feat(website): add standalone TeamAI site and use-case contribution entry

.github/workflows/website.yml

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+name: Website
+
+on:
+  pull_request:
+    paths:
+      - 'website/**'
+      - '.github/workflows/website.yml'
+  push:
+    branches: [main]
+    paths:
+      - 'website/**'
+      - '.github/workflows/website.yml'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: npm test
+        working-directory: website

website/README.md

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+# TeamAI website
+
+Standalone static site for [#1131](https://github.com/Tencent/teamai-cli/issues/1131). Node.js 20+; no dependencies, CLI code, or copied documentation.
+
+```sh
+cd website
+npm run build
+npm test
+python3 -m http.server 4173 --bind 127.0.0.1 --directory dist
+```
+
+Open `http://127.0.0.1:4173`. Python 3 is only needed for this local preview command; any static file server works. Deploy the contents of `website/dist/` to a static host. Links and assets are relative, so the site also works below a URL path. Hosting, domain, and automatic publication are left for the maintainers to choose.
+
+## Contribute a real use case
+
+First share a proposal in [#1131](https://github.com/Tencent/teamai-cli/issues/1131): how your team set TeamAI up and how it uses it. Include the tools you use, a public-safe repo layout, and one real workflow. Do not include private code, credentials, or invented results.
+
+After agreeing the scope, contribute an HTML page under `website/use-cases/` and link it from the homepage's use-cases section. Use relative asset links (for example `../styles.css`) and accessible headings. The build copies these pages unchanged. If a case is written in another language, set its HTML `lang` appropriately.
+
+There are no contributed cases yet. Keep `use-cases/` empty until the first real contribution; Git does not track empty directories, so the build creates it if missing. Do not add a placeholder story or `.gitkeep` there.

website/README.zh-CN.md

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+# TeamAI 网站
+
+[#1131](https://github.com/Tencent/teamai-cli/issues/1131) 的独立静态站点。需要 Node.js 20+；无额外依赖，不包含 CLI 源码或文档副本。
+
+```sh
+cd website
+npm run build
+npm test
+python3 -m http.server 4173 --bind 127.0.0.1 --directory dist
+```
+
+打开 `http://127.0.0.1:4173`。Python 3 只用于上述本地预览命令，也可使用其他静态文件服务器。将 `website/dist/` 内的文件部署到静态托管平台即可。链接和资源使用相对路径，也支持部署到 URL 子路径。托管平台、域名和自动发布方式由维护者确定。
+
+## 贡献真实使用案例
+
+先在 [#1131](https://github.com/Tencent/teamai-cli/issues/1131) 分享提议：团队如何搭建 TeamAI，以及日常如何使用。包括使用的工具、可公开的仓库结构和一个真实工作流。不要包含私有代码、凭据或编造的结果。
+
+范围确定后，在 `website/use-cases/` 下贡献 HTML 页面，并在首页案例区域添加链接。使用相对资源路径（如 `../styles.css`）和易于访问的标题结构。构建时原样复制这些页面。如果案例使用其他语言，请设置对应的 HTML `lang`。
+
+目前没有已贡献的案例。首个真实案例到来前保持 `use-cases/` 为空；Git 不跟踪空目录，构建会在缺失时创建它。不要在其中添加虚构案例或 `.gitkeep`。

website/build.mjs

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+import { cp, mkdir, rm } from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
+
+const root = new URL('./', import.meta.url);
+const output = new URL('dist/', root);
+await mkdir(new URL('use-cases/', root), { recursive: true });
+await rm(output, { recursive: true, force: true });
+await mkdir(new URL('use-cases/', output), { recursive: true });
+for (const name of ['index.html', 'styles.css', 'assets', 'use-cases']) {
+  await cp(new URL(name, root), new URL(name, output), { recursive: true });
+}
+console.log(`Built website at ${fileURLToPath(output)}`);

