diff --git a/ucp/assets/ucp.js b/ucp/assets/ucp.js
index da3a99d..548d784 100644
--- a/ucp/assets/ucp.js
+++ b/ucp/assets/ucp.js
@@ -145,7 +145,11 @@ function switchUcpTab(tabName) {
         btn.className = isMe
             ? 'ucp-tab-btn px-3.5 py-2 rounded-xl text-xs font-semibold transition flex items-center gap-2 bg-indigo-50 text-indigo-700'
             : 'ucp-tab-btn px-3.5 py-2 rounded-xl text-xs font-semibold transition flex items-center gap-2 text-slate-600 hover:bg-slate-100';
+        if (isMe && typeof btn.scrollIntoView === 'function') {
+            btn.scrollIntoView({ behavior: 'smooth', inline: 'nearest', block: 'nearest' });
+        }
     });
+    setTimeout(updateUcpNavScrollHints, 120);
 
     if (tabName === 'voicemail') {
         loadVoicemailsForSelected();
@@ -989,6 +993,7 @@ if (passwordForm) {
 
 if (window.UCP_IS_AUTH) {
     refreshUcpState(false);
+    initUcpNavScrollHints();
     pollTimer = setInterval(() => {
         if (!document.hidden) {
             refreshUcpState(false);
@@ -996,3 +1001,33 @@ if (window.UCP_IS_AUTH) {
     }, 15000);
 }
 
+function updateUcpNavScrollHints() {
+    const scroller = document.getElementById('ucp-nav-scroller');
+    const leftHint = document.getElementById('ucp-nav-hint-left');
+    const rightHint = document.getElementById('ucp-nav-hint-right');
+    if (!scroller || !leftHint || !rightHint) return;
+
+    const hasLeft = scroller.scrollLeft > 4;
+    const hasRight = scroller.scrollLeft + scroller.clientWidth < scroller.scrollWidth - 4;
+
+    leftHint.classList.toggle('hidden', !hasLeft);
+    leftHint.classList.toggle('flex', hasLeft);
+    rightHint.classList.toggle('hidden', !hasRight);
+    rightHint.classList.toggle('flex', hasRight);
+}
+
+function scrollUcpNav(direction) {
+    const scroller = document.getElementById('ucp-nav-scroller');
+    if (!scroller) return;
+    scroller.scrollBy({ left: direction * 170, behavior: 'smooth' });
+}
+
+function initUcpNavScrollHints() {
+    const scroller = document.getElementById('ucp-nav-scroller');
+    if (!scroller) return;
+    scroller.addEventListener('scroll', updateUcpNavScrollHints, { passive: true });
+    window.addEventListener('resize', updateUcpNavScrollHints);
+    requestAnimationFrame(updateUcpNavScrollHints);
+    setTimeout(updateUcpNavScrollHints, 250);
+}
+
diff --git a/ucp/index.php b/ucp/index.php
index eba53cd..d9667d2 100644
--- a/ucp/index.php
+++ b/ucp/index.php
@@ -53,6 +53,13 @@ $csrfToken   = UcpAuth::getCsrfToken();
                 font-size: 16px !important;
             }
         }
+        .ucp-nav-scroll {
+            scrollbar-width: none;
+            -ms-overflow-style: none;
+        }
+        .ucp-nav-scroll::-webkit-scrollbar {
+            display: none;
+        }
         ::-webkit-scrollbar { width: 7px; height: 7px; }
         ::-webkit-scrollbar-track { background: #f1f5f9; }
         ::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
@@ -179,27 +186,32 @@ $csrfToken   = UcpAuth::getCsrfToken();
                             <span class="font-bold text-slate-900 text-sm sm:text-base truncate"><?= htmlspecialchars($companyName ?: 'NexusPBX') ?></span>
                             <span class="hidden sm:inline-flex px-2 py-0.5 rounded-full bg-indigo-50 text-indigo-700 border border-indigo-100 text-[10px] font-bold uppercase tracking-wide">UCP</span>
                         </div>
-                        <p class="text-[11px] text-slate-500 truncate">Espace personnel de <strong class="text-slate-700"><?= htmlspecialchars((string)($currentUser['display_name'] ?: $currentUser['username'])) ?></strong></p>
+                        <p class="text-[11px] text-slate-500 truncate"><span class="hidden sm:inline">Espace personnel de </span><strong class="text-slate-700"><?= htmlspecialchars((string)($currentUser['display_name'] ?: $currentUser['username'])) ?></strong></p>
                     </div>
                 </div>
 
