docs: add quick start guides to both english and chinese readmes

Add step-by-step quick start instructions including installation, workspace initialization, host startup, and artifact creation notes for both README.md and README.zh-CN.md

Author: Sayhi-bzb

README.md

@@ -76,6 +76,33 @@ Canvas prompt routing uses artifact metadata, block ids, optional implementation
 - Local reuse: Canvas makes the nearest correct primitive, hook, helper, schema, fixture, or asset easier to find.
 - Guarded boundaries: artifact source stays separate from host internals, old runtime surfaces, generated bundles, and privileged APIs.
 
+## Quick Start
+
+Install the npm package:
+
+```bash
+npm install agent-html
+```
+
+Create a local Canvas workspace:
+
+```bash
+npx agent-html init
+```
+
+Start the Canvas host:
+
+```bash
+npx agent-html dev
+```
+
+Then ask your agent to build or revise a React artifact in `agent-html/artifacts`:
+
+```text
+Build a dashboard artifact in agent-html/artifacts using Agent-HTML Canvas.
+Read agent-html/README.md and agent-html/AGENTS.md first.
+```
+
 ## Documentation
 
 - [Canvas docs](./apps/docs/content/docs/canvas/index.mdx): current Canvas constitution, architecture, workspace, host, design-system, and reference docs.

README.zh-CN.md

@@ -76,6 +76,33 @@ Canvas prompt routing 使用 artifact metadata、block ids、可选 implementati
 - 本地复用：Canvas 让最近的正确 primitive、hook、helper、schema、fixture 或 asset 更容易被找到。
 - 边界保护：artifact source 与 host internals、old runtime surfaces、generated bundles 和 privileged APIs 保持分离。
 
+## 快速开始
+
+安装 npm 包：
+
+```bash
+npm install agent-html
+```
+
+创建本地 Canvas 工作区：
+
+```bash
+npx agent-html init
+```
+
+启动 Canvas host：
+
+```bash
+npx agent-html dev
+```
+
+然后让你的 agent 在 `agent-html/artifacts` 里创建或修改 React artifact：
+
+```text
+使用 Agent-HTML Canvas 在 agent-html/artifacts 里创建一个 dashboard artifact。
+请先阅读 agent-html/README.md 和 agent-html/AGENTS.md。
+```
+
 ## 文档
 
 - [Canvas docs](./apps/docs/content/docs/canvas/index.mdx)：当前 Canvas constitution、architecture、workspace、host、design-system 和 reference docs。