    check('playlist inconnue refusée', PlaylistManager.addSong(USER, 'nope', ytSong('c')) === null);
+    // [a, b, a] : l'index exact retire la bonne occurrence
+    res = PlaylistManager.removeSong(USER, pid, 'a', 2);
+    check('retrait par index exact', res && res.songs.map(s => s.id).join(',') === 'a,b', res?.songs?.map(s => s.id));
+    PlaylistManager.addSong(USER, pid, ytSong('c'));
+    res = PlaylistManager.removeSong(USER, pid, 'c', 0);
+    check('index incohérent : première occurrence', res && res.songs.map(s => s.id).join(',') === 'a,b');
+    check('musique absente : null', PlaylistManager.removeSong(USER, pid, 'zzz') === null);
+    PlaylistManager.addSong(USER, pid, ytSong('c'));
+    res = PlaylistManager.moveSong(USER, pid, 0, 2);
+    check('déplacement', res && res.songs.map(s => s.id).join(',') === 'b,c,a');
+    check('déplacement hors limites : null', PlaylistManager.moveSong(USER, pid, 0, 3) === null && PlaylistManager.moveSong(USER, pid, -1, 0) === null);
+    check('durée recalculée', manual.duration === 300);
+    // Limite de 5000 titres
+    const big = PlaylistManager.getPlaylistOfUser(USER, pid);
+    const saved = big.songs;
+    big.songs = Array.from({ length: utils.MAX_SONGS }, (_, i) => ({ ...saved[0], id: 'x' + i }));
+    check('limite de 5000 titres', PlaylistManager.addSong(USER, pid, ytSong('d')) === null);
+    big.songs = saved;
+
+    console.log('# PlaylistManager : ordre, renommage, actualisation, copie');
+    const ids = PlaylistManager.getPlaylistsOfUser(USER).map(p => p.playlistId);
+    check('ordre : refus si pas un tableau', PlaylistManager.reorderPlaylists(USER, 'x') === false);
+    check('ordre appliqué', PlaylistManager.reorderPlaylists(USER, [ids[3], 'inconnu', ids[0], ids[3], 42]) === true);
+    const order = PlaylistManager.getPlaylistsOfUser(USER).map(p => p.playlistId);
+    check('connus d\'abord, sans doublon, oubliés à la suite', order.join() === [ids[3], ids[0], ids[1], ids[2], ...ids.slice(4)].join(), order);
+    check('ordre enregistré', readJson(__glob.PLAYLISTFILE)[USER].map(p => p.playlistId).join() === order.join());
+    check('ordre pour un utilisateur sans playlist : aucune écriture', PlaylistManager.reorderPlaylists(OTHER, []) === true && !(OTHER in readJson(__glob.PLAYLISTFILE)));
+    const renamed = PlaylistManager.renamePlaylist(USER, importedPlain.playlistId, 'Renommée');
+    check('renommage d\'un import : titre conservé à l\'actualisation', renamed.customTitle === true);
+    const createdAt = importedPlain.createdAt;
+    renamed.updatedAt = '2020-01-01T00:00:00.000Z';
+    const refreshed = await PlaylistManager.refreshPlaylist(USER, importedPlain.playlistId);
+    check('actualisation : titre, id, création conservés', refreshed && refreshed.title === 'Renommée' && refreshed.playlistId === importedPlain.playlistId && refreshed.createdAt === createdAt && refreshed.updatedAt !== '2020-01-01T00:00:00.000Z', refreshed && { t: refreshed.title, c: refreshed.createdAt });
+    check('actualisation : même position', PlaylistManager.getPlaylistsOfUser(USER).findIndex(p => p.playlistId === importedPlain.playlistId) === order.indexOf(importedPlain.playlistId));
+    const syncedLike = { ...PlaylistManager.getPlaylistOfUser(USER, LEGACY_ID), source: 'google', scope: 'guild', guildId: GUILD, createdBy: { id: OTHER } };
+    const copy = PlaylistManager.addPlaylistCopy(OTHER, syncedLike);
+    check('copie détachée', copy && !copy.source && !copy.scope && !copy.guildId && !copy.createdBy && copy.createdAt && copy.playlistId);
+    check('copie : clé créée à l\'écriture', readJson(__glob.PLAYLISTFILE)[OTHER].length === 1);
+
+    console.log('# PlaylistManager : limite de playlists personnelles');
+    const otherList = PlaylistManager.getPlaylistsOfUser(OTHER);
+    const otherLength = otherList.length;
+    for (let i = otherLength; i < PlaylistManager.MAX_PLAYLISTS; i++) otherList.push({ playlistId: 'p' + i, title: 'x' + i, songs: [] });
+    const callsBefore = finderCalls;
+    check('limite : hasRoomForPlaylist faux', PlaylistManager.hasRoomForPlaylist(OTHER) === false && PlaylistManager.hasRoomForPlaylist(USER) === true);
+    check('limite : création refusée', await PlaylistManager.addPlaylist(OTHER, 'Trop', null, 'membre', OTHER, null) === null);
+    check('limite : import refusé sans appel réseau', await PlaylistManager.addPlaylist(OTHER, null, 'https://www.youtube.com/playlist?list=PLzz', 'membre', OTHER, null) === null && finderCalls === callsBefore);
+    check('limite : copie refusée', PlaylistManager.addPlaylistCopy(OTHER, syncedLike) === null && PlaylistManager.copyPlaylist(USER, OTHER, LEGACY_ID) === null);
+    otherList.splice(otherLength);
+    check('limite levée après suppression', PlaylistManager.hasRoomForPlaylist(OTHER) === true);
+
+    console.log('# ServerSettings : option des playlists partagées');
+    const serversBefore = fs.readFileSync(__glob.SERVER_DB, 'utf-8');
+    check('valeurs par défaut (ancienne entrée)', JSON.stringify(ServerSettings.getSharedPlaylists(GUILD)) === JSON.stringify({ enabled: false, editors: 'members' }));
+    check('serveur inconnu : défauts', ServerSettings.getSharedPlaylists(GUILD_UNKNOWN).enabled === false && ServerSettings.getSharedPlaylists(undefined).editors === 'members');
+    check('lecture sans écriture', fs.readFileSync(__glob.SERVER_DB, 'utf-8') === serversBefore);
+    check('identifiant invalide refusé', ServerSettings.setSharedPlaylists('__proto__', { enabled: true }) === null && ServerSettings.setSharedPlaylists('abc', { enabled: true }) === null);
+    check('patch vide refusé', ServerSettings.setSharedPlaylists(GUILD, {}) === null);
+    check('enabled non booléen refusé', ServerSettings.setSharedPlaylists(GUILD, { enabled: 'oui' }) === null);
+    check('editors inconnu refusé', ServerSettings.setSharedPlaylists(GUILD, { editors: 'all' }) === null);
+    check('aucune écriture sur refus', fs.readFileSync(__glob.SERVER_DB, 'utf-8') === serversBefore);
+    let settings = ServerSettings.setSharedPlaylists(GUILD, { enabled: true });
+    check('activation', settings && settings.enabled === true && settings.editors === 'members');
+    settings = ServerSettings.setSharedPlaylists(GUILD, { editors: 'mods' });
+    check('champ absent conservé', settings.enabled === true && settings.editors === 'mods');
+    let serversDisk = readJson(__glob.SERVER_DB)[GUILD];
+    check('enregistré, rôle sécurisé conservé', serversDisk.secureRole === null && serversDisk.sharedPlaylists.enabled === true && serversDisk.sharedPlaylists.editors === 'mods');
+    check('getSecureRole intact', ServerSettings.getSecureRole(GUILD) === null);
+
+    console.log('# GuildPlaylists : réparation et lecture');
+    const legacyGuild = GuildPlaylists.getPlaylists(GUILD)[0];
+    check('réparation : id chaîne, dates, rattachement', legacyGuild.playlistId === '1700000000000' && legacyGuild.createdAt === new Date(1700000000000).toISOString() && legacyGuild.scope === 'guild' && legacyGuild.guildId === GUILD);
+    check('réparation : durée', legacyGuild.duration === 30);
+    const guildBefore = fs.readFileSync(__glob.GUILD_PLAYLISTS_DB, 'utf-8');
+    check('serveur inconnu : vide sans écriture', GuildPlaylists.getPlaylists(GUILD_UNKNOWN).length === 0 && GuildPlaylists.getPlaylist(GUILD_UNKNOWN, '1') === null && GuildPlaylists.countPlaylists(GUILD_UNKNOWN) === 0);
+    check('reorder sur serveur inconnu : aucune écriture', GuildPlaylists.reorder(GUILD_UNKNOWN, []) === true);
+    check('fichier inchangé après lectures', fs.readFileSync(__glob.GUILD_PLAYLISTS_DB, 'utf-8') === guildBefore);
+
+    console.log('# GuildPlaylists : création et modifications');
+    const actor = { id: OTHER, username: 'membre', global_name: 'Membre', avatar: null, tokens: ['secret'] };
+    let g = await GuildPlaylists.createPlaylist(GUILD, { name: 'Soirée' }, actor);
+    check('création', g.ok && g.playlist.scope === 'guild' && g.playlist.guildId === GUILD && g.playlist.title === 'Soirée');
