feat: add syntax highlighting for python/docker/yaml/hcl + fix marked renderer

app.js

@@ -14,7 +14,15 @@
   }
 
   function renderMarkdown(md) {
-    if (window.marked) return marked.parse(md);
+    if (window.marked) {
+      const renderer = new marked.Renderer();
+      renderer.code = function(code, lang) {
+        const language = lang || 'bash';
+        const validLang = Prism.languages[language] ? language : 'bash';
+        return `<pre><code class="language-${validLang}">${escapeHtml(code)}</code></pre>`;
+      };
+      return marked.parse(md, { renderer });
+    }
     return `<pre>${escapeHtml(md)}</pre>`;
   }
 

index.html

@@ -6,9 +6,13 @@
   <title>DeepShell Chat</title>
 
   <!-- Optional: Prism for code highlighting inside responses -->
-  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/themes/prism.min.css" />
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/themes/prism-tomorrow.min.css" />
   <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/prism.min.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/components/prism-bash.min.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/components/prism-python.min.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/components/prism-docker.min.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/components/prism-yaml.min.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/components/prism-hcl.min.js"></script>
 
   <!-- Optional: marked for Markdown rendering -->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/12.0.2/marked.min.js"></script>