quickshell: fix clock click reopening after grabFocus dismiss

Clicking clock while popup open triggered grabFocus dismiss
then immediately reopened. Add justDismissed guard so the
click handler ignores the click that caused the dismiss.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

settings/hyprland.nix

@@ -518,6 +518,7 @@ in
                           MouseArea {
                               anchors.fill: parent
                               onClicked: {
+                                  if (calPopup.justDismissed) return;
                                   if (calPopup.visible) {
                                       calPopup.open = false;
                                       calCloseTimer.start();
@@ -841,6 +842,7 @@ in
                           color: "transparent"
 
                           property bool open: false
+                          property bool justDismissed: false
                           property real fullWidth: calCol.width + 32
                           property real fullHeight: calCol.height + 24
 
@@ -852,9 +854,17 @@ in
                                   open = true;
                               } else {
                                   open = false;
+                                  justDismissed = true;
+                                  dismissGuardTimer.start();
                               }
                           }
 
+                          Timer {
+                              id: dismissGuardTimer
+                              interval: 100
+                              onTriggered: calPopup.justDismissed = false
+                          }
+
                           // Concave corner — left
                           Item {
                               anchors.right: calContent.left