# PySide6 6.7+ Compatibility Issue: setSelectionArea API Change

## Issue

When using NodeGraphQt-QuiltiX-fork with PySide6 6.7+, dragging a rubber band selection in the node graph causes repeated TypeError exceptions:

```
TypeError: 'PySide6.QtWidgets.QGraphicsScene.setSelectionArea' called with wrong argument types:
  PySide6.QtWidgets.QGraphicsScene.setSelectionArea(QPainterPath, ItemSelectionMode)
Supported signatures:
  PySide6.QtWidgets.QGraphicsScene.setSelectionArea(PySide6.QtGui.QPainterPath, PySide6.QtGui.QTransform)
  PySide6.QtWidgets.QGraphicsScene.setSelectionArea(PySide6.QtGui.QPainterPath, PySide6.QtCore.Qt.ItemSelectionOperation = Instance(Qt.ReplaceSelection), PySide6.QtCore.Qt.ItemSelectionMode = Instance(Qt.IntersectsItemShape), PySide6.QtGui.QTransform = Default(QTransform))
```

## Root Cause

The `QGraphicsScene.setSelectionArea()` method signature changed in PySide6 6.7. The old signature allowed:

```python
setSelectionArea(path, mode)  # mode = Qt.ItemSelectionMode
```

The new signature requires:

```python
setSelectionArea(path, operation, mode)  # operation = Qt.ItemSelectionOperation
```

## Affected File

`NodeGraphQt/widgets/viewer.py` line 524-526

## Current Code

```python
self.scene().setSelectionArea(
    path, QtCore.Qt.IntersectsItemShape
)
```

## Fix

```python
self.scene().setSelectionArea(
    path, QtCore.Qt.ReplaceSelection,
    QtCore.Qt.IntersectsItemShape
)
```

## Environment

- Python: 3.12
- PySide6: 6.6.3.1 (installed by NodeGraphQt-QuiltiX-fork, but issue affects 6.7+)
- NodeGraphQt-QuiltiX-fork: 0.7.0

## Workaround

Apply this patch after installation:

```python
# In viewer.py, change line 524-526 from:
self.scene().setSelectionArea(
    path, QtCore.Qt.IntersectsItemShape
)

# To:
self.scene().setSelectionArea(
    path, QtCore.Qt.ReplaceSelection,
    QtCore.Qt.IntersectsItemShape
)
```

## Related

This issue may also exist in:
- Original NodeGraphQt
- OdenGraphQt
- Other forks

The fix is backward compatible with older PySide6 versions that support the 3-argument signature.