Fix: close notification center after clicking action buttons (#2276)

* Close notification center after clicking action buttons

When clicking action buttons (e.g., "View", "Activate") in the
notification center, the action fires but the popout stays open. Since
the center is a layer-shell surface, it blocks focus changes on Wayland
compositors like niri, making the action appear to do nothing.

The keyboard navigation path already closes the center after invoking
actions; this brings the mouse click path in line.

Also fix closeNotificationCenter() in PopoutService to set
notificationHistoryVisible = false (matching PopoutManager._closePopout)
instead of calling close() directly, which left the visibility property
stale and caused the bell toggle to require two presses to reopen.

Fixes #2178

* Sync notificationHistoryVisible with shouldBeVisible

NotificationCenterPopout has its own notificationHistoryVisible property
that drives open/close, but the PopoutService public API (open, close,
toggle) calls DankPopout methods directly, bypassing that property. This
leaves notificationHistoryVisible stale, causing the bell toggle to
require two presses to reopen after a programmatic close.

Sync the property from onShouldBeVisibleChanged so any caller going
through open()/close() gets the state corrected automatically.

quickshell/Modules/Notifications/Center/NotificationCard.qml

@@ -674,8 +674,10 @@ Rectangle {
                                                     onEntered: parent.isHovered = true
                                                     onExited: parent.isHovered = false
                                                     onClicked: {
-                                                        if (modelData && modelData.invoke)
+                                                        if (modelData && modelData.invoke) {
                                                             modelData.invoke();
+                                                            PopoutService.closeNotificationCenter();
+                                                        }
                                                     }
                                                 }
                                             }
@@ -813,6 +815,7 @@ Rectangle {
                     onClicked: {
                         if (modelData && modelData.invoke) {
                             modelData.invoke();
+                            PopoutService.closeNotificationCenter();
                         }
                     }
                 }

quickshell/Modules/Notifications/Center/NotificationCenterPopout.qml

@@ -97,6 +97,8 @@ DankPopout {
     onDprChanged: updateStablePopupHeight()
 
     onShouldBeVisibleChanged: {
+        notificationHistoryVisible = shouldBeVisible;
+
         if (shouldBeVisible) {
             NotificationService.onOverlayOpen();
             updateStablePopupHeight();