+    check('createdBy sans jeton', JSON.stringify(g.playlist.createdBy) === JSON.stringify({ id: OTHER, username: 'membre', global_name: 'Membre', avatar: null }) && g.playlist.updatedBy.id === OTHER);
+    const gid = g.playlist.playlistId;
+    check('identifiant unique dans le serveur', GuildPlaylists.getPlaylists(GUILD).filter(p => p.playlistId === gid).length === 1);
+    check('création sans nom ni lien refusée', (await GuildPlaylists.createPlaylist(GUILD, {}, actor)).error === 'INVALID_PARAMS');
+    check('serveur invalide refusé', (await GuildPlaylists.createPlaylist('abc', { name: 'x' }, actor)).error === 'INVALID_PARAMS');
+    check('import en échec : FAILED', (await GuildPlaylists.createPlaylist(GUILD, { url: 'https://www.youtube.com/playlist?list=echec' }, actor)).error === 'FAILED');
+    const gImported = await GuildPlaylists.createPlaylist(GUILD, { url: 'https://www.youtube.com/playlist?list=PLg' }, admin);
+    check('import partagé', gImported.ok && gImported.playlist.title === 'Distante' && gImported.playlist.createdBy.id === USER && gImported.playlist.songs.length === 2);
+
+    g = GuildPlaylists.addSong(GUILD, gid, ytSong('s1'), admin);
+    check('ajout + updatedBy', g.ok && g.playlist.songs.length === 1 && g.playlist.updatedBy.id === USER);
+    check('musique invalide : INVALID_PARAMS', GuildPlaylists.addSong(GUILD, gid, { type: 'x' }, admin).error === 'INVALID_PARAMS');
+    check('playlist inconnue : NOT_FOUND', GuildPlaylists.addSong(GUILD, 'nope', ytSong('s1'), admin).error === 'NOT_FOUND');
+    GuildPlaylists.addSong(GUILD, gid, ytSong('s2'), admin);
+    GuildPlaylists.addSong(GUILD, gid, ytSong('s1'), admin);
+    g = GuildPlaylists.removeSong(GUILD, gid, 's1', 2, actor);
+    check('retrait par index exact', g.ok && g.playlist.songs.map(s => s.id).join() === 's1,s2' && g.playlist.updatedBy.id === OTHER);
+    check('retrait absent : NOT_FOUND', GuildPlaylists.removeSong(GUILD, gid, 'zz', undefined, actor).error === 'NOT_FOUND');
+    g = GuildPlaylists.moveSong(GUILD, gid, 1, 0, actor);
+    check('déplacement', g.ok && g.playlist.songs.map(s => s.id).join() === 's2,s1');
+    check('déplacement invalide', GuildPlaylists.moveSong(GUILD, gid, 0, 9, actor).error === 'INVALID_PARAMS');
+    g = GuildPlaylists.renamePlaylist(GUILD, gid, 'Soirée 2', actor);
+    check('renommage', g.ok && g.playlist.title === 'Soirée 2');
+    const list = GuildPlaylists.getPlaylists(GUILD).map(p => p.playlistId);
+    check('ordre commun', GuildPlaylists.reorder(GUILD, [list[2], list[0]]) && GuildPlaylists.getPlaylists(GUILD).map(p => p.playlistId).join() === [list[2], list[0], list[1]].join());
+    check('ordre invalide', GuildPlaylists.reorder(GUILD, 'x') === false);
+
+    check('actualisation d\'une playlist manuelle refusée', (await GuildPlaylists.refreshPlaylist(GUILD, gid, actor)).error === 'INVALID_PARAMS');
+    const importedCreated = gImported.playlist.createdAt;
+    g = await GuildPlaylists.refreshPlaylist(GUILD, gImported.playlist.playlistId, actor);
+    check('actualisation : auteur et création conservés', g.ok && g.playlist.createdBy.id === USER && g.playlist.updatedBy.id === OTHER && g.playlist.createdAt === importedCreated && g.playlist.scope === 'guild' && g.playlist.guildId === GUILD);
+
+    const personalSynced = { ...PlaylistManager.getPlaylistOfUser(USER, LEGACY_ID), source: 'google', syncedAt: '2026-01-01T00:00:00.000Z' };
+    g = GuildPlaylists.importPlaylist(GUILD, personalSynced, admin);
+    check('partage d\'une playlist personnelle', g.ok && !g.playlist.source && !g.playlist.syncedAt && g.playlist.scope === 'guild' && g.playlist.title === 'Ancienne' && g.playlist.playlistId);
+    const sharedId = g.playlist.playlistId;
+    check('copie indépendante', g.playlist.songs !== personalSynced.songs);
+
+    // Limite de 200 playlists par serveur
+    const live = GuildPlaylists.getPlaylists(GUILD);
+    const realLength = live.length;
+    for (let i = realLength; i < GuildPlaylists.MAX_PLAYLISTS; i++) live.push({ playlistId: 'fill' + i, title: 'x', songs: [] });
+    check('limite de 200 : création', (await GuildPlaylists.createPlaylist(GUILD, { name: 'Trop' }, actor)).error === 'LIMIT');
+    check('limite de 200 : partage', GuildPlaylists.importPlaylist(GUILD, personalSynced, actor).error === 'LIMIT');
+    live.splice(realLength);
+
+    const diskGuild = readJson(__glob.GUILD_PLAYLISTS_DB)[GUILD];
+    check('enregistré sur disque', diskGuild.length === realLength && diskGuild.every(p => p.scope === 'guild' && p.createdAt && p.updatedAt));
+
+    console.log('# Désactivation : données conservées');
+    ServerSettings.setSharedPlaylists(GUILD, { enabled: false });
+    check('désactivé : playlists conservées', GuildPlaylists.countPlaylists(GUILD) === realLength && readJson(__glob.GUILD_PLAYLISTS_DB)[GUILD].length === realLength);
+    ServerSettings.setSharedPlaylists(GUILD, { enabled: true });
+
+    console.log('# Administration');
+    const handlers = new Map();
+    const socket = { id: 'sock1', data: { userId: USER }, rooms: new Set(), on: (name, fn) => handlers.set(name, fn), emit() {}, leave() {}, join() {} };
+    const fakeIo = {
+        sockets: { adapter: { rooms: new Map() }, sockets: new Map() },
+        to: () => ({ emit() {} }), in: () => ({ socketsLeave() {} }), emit() {}, of: () => ({ adapter: { on() {} } })
+    };
+    Admin.attach({ io: fakeIo, socket, socketUser: () => admin });
+    const call = (name, payload) => new Promise((resolve) => handlers.get(name)(payload, resolve));
+
+    let r = await call('/ADMIN/DATABASES', {});
+    check('base GuildPlaylists listée', r.ok && r.data.some(db => db.name === 'GuildPlaylists' && db.entries === 1), r.data?.map(db => db.name));
+    r = await call('/ADMIN/PLAYLISTS/LIST', { userId: USER });
+    check('LIST : createdAt / updatedAt', r.ok && r.data[0].playlists.every(p => utils.isValidIso(p.createdAt) && utils.isValidIso(p.updatedAt)));
+    r = await call('/ADMIN/PLAYLISTS/GUILDS', {});
+    const entry = r.data?.find(e => e.guildId === GUILD);
+    check('GUILDS : serveur et réglage', r.ok && entry && entry.guildName === 'Serveur Test' && entry.settings.enabled === true && entry.settings.editors === 'mods', r);
+    check('GUILDS : playlists résumées', entry && entry.playlists.length === realLength && entry.playlists.every(p => typeof p.songCount === 'number' && !('songs' in p) && p.createdAt));
+    check('GUILDS : createdBy léger', entry && entry.playlists.find(p => p.playlistId === gid)?.createdBy?.id === OTHER && !JSON.stringify(entry).includes('secret'));
+    r = await call('/ADMIN/PLAYLISTS/GUILDS', { guildId: 'abc' });
+    check('GUILDS : guildId invalide', !r.ok && r.error === 'INVALID_PARAMS');
+    r = await call('/ADMIN/PLAYLISTS/GUILDS', { guildId: GUILD_UNKNOWN });
+    check('GUILDS : filtre sur serveur sans playlist', r.ok && r.data.length === 1 && r.data[0].playlists.length === 0 && !GuildPlaylists.listGuildIds().includes(GUILD_UNKNOWN));
+
+    guildEvents.length = 0;
+    r = await call('/ADMIN/GUILDS/SET_SHARED_PLAYLISTS', { guildId: GUILD, editors: 'members' });
+    check('SET_SHARED_PLAYLISTS', r.ok && r.data.sharedPlaylists.enabled === true && r.data.sharedPlaylists.editors === 'members' && r.data.sharedPlaylists.count === realLength, r);
+    check('poussée vers le serveur', guildEvents.includes(GUILD));
+    r = await call('/ADMIN/GUILDS/SET_SHARED_PLAYLISTS', { guildId: GUILD, editors: 'tous' });
+    check('editors invalide', !r.ok && r.error === 'INVALID_PARAMS');
+    r = await call('/ADMIN/GUILDS/SET_SHARED_PLAYLISTS', { guildId: GUILD, enabled: 'oui' });
+    check('enabled invalide', !r.ok && r.error === 'INVALID_PARAMS');
+    r = await call('/ADMIN/GUILDS/SET_SHARED_PLAYLISTS', { guildId: GUILD });
+    check('aucune modification', !r.ok && r.error === 'INVALID_PARAMS');
+    r = await call('/ADMIN/GUILDS/SET_SHARED_PLAYLISTS', { guildId: GUILD_UNKNOWN, enabled: true });
+    check('serveur inconnu', !r.ok && r.error === 'NOT_FOUND');
+    r = await call('/ADMIN/GUILDS/LIST', {});
