feat(scada): add calibrated monitoring and incident recovery

tests/unit/test_operational_presentation.py

@@ -6,7 +6,7 @@ from pydantic import ValidationError
 
 from app.domain.domain_errors import DomainError
 from app.domain.schemas.operational_data import TaskDataSnapshot
-from app.domain.schemas.operational_task import TaskPresentationEventCommand
+from app.domain.schemas.operational_task import TaskPresentationEventCommand, TaskSafeChart
 from app.services.operational_presentation import resolve_overlay
 
 
@@ -86,3 +86,27 @@ def test_unified_presentation_commands_preserve_flat_shape(command):
 def test_unified_presentation_rejects_invalid_commands(command):
     with pytest.raises(ValidationError):
         TaskPresentationEventCommand(request_id=uuid4(), run_id=uuid4(), source_session_id="session", command=command)
+
+
+def test_safe_chart_preserves_sparse_scatter_and_real_sample_times():
+    data = {"title": "压力对比", "chart_type": "line", "x_data": ["19:45", "20:00"],
+            "x_axis_name": "时刻", "y_axis_name": "压力 m", "series": [
+                {"name": "当前", "data": [0., 25.]},
+                {"name": "前一天", "type": "scatter", "data": [None, 26.],
+                 "sample_times": [None, "2026-06-13T20:00:00+08:00"]}]}
+    assert TaskSafeChart.model_validate(data).model_dump(mode="json") == data
+
+
+@pytest.mark.parametrize("series", [
+    {"name": "s", "data": [None], "sample_times": ["2026-06-14T20:00:00Z"]},
+    {"name": "s", "data": [1.], "sample_times": ["2026-06-14T20:00:00"]},
+    {"name": "s", "data": [1.], "sample_times": ["not-a-time"]},
+    {"name": "s", "data": [1.], "sample_times": ["2026-06-14 20:00:00+08:00"]},
+    {"name": "s", "data": [1.], "sample_times": []},
+    {"name": "s", "data": [float("inf")]},
+    {"name": "s", "data": [True]},
+    {"name": "s", "type": "script", "data": [1.]},
+])
+def test_safe_chart_rejects_invalid_sample_metadata_and_values(series):
+    with pytest.raises(ValidationError):
+        TaskSafeChart(title="X", chart_type="line", x_data=["t"], series=[series])