fix(studio): 统一 Box/Mini 箭头网格与强度着色

apps/studio/src/orisys_studio/app_window.py

@@ -1734,16 +1734,15 @@ class StudioMainWindow(QMainWindow):
         return wanted
 
     def _arrow_policy(self):
-        """The one flow-arrow policy the 2D canvas and the 3D surface both sample with.
+        """Use the box recording grid or the finger's shared 2D/3D display policy.
 
-        The thresholds and the sample grid are display settings (the pane's), so the
-        policy is built from them here and handed to the 2D renderer; the 3D composer
-        builds the same value from the same settings object
-        (``scene3d.composer`` via ``visual_policy.policy_for_settings``). That is what
-        makes the two figures trigger at the same strength: previously each path built
-        its own policy *and* the 3D one applied a hysteresis the canvas did not, so the
-        same frame could carry arrows in one figure and none in the other.
+        Box and mini analysis store samples on the SDK box grid; live rendering must
+        use that same grid. Finger keeps one policy for its 2D and 3D views.
         """
+        if self._draw_style() != "finger":
+            from orisys_app_shared.acquisition.arrows import sdk_box_policy
+
+            return sdk_box_policy()
         from orisys_app_shared.scene3d.visual_policy import policy_for_settings
 
         return policy_for_settings(self.mesh3d_panel.display_settings())