+    check('résumé du serveur : sharedPlaylists', r.ok && JSON.stringify(r.data[0].sharedPlaylists) === JSON.stringify({ enabled: true, editors: 'members', count: realLength }), r.data?.[0]?.sharedPlaylists);
+
+    guildEvents.length = 0;
+    r = await call('/ADMIN/PLAYLISTS/DELETE', { guildId: GUILD, playlistId: 'inconnue' });
+    check('DELETE partagée inconnue', !r.ok && r.error === 'NOT_FOUND');
+    r = await call('/ADMIN/PLAYLISTS/DELETE', { guildId: GUILD, playlistId: sharedId });
+    check('DELETE partagée', r.ok && r.data.deleted === true && !GuildPlaylists.getPlaylist(GUILD, sharedId) && guildEvents.includes(GUILD));
+    r = await call('/ADMIN/PLAYLISTS/DELETE', { userId: USER, playlistId: pid });
+    check('DELETE personnelle toujours possible', r.ok && !PlaylistManager.getPlaylistOfUser(USER, pid));
+
+    check('suppression d\'une playlist partagée (module)', GuildPlaylists.deletePlaylist(GUILD, gid) === true && GuildPlaylists.deletePlaylist(GUILD, gid) === false);
+
+    await sleep(50);
+    check('backend/data jamais utilisé', fs.existsSync(realGuildFile) === realGuildFileExisted && !fs.existsSync(realGuildFile + '.tmp'));
+
+    fs.rmSync(tmp, { recursive: true, force: true });
+    done();
+    setTimeout(() => process.exit(process.exitCode || 0), 50);
+})().catch((e) => { console.error(e); process.exit(1); });
diff --git a/tests/dev/lyrics.live.js b/tests/dev/lyrics.live.js
new file mode 100644
index 0000000..7afab28
--- /dev/null
+++ b/tests/dev/lyrics.live.js
@@ -0,0 +1,90 @@
+// Test réseau de backend/src/lyrics/Lyrics.js contre LRCLIB réel (node lyrics.live.js) : affiche les résultats
+const { check, done, req } = require("./_setup");
+const L = req("src/lyrics/Lyrics.js");
+
+// Formes rencontrées en vrai : titres YouTube bruts, chaînes VEVO / Topic, morceaux Spotify propres
+const SONGS = [
+    { type: "youtube", id: "FGBhQbmPwH8", title: "Daft Punk - One More Time (Official Video)", author: "Daft Punk", duration: 320, expectSynced: true },
+    { type: "youtube", id: "dQw4w9WgXcQ", title: "Rick Astley - Never Gonna Give You Up (Official Music Video)", author: "Rick Astley", duration: 213, expectSynced: true },
+    { type: "youtube", id: "spotify-papaoutai", title: "Papaoutai", author: "Stromae", duration: 232, expectSynced: true },
+    { type: "youtube", id: "fJ9rUzIMcZQ", title: "Queen – Bohemian Rhapsody (Official Video Remastered)", author: "Queen Official", duration: 360 },
+    { type: "youtube", id: "topic-test", title: "Get Lucky (feat. Pharrell Williams and Nile Rodgers)", author: "Daft Punk - Topic", duration: 369 },
+    { type: "youtube", id: "nope", title: "zzqx introuvable 8472 kq", author: "Personne", duration: 100, expectMiss: true },
+];
+
+function preview(result) {
+    if (!result.ok) return `échec ${result.error}`;
+    const first = result.synced ? result.lines.find(l => l.text) : null;
+    return `${result.source} · ${result.instrumental ? "instrumental" : result.synced ? `synchronisées (${result.lines.length} lignes, 1re à ${(first.t / 1000).toFixed(2)} s : « ${first.text} »)` : "texte seul"}`
+        + ` · match ${result.match.artist} - ${result.match.track} (${result.match.album || "?"}, ${result.match.duration} s, id ${result.match.id ?? "-"})`;
+}
+
+(async () => {
+    for (const song of SONGS) {
+        const t = Date.now();
+        const result = await L.getLyricsForSong(song);
+        console.log(`\n${song.title} / ${song.author}\n  requête : ${JSON.stringify(L.guessQuery(song))}\n  ${preview(result)} [${Date.now() - t} ms]`);
+        if (song.expectMiss) check("introuvable → NOT_FOUND", !result.ok && result.error === "NOT_FOUND", result);
+        else check(`trouvé : ${song.title}`, result.ok && !!(result.plain || result.instrumental), result.error);
+        if (song.expectSynced) {
+            check(`synchronisées : ${song.title}`, result.ok && result.synced);
+            // Horodatages exploitables : croissants, en ms, dans la durée du morceau
+            const lines = result.ok && Array.isArray(result.lines) ? result.lines : [];
+            const texts = lines.filter(l => l.text);
+            const sorted = lines.every((l, i) => Number.isInteger(l.t) && l.t >= 0 && (i === 0 || l.t >= lines[i - 1].t));
+            const last = lines.length ? lines[lines.length - 1].t : 0;
+            check(`horodatages croissants (${texts.length} lignes)`, texts.length >= 10 && sorted && last > 30000 && last <= (song.duration + 15) * 1000, { lines: lines.length, last });
+            check("User-Agent identifiant envoyé", /^Subsonics-Chopin\/\S+ \(https?:\/\//.test(L.USER_AGENT));
+        }
+        check("songKey", result.songKey === `${song.type}:${song.id}`);
+    }
+
+    const t = Date.now();
+    await L.getLyricsForSong(SONGS[0]);
+    check("2e appel servi par le cache", Date.now() - t < 50);
+
+    const search = await L.searchCandidates("daft punk one more time");
+    console.log(`\nsearchCandidates : ${search.ok ? search.results.length + " résultats" : search.error}`);
+    if (search.ok) for (const c of search.results.slice(0, 5)) console.log(`  #${c.id} ${c.artist} - ${c.track} (${c.album}, ${c.duration} s${c.synced ? ", synchro" : ""})`);
+    check("searchCandidates ok", search.ok && search.results.length > 0);
+
+    if (search.ok && search.results.length) {
+        const byId = await L.getById(search.results[0].id);
+        console.log(`getById(${search.results[0].id}) : ${preview(byId)}`);
+        check("getById ok", byId.ok);
+    }
+
+    const legacy = await L.getLyrics("Daft Punk - One More Time");
+    check("getLyrics (compat) renvoie du texte", typeof legacy === "string" && legacy.length > 20);
+
+    // Repli : LRCLIB rendu injoignable, Deezer + lyrics.ovh réels
+    console.log("\nRepli lyrics.ovh (LRCLIB simulé en panne)");
+    const realFetch = globalThis.fetch;
+    const hosts = [];
+    globalThis.fetch = async (input, options) => {
+        const host = new URL(String(input)).host;
+        hosts.push(host);
+        if (host === "lrclib.net") throw new TypeError("fetch failed");
+        return realFetch(input, options);
+    };
+    try {
+        L.clearCache();
+        const t0 = Date.now();
+        const fallback = await L.getLyricsForSong({ type: "youtube", id: "ovh-test", title: "Coldplay - Yellow (Official Video)", author: "Coldplay", duration: 269 });
+        console.log(`  ${fallback.ok ? preview(fallback) : "échec " + fallback.error} [${Date.now() - t0} ms] · hôtes : ${[...new Set(hosts)].join(", ")}`);
+        check("repli tenté (Deezer puis lyrics.ovh)", hosts.includes("api.deezer.com") && hosts.includes("api.lyrics.ovh"), [...new Set(hosts)]);
+        if (fallback.ok) {
+            check("repli : texte seul depuis lyrics.ovh", fallback.source === "lyrics.ovh" && !fallback.synced && fallback.lines === null && fallback.plain.length > 100);
+        } else {
+            // lyrics.ovh est souvent en panne : signalé sans faire échouer le test
+            console.log(`  AVERTISSEMENT : lyrics.ovh n'a rien renvoyé (${fallback.error}), le repli n'a pas pu être vérifié de bout en bout`);
+            check("repli en panne → UNAVAILABLE (LRCLIB injoignable)", fallback.error === "UNAVAILABLE");
+        }
+    } finally {
+        globalThis.fetch = realFetch;
+    }
+    done();
+})().catch((error) => {
+    console.error(error);
+    process.exitCode = 1;
+});
diff --git a/tests/dev/lyrics.test.js b/tests/dev/lyrics.test.js
new file mode 100644
index 0000000..a76a4d2
--- /dev/null
+++ b/tests/dev/lyrics.test.js
@@ -0,0 +1,390 @@
+// Tests hors réseau de backend/src/lyrics/Lyrics.js (node lyrics.test.js) : fetch global remplacé par un faux
+const { check, done, req } = require("./_setup");
+const L = req("src/lyrics/Lyrics.js");
+
+const realFetch = globalThis.fetch;
+let calls = [];
+let route = () => json(404, { message: "not found" });
+
+function json(status, body) {
+    return new Response(JSON.stringify(body), { status, headers: { "content-type": "application/json" } });
+}
+function mock(handler) {
+    calls = [];
+    route = handler;
+    L.clearCache();
+}
