fix: template defects

src/components/Markdowns/MarkdownView.js

@@ -34,11 +34,12 @@ const Translate = ({variable, value}) => {
 
 const ParseTemplate = ({template, variables}) => {
     if(!template || !Array.isArray(template.parameters)) return '';
+    const vars = variables || {};
     let res = template.layout ?? '';
     for (const parameter of template.parameters) {
         res = res.replaceAll(`<${parameter.name}/>`, Translate({
             variable: parameter,
-            value: variables[parameter.name]
+            value: vars[parameter.name]
         }));
     }
     return res;
@@ -64,6 +65,7 @@ const MarkdownView = ({ content, template, height="auto" }) => {
         layout: "<markdown/>",
         title: "default"
     };
+
     return (
         <div className="markdown-preview" style={{height}}>
             <ReactMarkdown