fix: energy spin movestate colors never rendered

The movestate property sat on the spinbox's inner QLineEdit, which both
themes deliberately paint transparent (QAbstractSpinBox QLineEdit rule)
- the state machine worked but no color ever showed, and the tests only
asserted the property, not the paint. The property now lives on the
spinbox itself with QAbstractSpinBox[movestate=...] added to both
themes' rules, verified by a pixel-sampling regression test that grabs
the rendered widget through the real stylesheet.

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

src/aare/gui/styles.py

@@ -744,12 +744,15 @@ def _sunrise_stylesheet(overrides: dict[str, str] | None = None) -> str:
     }
 
     /* Motor batch-move states (before the invalid rules on purpose: equal
-       specificity, so out-of-range red must come last to win). */
-    QLineEdit[movestate="pending"] {
+       specificity, so out-of-range red must come last to win). Spinboxes
+       (Set Energy) carry the property on the box itself — their inner
+       QLineEdit is transparent by design (rule below), so it can't show
+       the state. */
+    QLineEdit[movestate="pending"], QAbstractSpinBox[movestate="pending"] {
         background-color: $input_pending_bg;
     }
 
-    QLineEdit[movestate="moving"] {
+    QLineEdit[movestate="moving"], QAbstractSpinBox[movestate="moving"] {
         background-color: $input_moving_bg;
     }
 
@@ -1429,11 +1432,11 @@ def _sunset_stylesheet() -> str:
         background-color: $dark_disabled;
     }
 
-    QLineEdit[movestate="pending"] {
+    QLineEdit[movestate="pending"], QAbstractSpinBox[movestate="pending"] {
         background-color: $dark_input_pending_bg;
     }
 
-    QLineEdit[movestate="moving"] {
+    QLineEdit[movestate="moving"], QAbstractSpinBox[movestate="moving"] {
         background-color: $dark_input_moving_bg;
     }
 

src/aare/gui/widgets/motor_move_group.py

@@ -26,10 +26,10 @@ class SpinMoveState(QObject):
     """MotorMoveGroup's state machine for a single QDoubleSpinBox whose apply
     gate is a button (the Set Energy rows): neutral tracks the readback, a
     user edit stages pending (orange) and enables the button, the click turns
-    moving (green), and arrival within tol returns to neutral. Colors ride the
-    same movestate QSS via the spinbox's internal QLineEdit, so no new
-    styling. The caller keeps its own clicked connection for the actual send;
-    this object only tracks state."""
+    moving (green), and arrival within tol returns to neutral. The movestate
+    property sits on the spinbox itself — its inner QLineEdit is transparent
+    by theme design, so coloring it shows nothing. The caller keeps its own
+    clicked connection for the actual send; this object only tracks state."""
 
     def __init__(self, spin: QDoubleSpinBox, button: QPushButton, tol: float, parent=None):
         super().__init__(parent)
@@ -76,11 +76,10 @@ class SpinMoveState(QObject):
             self._syncing = False
 
     def _set_state(self, state: str):
-        box = self._spin.lineEdit()
-        if box.property("movestate") != state:
-            box.setProperty("movestate", state)
-            box.style().unpolish(box)
-            box.style().polish(box)
+        if self._spin.property("movestate") != state:
+            self._spin.setProperty("movestate", state)
+            self._spin.style().unpolish(self._spin)
+            self._spin.style().polish(self._spin)
         self._state = state
         self._button.setEnabled(state == "pending")