+globalThis.fetch = async (input, options = {}) => {
+    const url = new URL(String(input));
+    calls.push({ url, options });
+    return route(url, options);
+};
+const eq = (a, b) => JSON.stringify(a) === JSON.stringify(b);
+
+const LRC = "[ar:Daft Punk]\n[ti:One More Time]\n[00:30.75] One more time\n[00:33.18] \n[00:46.35] Celebrate\n[00:50.00] Oh yeah\n";
+const PLAIN = "One more time\n\nCelebrate\nOh yeah";
+function record(over = {}) {
+    return {
+        id: 1, trackName: "One More Time", artistName: "Daft Punk", albumName: "Discovery", duration: 320,
+        instrumental: false, plainLyrics: PLAIN, syncedLyrics: LRC, ...over,
+    };
+}
+
+(async () => {
+    console.log("parseLrc");
+    {
+        check("texte non chaîne → []", eq(L.parseLrc(null), []) && eq(L.parseLrc(42), []) && eq(L.parseLrc(""), []));
+        const lines = L.parseLrc(LRC);
+        check("métadonnées ignorées, lignes vides gardées", eq(lines, [
+            { t: 30750, text: "One more time" }, { t: 33180, text: "" }, { t: 46350, text: "Celebrate" }, { t: 50000, text: "Oh yeah" },
+        ]), lines);
+        check("[mm:ss] sans fraction", eq(L.parseLrc("[01:02]Bye"), [{ t: 62000, text: "Bye" }]));
+        check("fractions .x / .xx / .xxx / :xx", eq(L.parseLrc("[00:01.5]a\n[00:02.25]b\n[00:03.125]c\n[00:04:50]d").map(l => l.t), [1500, 2250, 3125, 4500]));
+        const multi = L.parseLrc("[00:20.00][00:05.00]Refrain\n[00:10.00]Couplet");
+        check("plusieurs horodatages par ligne + tri", eq(multi, [
+            { t: 5000, text: "Refrain" }, { t: 10000, text: "Couplet" }, { t: 20000, text: "Refrain" },
+        ]), multi);
+        check("[offset:+500] avance les paroles", eq(L.parseLrc("[offset:+500]\n[00:10.00]a").map(l => l.t), [9500]));
+        check("[offset:-250] retarde les paroles", eq(L.parseLrc("[offset:-250]\n[00:10.00]a").map(l => l.t), [10250]));
+        check("offset ne rend pas de temps négatif", eq(L.parseLrc("[offset:2000]\n[00:01.00]a").map(l => l.t), [0]));
+        check("CRLF, BOM et horodatages par mot", eq(L.parseLrc("[00:01.00]Hello <00:01.20>world\r\n[00:02.00]  x  "), [
+            { t: 1000, text: "Hello world" }, { t: 2000, text: "x" },
+        ]));
+        check("lignes sans horodatage ignorées, secondes invalides ignorées", eq(L.parseLrc("texte libre\n[00:75.00]x\n[00:03.00]ok"), [{ t: 3000, text: "ok" }]));
+        check("égalité de temps : ordre d'origine conservé", eq(L.parseLrc("[00:01.00]a\n[00:01.00]b").map(l => l.text), ["a", "b"]));
+    }
+
+    console.log("cleanTitle / cleanArtist");
+    {
+        check("Official Video + [HD]", L.cleanTitle("One More Time (Official Video) [HD]") === "One More Time");
+        check("Clip officiel / Lyrics", L.cleanTitle("Alors on danse (Clip Officiel)") === "Alors on danse" && L.cleanTitle("Hello (Lyrics)") === "Hello");
+        check("feat. retiré", L.cleanTitle("Get Lucky (feat. Pharrell Williams)") === "Get Lucky" && L.cleanTitle("Get Lucky ft. Pharrell") === "Get Lucky");
+        check("suffixe « - Remastered 2011 » retiré", L.cleanTitle("Bohemian Rhapsody - Remastered 2011") === "Bohemian Rhapsody");
+        check("suffixe « | … » retiré", L.cleanTitle("Titre | Clip officiel") === "Titre");
+        check("parenthèse de titre conservée", L.cleanTitle("(Don't Fear) The Reaper") === "(Don't Fear) The Reaper");
+        check("« (Remix) » conservé", L.cleanTitle("Song (Remix)") === "Song (Remix)");
+        check("« Video » dans un vrai titre conservé", L.cleanTitle("The Buggles - Video Killed the Radio Star") === "The Buggles - Video Killed the Radio Star");
+        check("titre entièrement parasite → original", L.cleanTitle("(Official Video)") === "(Official Video)");
+        check("vide / null", L.cleanTitle("") === "" && L.cleanTitle(null) === "");
+        check("Artist - Topic", L.cleanArtist("Stromae - Topic") === "Stromae");
+        check("ArtistVEVO → espaces", L.cleanArtist("DaftPunkVEVO") === "Daft Punk" && L.cleanArtist("Adele VEVO") === "Adele");
+        check("Official / feat.", L.cleanArtist("Daft Punk Official") === "Daft Punk" && L.cleanArtist("Daft Punk feat. Pharrell") === "Daft Punk");
+        check("Auteur inconnu → vide", L.cleanArtist("Auteur inconnu") === "");
+        check("AC/DC intact", L.cleanArtist("AC/DC") === "AC/DC");
+        check("longueur bornée à 200", L.cleanTitle("a".repeat(500)).length === 200);
+    }
+
+    console.log("guessQuery");
+    {
+        const g = (title, author, extra = {}) => L.guessQuery({ title, author, type: "youtube", ...extra });
+        check("Artiste - Titre (Official Video)", eq(g("Daft Punk - One More Time (Official Video)", "Daft Punk", { duration: 320.4 }), { track: "One More Time", artist: "Daft Punk", duration: 320 }));
+        check("chaîne VEVO sans tiret", eq(g("Never Gonna Give You Up", "RickAstleyVEVO"), { track: "Never Gonna Give You Up", artist: "Rick Astley", duration: 0 }));
+        check("chaîne de label → artiste du titre", eq(g("The Buggles - Video Killed the Radio Star", "Island Records"), { track: "Video Killed the Radio Star", artist: "The Buggles", duration: 0 }));
+        check("Titre - Artiste", eq(g("Shape of You - Ed Sheeran", "Ed Sheeran"), { track: "Shape of You", artist: "Ed Sheeran", duration: 0 }));
+        check("suffixe de version Spotify", eq(g("Hello - Live at Wembley", "Adele"), { track: "Hello", artist: "Adele", duration: 0 }));
+        check("feat. dans la partie artiste", eq(g("Daft Punk ft. Pharrell Williams - Get Lucky [HD] | Clip officiel", "Some Label"), { track: "Get Lucky", artist: "Daft Punk", duration: 0 }));
+        check("Artiste « Titre »", eq(g('Stromae "Alors on danse" (Clip officiel)', "StromaeVEVO"), { track: "Alors on danse", artist: "Stromae", duration: 0 }));
+        check("guillemets dans un titre Spotify", eq(g('Theme from "Shaft"', "Isaac Hayes"), { track: "Theme from Shaft", artist: "Isaac Hayes", duration: 0 }));
+        check("fichier envoyé", eq(L.guessQuery({ title: "01 - Muse - Uprising.mp3", author: "Auteur inconnu", type: "attachment" }), { track: "Uprising", artist: "Muse", duration: 0 }));
+        check("valeurs par défaut du Song → vide", eq(L.guessQuery({ title: "Aucun titre", author: "Auteur inconnu" }), { track: "", artist: "", duration: 0 }));
+        check("durée invalide → 0", L.guessQuery({ title: "x", duration: "abc" }).duration === 0 && L.guessQuery({ title: "x", duration: -3 }).duration === 0);
+        check("pas d'objet → vide", eq(L.guessQuery(null), { track: "", artist: "", duration: 0 }));
+    }
+
+    console.log("songKeyOf");
+    {
+        check("type:id", L.songKeyOf({ type: "youtube", id: "abc", url: "u" }) === "youtube:abc");
+        check("repli sur l'URL", L.songKeyOf({ type: "youtube", url: "https://x" }) === "https://x");
+        check("rien → null", L.songKeyOf({}) === null && L.songKeyOf(null) === null);
+    }
+
+    console.log("pickBestCandidate");
+    {
+        const q = { track: "One More Time", artist: "Daft Punk", duration: 320 };
+        const list = [
+            record({ id: 10, duration: 234, albumName: "Charts" }),
+            record({ id: 11, duration: 321, syncedLyrics: null }),
+            record({ id: 12, duration: 319 }),
+            record({ id: 13, trackName: "Around the World", duration: 320 }),
+            record({ id: 14, artistName: "Someone Else", duration: 330 }),
+        ];
+        check("synchronisé et durée proche", L.pickBestCandidate(list, q)?.id === 12);
+        check("titre différent rejeté", L.pickBestCandidate([list[3]], q) === null);
+        check("autre artiste rejeté", L.pickBestCandidate([list[4]], q) === null);
+        // Chaîne de label : titre identique et durée quasi exacte suffisent
+        check("autre artiste accepté si titre et durée exacts", L.pickBestCandidate([record({ id: 19, artistName: "Ed Banger Records", duration: 321 })], q)?.id === 19);
+        check("hors fenêtre seulement si rien de mieux", L.pickBestCandidate([list[0]], q)?.id === 10 && L.pickBestCandidate([list[0], list[1]], q)?.id === 11);
