回放叠加改用展开底图，并统一 2D/3D 投递。

箭头/采集图像与 live 的 processed_frame 对齐；deliver_measurement 先画 2D 再提交同一包给 3D。已用 overlay、scene3d 与 replay 相关测试验证。

shared/tests/test_overlay_base.py

@@ -0,0 +1,35 @@
+"""Overlay base projector: session cache and no fisheye resize fallback."""
+
+from __future__ import annotations
+
+import numpy as np
+
+from orisys_app_shared.analysis.overlay_base import OverlayBaseProjector
+
+
+def test_overlay_projector_reuses_the_same_frame_id() -> None:
+    calls: list[int] = []
+
+    def project(frame: np.ndarray) -> np.ndarray:
+        calls.append(1)
+        out = np.zeros((8, 8, 3), dtype=np.uint8)
+        out[..., 1] = 40
+        return out
+
+    projector = OverlayBaseProjector(sensor_type="finger", project=project)
+    first = projector.project(np.zeros((32, 32, 3), dtype=np.uint8), frame_id=7)
+    second = projector.project(np.ones((32, 32, 3), dtype=np.uint8) * 9, frame_id=7)
+    assert len(calls) == 1
+    assert first is second
+    third = projector.project(np.zeros((32, 32, 3), dtype=np.uint8), frame_id=8)
+    assert len(calls) == 2
+    assert third is not second
+    projector.close()
+
+
+def test_open_from_unknown_sensor_type_returns_none() -> None:
+    class _Prov:
+        sensor_type = "unknown"
+        sensor_config_ref = ""
+
+    assert OverlayBaseProjector.open_from_provenance(_Prov()) is None