fix(teacher): 合并续接工具活动并修正暂停状态

tests/unit/teacher-cloud-activity.test.ts

@@ -29,10 +29,14 @@ describe('teacher cloud tool activity projection', () => {
   });
   it.each([
     ['tool-finished', { type: 'tool', content: 'tool result', status: 'success' }, undefined, 'completed'],
-    ['tool-error', undefined, 'private error', 'failed'],
   ])('accepts real %s events that carry only the call id', (event, output, error, status) => {
     expect(cloudToolActivity({ status: 'stream_event', event: { method: 'tools', data: {
       event, tool_call_id: 'call', output, error,
     } } }, 'run')).toEqual({ id: 'run:call', status });
   });
+  it('waits for the outcome instead of treating a raw tool error as failure', () => {
+    expect(cloudToolActivity({ status: 'stream_event', event: { method: 'tools', data: {
+      event: 'tool-error', tool_call_id: 'call', message: 'Interrupt',
+    } } }, 'question')).toBeUndefined();
+  });
 });