migrate pyqt5 to pyside6

shared/src/orisys_app_shared/theme/qss.py

@@ -33,8 +33,8 @@ def _arrow_icon_cache_dir() -> Path:
 def _paint_arrow(kind: str, fill: str) -> str:
     """Draw a small chevron PNG on demand; return its path ('' on failure)."""
     try:
-        from PyQt5.QtCore import QPointF, Qt
-        from PyQt5.QtGui import QColor, QImage, QPainter, QPolygonF
+        from PySide6.QtCore import QPointF, Qt
+        from PySide6.QtGui import QColor, QImage, QPainter, QPolygonF
     except Exception:  # pragma: no cover - headless import failure
         return ""
     try:
@@ -43,12 +43,12 @@ def _paint_arrow(kind: str, fill: str) -> str:
         path = _arrow_icon_cache_dir() / f"chevron_{kind}_{safe}.png"
         if path.is_file():
             return str(path)
-        image = QImage(size, size, QImage.Format_ARGB32)
-        image.fill(Qt.transparent)
+        image = QImage(size, size, QImage.Format.Format_ARGB32)
+        image.fill(Qt.GlobalColor.transparent)
         painter = QPainter(image)
-        painter.setRenderHint(QPainter.Antialiasing, True)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
         painter.setBrush(QColor(fill))
-        painter.setPen(Qt.NoPen)
+        painter.setPen(Qt.PenStyle.NoPen)
         half = size / 2.0
         top = size * 0.32
         bottom = size * 0.68