feat(dev): add playground to render syntax

dev/src/App.tsx

@@ -2,6 +2,7 @@ import { Flex, Radio } from 'antd';
 import { useState } from 'react';
 import { Composite } from './Composite';
 import { ItemPreview } from './ItemPreview';
+import { Playground } from './Playground';
 import { Preview } from './Preview';
 import { StreamPreview } from './StreamPreview';
 
@@ -32,6 +33,7 @@ export const App = () => {
           { label: '模版预览', value: 'preview' },
           { label: '数据项预览', value: 'item' },
           { label: '流式渲染', value: 'stream' },
+          { label: '语法渲染', value: 'playground' },
         ]}
         value={tab}
         onChange={(e) => handleTabChange(e.target.value)}
@@ -46,6 +48,8 @@ export const App = () => {
         <Preview />
       ) : tab === 'stream' ? (
         <StreamPreview />
+      ) : tab === 'playground' ? (
+        <Playground />
       ) : (
         <ItemPreview />
       )}

dev/src/Playground.tsx

@@ -0,0 +1,88 @@
+import Editor from '@monaco-editor/react';
+import { Card } from 'antd';
+import { useEffect, useState } from 'react';
+import { Infographic } from './Infographic';
+import { getStoredValues, setStoredValues } from './utils/storage';
+
+const STORAGE_KEY = 'playground-code';
+
+const DEFAULT_CODE = `infographic list-row-horizontal-icon-arrow
+data
+  title 信息图示例
+  desc 粘贴或编辑左侧语法，右侧实时预览
+  lists
+    - label 项目一
+      value 12.3
+      desc 描述文字
+      icon company-021_v1_lineal
+    - label 项目二
+      value 8.6
+      desc 描述文字
+      icon antenna-bars-5_v1_lineal
+    - label 项目三
+      value 15.1
+      desc 描述文字
+      icon achievment-050_v1_lineal
+`;
+
+export const Playground = () => {
+  const [code, setCode] = useState(DEFAULT_CODE);
+  const [options, setOptions] = useState(DEFAULT_CODE);
+
+  // Hydrate from localStorage on mount
+  useEffect(() => {
+    const saved = getStoredValues<{ code: string }>(STORAGE_KEY);
+    if (saved?.code) {
+      setCode(saved.code);
+      setOptions(saved.code);
+    }
+  }, []);
+
+  // Debounce: update preview 500ms after last edit, also persist
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      setOptions(code);
+      setStoredValues(STORAGE_KEY, { code });
+    }, 500);
+    return () => clearTimeout(timer);
+  }, [code]);
+
+  return (
+    <div
+      style={{
+        display: 'flex',
+        gap: 16,
+        padding: 16,
+        flex: 1,
+        overflow: 'hidden',
+      }}
+    >
+      <div style={{ width: 420, display: 'flex', flexDirection: 'column' }}>
+        <Card title="语法输入" size="small" style={{ flex: 1 }}>
+          <div style={{ height: 'calc(100vh - 160px)' }}>
+            <Editor
+              height="100%"
+              defaultLanguage="plaintext"
+              value={code}
+              theme="vs-dark"
+              options={{
+                minimap: { enabled: false },
+                fontSize: 13,
+                lineNumbers: 'on',
+                scrollBeyondLastLine: false,
+                wordWrap: 'on',
+              }}
+              onChange={(value) => setCode(value || '')}
+            />
+          </div>
+        </Card>
+      </div>
+
+      <div style={{ flex: 1, overflow: 'auto' }}>
+        <Card title="预览" size="small" style={{ height: '100%' }}>
+          <Infographic options={options} />
+        </Card>
+      </div>
+    </div>
+  );
+};