[FEAT] 데모데이용 복원용 사진 다운로드 페이지

src/index.css

@@ -146,6 +146,76 @@
   animation: toast-out 0.1s ease-in forwards;
 }
 
+/* DEMO-DAY 애니메이션 (제거 시 이 블록 전체 삭제) */
+@keyframes demoday-fade-in {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+@keyframes demoday-slide-up {
+  from {
+    opacity: 0;
+    transform: translateY(1rem);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+@keyframes demoday-reveal {
+  from {
+    opacity: 1;
+  }
+  to {
+    opacity: 0;
+  }
+}
+
+@keyframes demoday-tint {
+  0% {
+    opacity: 0.75;
+  }
+  60% {
+    opacity: 0.3;
+  }
+  100% {
+    opacity: 0;
+  }
+}
+
+.animate-demoday-fade-in {
+  animation: demoday-fade-in 0.6s ease-out both;
+}
+
+.animate-demoday-slide-up {
+  animation: demoday-slide-up 0.5s ease-out both;
+}
+
+.animate-demoday-reveal {
+  animation: demoday-reveal 1.8s ease-out both;
+  will-change: opacity;
+}
+
+.animate-demoday-tint {
+  animation: demoday-tint 2.4s ease-out both;
+  will-change: opacity;
+}
+
+.film-strip {
+  background: linear-gradient(180deg, #1c1810 0%, #1a1712 50%, #1c1810 100%);
+  border-left: 1px solid rgba(80, 70, 50, 0.3);
+  border-right: 1px solid rgba(80, 70, 50, 0.3);
+  box-shadow:
+    inset 0 0 20px rgba(0, 0, 0, 0.5),
+    0 2px 12px rgba(0, 0, 0, 0.4);
+}
+/* DEMO-DAY 애니메이션 끝 */
+
 .bg-splash-gradient {
   background:
     radial-gradient(

src/pages/auth/KakaoCallbackPage.tsx

@@ -1,6 +1,7 @@
 import { useEffect } from "react";
 import { useNavigate, useLocation } from "react-router";
 import { useKakaoOauth } from "@/hooks/auth/login";
+import { consumeRedirectAfterLogin } from "@/pages/demoDay/redirectAfterLogin"; // DEMO-DAY
 
 export function KakaoCallbackPage() {
   const navigate = useNavigate();
@@ -32,7 +33,11 @@ export function KakaoCallbackPage() {
   //2. 신규 회원: 온보딩 화면으로 리다이렉
   //3. 실패시 login 페이지로 리다이렉
   const { isPending } = useKakaoOauth({
-    onExistingMember: () => navigate("/mainpage", { replace: true }),
+    onExistingMember: () => {
+      // DEMO-DAY: 원래는 navigate("/mainpage", { replace: true })
+      const redirect = consumeRedirectAfterLogin();
+      navigate(redirect ?? "/mainpage", { replace: true });
+    },
     onNewMember: () => navigate("/auth/onboarding", { replace: true }),
     onFail: () => navigate("/auth/login", { replace: true }),
   });

