diff --git a/frontend/js/ai.js b/frontend/js/ai.js
index 6d763e9..98bc72a 100644
--- a/frontend/js/ai.js
+++ b/frontend/js/ai.js
@@ -96,6 +96,8 @@ function createMenu(items, parentEl) {
       fontSize: '0.8rem',
       color: 'var(--text-primary)',
       whiteSpace: 'nowrap',
+      background: 'transparent',
+      transition: 'background 0.1s',
     });
     el.innerHTML = item.label;
     if (item.hint) {
@@ -230,35 +232,41 @@ export async function createAIToolbar(container, getEditorView) {
     padding: '3px 8px',
     borderRadius: '4px',
   });
-  aiBtn.title = 'AI Inline Completion (Ctrl+J)';
+  aiBtn.title = 'AI Inline Completion (Ctrl+J) — Complète le texte automatiquement';
   aiBtn.addEventListener('click', async () => {
     const v = ev();
     if (!v) return;
     const text = getSelection(v);
     if (!text.trim()) return;
+    const origHTML = aiBtn.innerHTML;
+    aiBtn.innerHTML = '⏳ AI...';
+    aiBtn.disabled = true;
     try {
       const result = await aiAction('inline-complete', text);
       replaceSelection(v, result, 'append');
       showToast('AI: complétion ajoutée', 'success');
     } catch (e) {
       showToast('AI: ' + (String(e.message || e).includes('401') ? 'clé API invalide' : e.message), 'error');
+    } finally {
+      aiBtn.innerHTML = origHTML;
+      aiBtn.disabled = false;
     }
   });
 
   // ── Edit menu ──
   const editBtn = createDropdownBtn('Éditer', [
-    { label: '🪄 Improve writing', action: () => action('improve') },
-    { label: '🔤 Fix spelling & grammar', action: () => action('fix-spelling') },
-    { label: '📏 Make shorter', action: () => action('make-shorter') },
-    { label: '📐 Make longer', action: () => action('make-longer') },
-    { label: '📋 Simplify language', action: () => action('simplify') },
-  ]);
+    { label: '🪄 Improve writing', action: () => action('improve'), hint: 'Améliore la qualité du texte' },
+    { label: '🔤 Fix spelling & grammar', action: () => action('fix-spelling'), hint: 'Corrige les fautes' },
+    { label: '📏 Make shorter', action: () => action('make-shorter'), hint: 'Rend le texte plus concis' },
+    { label: '📐 Make longer', action: () => action('make-longer'), hint: 'Ajoute des détails' },
+    { label: '📋 Simplify language', action: () => action('simplify'), hint: 'Simplifie le langage' },
+  ], 'Modifie le texte sélectionné');
 
   // ── Tone menu ──
   const toneBtn = createDropdownBtn('Ton', [
     { label: '💼 Professional tone', action: () => action('tone', { tone: 'professional' }) },
     { label: '💬 Casual tone', action: () => action('tone', { tone: 'casual' }) },
-  ]);
+  ], 'Change le ton du texte');
 
   // ── Translate menu ──
   const translateBtn = createDropdownBtn('Traduire', [
@@ -268,22 +276,23 @@ export async function createAIToolbar(container, getEditorView) {
     { label: '🇩🇪 German', action: () => action('translate', { target_lang: 'German' }) },
     { label: '🇫🇷 French', action: () => action('translate', { target_lang: 'French' }) },
     { label: '🇪🇸 Spanish', action: () => action('translate', { target_lang: 'Spanish' }) },
-  ]);
+  ], 'Traduit le texte sélectionné');
 
   // ── Generate menu ──
   const genBtn = createDropdownBtn('Générer', [
     { label: 'ℹ️ Explain this', action: () => action('explain', {}, 'append') },
     { label: '📝 Summarize', action: () => action('summarize', {}, 'append') },
     { label: '✏️ Continue writing', action: () => action('continue', {}, 'append') },
-  ]);
+  ], 'Génère du contenu à partir de la sélection');
 
