feat: declare inhibitor process as singleton to synchronize multi display bars

src/provider/Inhibitor.qml

@@ -0,0 +1,17 @@
+pragma Singleton
+
+import Quickshell.Io
+import Quickshell
+
+Singleton {
+    id: inhibitor
+    property var toggle: () => {
+        active = !active;
+    }
+    property bool active: false
+
+    Process {
+        running: inhibitor.active
+        command: ["systemd-inhibit", "sleep", "infinity"]
+    }
+}

src/widgets/caffeine/Caffeine.qml

@@ -1,12 +1,12 @@
 import "root:base"
+import "root:provider"
+
 import QtQuick
-import Quickshell.Io
 import Quickshell.Widgets
 import Quickshell
 
 BRectangle {
     id: caffeine
-    property bool inhibiting: false
 
     MouseArea {
         anchors.fill: parent
@@ -14,17 +14,9 @@ BRectangle {
         IconImage {
             anchors.fill: parent
             anchors.margins: 4
-            source: caffeine.inhibiting ? "root:assets/eye-open.svg" : "root:assets/eye-closed.svg"
+            source: Inhibitor.active ? "root:assets/eye-open.svg" : "root:assets/eye-closed.svg"
         }
 
-        onClicked: () => {
+        onClicked: () => Inhibitor.toggle()
-            caffeine.inhibiting = !caffeine.inhibiting;
-        }
-
-        Process {
-            id: inhibitor
-            running: caffeine.inhibiting
-            command: ["systemd-inhibit", "sleep", "infinity"]
-        }
     }
 }