white-label: brand de la clinica por configuracion (fase 1 de instancia sin branding SKEEN)

- backend: GET/PUT /skeen/frontend/v1/brand leyendo ir.config_parameter
  skeen.clinic.brand (JSON: nombre, logo_claro, logo_oscuro, pie) con
  defaults SKEEN; GET publico (el login lo necesita sin sesion), PUT admin
  con auditoria. frontend_users.xml: 'Administrador SKEEN' -> 'Administrador'
- frontend: ClinicBrand + BRAND_DEFAULT en odoo.ts; brand y setBrand en el
  contexto de auth (fetch al boot + cache localStorage + document.title)
- Login/layouts/mensajes/exports leen el brand en vez de strings SKEEN:
  Login.tsx, SkeenLayout, HomeNestLayout, Cumpleanos (wa + export),
  Pacientes/Ventas/Cortes/Reportes/Kpis/Alertas/AgendaPrint (titulos),
  useClinicaPrint (fallback nombre), Login hace GET publico al montar
- Configuracion > Clinica: tarjeta 'Identidad de la clinica' (solo admin)
  para editar nombre/pie/logos con preview
- no renombrado (invisible al usuario): rutas API /skeen/*, claves
  localStorage, nombres de modulos, parametros skeen.*

Verificacion API: 11/11 tests OK (defaults, PUT merge, campo invalido
ignorado, restore, admin neutral). Deploy: build + rsync + Odoo reiniciado

frontend/src/components/HomeNestLayout.tsx

@@ -53,8 +53,6 @@ interface LayoutProps {
   subtitle?: string;
 }
 
-const LOGO_HOMENEST = '/skeen-brand/logos/Logo%20Completo%20Negro.png';
-
 const topNavItems = [
   { label: 'Dashboard', icon: LayoutDashboard, href: '/' },
   { label: 'Agenda', icon: Calendar, href: '/agenda' },
@@ -114,7 +112,7 @@ const menuSections = [
 export const HomeNestLayout: FC<LayoutProps> = ({ children, title: _title, subtitle: _subtitle }) => {
   const location = useLocation();
   const navigate = useNavigate();
-  const { user, canSee, hasRole, logout } = useAuth();
+  const { user, canSee, hasRole, logout, brand } = useAuth();
   const [menuOpen, setMenuOpen] = useState(false);
   const [expanded, setExpanded] = useState<string[]>(['Clínica']);
   const chatUnread = useChatUnread();
@@ -239,7 +237,7 @@ export const HomeNestLayout: FC<LayoutProps> = ({ children, title: _title, subti
                 <Menu size={22} />
               </Button>
               <Link to="/" className="flex items-center gap-2">
-                <img src={LOGO_HOMENEST} alt="SKEEN" className="h-8 w-auto object-contain" />
+                <img src={brand.logo_oscuro} alt={brand.nombre} className="h-8 w-auto object-contain" />
               </Link>
             </div>
 
@@ -515,7 +513,7 @@ export const HomeNestLayout: FC<LayoutProps> = ({ children, title: _title, subti
           <div className="fixed inset-0 z-40 lg:hidden" style={{ backgroundColor: 'rgba(62,44,28,0.4)' }} onClick={() => setMenuOpen(false)} aria-hidden="true" />
           <aside className="fixed inset-y-0 left-0 w-80 z-50 flex flex-col overflow-y-auto lg:hidden" style={{ backgroundColor: 'var(--surface)' }}>
             <div className="flex items-center justify-between px-5 h-16 border-b" style={{ borderColor: 'var(--border)' }}>
-              <img src={LOGO_HOMENEST} alt="SKEEN" className="h-8 w-auto object-contain" />
+              <img src={brand.logo_oscuro} alt={brand.nombre} className="h-8 w-auto object-contain" />
               <Button variant="ghost" size="sm" onClick={() => setMenuOpen(false)} aria-label="Cerrar menú">
                 <X size={22} />
               </Button>