style: adjust bluetooth adapter item layout margins

1. Set contents margins to 0 for myDeviceLayout to remove extra spacing
2. Reduced spacing between myDeviceWidget and otherDeviceListView from 5
to 4 pixels
3. These changes improve visual consistency and reduce unnecessary
whitespace
4. Maintains proper spacing while optimizing the UI layout

style: 调整蓝牙适配器项布局边距

1. 将 myDeviceLayout 的内容边距设置为 0 以移除额外间距
2. 将 myDeviceWidget 和 otherDeviceListView 之间的间距从 5 像素减少到 4
像素
3. 这些更改提高了视觉一致性并减少了不必要的空白
4. 在优化 UI 布局的同时保持适当的间距

Pms: BUG-311109

Author: wjyrich

plugins/dde-dock/bluetooth/componments/bluetoothadapteritem.cpp

@@ -360,6 +360,7 @@ void BluetoothAdapterItem::initUi()
     m_myDeviceListView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     QVBoxLayout *myDeviceLayout = new QVBoxLayout(m_myDeviceWidget);
     myDeviceLayout->setSpacing(0);
+    myDeviceLayout->setContentsMargins(0, 0, 0, 0);
     m_myDeviceLabel->setContentsMargins(10, 0, 0, 2);
     DFontSizeManager::instance()->bind(m_myDeviceLabel, DFontSizeManager::T10);
     myDeviceLayout->addWidget(m_myDeviceLabel);
@@ -381,7 +382,7 @@ void BluetoothAdapterItem::initUi()
 
     mainLayout->addLayout(m_adapterLayout);
     mainLayout->addWidget(m_myDeviceWidget);
-    mainLayout->addSpacing(5);
+    mainLayout->addSpacing(4);
     mainLayout->addWidget(m_otherDeviceListView);
     mainLayout->addStretch();