Initial frontend repository commit.

Include app source and update .gitignore to exclude local release artifacts and signing files.

Made-with: Cursor

src/screens/home/index.ts

@@ -0,0 +1,7 @@
+/**
+ * 首页模块导出
+ */
+
+export { HomeScreen } from './HomeScreen';
+export { PostDetailScreen } from './PostDetailScreen';
+export { SearchScreen } from './SearchScreen';