add pages and update button

qml/buttons/UpdateBtn.qml

@@ -0,0 +1,34 @@
+import QtQuick
+import QtQuick.Controls
+
+Button {
+  id: root
+  implicitHeight: 44
+  font.pixelSize: 15
+  font.bold: true
+
+  property int packageCount: 0
+  property bool isChecking: false
+  property bool isUpdating: false
+  property bool isInstalling: false
+
+  enabled: !root.isUpdating && !root.isChecking && !root.isInstalling && root.packageCount > 0
+  text: root.isUpdating ? "Обновление..." : root.isChecking ? "Проверка..." : root.packageCount > 0 ? "Обновить систему" : "✓  Всё обновлено"
+
+  background: Rectangle {
+    radius: 1
+    color: !root.enabled ? "#313244" : root.down ? "#6f8fd8" : root.hovered ? "#89b4fa" : "#8CAAEE"
+    border.width: root.visualFocus ? 2 : 0
+    border.color: "#cdd6f4"
+
+    Behavior on color { ColorAnimation { duration: 100 } }
+  }
+
+  contentItem: Text {
+    text: root.text
+    font: root.font
+    color: root.enabled ? "#1e1e2e" : "#585b70"
+    horizontalAlignment: Text.AlignHCenter
+    verticalAlignment: Text.AlignVCenter
+  }
+}