feat: Profil + Deconnexion dans le menu header (⚙️)

- Profil: ouvre Config → scroll vers section Profil (langue, nom)
- Deconnexion: logout via /api/auth/logout, visible si auth activee
- Redemarrage: window.location.reload apres logout

frontend/index.html

@@ -633,6 +633,56 @@
                                         >
                                     </span>
                                 </button>
+                                <button
+                                    class="menu-list-row menu-list-button"
+                                    id="profile-open-btn"
+                                    type="button"
+                                    role="menuitem"
+                                >
+                                    <span
+                                        class="menu-list-icon"
+                                        aria-hidden="true"
+                                    >
+                                        <i
+                                            data-lucide="user"
+                                            style="width: 17px; height: 17px"
+                                        ></i>
+                                    </span>
+                                    <span class="menu-list-content">
+                                        <span class="menu-list-title"
+                                            >Profil</span
+                                        >
+                                        <span class="menu-list-subtitle"
+                                            >Langue &amp; preferences</span
+                                        >
+                                    </span>
+                                </button>
+                                <button
+                                    class="menu-list-row menu-list-button"
+                                    id="logout-btn"
+                                    type="button"
+                                    role="menuitem"
+                                    style="display:none"
+                                >
+                                    <span
+                                        class="menu-list-icon"
+                                        aria-hidden="true"
+                                    >
+                                        <i
+                                            data-lucide="log-out"
+                                            style="width: 17px; height: 17px; color: var(--danger)"
+                                        ></i>
+                                    </span>
+                                    <span class="menu-list-content">
+                                        <span class="menu-list-title"
+                                            style="color:var(--danger)"
+                                            >Deconnexion</span
+                                        >
+                                        <span class="menu-list-subtitle"
+                                            >Quitter la session</span
+                                        >
+                                    </span>
+                                </button>
                             </div>
                         </div>
                     </div>

frontend/js/config.js

@@ -617,6 +617,33 @@ function initConfigModal() {
   // Load existing keys on modal open
   document.getElementById("config-open-btn").addEventListener("click", loadAIKeys);
 
+  // Profile menu button: open config modal and scroll to profile section
+  var profileBtn = document.getElementById("profile-open-btn");
+  if (profileBtn) {
+    profileBtn.addEventListener("click", function() {
+      openConfigModal();
+      setTimeout(function() {
+        var el = document.getElementById("cfg-profile");
+        if (el) el.scrollIntoView({ behavior: 'smooth' });
+      }, 300);
+    });
+  }
+
+  // Logout button
+  var logoutBtn = document.getElementById("logout-btn");
+  if (logoutBtn && AuthManager && AuthManager._authEnabled) {
+    // Show if user is logged in
+    var user = AuthManager.getCurrentUser();
+    if (user) logoutBtn.style.display = '';
+    logoutBtn.addEventListener("click", function() {
+      if (confirm("Voulez-vous vraiment vous deconnecter ?")) {
+        fetch("/api/auth/logout", { method: "POST" })
+          .then(function() { window.location.reload(); })
+          .catch(function() { window.location.reload(); });
+      }
+    });
+  }
+
   // Config nav search
   var cfgSearch = document.getElementById("config-nav-search");
   if (cfgSearch) {