refactor: remove navigation panel

ChatView/qml/parts/Navigation.qml

@@ -1,61 +0,0 @@
-/*
- * 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")
-    }
-}

ChatView/qml/parts/TopBar.qml

@@ -33,7 +33,6 @@ Rectangle {
     property alias recentPath: recentPathId
     property alias openChatHistory: openChatHistoryId
     property alias pinButton: pinButtonId
-    property alias navigation: navigationId
 
     color: palette.window.hslLightness > 0.5 ?
                Qt.darker(palette.window, 1.1) :
@@ -131,10 +130,6 @@ Rectangle {
             Layout.fillWidth: true
         }
 
-        Navigation {
-            id: navigationId
-        }
-
         Badge {
             id: tokensBadgeId