refactor: relocate components to app directory structure

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

@@ -0,0 +1,19 @@
+"use client";
+/**
+ * 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" />`）。
+ */
+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>
+    </div>
+  );
+}