fix: preserve quoted message context across channels

test/session-title.test.mjs

@@ -42,6 +42,26 @@ test('initial Session titles strip only leading dsh-im context from structured p
   }), '<dsh_im_source>这是用户正文</dsh_im_source>');
 });
 
+test('initial Session titles ignore a leading reply reference block', () => {
+  const content = [
+    {
+      type: 'text',
+      text: '<dsh_im_source>{"channel":"feishu"}</dsh_im_source>',
+    },
+    {
+      type: 'text',
+      text: '<dsh_im_reply_to>{"content":"引用中的标题"}</dsh_im_reply_to>',
+    },
+    { type: 'text', text: '当前用户的问题' },
+  ];
+
+  assert.equal(initialSessionTitle({ content }), '当前用户的问题');
+  assert.equal(initialSessionTitle({
+    text: '当前原始问题',
+    content,
+  }), '当前原始问题');
+});
+
 test('initial Session titles truncate safely within the UTF-8 byte budget', () => {
   const title = initialSessionTitle({ text: '订单'.repeat(30) });
   assert.equal(title.endsWith('…'), true);