feat(Settings): Add sidebar state management on categories

quickshell/Common/SessionData.qml

@@ -134,6 +134,8 @@ Singleton {
     property string launcherLastMode: "all"
     property string appDrawerLastMode: "apps"
     property string niriOverviewLastMode: "apps"
+    property string settingsSidebarExpandedIds: ","
+    property string settingsSidebarCollapsedIds: ","
 
     Component.onCompleted: {
         if (!isGreeterMode) {
@@ -1104,6 +1106,12 @@ Singleton {
         saveSettings();
     }
 
+    function setSettingsSidebarState(expandedIds, collapsedIds) {
+        settingsSidebarExpandedIds = expandedIds;
+        settingsSidebarCollapsedIds = collapsedIds;
+        saveSettings();
+    }
+
     function syncWallpaperForCurrentMode() {
         if (!perModeWallpaper)
             return;

quickshell/Common/settings/SessionSpec.js

@@ -84,7 +84,10 @@ var SPEC = {
 
     launcherLastMode: { def: "all" },
     appDrawerLastMode: { def: "apps" },
-    niriOverviewLastMode: { def: "apps" }
+    niriOverviewLastMode: { def: "apps" },
+
+    settingsSidebarExpandedIds: { def: "," },
+    settingsSidebarCollapsedIds: { def: "," }
 };
 
 function getValidKeys() {

quickshell/Modals/Settings/SettingsSidebar.qml

@@ -370,6 +370,7 @@ Rectangle {
             if (_collapsedIds.indexOf(marker) < 0)
                 _collapsedIds = _collapsedIds + id + ",";
         }
+        SessionData.setSettingsSidebarState(_expandedIds, _collapsedIds);
     }
 
     function _setAutoExpanded(id, value) {
@@ -538,6 +539,11 @@ Rectangle {
     color: Theme.surfaceContainer
     radius: Theme.cornerRadius
 
+    Component.onCompleted: {
+        root._expandedIds = SessionData.settingsSidebarExpandedIds;
+        root._collapsedIds = SessionData.settingsSidebarCollapsedIds;
+    }
+
     StyledTextMetrics {
         id: __m1
         font.pixelSize: Theme.fontSizeMedium