chore: update describtion of front-end in readme (#113)

## Summary by Sourcery

Update README documentation to reflect the current React-based frontend
stack and simplify dependency installation steps.

Documentation:
- Update English and Chinese READMEs to describe the frontend as built
with React 19, Shadcn UI, and Tailwind CSS 4 instead of Svelte 5.
- Simplify setup instructions in both READMEs by generalizing the
dependency installation step without changing into a separate UI
directory.

2 files changed, 6 insertions, 10 deletions

diff --git a/README.CN.md b/README.CN.md
index a740055..c6f64a0 100644
--- a/README.CN.md
+++ b/README.CN.md
@@ -14,7 +14,7 @@
 DropOut 是一个现代的、可复现的、开发者级别的 Minecraft 启动器。
 它不仅仅是为了启动 Minecraft 而设计的，而是将 Minecraft 环境作为确定性的、版本化的工作空间进行管理。
 
-DropOut 使用 Tauri v2 构建，DropOut 提供原生性能和最小资源使用，并配有现代响应式 Web UI。
+DropOut 使用 Tauri v2 构建，DropOut 提供原生性能和最小资源使用，并配有现代响应式 Web UI（基于 React 19、shadcn/ui 和 Tailwind CSS 4 构建）。
 
 > Minecraft 环境是一个复杂的系统。
 > DropOut 将它们视为软件项目。
@@ -42,7 +42,7 @@ DropOut 专注于保持你的游戏稳定、可调试和可重现。
 ## 功能特性
 
 - **高性能**：使用 Rust 和 Tauri 构建，实现最小资源使用和快速启动时间。
-- **现代工业 UI**：使用 **React** 和 **Tailwind CSS 4** 设计的干净、无干扰界面。
+- **现代工业 UI**：使用 **React 19**、**shadcn/ui** 和 **Tailwind CSS 4** 设计的干净、无干扰界面。
 - **Microsoft 认证**：通过官方 Xbox Live 和 Microsoft OAuth 流程（设备代码流程）提供安全登录支持。
 - **模组加载器支持**：
   - **Fabric**：内置安装程序和版本管理。
@@ -101,12 +101,10 @@ DropOut 专注于保持你的游戏稳定、可调试和可重现。
    cd DropOut
    ```
 
-1. **安装前端依赖**
+2. **安装依赖**
 
    ```bash
-   cd ui
    pnpm install
-   cd ..
    ```
 
 1. **运行开发模式**
diff --git a/README.md b/README.md
index 4a0172a..de4e26c 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ English | [中文](README.CN.md)
 DropOut is a modern, reproducible, and developer-grade Minecraft launcher.
 It is designed not just to launch Minecraft, but to manage Minecraft environments as deterministic, versioned workspaces.
 
-Built with Tauri v2 and Rust, DropOut delivers native performance and minimal resource usage, paired with a modern reactive web UI.
+Built with Tauri v2, DropOut delivers native performance and minimal resource usage, paired with a modern reactive web UI built with React 19, shadcn/ui, and Tailwind CSS 4.
 
 > Minecraft environments are complex systems.
 > DropOut treats them like software projects.
@@ -42,7 +42,7 @@ This launcher is built for players who value control, transparency, and long-ter
 ## Features
 
 - **High Performance**: Built with Rust and Tauri for minimal resource usage and fast startup times.
-- **Modern Industrial UI**: A clean, distraction-free interface designed with **React** and **Tailwind CSS 4**.
+- **Modern Industrial UI**: A clean, distraction-free interface designed with **React 19**, **shadcn/ui**, and **Tailwind CSS 4**.
 - **Microsoft Authentication**: Secure login support via official Xbox Live & Microsoft OAuth flows (Device Code Flow).
 - **Mod Loader Support**:
   - **Fabric**: Built-in installer and version management.
@@ -103,12 +103,10 @@ Download the latest release for your platform from the [Releases](https://github
    cd DropOut
    ```
 
-1. **Install Frontend Dependencies**
+2. **Install Dependencies**
 
    ```bash
-   cd ui
    pnpm install
-   cd ..
    ```
 
 1. **Run in Development Mode**