refactor: 改用qmake(.pro)构建，兼容Qt 5.9

- 移除CMakeLists.txt，改用AiAnalysis.pro
- 修复Qt 5.9兼容性：QWheelEvent::posF()、QString::SkipEmptyParts、static_cast信号连接
- 更新README为qmake构建说明
- 删除CMake build目录

mainwindow.cpp

@@ -90,7 +90,7 @@ void MainWindow::setupUi()
         "QSpinBox { background: #2a2a3e; color: #fff; border: 1px solid #555; "
         "border-radius: 4px; padding: 4px; font-size: 13px; }"
     );
-    connect(m_displaySpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
+    connect(m_displaySpinBox, static_cast<void(QSpinBox::*)(int)>(&QSpinBox::valueChanged),
             this, &MainWindow::onDisplayPointsChanged);
 
     controlLayout->addWidget(portLabel);
@@ -284,7 +284,7 @@ void MainWindow::onDataReceived(const QByteArray &data)
     if (raw.isEmpty()) return;
 
     // 可能一个UDP包包含多行
-    QStringList lines = raw.split('\n', Qt::SkipEmptyParts);
+    QStringList lines = raw.split('\n', QString::SkipEmptyParts);
     for (const QString &line : lines) {
         processDataLine(line.trimmed());
     }