fix: no BEAMLINE BUSY overlay during Sample alignment

Same exception as the motion watch: busy in Sample alignment is the
alignment itself, and the sample motion is watched in these very
views - the curtain hid exactly what the user needed to see. Gated
at both style call sites (sample camera and the Axis views); the
session-driven 'In viewing mode' badge is unaffected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/aare/gui/main_window.py

@@ -2734,8 +2734,10 @@ class MainWindow(QMainWindow):
         if hasattr(self, "gonio_camera_thread") and self.gonio_camera_thread is not None:
             self.gonio_camera_thread.set_busy(s.busy)
 
+        # Sample alignment busy is the alignment itself (same exception as
+        # the motion watch below) — no BEAMLINE BUSY curtain on any view.
         busy_style = build_busy_overlay_style(
-            is_busy=bool(s.busy),
+            is_busy=bool(s.busy) and s.state != BeamlineStateEnum.SampleAlignment,
             tell_state=s.tell_state,
             session_state=getattr(getattr(s, "session", None), "session", None),
         )

src/aare/gui/widgets/camera_image.py

@@ -804,8 +804,14 @@ class SampleCameraImageLabel(QGraphicsView):
             self._session_state = new_session_state
             self.update()
 
+        # Same exception as the main window's motion watch: busy during
+        # Sample alignment IS the alignment, and the sample motion is watched
+        # right here — no BEAMLINE BUSY curtain over it. The "In viewing
+        # mode" badge is session-driven and unaffected by the gate.
         new_busy_style = build_busy_overlay_style(
-            is_busy=bool(s.busy), tell_state=s.tell_state, session_state=self._session_state
+            is_busy=bool(s.busy) and s.state != BeamlineStateEnum.SampleAlignment,
+            tell_state=s.tell_state,
+            session_state=self._session_state,
         )
         if new_busy_style != self._busy_overlay_style:
             self._busy_overlay_style = new_busy_style