Use calibration_required property to conditionally render z cal step

src/openflexure_microscope_server/things/stage/__init__.py

@@ -166,6 +166,9 @@ class BaseStage(lt.Thing):
     )
     """Used to convert coordinates between the program frame and the hardware frame."""
 
+    calibration_required: bool = lt.setting(default=False)
+    """Whether calibration of the stage z axis is required."""
+
     def update_position(self) -> None:
         """Update the position property from the stage."""
         # Copy the position before the move.
@@ -535,3 +538,8 @@ class BaseStage(lt.Thing):
         This method provides the interface expected by the camera_stage_mapping.
         """
         self.move_absolute(x=xyz_pos[0], y=xyz_pos[1], z=xyz_pos[2])
+
+    @lt.action
+    def mark_calibration_complete(self) -> None:
+        """Mark stage calibration as complete."""
+        self.calibration_required = False

src/openflexure_microscope_server/things/stage/sangaboard.py

@@ -236,3 +236,6 @@ class SangaboardThing(BaseStage):
                 self._sangaboard.query(f"{led_command} {on_brightness}")
             else:
                 self._sangaboard.query(f"{led_command} 0")
+
+    calibration_required: bool = lt.setting(default=True)
+    """By default, Sangaboard stage will require calibration of z direction."""