打包 Android 和 iOS App 壳

[yeyixiang2007]

What to build

Ship a native mobile app wrapper that reuses the existing web experience for the core product flows on Android and iOS.
This slice should preserve the current backend-backed product behavior while minimizing code changes in the frontend application itself.

Acceptance criteria

• The app can be built and launched on Android.
• The app can be built and launched on iOS.
• Core web flows render and operate correctly inside the native wrapper.

Blocked by

• 确定多端技术路线 #233
• 提取共享 API 和类型层 #234