+        check("sans contenu ignoré", L.pickBestCandidate([record({ id: 15, syncedLyrics: "", plainLyrics: "" })], q) === null);
+        const upload = record({ id: 16, trackName: "Daft Punk - One More Time (Official Video)" });
+        check("saisie propre préférée à « Artiste - Titre (Official Video) »", L.pickBestCandidate([upload, record({ id: 17 })], q)?.id === 17);
+        const free = { track: "daft punk one more time", artist: "", duration: 0 };
+        check("texte libre : bon candidat", L.pickBestCandidate([list[3], record({ id: 18 })], free)?.id === 18);
+        check("texte libre : titre absent de la requête rejeté", L.pickBestCandidate([list[3]], free) === null);
+    }
+
+    console.log("getLyricsForSong (fetch simulé)");
+    {
+        const song = { type: "youtube", id: "FGBhQbmPwH8", title: "Daft Punk - One More Time (Official Video)", author: "Daft Punk", duration: 320, url: "https://www.youtube.com/watch?v=FGBhQbmPwH8" };
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record()) : json(404, {}));
+        let r = await L.getLyricsForSong(song);
+        check("LRCLIB /get → synchronisées", r.ok && r.source === "lrclib" && r.synced && r.lines.length === 4 && r.lines[0].t === 30750, r);
+        check("songKey renvoyé", r.songKey === "youtube:FGBhQbmPwH8");
+        check("plain et match remplis", r.plain === PLAIN && eq(r.match, { id: 1, track: "One More Time", artist: "Daft Punk", album: "Discovery", duration: 320 }) && r.instrumental === false);
+        const p = calls[0].url.searchParams;
+        check("paramètres /get nettoyés", calls[0].url.host === "lrclib.net" && p.get("artist_name") === "Daft Punk" && p.get("track_name") === "One More Time" && p.get("duration") === "320", calls[0].url.href);
+        check("User-Agent avec la version", /^Subsonics-Chopin\/\S+ \(https:\/\/git\.raphix\.fr\/subsonics\)$/.test(calls[0].options.headers["User-Agent"]) && L.USER_AGENT.includes(require("../../package.json").version));
+        check("délai d'attente fourni", calls[0].options.signal instanceof AbortSignal);
+        const before = calls.length;
+        const again = await L.getLyricsForSong({ ...song, id: "autreVideo" });
+        check("cache par requête (aucun nouvel appel), songKey propre", calls.length === before && again.songKey === "youtube:autreVideo" && again.synced);
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record()) : json(404, {}));
+        r = await L.getLyricsForSong({ ...song, duration: 0 });
+        check("durée 0 → pas de paramètre duration", r.ok && !calls[0].url.searchParams.has("duration"));
+
+        mock((url) => {
+            if (url.pathname === "/api/get") return json(404, { message: "Failed to find specified track" });
+            if (url.pathname === "/api/search" && url.searchParams.get("track_name")) {
+                return json(200, [record({ id: 30, duration: 210 }), record({ id: 31, duration: 321 }), record({ id: 32, trackName: "Digital Love", duration: 320 })]);
+            }
+            return json(200, []);
+        });
+        r = await L.getLyricsForSong(song);
+        check("/get 404 → recherche par champs, bon candidat", r.ok && r.match.id === 31 && r.synced, r.match);
+        check("recherche libre évitée si un candidat convient", !calls.some(c => c.url.searchParams.has("q")));
+
+        mock((url) => {
+            if (url.pathname === "/api/get") return json(404, {});
+            if (url.searchParams.has("q")) return json(200, [record({ id: 40, duration: 320 })]);
+            return json(200, []);
+        });
+        r = await L.getLyricsForSong(song);
+        check("puis recherche libre « artiste titre »", r.ok && r.match.id === 40 && calls.find(c => c.url.searchParams.has("q"))?.url.searchParams.get("q") === "Daft Punk One More Time");
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record({ duration: 260 })) : json(200, []));
+        r = await L.getLyricsForSong(song);
+        check("durée trop différente → texte seul", r.ok && r.synced === false && r.lines === null && r.plain === PLAIN, r);
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record({ duration: 260, plainLyrics: null })) : json(200, []));
+        r = await L.getLyricsForSong(song);
+        check("texte seul reconstruit depuis le LRC", r.ok && !r.synced && r.plain === PLAIN, r.plain);
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record({ instrumental: true, plainLyrics: null, syncedLyrics: null })) : json(404, {}));
+        r = await L.getLyricsForSong(song);
+        check("instrumental", r.ok && r.instrumental && !r.synced && r.lines === null && r.plain === null);
+
+        // Entrée d'essai réellement présente sur LRCLIB (« [00:00.00]probe ») : ignorée au profit de la recherche
+        mock((url) => {
+            if (url.pathname === "/api/get") return json(200, record({ id: 50, plainLyrics: "probe", syncedLyrics: "[00:00.00]probe" }));
+            if (url.pathname === "/api/search") return json(200, [record({ id: 50, plainLyrics: "probe", syncedLyrics: "[00:00.00]probe" }), record({ id: 51 })]);
+            return json(404, {});
+        });
+        r = await L.getLyricsForSong(song);
+        check("entrée vandalisée ignorée", r.ok && r.match.id === 51 && r.synced, r.match);
+
+        // 503 passager : une seule nouvelle tentative
+        let flaky = 0;
+        mock((url) => {
+            if (url.pathname === "/api/get") return ++flaky === 1 ? json(503, {}) : json(200, record());
+            return json(404, {});
+        });
+        r = await L.getLyricsForSong(song);
+        check("503 passager → nouvelle tentative réussie", r.ok && r.synced && flaky === 2);
+
+        mock((url) => {
+            if (url.host === "lrclib.net") return url.pathname === "/api/get" ? json(404, {}) : json(200, []);
+            if (url.host === "api.deezer.com") return json(200, { data: [
+                { id: 1, title: "Harder, Better, Faster, Stronger", artist: { name: "Daft Punk" }, album: { title: "Discovery" }, duration: 224 },
+                { id: 2, title: "One More Time (Radio Edit)", title_short: "One More Time", artist: { name: "Daft Punk" }, album: { title: "Discovery" }, duration: 320 },
+            ] });
+            if (url.host === "api.lyrics.ovh") return json(200, { lyrics: "Paroles de la chanson One More Time par Daft Punk\r\nOne more time\r\n\r\n\r\nCelebrate\r\nOh yeah" });
+            return json(404, {});
+        });
+        r = await L.getLyricsForSong(song);
+        check("repli Deezer + lyrics.ovh", r.ok && r.source === "lyrics.ovh" && !r.synced && r.lines === null && r.plain === PLAIN, r);
+        const ovh = calls.find(c => c.url.host === "api.lyrics.ovh");
+        check("lyrics.ovh interrogé avec le bon candidat Deezer", ovh && decodeURIComponent(ovh.url.pathname) === "/v1/Daft Punk/One More Time", ovh?.url.pathname);
+        check("Deezer en https", calls.find(c => c.url.host === "api.deezer.com")?.url.protocol === "https:");
+
+        mock(() => json(404, { error: "No lyrics found" }));
+        r = await L.getLyricsForSong(song);
+        check("rien nulle part → NOT_FOUND + songKey", !r.ok && r.error === "NOT_FOUND" && r.songKey === "youtube:FGBhQbmPwH8", r);
+        const n = calls.length;
+        await L.getLyricsForSong(song);
+        check("échec mis en cache", calls.length === n);
+
+        mock((url) => {
+            if (url.host === "lrclib.net") throw new TypeError("fetch failed");
+            return json(404, {});
+        });
+        r = await L.getLyricsForSong(song);
+        check("LRCLIB injoignable → repli puis UNAVAILABLE", !r.ok && r.error === "UNAVAILABLE" && calls.filter(c => c.url.host === "lrclib.net").length === 2 && calls.every(c => c.url.pathname !== "/api/search"), calls.map(c => c.url.href));
+
+        mock((url) => url.host === "lrclib.net" ? json(500, {}) : json(404, {}));
+        r = await L.getLyricsForSong(song);
+        check("HTTP 500 → UNAVAILABLE", !r.ok && r.error === "UNAVAILABLE");
+
+        mock(() => json(200, record()));
