feat: add strategy list page

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

frontend/src/app/strategy/page.tsx

@@ -0,0 +1,90 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { useRouter } from 'next/navigation';
+import Link from 'next/link';
+import Sidebar from '@/components/layout/Sidebar';
+import Header from '@/components/layout/Header';
+import { api } from '@/lib/api';
+
+interface User {
+  id: number;
+  username: string;
+}
+
+const strategies = [
+  {
+    id: 'multi-factor',
+    name: '멀티 팩터',
+    description: '밸류, 퀄리티, 모멘텀 팩터를 조합한 종합 전략',
+    icon: '📊',
+  },
+  {
+    id: 'quality',
+    name: '슈퍼 퀄리티',
+    description: 'F-Score 기반 우량주 선별 전략',
+    icon: '⭐',
+  },
+  {
+    id: 'value-momentum',
+    name: '밸류 모멘텀',
+    description: '가치주와 모멘텀을 결합한 전략',
+    icon: '📈',
+  },
+];
+
+export default function StrategyListPage() {
+  const router = useRouter();
+  const [user, setUser] = useState<User | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    const init = async () => {
+      try {
+        const userData = await api.getCurrentUser() as User;
+        setUser(userData);
+      } catch {
+        router.push('/login');
+      } finally {
+        setLoading(false);
+      }
+    };
+    init();
+  }, [router]);
+
+  if (loading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center">
+        <div className="text-gray-500">Loading...</div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex min-h-screen">
+      <Sidebar />
+      <div className="flex-1">
+        <Header username={user?.username} />
+        <main className="p-6">
+          <h1 className="text-2xl font-bold text-gray-800 mb-6">퀀트 전략</h1>
+
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+            {strategies.map((strategy) => (
+              <Link
+                key={strategy.id}
+                href={`/strategy/${strategy.id}`}
+                className="bg-white rounded-lg shadow p-6 hover:shadow-lg transition-shadow"
+              >
+                <div className="text-4xl mb-4">{strategy.icon}</div>
+                <h2 className="text-lg font-semibold text-gray-800 mb-2">
+                  {strategy.name}
+                </h2>
+                <p className="text-sm text-gray-500">{strategy.description}</p>
+              </Link>
+            ))}
+          </div>
+        </main>
+      </div>
+    </div>
+  );
+}