feat(login): 로그인 화면에서 홈(랜딩)으로 이동 — 좌측 로고 + 우측 상단 홈으로 버튼

- 좌측 상단 MOMO DISTRIBUTION 로고를 <Link href="/"> 로 감싸 클릭 시 랜딩 이동
- 우측 폼 패널 상단에 [홈으로] 고정 버튼 추가 (모바일에서도 노출)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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

@@ -3,7 +3,7 @@
 import { useState, useEffect, FormEvent } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
-import { User, Lock, Eye, EyeOff, ArrowRight, Phone, Mail, MapPin } from "lucide-react";
+import { User, Lock, Eye, EyeOff, ArrowRight, Phone, Mail, MapPin, Home } from "lucide-react";
 import Swal from "sweetalert2";
 
 const SAVE_KEY = "momo_saved_credentials"; // localStorage 키
@@ -100,12 +100,16 @@ export default function LoginPage() {
         </div>
 
         <div className="relative z-10">
-          <div className="flex items-center gap-3">
+          <Link
+            href="/"
+            className="inline-flex items-center gap-3 hover:opacity-80 transition-opacity"
+            title="홈으로"
+          >
             <img src="/momo-icon.svg" alt="MOMO" className="w-11 h-11" />
             <span className="text-white/95 text-sm font-semibold tracking-widest">
               MOMO DISTRIBUTION
             </span>
-          </div>
+          </Link>
         </div>
 
         <div className="relative z-10 flex-1 flex flex-col justify-center py-12 lg:py-0">
@@ -136,7 +140,15 @@ export default function LoginPage() {
       </div>
 
       {/* 우측: 로그인 폼 */}
-      <div className="lg:flex-1 flex items-center justify-center px-6 py-16 lg:py-0 bg-slate-50">
+      <div className="lg:flex-1 flex items-center justify-center px-6 py-16 lg:py-0 bg-slate-50 relative">
+        {/* 홈으로 — 우측 상단 고정 */}
+        <Link
+          href="/"
+          className="absolute top-5 right-5 inline-flex items-center gap-1.5 px-3 h-9 rounded-lg bg-white border border-slate-200 text-slate-600 text-sm font-semibold hover:text-emerald-700 hover:border-emerald-300 hover:bg-emerald-50 transition shadow-sm"
+        >
+          <Home size={14} /> 홈으로
+        </Link>
+
         <div className="w-full max-w-md">
           <div className="mb-10">
             <div className="inline-flex items-center gap-2 text-emerald-700 text-xs font-bold tracking-widest mb-3">