feat: 게임 가제 'One of the plans' UI 텍스트 적용

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

src/pages/LoginPage.jsx

@@ -31,7 +31,7 @@ export default function LoginPage() {
     <div className="login-page">
       <div className="login-panel">
         <div className="login-header">
-          <h1 className="game-title">A301</h1>
+          <h1 className="game-title">One of the plans</h1>
           <p className="game-subtitle">MULTIPLAYER</p>
         </div>