feat(assets): add initial fonts and image assets

src/app/splash/components/splash-logo.tsx

@@ -3,17 +3,24 @@
  * Splash Logo
  *
  * 原始 Dart: lib/ui/splash/widgets/splash_logo.dart
- *
- * 当前实现：纯文字 logo（"cozsweet" + tagline）。
- * 资源：`Assets.images.icLogoHome`（待替换为 `<Image src="/splash/logo.svg" />`）。
+ * 资源: /public/images/splash/ic-logo-home.png (kebab-case 重命名后)
+ *       原名: ic_logo_home.png (snake_case)
+ * 渲染: Assets.images.icLogoHome.image() → next/image <Image>
  */
+import Image from "next/image";
 import styles from "./splash-logo.module.css";
 
 export function SplashLogo() {
   return (
     <div className={styles.logo}>
-      <span className={styles.brand}>cozsweet</span>
-      <span className={styles.tagline}>Your exclusive AI boyfriend</span>
+      <Image
+        src="/images/splash/ic-logo-home.png"
+        alt="cozsweet"
+        width={120}
+        height={40}
+        priority
+        className={styles.image}
+      />
     </div>
   );
 }