feat: register backend objects in QML and build UI shell

- Register NvidiaDetector, NvidiaInstaller, NvidiaUpdater as
  QML context properties in main.cpp
- Build Main.qml with sidebar navigation + StackLayout
- Implement SidebarMenu component with page switching
- Build DriverPage with GPU info, driver install/remove/update
  buttons, Secure Boot warning, and status log panel

Author: Sopwit

src/main.cpp

@@ -1,7 +1,8 @@
-#include <QApplication>
-#include <QQmlApplicationEngine>
-#include <QQmlContext>
-#include <QIcon>
+#include <QApplication>\n#include <QQmlApplicationEngine>\n#include <QQmlContext>\n#include <QIcon>
+
+#include "backend/nvidia/detector.h"
+#include "backend/nvidia/installer.h"
+#include "backend/nvidia/updater.h"
 
 int main(int argc, char *argv[])
 {
@@ -16,13 +17,22 @@ int main(int argc, char *argv[])
     app.setOrganizationDomain("github.com/Acik-Kaynak-Gelistirme-Toplulugu");
     app.setWindowIcon(QIcon::fromTheme("ro-control"));
 
+    // Backend nesneleri
+    NvidiaDetector detector;
+    NvidiaInstaller installer;
+    NvidiaUpdater updater;
+
     // QML motorunu başlat
     QQmlApplicationEngine engine;
 
+    // Backend'i QML'e aç
+    engine.rootContext()->setContextProperty("nvidiaDetector", &detector);
+    engine.rootContext()->setContextProperty("nvidiaInstaller", &installer);
+    engine.rootContext()->setContextProperty("nvidiaUpdater", &updater);
+
     // Ana QML dosyasını yükle
     using namespace Qt::StringLiterals;
     const QUrl url(u"qrc:/rocontrol/src/qml/Main.qml"_s);
-    
 
     // QML yüklenemezse uygulamayı kapat
     QObject::connect(

src/qml/Main.qml

@@ -1,17 +1,34 @@
 import QtQuick
 import QtQuick.Controls
+import QtQuick.Layouts
 
-// Ana pencere — ilerleyen branch'lerde sidebar + sayfa navigasyonu eklenecek
 ApplicationWindow {
     id: root
     visible: true
-    width: 900
-    height: 600
+    width: 1000
+    height: 650
+    minimumWidth: 800
+    minimumHeight: 500
     title: "ro-Control"
+    color: "#11111b"
 
-    Text {
-        anchors.centerIn: parent
-        text: "ro-Control — cmake-setup ✓"
-        font.pixelSize: 24
+    Row {
+        anchors.fill: parent
+
+        SidebarMenu {
+            id: sidebar
+            height: parent.height
+        }
+
+        StackLayout {
+            id: stack
+            width: parent.width - sidebar.width
+            height: parent.height
+            currentIndex: sidebar.currentIndex
+
+            DriverPage {}
+            MonitorPage {}
+            SettingsPage {}
+        }
     }
 }

src/qml/components/SidebarMenu.qml

@@ -1,4 +1,96 @@
 import QtQuick
+import QtQuick.Controls
 
-// SidebarMenu — ilerleyen branch'lerde doldurulacak
-Item {}
+Rectangle {
+    id: sidebar
+    width: 220
+    color: "#181825"
+
+    property int currentIndex: 0
+
+    ListModel {
+        id: menuModel
+        ListElement {
+            label: "Sürücü Yönetimi"
+        }
+        ListElement {
+            label: "Sistem İzleme"
+        }
+        ListElement {
+            label: "Ayarlar"
+        }
+    }
+
+    Column {
+        anchors.fill: parent
+        spacing: 0
+
+        // Başlık
+        Item {
+            width: parent.width
+            height: 70
+
+            Label {
+                anchors.centerIn: parent
+                text: "ro-Control"
+                font.pixelSize: 22
+                font.bold: true
+                color: "#cdd6f4"
+            }
+        }
+
+        Rectangle {
+            width: parent.width - 32
+            height: 1
+            anchors.horizontalCenter: parent.horizontalCenter
+            color: "#313244"
+        }
+
+        Item {
+            width: 1
+            height: 12
+        }
+
+        Repeater {
+            model: menuModel
+
+            delegate: Rectangle {
+                id: menuItem
+                required property int index
+                required property string label
+
+                width: sidebar.width - 16
+                height: 44
+                x: 8
+                radius: 8
+                color: sidebar.currentIndex === menuItem.index ? "#313244" : mouseArea.containsMouse ? "#1e1e2e" : "transparent"
+
+                Label {
+                    anchors.verticalCenter: parent.verticalCenter
+                    leftPadding: 16
+                    text: menuItem.label
+                    font.pixelSize: 14
+                    color: sidebar.currentIndex === menuItem.index ? "#89b4fa" : "#a6adc8"
+                }
+
+                MouseArea {
+                    id: mouseArea
+                    anchors.fill: parent
+                    hoverEnabled: true
+                    cursorShape: Qt.PointingHandCursor
+                    onClicked: sidebar.currentIndex = menuItem.index
+                }
+            }
+        }
+    }
+
+    // Versiyon — alt köşe
+    Label {
+        anchors.bottom: parent.bottom
+        anchors.horizontalCenter: parent.horizontalCenter
+        anchors.bottomMargin: 16
+        text: "v" + Qt.application.version
+        font.pixelSize: 11
+        color: "#585b70"
+    }
+}