fix(telegram): thread incident follow-up messages

apps/api/tests/test_telegram_message_templates.py

@@ -251,10 +251,79 @@ def test_outbound_message_type_inference():
     assert (
         telegram_gateway_module._infer_outbound_message_type(
             "✅ 執行成功",
-            {"reply_to_message_id": 123},
+            {"reply_parameters": {"message_id": 123}},
         )
         == "final"
     )
+    assert (
+        telegram_gateway_module._infer_outbound_message_type(
+            "📄 <b>RUNBOOK REVIEW｜待審核</b>",
+            {"reply_parameters": {"message_id": 123}},
+        )
+        == "approval_request"
+    )
+
+
+def test_extract_incident_id_from_text():
+    """Telegram 出站文字可擷取 Incident ID，供後續訊息接回原告警卡片。"""
+
+    assert (
+        telegram_gateway_module._extract_incident_id_from_text(
+            "Incident: INC-20260506-E54736\nEntry ID: abc"
+        )
+        == "INC-20260506-E54736"
+    )
+    assert telegram_gateway_module._extract_incident_id_from_text("沒有事件編號") is None
+
+
+@pytest.mark.asyncio
+async def test_attach_incident_thread_reply(monkeypatch):
+    """非主卡、含 Incident ID 的後續訊息，應自動 reply 原告警 message_id。"""
+
+    class FakeRedis:
+        async def get(self, key):
+            assert key == "tg_msg:INC-20260506-E54736"
+            return "9876"
+
+    gateway = TelegramGateway()
+    payload = {
+        "chat_id": gateway.alert_chat_id,
+        "text": "📄 RUNBOOK REVIEW｜待審核\nIncident: INC-20260506-E54736",
+    }
+
+    monkeypatch.setattr(telegram_gateway_module, "get_redis", lambda: FakeRedis())
+
+    await gateway._attach_incident_thread_reply("sendMessage", payload)
+
+    assert payload["reply_parameters"] == {
+        "message_id": 9876,
+        "allow_sending_without_reply": True,
+    }
+
+
+@pytest.mark.asyncio
+async def test_attach_incident_thread_skips_root_action_card(monkeypatch):
+    """ACTION REQUIRED 主告警卡不應自動 reply 舊訊息。"""
+
+    class FakeRedis:
+        async def get(self, key):  # pragma: no cover - 不應被呼叫
+            raise AssertionError(key)
+
+    gateway = TelegramGateway()
+    payload = {
+        "chat_id": gateway.alert_chat_id,
+        "text": (
+            "ℹ️ ACTION REQUIRED | 低風險\n"
+            "📋 INC-20260506-E54736\n"
+            "🤖 AI 自動化鏈路"
+        ),
+    }
+
+    monkeypatch.setattr(telegram_gateway_module, "get_redis", lambda: FakeRedis())
+
+    await gateway._attach_incident_thread_reply("sendMessage", payload)
+
+    assert "reply_parameters" not in payload
 
 
 def test_legacy_outbound_run_id_is_stable():