+        check("pas de morceau → NO_MUSIC", eq(await L.getLyricsForSong(null), { ok: false, error: "NO_MUSIC" }));
+        r = await L.getLyricsForSong({ type: "youtube", id: "x", title: "Aucun titre", author: "Auteur inconnu" });
+        check("titre vide → INVALID_PARAMS", !r.ok && r.error === "INVALID_PARAMS" && r.songKey === "youtube:x" && calls.length === 0);
+    }
+
+    console.log("searchCandidates / getById / findLyrics / getLyrics");
+    {
+        mock(() => json(200, record()));
+        for (const bad of [undefined, null, 42, "", "   ", "x".repeat(201), { q: "x" }]) {
+            const r = await L.searchCandidates(bad);
+            check(`searchCandidates(${JSON.stringify(bad)?.slice(0, 20)}) → INVALID_PARAMS`, eq(r, { ok: false, error: "INVALID_PARAMS" }));
+        }
+        check("aucune requête pour une entrée invalide", calls.length === 0);
+
+        mock(() => json(200, [record({ id: 5 }), record({ id: 6, syncedLyrics: null, instrumental: true, albumName: null }), { bad: true }]));
+        let r = await L.searchCandidates("  daft punk one more time ");
+        check("candidats mis en forme", r.ok && eq(r.results, [
+            { id: 5, track: "One More Time", artist: "Daft Punk", album: "Discovery", duration: 320, synced: true, instrumental: false },
+            { id: 6, track: "One More Time", artist: "Daft Punk", album: "", duration: 320, synced: false, instrumental: true },
+        ]), r);
+        check("requête q transmise", calls[0].url.pathname === "/api/search" && calls[0].url.searchParams.get("q") === "daft punk one more time");
+
+        mock(() => { throw new TypeError("fetch failed"); });
+        r = await L.searchCandidates("abc");
+        check("réseau en panne → UNAVAILABLE", eq(r, { ok: false, error: "UNAVAILABLE" }));
+        route = () => json(200, []);
+        r = await L.searchCandidates("abc");
+        check("UNAVAILABLE non mis en cache", r.ok && eq(r.results, []));
+
+        mock((url) => url.pathname === "/api/get/77" ? json(200, record({ id: 77, duration: 100 })) : json(404, {}));
+        for (const bad of [0, -1, 1.5, "abc", null, {}, Number.MAX_SAFE_INTEGER + 2]) {
+            check(`getById(${JSON.stringify(bad)}) → INVALID_PARAMS`, (await L.getById(bad)).error === "INVALID_PARAMS");
+        }
+        r = await L.getById(77);
+        check("getById garde la synchro (choix manuel)", r.ok && r.synced && r.match.id === 77 && r.songKey === null, r);
+        check("getById accepte une chaîne numérique", (await L.getById("77")).ok);
+        check("getById inconnu → NOT_FOUND", (await L.getById(78)).error === "NOT_FOUND");
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record()) : json(404, {}));
+        r = await L.findLyrics({ track: "One More Time (Official Video)", artist: "DaftPunkVEVO", duration: 320 });
+        check("findLyrics objet", r.ok && r.synced && r.songKey === null && calls[0].url.searchParams.get("artist_name") === "Daft Punk");
+        check("findLyrics invalide", (await L.findLyrics({ track: "" })).error === "INVALID_PARAMS"
+            && (await L.findLyrics({ track: "a", artist: 3 })).error === "INVALID_PARAMS"
+            && (await L.findLyrics({ track: "a", duration: "x" })).error === "INVALID_PARAMS"
+            && (await L.findLyrics(["a"])).error === "INVALID_PARAMS"
+            && (await L.findLyrics("x".repeat(201))).error === "INVALID_PARAMS");
+
+        mock((url) => url.searchParams.has("q") ? json(200, [record({ id: 90, trackName: "Time" }), record({ id: 91 })]) : json(404, {}));
+        r = await L.findLyrics("daft punk one more time");
+        check("findLyrics texte libre", r.ok && r.match.track === "One More Time", r);
+
+        mock((url) => url.pathname === "/api/get" ? json(200, record()) : json(404, {}));
+        const text = await L.getLyrics("Daft Punk - One More Time");
+        check("getLyrics (compat) → texte brut", text === PLAIN, text);
+        mock(() => json(404, {}));
+        check("getLyrics (compat) → null si rien", (await L.getLyrics("zzz introuvable")) === null && (await L.getLyrics(null)) === null);
+    }
+
+    console.log("titres YouTube supplémentaires");
+    {
+        const g = (title, author, extra = {}) => L.guessQuery({ title, author, type: "youtube", ...extra });
+        check("Artiste - Titre (Official Video) [4K]", eq(g("Daft Punk - Around the World (Official Video) [4K]", "Daft Punk"), { track: "Around the World", artist: "Daft Punk", duration: 0 }));
+        check("Titre (Official Music Video) 4K sans tiret", L.cleanTitle("Blinding Lights (Official Music Video) 4K") === "Blinding Lights");
+        check("chaîne « - Topic » + feat. dans le titre", eq(g("Instant Crush (feat. Julian Casablancas)", "Daft Punk - Topic", { duration: 337 }), { track: "Instant Crush", artist: "Daft Punk", duration: 337 }));
+        check("ft. en fin de titre", L.cleanTitle("Stay ft. Justin Bieber") === "Stay");
+        check("Titre [Lyrics] / (Audio)", L.cleanTitle("Bad Guy [Lyrics]") === "Bad Guy" && L.cleanTitle("Lose Yourself (Audio)") === "Lose Yourself");
+        check("« (Official Video) » + émoji", L.cleanTitle("🔥 Alors on danse (Official Video) 🔥") === "Alors on danse");
+        check("suffixe « - Live » conservé comme version : titre seul", eq(g("Hey Jude - Live", "The Beatles"), { track: "Hey Jude", artist: "The Beatles", duration: 0 }));
+        check("chaîne Official + titre sans tiret", eq(g("Bohemian Rhapsody (Official Video Remastered)", "Queen Official"), { track: "Bohemian Rhapsody", artist: "Queen", duration: 0 }));
+    }
+
+    console.log("similarity / rankCandidates");
+    {
+        check("identique → 1", L.similarity("One More Time", "one more time") === 1);
+        check("accents et apostrophes ignorés", L.similarity("Je t'aime", "Je taime") === 1 && L.similarity("Éléphant", "elephant") === 1);
+        check("espaces ignorés → 0.95", L.similarity("AC DC", "ACDC") === 0.95);
+        check("inclusion → ≥ 0.6", L.similarity("One More Time", "One More Time Radio Edit") >= 0.6);
+        check("rien en commun → 0", L.similarity("Hello", "Goodbye") === 0 && L.similarity("", "x") === 0);
+        const ranked = L.rankCandidates([
+            record({ id: 1, trackName: "Something Else", artistName: "Nobody" }),
+            record({ id: 2, trackName: "Daft Punk - One More Time (Official Video)" }),
+            record({ id: 3, syncedLyrics: null }),
+            record({ id: 4 }),
+        ], "daft punk one more time");
+        check("classement : synchro propre, synchro bruitée, texte seul, hors sujet", eq(ranked.map(r => r.id), [4, 2, 3, 1]), ranked.map(r => r.id));
+        check("rankCandidates ne modifie pas l'entrée", (() => { const list = [record({ id: 9 })]; L.rankCandidates(list, "x"); return list.length === 1; })());
+    }
+
+    console.log("durées de cache (horloge simulée)");
+    {
+        const MIN = 60 * 1000;
+        const HOUR = 60 * MIN;
+        check("ttl trouvé 6 h", L.ttlForResult({ ok: true }) === 6 * HOUR);
+        check("ttl introuvable 20 min", L.ttlForResult({ ok: false, error: "NOT_FOUND" }) === 20 * MIN);
+        check("ttl indisponible 1 min", L.ttlForResult({ ok: false, error: "UNAVAILABLE" }) === MIN);
+        check("ttl autre erreur / rien → 0", L.ttlForResult({ ok: false, error: "INVALID_PARAMS" }) === 0 && L.ttlForResult(null) === 0);
+
+        const realNow = Date.now;
+        // Horloge monotone : le limiteur retient l'heure du dernier démarrage, reculer le bloquerait
+        let offset = 0;
+        let base = 0;
+        const at = (ms) => { offset = base + ms; };
+        const nextScenario = () => { base = offset + HOUR; offset = base; };
+        Date.now = () => realNow() + offset;
+        try {
+            const song = { type: "youtube", id: "ttl", title: "Daft Punk - One More Time", author: "Daft Punk", duration: 320 };
+            const lrclibCalls = () => calls.filter(c => c.url.host === "lrclib.net").length;
+
+            mock((url) => url.pathname === "/api/get" ? json(200, record()) : json(404, {}));
+            await L.getLyricsForSong(song);