src/pages/demoDay/DemoDayPage.tsx

@@ -0,0 +1,235 @@
+import { useCallback, useEffect, useState } from "react";
+import { useNavigate } from "react-router";
+
+import Header from "@/components/common/Header";
+import { RestoraionSparkleIcon } from "@/assets/icon";
+import { useAuthStore } from "@/store/useAuth.store";
+import { useLoginModalStore } from "@/store/useLoginModal.store";
+
+import { setRedirectAfterLogin } from "./redirectAfterLogin";
+
+// ─── 데모 이미지 설정 (파일 추가 후 여기만 수정) ───
+const DEMO_IMAGES = [
+  { src: "/demo-day/restore1.jpg", label: "사진 1" },
+  { src: "/demo-day/restore2.jpg", label: "사진 2" },
+  { src: "/demo-day/restore3.jpg", label: "사진 3" },
+  { src: "/demo-day/restore4.jpg", label: "사진 4" },
+] as const;
+
+const FRAME_CODES = ["15", "16", "17", "18"];
+
+const PENDING_KEY = "finders:demoday-pending-image";
+
+export default function DemoDayPage() {
+  const navigate = useNavigate();
+  const user = useAuthStore((s) => s.user);
+  const openLoginModal = useLoginModalStore((s) => s.openLoginModal);
+
+  // ─── 로그인 후 자동 복원 진행 ───
+  useEffect(() => {
+    const pendingRaw = sessionStorage.getItem(PENDING_KEY);
+    if (!pendingRaw) return;
+    if (!user) return;
+
+    sessionStorage.removeItem(PENDING_KEY);
+    const index = Number(pendingRaw);
+    const image = DEMO_IMAGES[index];
+    if (!image) return;
+
+    navigate("/restore/editor", {
+      state: { imageUrl: image.src },
+    });
+  }, [user, navigate]);
+
+  const handleRestore = useCallback(
+    (index: number) => {
+      const image = DEMO_IMAGES[index];
+      if (!image) return;
+
+      const isAuthed = Boolean(user && user.memberId > 0);
+
+      if (isAuthed) {
+        navigate("/restore/editor", {
+          state: { imageUrl: image.src },
+        });
+      } else {
+        sessionStorage.setItem(PENDING_KEY, String(index));
+        setRedirectAfterLogin("/demo-day");
+        openLoginModal();
+      }
+    },
+    [user, navigate, openLoginModal],
+  );
+
+  return (
+    <div className="relative flex w-full flex-col bg-neutral-900">
+      {/* 히어로 그라데이션 */}
+      <div className="pointer-events-none absolute -inset-x-4 top-0 z-0 h-80 bg-[radial-gradient(ellipse_at_15%_55%,rgba(233,78,22,0.18)_0%,transparent_55%)] sm:-inset-x-6 lg:-inset-x-8" />
+
+      <Header title="파인더스 데모데이" showBack={false} />
+
+      <div className="scrollbar-hide relative z-10 flex-1 overflow-y-auto">
+        {/* 히어로 영역 */}
+        <section className="animate-demoday-fade-in relative px-2 pt-4 pb-5">
+          <div className="relative">
+            <h2 className="text-[1.5rem] leading-tight font-bold text-neutral-100">
+              <span className="animate-demoday-slide-up inline-block">
+                타버린 사진도
+              </span>
+              <br />
+              <span className="animate-demoday-slide-up inline-block [animation-delay:0.1s]">
+                AI로 다시
+              </span>{" "}
+              <span className="animate-demoday-slide-up inline-block text-orange-500 [animation-delay:0.15s]">
+                살려보세요
+              </span>
+            </h2>
+            <p className="animate-demoday-fade-in mt-2 text-[0.875rem] text-neutral-400 [animation-delay:0.3s]">
+              사진을 꾹 눌러 저장하고, 복원해 보세요
+            </p>
+          </div>
+        </section>
+
+        {/* 필름 스트립 */}
+        <div className="relative mx-1 mb-10">
+          {/* 필름 베이스 — 양쪽 스프로킷 레일 포함 */}
+          <div className="film-strip animate-demoday-fade-in rounded-sm">
+            {DEMO_IMAGES.map((image, index) => (
+              <FilmFrame
+                key={image.src}
+                image={image}
+                index={index}
+                frameCode={FRAME_CODES[index]}
+                onRestore={() => handleRestore(index)}
+              />
+            ))}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+// ─── 양쪽 스프로킷 홀 ───
+function SprocketRail({ count }: { count: number }) {
+  return (
+    <>
+      {Array.from({ length: count }, (_, i) => (
+        <div
+          key={i}
+          className="h-[0.625rem] w-[0.375rem] rounded-[1px] bg-neutral-900"
+          style={{
+            boxShadow: "inset 0 1px 2px rgba(0,0,0,0.6)",
+          }}
+        />
+      ))}
+    </>
+  );
+}
+
+// ─── 필름 프레임 ───
+
+interface FilmFrameProps {
+  image: (typeof DEMO_IMAGES)[number];
+  index: number;
+  frameCode: string | undefined;
+  onRestore: () => void;
+}
+
+function FilmFrame({ image, index, frameCode, onRestore }: FilmFrameProps) {
+  const [imgError, setImgError] = useState(false);
+  const developDelay = 0.4 + index * 0.8;
+  const ctaDelay = developDelay + 1.6;
+
+  return (
+    <div>
+      {/* 프레임 한 줄: 좌 스프로킷 | 이미지 | 우 스프로킷 */}
+      <div className="flex">
+        {/* 좌측 스프로킷 레일 */}
+        <div className="flex w-5 shrink-0 flex-col items-center justify-evenly">
+          <SprocketRail count={6} />
+        </div>
+
+        {/* 이미지 + 프레임 정보 */}
+        <div className="min-w-0 flex-1 py-1.5">
+          {/* 사진 */}
+          <div className="relative overflow-hidden bg-[#15120a]">
+            {imgError ? (
+              <div className="bg-neutral-850 flex aspect-[3/2] items-center justify-center text-sm text-neutral-600">
+                이미지 준비 중
+              </div>
+            ) : (
+              <>
+                <img
+                  src={image.src}
+                  alt={image.label}
+                  onError={() => setImgError(true)}
+                  className="aspect-[3/2] w-full object-cover"
+                  style={{
+                    WebkitTouchCallout: "default",
+                    WebkitUserSelect: "auto",
+                    userSelect: "auto",
+                  }}
+                />
+                {/* 현상 오버레이 — 세피아 톤 */}
+                <div
+                  className="animate-demoday-tint pointer-events-none absolute inset-0"
+                  style={{
+                    animationDelay: `${developDelay}s`,
+                    backgroundColor: "#3a1800",
+                  }}
+                />
+                {/* 현상 오버레이 — 암흑 */}
+                <div
+                  className="animate-demoday-reveal pointer-events-none absolute inset-0 bg-black"
+                  style={{ animationDelay: `${developDelay}s` }}
+                />
+              </>
+            )}
+            {/* 힌트 */}
+            <div
+              className="animate-demoday-fade-in pointer-events-none absolute inset-x-0 bottom-0 flex items-end justify-end bg-gradient-to-t from-black/40 to-transparent p-2 opacity-0"
+              style={{ animationDelay: `${developDelay + 1.5}s` }}
+            >
+              <span className="text-[0.625rem] text-white/50">
+                꾹 눌러서 저장
+              </span>
+            </div>
+          </div>
+
+          {/* 프레임 정보 (필름 리베이트 영역) */}
+          <div className="flex items-center justify-between px-0.5 pt-1.5 pb-0.5">
+            <div className="flex items-center gap-1.5">
+              <span className="font-mono text-[0.625rem] font-bold text-orange-400/60">
+                {frameCode}
+              </span>
+              <span className="text-[0.5rem] text-orange-400/30">{"▶ "}</span>
+              <span className="font-mono text-[0.5rem] tracking-[0.15em] text-orange-400/30">
+                FINDERS 400
+              </span>
+            </div>
+            <span className="font-mono text-[0.5rem] tracking-wider text-orange-400/30">
+              {frameCode}A
+            </span>
+          </div>
+
+          {/* 복원하러 가기 CTA */}
+          <button
+            type="button"
+            onClick={onRestore}
+            className="animate-demoday-fade-in mt-1 flex w-full items-center justify-center gap-1.5 rounded-lg bg-orange-500 py-2.5 text-[0.8125rem] font-semibold text-white opacity-0 transition-all active:scale-[0.98] active:brightness-90"
+            style={{ animationDelay: `${ctaDelay}s` }}
+          >
+            <RestoraionSparkleIcon className="h-4 w-4" strokeWidth={0} />
+            복원하러 가기
+          </button>
+        </div>
+
+        {/* 우측 스프로킷 레일 */}
+        <div className="flex w-5 shrink-0 flex-col items-center justify-evenly">
+          <SprocketRail count={6} />
+        </div>
+      </div>
+    </div>
+  );
+}

