fix: bouton Enregistrer + Deconnexion dans Profil — style harmonieux

- config-save-btn: fond accent, texte blanc, border-radius 6px
- Bouton Deconnexion: fond danger-bg, texte danger
- Logout dans initProfile via /api/auth/logout

frontend/index.html

@@ -2043,6 +2043,7 @@
                                         <input type="text" id="profile-name" class="config-input" placeholder="Votre nom" maxlength="60">
                                     </div>
                                     <button class="config-save-btn" id="profile-save">Enregistrer</button>
+                                    <button class="config-save-btn" id="profile-logout" style="background:var(--danger-bg);color:var(--danger);border-color:var(--danger);margin-left:8px">Deconnexion</button>
                                     <span class="profile-saved" id="profile-saved" style="display:none">✓ Sauvegarde</span>
                                 </div>
                             </section>

frontend/js/config.js

@@ -1546,6 +1546,7 @@ function initProfile() {
   var langSel = document.getElementById('profile-lang');
   var nameInp = document.getElementById('profile-name');
   var saveBtn = document.getElementById('profile-save');
+  var logoutBtn = document.getElementById('profile-logout');
   var savedEl = document.getElementById('profile-saved');
   if (!langSel || !saveBtn) return;
 
@@ -1564,4 +1565,15 @@ function initProfile() {
       if (savedEl) { savedEl.style.display = 'inline'; setTimeout(function() { savedEl.style.display = 'none'; }, 2000); }
     } catch(e) {}
   });
+
+  // Logout button
+  if (logoutBtn) {
+    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(); });
+      }
+    });
+  }
 }

frontend/style.css

@@ -2228,6 +2228,13 @@ select {
 }
 .profile-hint { display: block; font-size: 0.65rem; color: var(--text-muted); margin-top: 4px; }
 .profile-saved { font-size: 0.7rem; color: var(--accent-green); margin-left: 10px; }
+.config-save-btn {
+  padding: 6px 18px; font-size: 0.75rem; font-weight: 600;
+  background: var(--accent); color: #fff;
+  border: 1px solid var(--accent); border-radius: 6px;
+  cursor: pointer; transition: opacity 0.15s;
+}
+.config-save-btn:hover { opacity: 0.85; }
 .saved-search-vault {
   font-size: 0.65rem;
   color: var(--text-muted);