lock: add completed guard in fade to dpms window

related #2885

flake.lock

@@ -3,11 +3,11 @@
     "dank-qml-common": {
       "flake": false,
       "locked": {
-        "lastModified": 1784647395,
-        "narHash": "sha256-kcLSJC8XBzmWoSBc90Zn81qrNsqWMkwQ1m/zZixOw30=",
+        "lastModified": 1784916690,
+        "narHash": "sha256-KZQjJRLRecUHSY8leyW+bWozsrpqKA9wzkQaL/TkYT0=",
         "owner": "AvengeMedia",
         "repo": "dank-qml-common",
-        "rev": "1919595f0dde4f5bf5ac0baa1902ff6d070971d5",
+        "rev": "9cc787912db7886051ce2b23bfd82a832d13c009",
         "type": "github"
       },
       "original": {

quickshell/Modules/Lock/FadeToDpmsWindow.qml

@@ -10,6 +10,7 @@ PanelWindow {
     id: root
 
     property bool active: false
+    property bool _completed: false
 
     signal fadeCompleted
     signal fadeCancelled
@@ -36,7 +37,8 @@ PanelWindow {
         opacity: 0
 
         onOpacityChanged: {
-            if (opacity >= 0.99 && root.active) {
+            if (opacity >= 0.99 && root.active && !root._completed) {
+                root._completed = true;
                 root.fadeCompleted();
             }
         }
@@ -59,6 +61,7 @@ PanelWindow {
     function startFade() {
         if (!SettingsData.fadeToDpmsEnabled)
             return;
+        _completed = false;
         active = true;
         fadeOverlay.opacity = 0.0;
         fadeSeq.stop();
@@ -74,6 +77,7 @@ PanelWindow {
         fadeSeq.stop();
         fadeOverlay.opacity = 0.0;
         active = false;
+        _completed = false;
     }
 
     Connections {

quickshell/Modules/Lock/LockScreenContent.qml

@@ -113,6 +113,8 @@ Item {
     }
 
     function sendLockerReadyOnce() {
+        if (root.demoMode)
+            return;
         if (lockerReadySent)
             return;
         if (root.unlocking)