src/pages/demoDay/redirectAfterLogin.ts

@@ -0,0 +1,24 @@
+const REDIRECT_KEY = "finders:redirectAfterLogin";
+
+type RedirectData = { path: string; timestamp: number };
+
+export function setRedirectAfterLogin(path: string): void {
+  sessionStorage.setItem(
+    REDIRECT_KEY,
+    JSON.stringify({ path, timestamp: Date.now() }),
+  );
+}
+
+export function consumeRedirectAfterLogin(): string | null {
+  const raw = sessionStorage.getItem(REDIRECT_KEY);
+  sessionStorage.removeItem(REDIRECT_KEY);
+  if (!raw) return null;
+  try {
+    const data: RedirectData = JSON.parse(raw);
+    const TTL = 30 * 60 * 1000; // 30분
+    if (Date.now() - data.timestamp > TTL) return null;
+    return data.path;
+  } catch {
+    return null;
+  }
+}

src/router/Router.tsx

@@ -20,6 +20,7 @@ import DevelopmentHistoryPage from "@/pages/developmentHistory/DevelopmentHistor
 import FilmCameraGuideDetailPage from "@/pages/filmCameraGuide/FilmCameraGuideDetailPage";
 import FilmCameraGuidePage from "@/pages/filmCameraGuide/FilmCameraGuidePage";
 import PhotoRestorationPage from "@/pages/photoRestoration/PhotoRestorationPage";
+import DemoDayPage from "@/pages/demoDay/DemoDayPage"; // DEMO-DAY
 
 // 현상관리 페이지
 import { DetailInfoPage } from "@/pages/photoManage/DetailInfoPage";
@@ -86,6 +87,7 @@ const guideRoutes = [
   { path: "film-camera-guide", Component: FilmCameraGuidePage },
   { path: "film-camera-guide/:id", Component: FilmCameraGuideDetailPage },
   { path: "restore/editor", Component: PhotoRestorationPage },
+  { path: "demo-day", Component: DemoDayPage }, // DEMO-DAY
 ];
 
 const photoFeedStandaloneRoutes = [