Merge pull request 'fix(avatar): 部署重启后自动恢复 BOXIM 接管' (#6) from codex/avatar-takeover-restart-safe-20260826 into main

Reviewed-on: #6

digital-avatar-app/backend/tests/test_takeover_service.py

@@ -291,5 +291,41 @@ async def test_connection_failure_disables_takeover_and_stops_retrying(service_c
     boxim.exchange_access_token.assert_awaited_once_with("prod-huihui-token")
 
 
+@pytest.mark.asyncio
+async def test_transient_connection_failure_keeps_takeover_and_recovers(service_context):
+    session_factory, service, boxim, _ = service_context
+    boxim.exchange_access_token = AsyncMock(
+        side_effect=[
+            BoxIMError("连接超时"),
+            {"accessToken": "box-token", "accessTokenExpiresIn": 3600},
+        ]
+    )
+
+    await service.poll_messages()
+
+    db = session_factory()
+    try:
+        avatar = db.query(Avatar).one()
+        cursor = db.query(TakeoverCursor).one()
+        assert "takeover" in avatar.config["authorizationPermissions"]
+        assert cursor.initialized is False
+        assert "暂时连接失败" in cursor.last_error
+    finally:
+        db.close()
+
+    await service.poll_messages()
+
+    db = session_factory()
+    try:
+        avatar = db.query(Avatar).one()
+        cursor = db.query(TakeoverCursor).one()
+        assert "takeover" in avatar.config["authorizationPermissions"]
+        assert cursor.initialized is True
+        assert cursor.last_error == ""
+    finally:
+        db.close()
+    assert boxim.exchange_access_token.await_count == 2
+
+
 def test_plain_text_reply_removes_markdown_and_empty_lines():
     assert _plain_text_reply("## 建议\n\n**不能自行用药**\n`必要时就医`") == "建议\n不能自行用药\n必要时就医"