fix some deprecations

Services/Sysinfo.qml

@@ -23,7 +23,7 @@ Singleton {
     Process {
         id: zigstatProcess
         running: true
-        command: [Quickshell.shellRoot + "/Programs/zigstat", updateInterval]
+        command: [Quickshell.shellDir + "/Programs/zigstat", updateInterval]
         stdout: SplitParser {
             onRead: function (line) {
                 try {

Services/WallpaperManager.qml

@@ -116,7 +116,7 @@ Singleton {
     Process {
         id: generateThemeProcess
         command: ["wallust", "run", currentWallpaper, "-u", "-k", "-d", "Templates"]
-        workingDirectory: Quickshell.configDir
+        workingDirectory: Quickshell.shellDir
         running: false
     }
 }

Widgets/Sidebar/Panel/System.qml

@@ -60,6 +60,11 @@ Rectangle {
                             cache: false
                             sourceSize.width: 44
                             sourceSize.height: 44
+                            onStatusChanged: {
+                                if (status === Image.Error) {
+                                    avatarImage.visible = false;
+                                }
+                            }
                         }
                         maskSource: Rectangle {
                             width: 44