Auth: idUsuario login via sige_sam_v3.usuario

- Login uses idUsuario + password (plain text or SHA256)
- API types: HelpDeskUser with idUsuario, nombres, apPaterno
- Sidebar/layout: fullName from nombres + apPaterno
- pnpm-workspace.yaml: approve unrs-resolver builds

frontend/src/app/(auth)/login/page.tsx

@@ -5,7 +5,7 @@ import { useRouter } from "next/navigation";
 import { useAuth } from "@/lib/auth";
 
 export default function LoginPage() {
-  const [rut, setRut] = useState("");
+  const [idUsuario, setIdUsuario] = useState("");
   const [password, setPassword] = useState("");
   const [error, setError] = useState("");
   const [loading, setLoading] = useState(false);
@@ -17,7 +17,7 @@ export default function LoginPage() {
     setError("");
     setLoading(true);
     try {
-      await login(rut, password);
+      await login(idUsuario, password);
       router.push("/");
     } catch (err: any) {
       setError(err.message || "Credenciales inválidas");
@@ -74,13 +74,13 @@ export default function LoginPage() {
 
           <form onSubmit={handleSubmit}>
             <div className="mb-3">
-              <label className="form-label">RUT</label>
+              <label className="form-label">Usuario</label>
               <input
                 type="text"
                 className="form-control"
-                placeholder="12.345.678-9"
-                value={rut}
-                onChange={(e) => setRut(e.target.value)}
+                placeholder="Tu ID de usuario"
+                value={idUsuario}
+                onChange={(e) => setIdUsuario(e.target.value)}
                 required
                 autoFocus
               />