QModListModel: turn into singleton

src/leek/mod_list.py

@@ -1,4 +1,4 @@
-from PySide6.QtQml import QmlElement
+from PySide6.QtQml import QmlElement, QmlSingleton
 from PySide6.QtCore import QAbstractListModel, QModelIndex
 from leek.mod import InvalidModError
 from leek.qmod import QMod
@@ -12,6 +12,7 @@ QML_IMPORT_MAJOR_VERSION = 1
 # Qt follows C++ naming conventions
 # ruff: noqa: N802
 @QmlElement
+@QmlSingleton
 class QModListModel(QAbstractListModel):
     def __init__(self, parent=None) -> None:
         super().__init__(parent=parent)

src/leek/qml/Main.qml

@@ -29,7 +29,7 @@ Kirigami.ApplicationWindow {
             id: modsView
 
             delegate: ModCardDelegate {}
-            model: QModListModel {}
+            model: QModListModel
         }
     }