feat: Add navigation panel for messages

ChatView/qml/parts/Navigation.qml

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import QtQuick
+import QtQuick.Controls
+import UIControls
+
+Row {
+    id: root
+
+    property alias currentMessageNumber: currentMessageNumber.text
+
+    signal messageUp()
+    signal messageDown()
+
+    spacing: 4
+
+    QoAButton {
+        text: "▲"
+        onClicked: root.messageUp()
+
+        ToolTip.visible: hovered
+        ToolTip.delay: 250
+        ToolTip.text: qsTr("Previous message")
+    }
+
+    QoAButton {
+        text: "▼"
+        onClicked: root.messageDown()
+
+        ToolTip.visible: hovered
+        ToolTip.delay: 250
+        ToolTip.text: qsTr("Next message")
+    }
+
+    Badge {
+        id: currentMessageNumber
+
+        anchors.verticalCenter: parent.verticalCenter
+
+        ToolTip.visible: hovered
+        ToolTip.delay: 250
+        ToolTip.text: qsTr("Current message position")
+    }
+}