+            let n = lrclibCalls();
+            at(6 * HOUR - MIN);
+            await L.getLyricsForSong(song);
+            check("trouvé : encore en cache à 5 h 59", lrclibCalls() === n);
+            at(6 * HOUR + MIN);
+            await L.getLyricsForSong(song);
+            check("trouvé : redemandé après 6 h", lrclibCalls() > n);
+
+            nextScenario();
+            mock(() => json(404, {}));
+            await L.getLyricsForSong(song);
+            n = calls.length;
+            at(19 * MIN);
+            await L.getLyricsForSong(song);
+            check("introuvable : en cache à 19 min", calls.length === n);
+            at(21 * MIN);
+            await L.getLyricsForSong(song);
+            check("introuvable : redemandé après 20 min", calls.length > n);
+
+            nextScenario();
+            mock((url) => { if (url.host === "lrclib.net") throw new TypeError("fetch failed"); return json(404, {}); });
+            await L.getLyricsForSong(song);
+            n = calls.length;
+            at(30 * 1000);
+            await L.getLyricsForSong(song);
+            check("indisponible : en cache 30 s", calls.length === n);
+            at(61 * 1000);
+            await L.getLyricsForSong(song);
+            check("indisponible : redemandé après 1 min", calls.length > n);
+
+            nextScenario();
+            mock(() => json(200, [record({ id: 5 })]));
+            await L.searchCandidates("daft punk");
+            n = calls.length;
+            at(9 * MIN);
+            await L.searchCandidates("Daft  Punk");
+            check("recherche manuelle : cache 10 min (requête normalisée)", calls.length === n);
+            at(11 * MIN);
+            await L.searchCandidates("daft punk");
+            check("recherche manuelle : redemandée après 10 min", calls.length > n);
+        } finally {
+            Date.now = realNow;
+        }
+    }
+
+    globalThis.fetch = realFetch;
+    done();
+})().catch((error) => {
+    globalThis.fetch = realFetch;
+    console.error(error);
+    process.exitCode = 1;
+});
diff --git a/tests/dev/server-socket.test.js b/tests/dev/server-socket.test.js
index 97c113c..c1e922f 100644
--- a/tests/dev/server-socket.test.js
+++ b/tests/dev/server-socket.test.js
@@ -20,6 +20,7 @@ const raw = {
     A: { id: "A", tokens: ["tA1", "tA2"], labels: ["ADMIN"] },
     B: { id: "B", tokens: ["tB"], labels: [] },
     C: { id: "C", tokens: ["tC"], labels: [] },
+    D: { id: "D", tokens: ["tD"], labels: [] },
 }
 function makeUser(r) {
     if (!r) return null
@@ -48,7 +49,7 @@ const usersStub = {
 
 // --- Bot / players ---
 const guilds = new Map([
-    ["g1", { id: "g1", name: "Guilde 1", owner: "C", allMembers: ["A", "B", "C"] }],
+    ["g1", { id: "g1", name: "Guilde 1", owner: "C", allMembers: ["A", "B", "C", "D"] }],
     ["g2", { id: "g2", name: "Guilde 2", owner: "A", allMembers: ["A", "B"] }],
 ])
 const AllPlayers = new Map()
@@ -76,9 +77,68 @@ const adminStub = {
 const fakeLog = { LogType: class { constructor() { this.step = { init() {}, end() {} } } log() {} warn() {} error(m) { if (process.env.VERBOSE) console.log("[error]", m) } } }
 let reportResult = false
 let finderThrows = true
+
+// --- Playlists personnelles (mémoire) : l'ordre est appliqué par le vrai PlaylistUtils (chargé après les stubs) ---
+const personal = {
+    C: [{ playlistId: "1", title: "Un", songs: [] }, { playlistId: "2", title: "Deux", songs: [] }, { playlistId: "3", title: "Trois", songs: [] }],
+}
+const playlistsStub = {
+    syncYoutube: async () => ({ ok: true }),
+    getPlaylistsOfUser: (id) => personal[id] || [],
+    getPlaylistOfUser: (id, pid) => (personal[id] || []).find(p => p.playlistId === String(pid)) || null,
+    reorderPlaylists: (id, order) => require(SRC + "/playlists/PlaylistUtils").applyOrder(personal[id] || [], order),
+    hasRoomForPlaylist: (id) => (personal[id] || []).length < 500,
+    MAX_PLAYLISTS: 500,
+    addPlaylistCopy: (id, playlist) => { const copy = { ...playlist, playlistId: "copy" + Date.now() }; (personal[id] ||= []).push(copy); return copy },
+}
+
+// --- Playlists partagées (mémoire) et réglage par serveur ---
+const sharedSettings = new Map()
+const getShared = (g) => ({ enabled: false, editors: "members", ...(sharedSettings.get(g) || {}) })
+const serverSettingsStub = {
+    getSecureRole: () => null,
+    getSharedPlaylists: getShared,
+    setSharedPlaylists: (g, patch) => {
+        if (!patch || !Object.keys(patch).length) return null
+        if (patch.enabled !== undefined && typeof patch.enabled !== "boolean") return null
+        if (patch.editors !== undefined && !["members", "mods"].includes(patch.editors)) return null
+        const next = { ...getShared(g), ...patch }
+        sharedSettings.set(g, next)
+        return next
+    },
+}
+const guildLists = { g1: [{ playlistId: "10", title: "Commune", songs: [], createdBy: { id: "A", username: "userA" } }] }
+const guildPlaylistsStub = {
+    getPlaylists: (g) => guildLists[g] || [],
+    getPlaylist: (g, id) => (guildLists[g] || []).find(p => p.playlistId === String(id)) || null,
+    countPlaylists: (g) => (guildLists[g] || []).length,
+    deletePlaylist: (g, id) => { const list = guildLists[g] || []; const i = list.findIndex(p => p.playlistId === String(id)); if (i === -1) return false; list.splice(i, 1); return true },
+    createPlaylist: async (g, input, user) => {
+        const playlist = { playlistId: String(Date.now()), title: input.name, songs: [], scope: "guild", guildId: g, createdBy: { id: user.id, username: user.username } }
+        ;(guildLists[g] ||= []).push(playlist)
+        return { ok: true, playlist }
+    },
+}
+
+// --- Paroles : searchCandidates seulement (getById absent → UNAVAILABLE) ---
+const lyricsCalls = []
+const lyricsStub = {
+    searchCandidates: async (q) => { lyricsCalls.push(q); return { ok: true, results: [{ id: 1, track: q, artist: "x", album: null, duration: 100, synced: true, instrumental: false }] } },
+    getLyricsForSong: async (song) => { lyricsCalls.push(song); return { ok: false, error: "NOT_FOUND", songKey: null } },
+    findLyrics: async (query) => { lyricsCalls.push(query); return { ok: false, error: "NOT_FOUND", songKey: null } },
+}
+
 const stubs = {
     "loguix": fakeLog,
-    [norm(SRC + "/utils/SafeMetric")]: { getGuildMetrics: () => [], toSafeNumber: (v) => v },
+    [norm(SRC + "/utils/SafeMetric")]: {
+        getGuildMetrics: (g) => g === "g1" ? [
+            { name: "numberOfMusicPlayed_g1", value: 12 },
+            { name: "numberOfSecondsPlayed_g1", value: "3600.4" },
+            { name: "numberOfCommands_g1", value: NaN },
+        ] : [],
+        toSafeNumber: (v, fallback = 0) => typeof v === "number" ? (Number.isFinite(v) ? v : fallback) : (typeof v === "string" && /^\s*-?\d+(\.\d+)?\s*$/.test(v) ? Number(v) : fallback),
+        toSafeDuration: (v) => { const n = Number(v); return Number.isFinite(n) && n > 0 && n <= 86400 ? n : 0 },
+    },
     [norm(SRC + "/server/auth/Session")]: { checkSession: () => false, addSession: () => "sess", removeSession() {} },
     [norm(SRC + "/server/auth/User")]: usersStub,
     [norm(SRC + "/player/Player")]: { Player: FakePlayer, AllPlayers, offlineState: (g) => ({ v: 2, guildId: g, status: "offline" }), getPlayer: () => { throw new Error("getPlayer ne doit plus être appelé") }, getAllPlayers: () => [...AllPlayers.values()] },
@@ -86,10 +146,11 @@ const stubs = {
     [norm(SRC + "/server/auth/DiscordAuth")]: {},
     [norm(SRC + "/discord/ReportSender")]: { Report: class { async send() { return reportResult } } },
     [norm(SRC + "/player/Finder")]: { search: async () => { if (finderThrows) throw new Error("panne simulée"); return [] } },
-    [norm(SRC + "/playlists/PlaylistManager")]: { syncYoutube: async () => ({ ok: true }) },
+    [norm(SRC + "/playlists/PlaylistManager")]: playlistsStub,
+    [norm(SRC + "/playlists/GuildPlaylists")]: guildPlaylistsStub,
     [norm(SRC + "/playlists/History")]: { getPersonalHistory: () => [], addToPersonalHistory() {}, clearPersonalHistory: async () => {} },
