Remove need for polkit, launch any ArchUpdater update through terminal

ArchUpdater: rely on `TERMINAL` environment variable
README: Add explanation for the `TERMINAL` environment variable

Commons/Logger.qml

@@ -17,14 +17,6 @@ Singleton {
     }
   }
 
-  function _getStackTrace() {
-    try {
-      throw new Error("Stack trace")
-    } catch (e) {
-      return e.stack
-    }
-  }
-
   function log(...args) {
     var msg = _formatMessage(...args)
     console.log(msg)
@@ -39,20 +31,4 @@ Singleton {
     var msg = _formatMessage(...args)
     console.error(msg)
   }
-
-  function callStack() {
-    var stack = _getStackTrace()
-    Logger.log("Debug", "--------------------------")
-    Logger.log("Debug", "Current call stack")
-    // Split the stack into lines and log each one
-    var stackLines = stack.split('\n')
-    for (var i = 0; i < stackLines.length; i++) {
-      var line = stackLines[i].trim() // Remove leading/trailing whitespace
-      if (line.length > 0) {
-        // Only log non-empty lines
-        Logger.log("Debug", `- ${line}`)
-      }
-    }
-    Logger.log("Debug", "--------------------------")
-  }
 }

Commons/Settings.qml

@@ -89,16 +89,23 @@ Singleton {
       reload()
     }
     onLoaded: function () {
-      if (!isLoaded) {
-        Logger.log("Settings", "----------------------------")
-        Logger.log("Settings", "Settings loaded successfully")
-        isLoaded = true
+      Qt.callLater(function () {
+        // Some stuff like wallpaper setup and settings validation should just be executed once on startup
+        // And not on every reload
+        if (!isLoaded) {
+          Logger.log("Settings", "JSON completed loading")
+          if (adapter.wallpaper.current !== "") {
+            Logger.log("Settings", "Set current wallpaper", adapter.wallpaper.current)
+            WallpaperService.setCurrentWallpaper(adapter.wallpaper.current, true)
+          }
 
-        Qt.callLater(function () {
-          // Some stuff like settings validation should just be executed once on startup and not on every reload
+          // Validate monitor configurations, only once
+          // if none of the configured monitors exist, clear the lists
           validateMonitorConfigurations()
-        })
-      }
+
+          isLoaded = true
+        }
+      })
     }
     onLoadFailed: function (error) {
       if (error.toString().includes("No such file") || error === 2)
@@ -164,13 +171,22 @@ Singleton {
       // wallpaper
       property JsonObject wallpaper: JsonObject {
         property string directory: "/usr/share/wallpapers"
-        property bool enableMultiMonitorDirectories: false
-        property bool setWallpaperOnAllMonitors: true
-        property bool randomEnabled: false
-        property int randomIntervalSec: 300 // 5 min
-        property int transitionDuration: 1500 // 1500 ms
-        property string transitionType: "fade"
-        property list<var> monitors: []
+        property string current: ""
+        property bool isRandom: false
+        property int randomInterval: 300
+        property JsonObject swww
+
+        onDirectoryChanged: WallpaperService.listWallpapers()
+        onIsRandomChanged: WallpaperService.toggleRandomWallpaper()
+        onRandomIntervalChanged: WallpaperService.restartRandomWallpaperTimer()
+
+        swww: JsonObject {
+          property bool enabled: false
+          property string resizeMethod: "crop"
+          property int transitionFps: 60
+          property string transitionType: "random"
+          property real transitionDuration: 1.1
+        }
       }
 
       // applauncher
@@ -218,10 +234,19 @@ Singleton {
         property string fontDefault: "Roboto" // Default font for all text
         property string fontFixed: "DejaVu Sans Mono" // Fixed width font for terminal
         property string fontBillboard: "Inter" // Large bold font for clocks and prominent displays
-        property list<var> monitorsScaling: []
+
+        // Legacy compatibility
+        property string fontFamily: fontDefault // Keep for backward compatibility
+
+        // Idle inhibitor state
         property bool idleInhibitorEnabled: false
       }
 
+      // Scaling (not stored inside JsonObject, or it crashes)
+      property var monitorsScaling: {
+
+      }
+
       // brightness
       property JsonObject brightness: JsonObject {
         property int brightnessStep: 5