fix: 延迟加载 weixin 登录二维码依赖

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/services/weixin/login.ts

@@ -1,5 +1,3 @@
-import qrcode from 'qrcode-terminal'
-
 export interface QRCodeResult {
   qrcodeUrl?: string
   qrcodeId: string
@@ -15,6 +13,23 @@ export interface LoginResult {
   message: string
 }
 
+async function renderQrCodeToTerminal(qrcodeUrl: string): Promise<void> {
+  const moduleName = 'qrcode-terminal'
+  const { default: qrcode } = (await import(moduleName)) as {
+    default: {
+      generate: (
+        text: string,
+        options?: { small?: boolean },
+        callback?: (output: string) => void,
+      ) => void
+    }
+  }
+
+  qrcode.generate(qrcodeUrl, { small: true }, output => {
+    process.stderr.write(`${output}\n`)
+  })
+}
+
 export async function startLogin(apiBaseUrl: string): Promise<QRCodeResult> {
   const response = await fetch(`${apiBaseUrl}/ilink/bot/get_bot_qrcode?bot_type=3`)
   if (!response.ok) {
@@ -32,9 +47,7 @@ export async function startLogin(apiBaseUrl: string): Promise<QRCodeResult> {
 
   const qrcodeUrl = data.qrcode_img_content || ''
   if (qrcodeUrl) {
-    qrcode.generate(qrcodeUrl, { small: true }, output => {
-      process.stderr.write(`${output}\n`)
-    })
+    await renderQrCodeToTerminal(qrcodeUrl)
   }
 
   return {