-    [norm(SRC + "/lyrics/Lyrics")]: {},
-    [norm(SRC + "/discord/ServerSettings")]: { getSecureRole: () => null },
+    [norm(SRC + "/lyrics/Lyrics")]: lyricsStub,
+    [norm(SRC + "/discord/ServerSettings")]: serverSettingsStub,
     [norm(SRC + "/discord/MediaBase")]: {},
     [norm(SRC + "/playlists/Google/OAuth2")]: { getStatus: (id) => ({ configured: false, linked: false, user: id }), isSyncing: () => false },
     [norm(SRC + "/utils/Database/Configuration")]: { getPort: () => PORT },
@@ -218,6 +279,112 @@ function serverSocket(client) { return ioRef.sockets.sockets.get(client.id) }
     const status = await new Promise(r => c.emit("/GOOGLE/STATUS", null, r))
     assert.strictEqual(status.user, "C")
 
+    // --- Playlists partagées : option, droits, poussées (réponses par acquittement) ---
+    const ackReq = (s, event, data) => new Promise((resolve, reject) => {
+        s.emit(event, data, resolve)
+        setTimeout(() => reject(new Error("pas d'acquittement " + event)), 3000)
+    })
+    const d = await connect("tD")
+    assert.strictEqual(await request(d, "/GUILD/JOIN", "g1"), true)
+    let list = await ackReq(d, "/GUILD/PLAYLISTS/LIST")
+    assert.ok(list.ok && list.guildId === "g1" && list.settings.enabled === false, "LIST désactivé : " + JSON.stringify(list))
+    assert.deepStrictEqual(list.playlists, [], "désactivé : playlists masquées")
+    assert.strictEqual(list.canEdit, false)
+    let r = await ackReq(d, "/GUILD/PLAYLISTS/CREATE", { name: "Test" })
+    assert.strictEqual(r.error, "DISABLED")
+    r = await ackReq(d, "/OWNER/PLAYLISTS/SETTINGS", { enabled: true })
+    assert.strictEqual(r.error, "FORBIDDEN", "un membre ne gère pas l'option")
+    assert.ok(!sharedSettings.has("g1"), "aucun réglage écrit par un refus")
+
+    const pushed = new Promise(res => d.once("/GUILD/PLAYLISTS/UPDATE", res))
+    r = await ackReq(c, "/OWNER/PLAYLISTS/SETTINGS", { enabled: true })
+    assert.ok(r.ok && r.settings.enabled === true && r.settings.editors === "members", JSON.stringify(r))
+    assert.deepStrictEqual(await pushed, { guildId: "g1" }, "poussée /GUILD/PLAYLISTS/UPDATE à la room du serveur")
+    r = await ackReq(c, "/OWNER/PLAYLISTS/SETTINGS", { editors: "tous" })
+    assert.strictEqual(r.error, "INVALID_PARAMS")
+
+    list = await ackReq(d, "/GUILD/PLAYLISTS/LIST")
+    assert.ok(list.ok && list.canEdit === true && list.canManage === false && list.playlists.length === 1, JSON.stringify(list))
+    r = await ackReq(d, "/GUILD/PLAYLISTS/CREATE", { name: "   " })
+    assert.strictEqual(r.error, "INVALID_PARAMS", "nom vide refusé")
+    r = await ackReq(d, "/GUILD/PLAYLISTS/CREATE", { name: "x".repeat(101) })
+    assert.strictEqual(r.error, "INVALID_PARAMS", "nom de plus de 100 caractères refusé")
+    r = await ackReq(d, "/GUILD/PLAYLISTS/CREATE", { name: "  De D  " })
+    assert.ok(r.ok && r.playlist.title === "De D" && r.playlist.createdBy.id === "D", JSON.stringify(r))
+    const createdByD = r.playlist.playlistId
+
+    // Modérateurs seulement : D (simple membre) ne modifie plus, mais peut supprimer SA playlist
+    r = await ackReq(c, "/OWNER/PLAYLISTS/SETTINGS", { editors: "mods" })
+    assert.ok(r.ok && r.settings.editors === "mods" && r.settings.enabled === true)
+    list = await ackReq(d, "/GUILD/PLAYLISTS/LIST")
+    assert.strictEqual(list.canEdit, false)
+    r = await ackReq(d, "/GUILD/PLAYLISTS/CREATE", { name: "Refusée" })
+    assert.strictEqual(r.error, "FORBIDDEN")
+    // Toutes les routes d'écriture sont refusées à un simple membre (vérifié avant le module)
+    for (const [route, payload] of [
+        ["/GUILD/PLAYLISTS/RENAME", { id: "10", newName: "Piratée" }],
+        ["/GUILD/PLAYLISTS/ADD_SONG", { id: "10", song: { type: "youtube", id: "x", title: "x", url: "https://www.youtube.com/watch?v=x" } }],
+        ["/GUILD/PLAYLISTS/REMOVE_SONG", { id: "10", songId: "x" }],
+        ["/GUILD/PLAYLISTS/MOVE_SONG", { id: "10", from: 0, to: 1 }],
+        ["/GUILD/PLAYLISTS/REORDER", { order: ["10"] }],
+        ["/GUILD/PLAYLISTS/REFRESH", { id: "10" }],
+        ["/GUILD/PLAYLISTS/IMPORT", { playlistId: "1" }],
+    ]) {
+        r = await ackReq(d, route, payload)
+        assert.strictEqual(r.error, "FORBIDDEN", route + " refusé à un membre en mode modérateurs : " + JSON.stringify(r))
+    }
+    assert.strictEqual(guildLists.g1.find(p => p.playlistId === "10").title, "Commune", "aucune modification par un refus")
+    r = await ackReq(d, "/GUILD/PLAYLISTS/DELETE", { id: "10" })
+    assert.strictEqual(r.error, "FORBIDDEN", "playlist d'un autre membre")
+    r = await ackReq(d, "/GUILD/PLAYLISTS/DELETE", { id: createdByD })
+    assert.ok(r.ok, "le créateur supprime sa playlist : " + JSON.stringify(r))
+    r = await ackReq(c, "/GUILD/PLAYLISTS/DELETE", { id: "inconnue" })
+    assert.strictEqual(r.error, "NOT_FOUND")
+    const ginfo = await request(d, "/GUILD/INFO")
+    assert.deepStrictEqual(ginfo.sharedPlaylists, { enabled: true, editors: "mods", canEdit: false, canManage: false })
+    // Copie d'une playlist du serveur dans mes playlists : simple lecture (D n'est pas éditeur)
+    const personalPush = new Promise(res => d.once("/PLAYLISTS/UPDATE", res))
+    r = await ackReq(d, "/GUILD/PLAYLISTS/COPY", { id: "10" })
+    assert.ok(r.ok && r.playlist.title === "Commune", JSON.stringify(r))
+    await personalPush
+
+    // --- Playlists personnelles : réponses par acquittement + poussée à toutes les sessions ---
+    const cPush = new Promise(res => c.once("/PLAYLISTS/UPDATE", res))
+    assert.strictEqual(await ackReq(c, "/PLAYLISTS/REORDER", { order: ["3", "inconnu", "1", "3"] }), true)
+    await cPush
+    assert.deepStrictEqual(personal.C.map(p => p.playlistId), ["3", "1", "2"], "ordre appliqué, inconnus ignorés, oubliés à la suite")
+    assert.strictEqual(await ackReq(c, "/PLAYLISTS/REORDER", { order: "3,1" }), false)
+    const listed = await ackReq(c, "/PLAYLISTS/LIST")
+    assert.deepStrictEqual(listed.map(p => p.playlistId), ["3", "1", "2"])
+    assert.ok(Array.isArray(await request(c, "/PLAYLISTS/LIST")), "ancien client (événement du même nom)")
+    assert.strictEqual(await ackReq(c, "/PLAYLISTS/MOVE_SONG", { id: "1", from: 0, to: "x" }), false)
+    assert.strictEqual(await ackReq(c, "/PLAYLISTS/CREATE", { name: "" }), false)
+
+    // --- Paroles ---
+    r = await ackReq(c, "/PLAYER/LYRICS")
+    assert.deepStrictEqual(r, { ok: false, error: "NO_MUSIC" }, "rien en cours de lecture")
+    r = await ackReq(c, "/LYRICS/SEARCH", { q: "   " })
+    assert.strictEqual(r.error, "INVALID_PARAMS")
+    r = await ackReq(c, "/LYRICS/SEARCH", { q: "x".repeat(201) })
+    assert.strictEqual(r.error, "INVALID_PARAMS")
+    r = await ackReq(c, "/LYRICS/SEARCH", { q: "  daft punk one more time " })
+    assert.ok(r.ok && r.results[0].track === "daft punk one more time", JSON.stringify(r))
+    r = await ackReq(c, "/LYRICS/GET", { id: -4 })
+    assert.strictEqual(r.error, "INVALID_PARAMS")
+    r = await ackReq(c, "/LYRICS/GET", { id: 42 })
+    assert.strictEqual(r.error, "UNAVAILABLE", "fonction absente du module : UNAVAILABLE")
+    r = await request(c, "/SEARCH/LYRICS", { track: "Titre", artist: "Artiste", duration: 200 })
+    assert.strictEqual(r.error, "NOT_FOUND", "ancienne route : résultat du module")
+    assert.deepStrictEqual(lyricsCalls[lyricsCalls.length - 1], { track: "Titre", artist: "Artiste", duration: 200 })
+    r = await ackReq(c, "/SEARCH/LYRICS", "  artiste titre  ")
+    assert.strictEqual(lyricsCalls[lyricsCalls.length - 1], "artiste titre", "texte libre transmis tel quel (nettoyé)")
+    r = await ackReq(c, "/SEARCH/LYRICS", { track: "", artist: "x" })
+    assert.strictEqual(r.error, "INVALID_PARAMS")
+
+    // --- Statistiques publiques du serveur ---
+    r = await ackReq(d, "/GUILD/STATS")
+    assert.deepStrictEqual(r, { ok: true, musicPlayed: 12, secondsPlayed: 3600, commands: 0 })
+
     await sleep(100)
     assert.deepStrictEqual(uncaught, [], "aucune exception non gérée")
     console.log("server-socket.test.js : OK")