   // ── Custom Rewrite ──
   const rewriteBtn = document.createElement('button');
   rewriteBtn.className = 'ai-toolbar-btn';
   rewriteBtn.innerHTML = '💬 Réécrire';
+  rewriteBtn.title = 'Réécrit le texte selon vos instructions';
   Object.assign(rewriteBtn.style, {
     fontSize: '0.7rem',
-    background: 'none',
+    background: 'transparent',
     border: 'none',
     cursor: 'pointer',
     padding: '3px 6px',
@@ -311,7 +320,7 @@ export async function createAIToolbar(container, getEditorView) {
     { label: '📊 Convert to table', action: () => action('to-table') },
     { label: '⚙️ Generate frontmatter', action: () => action('frontmatter', {}, 'before') },
     { label: '🔷 Convert to canvas', action: () => action('to-canvas', {}, 'append') },
-  ]);
+  ], 'Outils de conversion');
 
   toolbar.appendChild(aiBtn);
   toolbar.appendChild(createSeparator());
@@ -363,10 +372,11 @@ export async function createAIToolbar(container, getEditorView) {
   return toolbar;
 }
 
-function createDropdownBtn(text, items) {
+function createDropdownBtn(text, items, tooltip = '') {
   const btn = document.createElement('button');
   btn.className = 'ai-toolbar-btn';
   btn.innerHTML = text + ' ▾';
+  btn.title = tooltip || text;
   Object.assign(btn.style, {
     position: 'relative',
     fontSize: '0.7rem',
diff --git a/frontend/js/utils.js b/frontend/js/utils.js
index 22d835c..76a8c48 100644
--- a/frontend/js/utils.js
+++ b/frontend/js/utils.js
@@ -319,7 +319,7 @@ async function openEditor(vaultName, filePath) {
       EditorView.updateListener.of((update) => {
         if (update.docChanged) {
           clearTimeout(window._obsigateAutoSaveTimer);
-          window._obsigateAutoSaveTimer = setTimeout(() => saveFile(), 2000);
+          window._obsigateAutoSaveTimer = setTimeout(() => saveFile(true), 2000);
         }
       }),
     ];
@@ -417,17 +417,19 @@ function closeEditor() {
   state.editorPath = null;
 }
 
-async function saveFile() {
+async function saveFile(silent = false) {
   if ((!state.editorView && !state.fallbackEditorEl) || !state.editorVault || !state.editorPath) return;
 
   const content = state.editorView ? state.editorView.state.doc.toString() : state.fallbackEditorEl.value;
   const saveBtn = document.getElementById("editor-save");
-  const originalHTML = saveBtn.innerHTML;
+  const originalHTML = saveBtn ? saveBtn.innerHTML : '';
 
   try {
-    saveBtn.disabled = true;
-    saveBtn.innerHTML = '<i data-lucide="loader" style="width:16px;height:16px"></i>';
-    safeCreateIcons();
+    if (saveBtn && !silent) {
+      saveBtn.disabled = true;
+      saveBtn.innerHTML = '<i data-lucide="loader" style="width:16px;height:16px"></i>';
+      safeCreateIcons();
+    }
 
     const response = await fetch(`/api/file/${encodeURIComponent(state.editorVault)}/save?path=${encodeURIComponent(state.editorPath)}`, {
       method: "PUT",
@@ -440,17 +442,28 @@ async function saveFile() {
       throw new Error(error.detail || "Erreur de sauvegarde");
     }
 
-    saveBtn.innerHTML = '<i data-lucide="check" style="width:16px;height:16px"></i>';
-    safeCreateIcons();
-
-    const _savedVault = state.editorVault;
-    const _savedPath = state.editorPath;
-    setTimeout(() => {
-      closeEditor();
-      if (state.currentVault === _savedVault && state.currentPath === _savedPath) {
-        openFile(_savedVault, _savedPath);
+    if (silent) {
+      // Auto-save: brief visual feedback
+      if (saveBtn) {
+        saveBtn.innerHTML = '<i data-lucide="check" style="width:16px;height:16px"></i>';
+        safeCreateIcons();
+        setTimeout(() => {
+          if (saveBtn) saveBtn.innerHTML = originalHTML;
+        }, 1500);
       }
-    }, 800);
+    } else {
+      saveBtn.innerHTML = '<i data-lucide="check" style="width:16px;height:16px"></i>';
+      safeCreateIcons();
+
+      const _savedVault = state.editorVault;
+      const _savedPath = state.editorPath;
+      setTimeout(() => {
+        closeEditor();
+        if (state.currentVault === _savedVault && state.currentPath === _savedPath) {
+          openFile(_savedVault, _savedPath);
+        }
+      }, 800);
+    }
   } catch (err) {
     console.error("Save error:", err);
     alert(`Erreur: ${err.message}`);