                 <div class="flex items-center gap-2 shrink-0">
-                    <button type="button" onclick="refreshUcpState(true)" title="Actualiser"
+                    <button type="button" onclick="refreshUcpState(true)" title="Actualiser" aria-label="Actualiser"
                         class="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-xl border border-slate-200 bg-white hover:bg-slate-50 text-xs font-semibold text-slate-600 transition">
                         <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/></svg>
                         <span class="hidden sm:inline">Actualiser</span>
                     </button>
-                    <button type="button" onclick="ucpLogout()"
+                    <button type="button" onclick="ucpLogout()" title="Déconnexion" aria-label="Déconnexion"
                         class="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-xl border border-rose-200 bg-rose-50 hover:bg-rose-100 text-xs font-semibold text-rose-700 transition">
                         <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 16l4-4m0 0l-4-4m4 4H7m6 4v1a3 3 0 01-3 3H6a3 3 0 01-3-3V7a3 3 0 013-3h4a3 3 0 013 3v1"/></svg>
-                        <span>Déconnexion</span>
+                        <span class="hidden sm:inline">Déconnexion</span>
                     </button>
                 </div>
             </div>
 
-            <!-- Navigation Onglets -->
-            <div class="max-w-6xl mx-auto px-4 sm:px-6 border-t border-slate-100 overflow-x-auto">
-                <nav class="flex items-center gap-1 py-2 whitespace-nowrap" id="ucp-nav">
+            <!-- Navigation Onglets avec dégradé latéral discret sur mobile -->
+            <div class="relative max-w-6xl mx-auto border-t border-slate-100">
+                <button type="button" id="ucp-nav-hint-left" onclick="scrollUcpNav(-1)" aria-label="Onglets précédents"
+                    class="hidden absolute left-0 top-0 bottom-0 z-10 w-9 items-center justify-start pl-1 bg-gradient-to-r from-white via-white/95 to-transparent text-slate-400 hover:text-indigo-600 transition">
+                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.2" d="M15 19l-7-7 7-7"/></svg>
+                </button>
+                <div id="ucp-nav-scroller" class="ucp-nav-scroll px-4 sm:px-6 overflow-x-auto scroll-smooth">
+                    <nav class="flex items-center gap-1 py-2 whitespace-nowrap pr-6 sm:pr-0" id="ucp-nav">
                     <button type="button" data-ucp-tab="extensions" onclick="switchUcpTab('extensions')"
                         class="ucp-tab-btn px-3.5 py-2 rounded-xl text-xs font-semibold transition flex items-center gap-2 bg-indigo-50 text-indigo-700">
                         <span>📱 Mes Postes &amp; Renvois</span>
@@ -226,7 +238,12 @@ $csrfToken   = UcpAuth::getCsrfToken();
                         class="ucp-tab-btn px-3.5 py-2 rounded-xl text-xs font-semibold transition flex items-center gap-2 text-slate-600 hover:bg-slate-100">
                         <span>🔐 Mon Compte</span>
                     </button>
-                </nav>
+                    </nav>
+                </div>
+                <button type="button" id="ucp-nav-hint-right" onclick="scrollUcpNav(1)" aria-label="Onglets suivants"
+                    class="hidden absolute right-0 top-0 bottom-0 z-10 w-10 items-center justify-end pr-1.5 bg-gradient-to-l from-white via-white/95 to-transparent text-slate-400 hover:text-indigo-600 transition">
+                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.2" d="M9 5l7 7-7 7"/></svg>
+                </button>
             </div>
         </header>
 
diff --git a/version.json b/version.json
index a4dcf7a..e14e429 100644
--- a/version.json
+++ b/version.json
@@ -1,9 +1,10 @@
 {
-  "version": "2.5.5",
+  "version": "2.5.6",
   "codename": "Pulsar UCP",
   "release_date": "2026-11-11",
   "min_php_version": "8.2",
   "changelog": [
+    "Correctif v2.5.6 : ergonomie mobile iPhone (en-tête compact + dégradé latéral discret sur la barre d'onglets UCP sans scrollbar visible)",
     "Correctif v2.5.5 : suppression du zoom automatique iOS/iPhone sur les champs (<16px) et blocage du débordement horizontal mobile dans l'UCP",
     "Correctif v2.5.4 : correction du journal personnel UCP « Mes Appels » (correspondance caller_number/callee_number/canaux PJSIP et filtres Répondus/Manqués)",
     "Nouveauté v2.5.3 : onglet UCP « Notice & Codes » avec mémo pas-à-pas, codes de fonction dynamiques et export PDF / impression A4 corporate (logo, encarts, poste utilisateur)",