diff --git a/frontend/index.html b/frontend/index.html
index 96f3a2d..1c675da 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -4374,13 +4374,10 @@ curl -X POST https://votre-serveur.com/webhook \
             <div class="mt-sheet-handle"></div>
             <div class="mt-sheet-header">
                 <span class="mt-sheet-title">Fichiers ouverts</span>
-                <button
-                    class="mt-sheet-close"
-                    id="mt-sheet-close"
-                    aria-label="Fermer"
-                >
-                    ✕
-                </button>
+                <div class="mt-sheet-actions">
+                    <button class="mt-sheet-close-all" id="mt-close-all" title="Fermer tout" aria-label="Fermer tous les fichiers">Fermer tout</button>
+                    <button class="mt-sheet-close" id="mt-sheet-close" aria-label="Fermer">✕</button>
+                </div>
             </div>
             <div class="mt-sheet-list" id="mt-tab-list"></div>
         </div>
diff --git a/frontend/js/ai.js b/frontend/js/ai.js
index b5b6559..34da007 100644
--- a/frontend/js/ai.js
+++ b/frontend/js/ai.js
@@ -212,8 +212,11 @@ export async function createAIToolbar(container, getEditorView) {
     gap: '2px',
     padding: '4px 8px',
     borderBottom: '1px solid var(--border-color)',
-    background: '#2a2a2a',
+    background: 'var(--bg-secondary)',
     flexWrap: 'wrap',
+    position: 'sticky',
+    top: '0',
+    zIndex: '5',
   });
 
   function ev() { return getEditorView(); }
diff --git a/frontend/js/mobile-toolbar.js b/frontend/js/mobile-toolbar.js
index 03d31e0..24ca70d 100644
--- a/frontend/js/mobile-toolbar.js
+++ b/frontend/js/mobile-toolbar.js
@@ -112,6 +112,7 @@ export function initMobileToolbar() {
   const paletteBtn = document.getElementById('mt-palette');
   const tabsBtn = document.getElementById('mt-tabs');
   const sheetClose = document.getElementById('mt-sheet-close');
+  const closeAll = document.getElementById('mt-close-all');
   const overlay = document.getElementById('mt-overlay');
 
   if (explorerBtn) explorerBtn.addEventListener('click', toggleExplorer);
@@ -119,6 +120,12 @@ export function initMobileToolbar() {
   if (paletteBtn) paletteBtn.addEventListener('click', openCommandPalette);
   if (tabsBtn) tabsBtn.addEventListener('click', openTabSwitcher);
   if (sheetClose) sheetClose.addEventListener('click', closeTabSwitcher);
+  if (closeAll) closeAll.addEventListener('click', () => {
+    const tabs = [...(TabManager._tabs || [])];
+    tabs.forEach(t => TabManager.close(t.id));
+    updateTabCount();
+    renderTabList();
+  });
   if (overlay) overlay.addEventListener('click', closeTabSwitcher);
 
   setInterval(updateTabCount, 2000);
diff --git a/frontend/js/palette.js b/frontend/js/palette.js
index 508ec70..9c33b6a 100644
--- a/frontend/js/palette.js
+++ b/frontend/js/palette.js
@@ -40,6 +40,7 @@ const CMDS = [
   { id:'create-file',  label:'📄 Créer fichier markdown', desc:'Choisir la vault, naviguer, puis nommer le fichier', cat:'Fichiers', act:()=>startBrowse('create-file') },
   { id:'delete-file',  label:'🗑️ Supprimer fichier',      desc:'Rechercher un fichier à supprimer', cat:'Fichiers', act:()=>startBrowse('delete-file') },
   { id:'delete-cur',   label:'🗑️ Supprimer fichier courant', desc:'Supprimer le fichier de l\'onglet actif', cat:'Fichiers', act:async()=>{close();await delCurFile();} },
+  { id:'close-cur',    label:'✕ Fermer fichier courant',  desc:'Fermer l\'onglet actif sans supprimer', cat:'Fichiers', act:()=>{close();const f=getCurrentFile();if(f){const tab=TabManager._tabs.find(t=>t.vault===f.vault&&t.path===f.path);if(tab)TabManager.close(tab.id);else triggerGoHome();}else{showToast('Aucun fichier ouvert','error');}} },
   { id:'create-dir',   label:'📁 Créer répertoire',       desc:'Choisir la vault, naviguer, puis nommer le dossier', cat:'Répertoires', act:()=>startBrowse('create-dir') },
   { id:'delete-dir',   label:'🗑️ Supprimer répertoire',   desc:'Choisir la vault, naviguer et supprimer', cat:'Répertoires', act:()=>startBrowse('delete-dir') },
   { id:'theme',        label:'🌓 Changer le thème',       desc:'Basculer clair/sombre',             cat:'Actions', act:()=>{close();toggleTheme();} },
diff --git a/frontend/popout.html b/frontend/popout.html
index f83dad9..bd35915 100644
--- a/frontend/popout.html
+++ b/frontend/popout.html
@@ -1180,7 +1180,8 @@ const RightSidebarManager = {
       toolbar.className = 'ai-toolbar';
       Object.assign(toolbar.style, {
         display: 'flex', alignItems: 'center', gap: '2px', padding: '4px 8px',
-        borderBottom: '1px solid var(--border-color)', background: '#2a2a2a', flexWrap: 'wrap',
+        borderBottom: '1px solid var(--border-color)', background: 'var(--bg-secondary)', flexWrap: 'wrap',
+        position: 'sticky', top: '0', zIndex: '5',
       });
 
       // AI inline complete button
diff --git a/frontend/style.css b/frontend/style.css
index a95d166..4a23dcf 100644
--- a/frontend/style.css
+++ b/frontend/style.css
@@ -6740,6 +6740,25 @@ body.popup-mode .content-area {
     justify-content: center;
   }
   .mt-sheet-close:hover { color: var(--accent); border-color: var(--accent); }
+  .mt-sheet-actions {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+  }
+  .mt-sheet-close-all {
+    padding: 5px 10px;
+    border: 1px solid var(--danger, #ef4444);
+    border-radius: 6px;
+    background: transparent;
+    color: var(--danger, #ef4444);
+    cursor: pointer;
+    font-size: 0.7rem;
+    font-weight: 600;
+    transition: background 0.15s;
+  }
+  .mt-sheet-close-all:hover {
+    background: rgba(239,68,68,0.1);
+  }
 
   .mt-sheet-list {
     flex: 1;