docs: 安装方式修正为 Gitea 私有源（移除 jsDelivr/unpkg 官方源引用）

site/docs.html

@@ -109,8 +109,11 @@ footer a{color:var(--accent);text-decoration:none}
 <!-- 快速入门 -->
 <section id="quickstart">
 <h2>安装与引入</h2>
-<pre><span class="c-com"># npm 安装</span>
-<span class="c-kw">npm</span> install @metona-team/metona-editor
+<pre><span class="c-com"># npm 安装（Gitea 私有源）</span>
+<span class="c-kw">npm</span> install @metona-team/metona-editor <span class="c-punc">--</span>registry<span class="c-punc">=</span>https<span class="c-punc">:</span><span class="c-punc">//</span>git<span class="c-punc">.</span>metona<span class="c-punc">.</span>cn<span class="c-punc">/</span>api<span class="c-punc">/</span>packages<span class="c-punc">/</span>MetonaTeam<span class="c-punc">/</span>npm<span class="c-punc">/</span>
+
+<span class="c-com">// 或项目 .npmrc 配置 scope 后直接安装</span>
+<span class="c-com">// @metona-team:registry=https://git.metona.cn/api/packages/MetonaTeam/npm/</span>
 
 <span class="c-com">// TypeScript / ES Module</span>
 <span class="c-kw">import</span> MeEditor <span class="c-kw">from</span> <span class="c-str">'@metona-team/metona-editor'</span><span class="c-punc">;</span>