website/index.html

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+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="description" content="Your team's skills, rules, agents, and context. Managed in Git, shared across your AI coding tools. Meet TeamAI.">
+  <title>TeamAI — Make Every Team AI Native</title>
+  <link rel="icon" href="assets/logo.svg" type="image/svg+xml">
+  <link rel="stylesheet" href="styles.css">
+</head>
+<body>
+  <a class="skip-link" href="#main">Skip to content</a>
+  <header class="site-header wrap">
+    <a class="brand" href="./" aria-label="TeamAI home"><img src="assets/logo.svg" width="32" height="32" alt="">TeamAI<span class="brand-label">by Tencent</span></a>
+    <nav aria-label="Main navigation">
+      <a href="#how-it-works">Overview</a>
+      <a href="#use-cases">Use cases</a>
+      <a href="https://github.com/Tencent/teamai-cli/blob/main/docs/guide/getting-started.md">Documentation <span aria-hidden="true">↗</span></a>
+    </nav>
+    <a class="header-github" href="https://github.com/Tencent/teamai-cli"><svg viewBox="0 0 24 24" width="16" height="16" aria-hidden="true"><path fill="currentColor" d="M12 .7A11.3 11.3 0 0 0 8.4 22.7c.6.1.8-.2.8-.5v-2.1c-3.2.7-3.9-1.3-3.9-1.3-.5-1.3-1.3-1.6-1.3-1.6-1-.7.1-.7.1-.7 1.1.1 1.7 1.2 1.7 1.2 1 1.7 2.6 1.2 3.3.9.1-.7.4-1.2.7-1.4-2.6-.3-5.3-1.3-5.3-5.6 0-1.2.4-2.3 1.2-3.1-.1-.3-.5-1.5.1-3.1 0 0 1-.3 3.1 1.2a10.9 10.9 0 0 1 5.8 0c2.1-1.5 3.1-1.2 3.1-1.2.6 1.6.2 2.8.1 3.1.8.8 1.2 1.9 1.2 3.1 0 4.3-2.7 5.3-5.3 5.6.4.4.8 1.1.8 2.2v3.3c0 .3.2.6.8.5A11.3 11.3 0 0 0 12 .7Z"/></svg>GitHub<span aria-hidden="true">↗</span></a>
+  </header>
+  <main id="main">
+    <section class="hero" aria-labelledby="hero-title">
+      <div class="hero-grid" aria-hidden="true"></div>
+      <div class="hero-copy wrap">
+        <p class="announcement"><span class="status-dot" aria-hidden="true"></span> OPEN SOURCE <span class="announcement-divider">/</span> BUILT FOR YOUR TEAM</p>
+        <h1 id="hero-title">Great teams share<br><span>more than code.</span></h1>
+        <p class="intro">Your team's skills, rules, and knowledge.<br>One Git repo. Every AI coding tool.</p>
+        <div class="actions">
+          <a class="button primary" href="https://github.com/Tencent/teamai-cli/blob/main/docs/guide/getting-started.md">Start building together <span aria-hidden="true">↗</span></a>
+          <a class="button secondary" href="#how-it-works">Explore TeamAI <span aria-hidden="true">↓</span></a>
+        </div>
+        <p class="install"><span aria-hidden="true">$</span> npm install -g teamai-cli</p>
+      </div>
+      <div class="sync-window wrap">
+        <div class="window-bar"><div class="window-dots" aria-hidden="true"><i></i><i></i><i></i></div><span>ONE REPOSITORY. A SHARED WAY OF WORKING.</span><span class="window-label">TEAMAI</span></div>
+        <div class="sync-map">
+          <div class="assets-column"><p class="tiny-label">YOUR TEAM'S ASSETS</p><div class="asset"><span class="asset-icon" aria-hidden="true">/</span><strong>Skills</strong><span>Reusable expertise</span></div><div class="asset"><span class="asset-icon" aria-hidden="true">≡</span><strong>Rules</strong><span>Shared standards</span></div><div class="asset"><span class="asset-icon" aria-hidden="true">⌘</span><strong>Agents</strong><span>Specialist roles</span></div></div>
+          <div class="map-connector" aria-hidden="true"><span></span><b>→</b><span></span></div>
+          <div class="repo-node"><div class="repo-halo"><img src="assets/logo.svg" width="68" height="68" alt=""></div><h2>TeamAI</h2><p>Managed in Git.<br>Synced to your tools.</p><span class="repo-badge"><span aria-hidden="true">⑂</span> your-team / main</span></div>
+          <div class="map-connector" aria-hidden="true"><span></span><b>→</b><span></span></div>
+          <div class="tools-column"><p class="tiny-label">WHERE YOUR TEAM WORKS</p><div class="tool"><span class="tool-icon claude" aria-hidden="true">✳</span><strong>Claude Code</strong></div><div class="tool"><span class="tool-icon codex" aria-hidden="true">◎</span><strong>Codex</strong></div><div class="tool"><span class="tool-icon cursor" aria-hidden="true">↗</span><strong>Cursor</strong></div><div class="tool"><span class="tool-icon buddy" aria-hidden="true">⌁</span><strong>CodeBuddy</strong></div></div>
+        </div>
