补齐 Autocal 实时反馈与稳定窗口复核

显示实时力值、曲线及 UV 图层，并保存人工确认窗口和零载检查基准。定向测试、真实视频预览与已录会话复核闭环验证通过。

shared/tests/test_force_history.py

@@ -3,9 +3,22 @@
 from __future__ import annotations
 
 import pytest
+import numpy as np
+import warnings
 from orisys_app_shared.force.history import MetricHistory
 
 
+def test_unavailable_channels_keep_gaps_without_empty_slice_warnings():
+    history = MetricHistory()
+    history.push(1, np.nan, np.nan, np.nan)
+    with warnings.catch_warnings():
+        warnings.simplefilter("error", RuntimeWarning)
+        state = history.state()
+    assert np.isnan(state.values).all()
+    assert all(np.isfinite(bounds).all() and bounds[0] < bounds[1]
+               for bounds in state.y_ranges)
+
+
 def _push_at_rate(hist: MetricHistory, *, fps: float, duration_sec: float, t0: float = 1000.0) -> None:
     dt = 1.0 / fps
     n = int(round(duration_sec * fps)) + 1