NSettingsIndicator: add default setting indicator (#1080)

N*Widgets: show NSettingsIndicator if settings are not default

Widgets/NSearchableComboBox.qml

@@ -18,6 +18,9 @@ RowLayout {
   property string placeholder: ""
   property string searchPlaceholder: I18n.tr("placeholders.search")
   property Component delegate: null
+  property bool isSettings: false
+  property var defaultValue: ""
+  property string settingsPath: ""
 
   readonly property real preferredHeight: Style.baseWidgetSize * 1.1
 
@@ -26,6 +29,49 @@ RowLayout {
   spacing: Style.marginL
   Layout.fillWidth: true
 
+  readonly property bool isValueChanged: isSettings && (currentKey !== defaultValue)
+  readonly property string indicatorTooltip: {
+    if (!isSettings) return "";
+    var displayValue = "";
+    if (defaultValue === "") {
+      // Try to find the display name for empty key in the model
+      if (model && model.count > 0) {
+        for (var i = 0; i < model.count; i++) {
+          var item = model.get(i);
+          if (item && item.key === "") {
+            displayValue = item.name || I18n.tr("settings.indicator.system-default");
+            break;
+          }
+        }
+        // If not found in model, show "System Default" instead of "(empty)"
+        if (displayValue === "") {
+          displayValue = I18n.tr("settings.indicator.system-default");
+        }
+      } else {
+        displayValue = I18n.tr("settings.indicator.system-default");
+      }
+    } else {
+      // Try to find the display name for the default key in the model
+      if (model && model.count > 0) {
+        for (var i = 0; i < model.count; i++) {
+          var item = model.get(i);
+          if (item && item.key === defaultValue) {
+            displayValue = item.name || String(defaultValue);
+            break;
+          }
+        }
+        if (displayValue === "") {
+          displayValue = String(defaultValue);
+        }
+      } else {
+        displayValue = String(defaultValue);
+      }
+    }
+    return I18n.tr("settings.indicator.default-value", {
+                     "value": displayValue
+                   });
+  }
+
   // Filtered model for search results
   property ListModel filteredModel: ListModel {}
   property string searchText: ""
@@ -113,6 +159,8 @@ RowLayout {
   NLabel {
     label: root.label
     description: root.description
+    showIndicator: root.isSettings && root.isValueChanged
+    indicatorTooltip: root.indicatorTooltip
   }
 
   Item {
@@ -339,4 +387,5 @@ RowLayout {
       }
     }
   }
+
 }