feat: 效能分析flow区间携带自然/工作日双时长并支持时间过滤

backend/app/api/v1/endpoints/analytics.py

@@ -40,12 +40,16 @@ async def flow_compare(
     product_sns: str | None = Query(None, description="身份证，逗号分隔"),
     spec_models: str | None = Query(None, description="规格型号，逗号分隔（无 product_sns 时按型号取最近设备）"),
     mode: str = Query("natural", description="时间口径: natural(自然小时) / workdays(工作小时,排除周末节假日)"),
+    since: str | None = Query(None, description="起始日期 ISO"),
+    until: str | None = Query(None, description="截止日期 ISO"),
     db: AsyncSession = Depends(get_db),
 ):
     """设备流转对比 — 每台设备各操作人耗时（堆叠柱状，按人堆叠，识别瓶颈）。"""
     sns = [s.strip() for s in product_sns.split(",") if s.strip()] if product_sns else None
     specs = [s.strip() for s in spec_models.split(",") if s.strip()] if spec_models else None
-    return await get_flow_compare(db, product_sns=sns, spec_models=specs, mode=mode)
+    since_dt = datetime.fromisoformat(since) if since else None
+    until_dt = datetime.fromisoformat(until) if until else None
+    return await get_flow_compare(db, product_sns=sns, spec_models=specs, mode=mode, since=since_dt, until=until_dt)
 
 
 @router.get("/options", response_model=AnalyticsOptions)