feat(chat): botón cerrar sesión en el header del chat

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Livewire/Chat/PublicChat.php

@@ -137,6 +137,27 @@ class PublicChat extends Component
         $this->paso            = 'email';
     }
 
+    public function cerrarSesion(): void
+    {
+        $this->email            = '';
+        $this->nombreRegistro   = '';
+        $this->cedulaRegistro   = '';
+        $this->celularRegistro  = '';
+        $this->codigoIngresado  = '';
+        $this->emailMascarado   = null;
+        $this->contactIdPending = null;
+        $this->userId           = null;
+        $this->nombreUsuario    = null;
+        $this->saldoUsuario     = null;
+        $this->convId           = null;
+        $this->estadoConv       = 'bot';
+        $this->flujo            = '';
+        $this->flujoData        = [];
+        $this->mensajes         = [];
+        $this->input            = '';
+        $this->paso             = 'email';
+    }
+
     // ─────────────────────────────────────────────────────────
     // Paso 2b: verificar código OTP
     // ─────────────────────────────────────────────────────────

resources/views/livewire/chat/public-chat.blade.php

@@ -188,6 +188,13 @@
                             <p class="text-white text-sm font-bold">${{ number_format($saldoUsuario) }}</p>
                         </div>
                     @endif
+                    {{-- Cerrar sesión --}}
+                    <button wire:click="cerrarSesion" title="Cerrar sesión"
+                            class="flex-shrink-0 ml-1 p-2 rounded-full hover:bg-white/10 transition text-[#8696a0] hover:text-red-400">
+                        <svg class="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke-width="1.8" stroke="currentColor">
+                            <path stroke-linecap="round" stroke-linejoin="round" d="M15.75 9V5.25A2.25 2.25 0 0 0 13.5 3h-6a2.25 2.25 0 0 0-2.25 2.25v13.5A2.25 2.25 0 0 0 7.5 21h6a2.25 2.25 0 0 0 2.25-2.25V15M12 9l-3 3m0 0 3 3m-3-3h12.75" />
+                        </svg>
+                    </button>
                 </div>
             </div>