feat: Improve Chat UI

Move send and compress button to right bottom corner

UIControls/qml/QoABusyOverlay.qml

@@ -0,0 +1,43 @@
+// Copyright (C) 2024-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import QtQuick
+import QtQuick.Controls
+
+Rectangle {
+    id: root
+
+    property alias text: label.text
+    property bool active: false
+
+    visible: active
+    color: Qt.rgba(palette.window.r, palette.window.g, palette.window.b, 0.75)
+
+    MouseArea {
+        anchors.fill: parent
+        acceptedButtons: Qt.AllButtons
+        hoverEnabled: true
+        preventStealing: true
+        onWheel: function(wheel) { wheel.accepted = true }
+    }
+
+    Column {
+        anchors.centerIn: parent
+        spacing: 10
+
+        BusyIndicator {
+            anchors.horizontalCenter: parent.horizontalCenter
+            running: root.active
+            implicitWidth: 36
+            implicitHeight: 36
+        }
+
+        Text {
+            id: label
+
+            anchors.horizontalCenter: parent.horizontalCenter
+            color: palette.text
+            font.pixelSize: 13
+        }
+    }
+}