把星盘接口的计算和 HTTP 拆成两个类，离线入口不再伪造请求对象。

方法体未改。定向测试 383 通过；1 条校正回归在基线上同样失败，断言未改。快速门和全量 pytest 未跑。

Co-Authored-By: Grok (agent loop)

tests/test_declared_window_chart.py

@@ -79,9 +79,9 @@ def test_window_packet_probes_always_pass_hour_and_minute(monkeypatch: pytest.Mo
 
 
 def test_api_handler_rejects_hour_on_declared_window() -> None:
-    from jyotish_api_server import BadRequest, JyotishAPIHandler
+    from jyotish_api_server import BadRequest, JyotishComputeService
 
-    handler = JyotishAPIHandler.__new__(JyotishAPIHandler)
+    handler = JyotishComputeService()
     with pytest.raises(BadRequest, match="single birth minute"):
         handler._compute_declared_window_chart({
             **BIRTH_PLACE,