feat: add global user administration for admin users

Backend:
- Add getAllUsuarios() to get users from all tenants
- Add updateUsuarioGlobal() to edit users and change their tenant
- Add deleteUsuarioGlobal() for global user deletion
- Add global admin check based on tenant RFC
- Add new API routes: /usuarios/global/*

Frontend:
- Add UserListItem.tenantId and tenantName fields
- Add /admin/usuarios page with full user management
- Support filtering by tenant and search
- Inline editing for name, role, and tenant assignment
- Group users by company for better organization
- Add "Admin Usuarios" menu item for admin navigation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/lib/hooks/use-usuarios.ts

@@ -38,3 +38,31 @@ export function useDeleteUsuario() {
     },
   });
 }
+
+// Hooks globales (admin global)
+export function useAllUsuarios() {
+  return useQuery({
+    queryKey: ['usuarios', 'global'],
+    queryFn: usuariosApi.getAllUsuarios,
+  });
+}
+
+export function useUpdateUsuarioGlobal() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UserUpdate }) => usuariosApi.updateUsuarioGlobal(id, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['usuarios'] });
+    },
+  });
+}
+
+export function useDeleteUsuarioGlobal() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => usuariosApi.deleteUsuarioGlobal(id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['usuarios'] });
+    },
+  });
+}