fix(incidents): keep list endpoint pure read

apps/api/tests/integration/test_incident_api.py

@@ -17,8 +17,8 @@ Incident API 整合測試
 - GET /api/v1/monitoring/status — 監控工具狀態
 
 注意: GET /api/v1/incidents 不在此測試
-  原因: 該端點觸發 AI 決策生成 (LLM 呼叫)，回應時間 30s+，
-  不適合整合測試。應使用 smoke_test_alert_chain.py 驗證。
+  原因: 該端點是前端輪詢路徑，應維持純讀與低延遲；
+  是否背景觸發 AI 決策由獨立 unit test 驗證，修復建議生成改走 proposal/operator-run 入口。
 """
 
 import os

apps/api/tests/test_incidents_list_pure_read.py

@@ -0,0 +1,53 @@
+"""
+Incident list endpoint pure-read regression tests.
+
+目的:
+- GET /api/v1/incidents 是前端輪詢與 AwoooP Console 的列表路徑。
+- 預設不得因為缺少 decision token 就背景啟動 LLM / Ollama / OpenClaw。
+"""
+
+from datetime import UTC, datetime
+
+import pytest
+
+from src.api.v1 import incidents as incidents_api
+from src.models.incident import Incident, Severity
+
+
+class _IncidentService:
+    async def get_active_incidents(self) -> list[Incident]:
+        return [
+            Incident(
+                incident_id="INC-20260506-PURE01",
+                severity=Severity.P2,
+                affected_services=["awoooi-api"],
+                created_at=datetime(2026, 5, 6, 12, 0, tzinfo=UTC),
+                updated_at=datetime(2026, 5, 6, 12, 1, tzinfo=UTC),
+            )
+        ]
+
+
+class _DecisionManager:
+    def __init__(self) -> None:
+        self.created = 0
+
+    async def _find_existing_token(self, incident_id: str):
+        return None
+
+    async def get_or_create_decision(self, *args, **kwargs):
+        self.created += 1
+        raise AssertionError("GET /incidents must not create AI decisions by default")
+
+
+@pytest.mark.asyncio
+async def test_list_incidents_does_not_trigger_ai_decision_by_default(monkeypatch):
+    decision_manager = _DecisionManager()
+    monkeypatch.setattr(incidents_api, "get_incident_service", lambda: _IncidentService())
+    monkeypatch.setattr(incidents_api, "get_decision_manager", lambda: decision_manager)
+
+    result = await incidents_api.list_incidents(generate_missing_decisions=False)
+
+    assert result.count == 1
+    assert result.incidents[0].incident_id == "INC-20260506-PURE01"
+    assert result.incidents[0].decision is None
+    assert decision_manager.created == 0