+        <div class="window-bottom"><span><span class="status-dot" aria-hidden="true"></span> Your tools. Your Git host. Your workflow.</span><a href="https://github.com/Tencent/teamai-cli/blob/main/docs/product-overview.md">See capabilities <span aria-hidden="true">↗</span></a></div>
+      </div>
+      <div class="supported wrap"><p>Built to work with the tools you already use.</p><div><span>Claude Code</span><span>Codex</span><span>Cursor</span><span>CodeBuddy</span><span>OpenCode</span></div></div>
+    </section>
+    <section class="principles wrap" id="how-it-works" aria-labelledby="how-title">
+      <div class="section-heading"><p class="eyebrow">01 — THE SHARED FOUNDATION</p><h2 id="how-title">Stop starting<br>from scratch.</h2><p>The best prompt, the right review rules, the hard-won context.<br>Give every teammate a better starting point.</p></div>
+      <div class="steps">
+        <article><span class="step-number">01</span><h3>Share what works.</h3><p>Keep skills, rules, agents, MCP, and model configuration in a team repository. Review changes with the Git workflow you know.</p><span class="feature-tag">GIT-NATIVE</span></article>
+        <article><span class="step-number">02</span><h3>Make it everyone's default.</h3><p>Set teammates up once. Session hooks pull the latest team assets into their AI coding tools, without a daily sync ritual.</p><span class="feature-tag">SET UP ONCE</span></article>
+        <article><span class="step-number">03</span><h3>Build on shared experience.</h3><p>Explore team learnings, codebase context, and usage. Context and improvement capabilities are currently in beta.</p><span class="feature-tag">CONTEXT &amp; IMPROVEMENT · BETA</span></article>
+      </div>
+    </section>
+    <section class="cases-section" id="use-cases" aria-labelledby="cases-title">
+      <div class="wrap cases-layout"><div class="cases-copy"><p class="eyebrow">02 — IN PRACTICE</p><h2 id="cases-title">The next story<br>starts with<br><span>your team.</span></h2><p>How did you set TeamAI up?<br>What does your everyday workflow look like?</p></div><div class="case-invitation"><span class="invitation-mark" aria-hidden="true">↗</span><p class="tiny-label">COMMUNITY USE CASES</p><h3>Show us how<br>you work.</h3><p>We're collecting the first real team stories. None have been published here yet.</p><a class="button case-button" href="https://github.com/Tencent/teamai-cli/issues/1131">Contribute your use case <span aria-hidden="true">↗</span></a><p class="case-note">Share your setup and one real workflow. Keep private code and credentials out.</p></div></div>
+    </section>
+    <section class="start wrap" aria-labelledby="start-title"><div><p class="eyebrow">03 — GET STARTED</p><h2 id="start-title">Your team.<br>On the same page.</h2><p>Connect your shared repository and bring<br>the team's way of working to every agent.</p><a class="text-link" href="https://github.com/Tencent/teamai-cli/blob/main/docs/guide/getting-started.md">Read the getting started guide <span aria-hidden="true">↗</span></a></div><div class="terminal"><div class="terminal-header"><span>TERMINAL</span><span>Node.js 20+</span></div><pre tabindex="0" role="region" aria-label="Installation commands, scroll horizontally to read"><code><span class="comment"># Install TeamAI</span>
+<span class="prompt">$</span> npm install -g teamai-cli
+
+<span class="comment"># Connect your team's repo</span>
+<span class="prompt">$</span> teamai init https://github.com/your-org/your-repo</code></pre><p>Replace the URL with your team's repository.<br>Prefer your AI tool? The guide also covers skill-based setup.</p></div></section>
+  </main>
+  <footer class="wrap"><div><a class="brand" href="./"><img src="assets/logo.svg" width="28" height="28" alt="">TeamAI</a><p>Make Every Team AI Native</p></div><div class="footer-links"><a href="https://github.com/Tencent/teamai-cli">GitHub ↗</a><a href="https://github.com/Tencent/teamai-cli/blob/main/.github/CONTRIBUTING.md">Contribute ↗</a><a href="https://github.com/Tencent/teamai-cli/blob/main/LICENSE">MIT License</a></div></footer>
+</body>
+</html>

website/package.json

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+{
+  "name": "teamai-website",
+  "private": true,
+  "type": "module",
+  "engines": { "node": ">=20" },
+  "scripts": {
+    "build": "node build.mjs",
+    "test": "node --test test.mjs"
+  }
+}