perf(agent): smooth SSE streaming updates

src/utils/agentMarkdown.ts

@@ -0,0 +1,21 @@
+import MarkdownIt from 'markdown-it'
+import mdLinkAttributes from 'markdown-it-link-attributes'
+
+const agentMarkdown = new MarkdownIt({
+  html: false,
+  breaks: true,
+  linkify: true,
+  typographer: true,
+})
+
+agentMarkdown.use(mdLinkAttributes, {
+  attrs: {
+    target: '_blank',
+    rel: 'noopener noreferrer',
+  },
+})
+
+// Agent 内容来自模型和工具输出，禁用原始 HTML 后统一转换为可展示 Markdown。
+export function renderAgentMarkdown(content: string) {
+  return content ? agentMarkdown.render(content) : ''
+}