fix(vite配置): 修正publicDir设置并更新demo页面逻辑

将publicDir从false改为'public'以正确访问静态资源
更新demo.html默认加载逻辑，自动指向/test.ocd并修改iframe引用为vocd.html

demo.html

@@ -18,18 +18,28 @@
     <div class="panel">
       <input id="urlInput" type="text" placeholder="输入同源文件URL" />
       <button id="loadBtn">设置 iframe 地址</button>
-      <small>仅拼接 iframe src：index.html?filePath=URL&mode=edit</small>
+      <small>仅拼接 iframe src：vocd.html?filePath=URL&mode=edit</small>
     </div>
-    <iframe id="editorFrame" src="./index.html" referrerpolicy="no-referrer"></iframe>
+    <iframe id="editorFrame" src="./vocd.html" referrerpolicy="no-referrer"></iframe>
 
     <script>
       const editorFrame = document.getElementById('editorFrame')
       const loadBtn = document.getElementById('loadBtn')
       const urlInput = document.getElementById('urlInput')
 
+      // 页面加载后，自动将 iframe 指向 vocd.html 并使用同源 /test.ocd
+      document.addEventListener('DOMContentLoaded', () => {
+        const defaultUrl = '/test.ocd' // 来自 public，同源可直接访问
+        urlInput.value = defaultUrl
+        const base = './vocd.html'
+        const src = `${base}?filePath=${encodeURIComponent(defaultUrl)}&mode=edit`
+        editorFrame.src = src
+        console.log('[demo] 自动设置 iframe src:', src)
+      })
+
       loadBtn.onclick = () => {
         const typedUrl = urlInput.value.trim()
-        const base = './index.html'
+        const base = './vocd.html'
         const src = typedUrl
           ? `${base}?filePath=${encodeURIComponent(typedUrl)}&mode=edit`
           : `${base}?mode=edit`
@@ -38,4 +48,4 @@
       }
     </script>
   </body>
-  </html>
+  </html>