GUI State manager: for handlign Qsettings - WIP

src/aare/gui/models/gui_state_manager.py

@@ -0,0 +1,48 @@
+import json
+from PySide6.QtCore import QSettings
+
+
+class UIStateManager:
+    def __init__(self, organization="PSI", app="AareGUI"):
+        self.settings = QSettings(organization, app)
+
+    def save_window(self, window):
+        self.settings.setValue("main_window/geometry", window.saveGeometry())
+        self.settings.setValue("main_window/state", window.saveState())
+
+    def restore_window(self, window):
+        geometry = self.settings.value("main_window/geometry")
+        if geometry:
+            window.restoreGeometry(geometry)
+
+        state = self.settings.value("main_window/state")
+        if state:
+            window.restoreState(state)
+
+    def save_model(self, key: str, model):
+        try:
+
+            data = model.to_list()
+            self.settings.setValue(key, json.dumps(data))
+
+        except Exception as e:
+            print(f"Failed to save model {key}: {e}")
+
+    def restore_model(self, key: str, model):
+        try:
+            raw = self.settings.value(key)
+            if not raw:
+                return
+
+            data = json.loads(raw)
+
+            model.from_list(data)
+
+        except Exception as e:
+            print(f"Failed to restore model {key}: {e}")
+
+    def save_value(self, key: str, value):
+        self.settings.setValue(key, value)
+
+    def load_value(self, key: str, default=None, value_type=None):
+        return self.settings.value(key, default, type=value_type)