fix: improve theme compatibility for bluetooth label

Changed QLabel to DLabel for better theme integration and added dynamic
text color handling
Added DPaletteHelper and DGuiApplicationHelper includes for theme
management
Implemented theme change handler to update text color when system theme
changes
Adjusted text alpha values from 0.75 to 0.6 for better readability
across themes
Modified bottom margin from 2 to 6 for better spacing

These changes ensure consistent text appearance in both light and dark
themes
and improve the overall visual experience in the bluetooth dock plugin

fix: 改进蓝牙标签的主题兼容性

将 QLabel 改为 DLabel 以实现更好的主题集成并添加动态文本颜色处理
添加 DPaletteHelper 和 DGuiApplicationHelper 包含以进行主题管理
实现主题变更处理程序，在系统主题更改时更新文本颜色
将文本透明度值从 0.75 调整为 0.6，以在不同主题下获得更好的可读性
将底部边距从 2 修改为 6 以获得更好的间距

这些更改确保在浅色和深色主题下文本外观一致
并改善蓝牙坞站插件的整体视觉体验
Pms: BUG-332553

Author: wjyrich

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

@@ -16,6 +16,8 @@
 #include <DSwitchButton>
 #include <DListView>
 #include <DSpinner>
+#include <DPaletteHelper>
+#include <DGuiApplicationHelper>
 
 #include <QBoxLayout>
 #include <QStandardItemModel>
@@ -68,7 +70,7 @@ BluetoothAdapterItem::BluetoothAdapterItem(Adapter *adapter, QWidget *parent)
     , m_adapterLayout(new QVBoxLayout)
     , m_adapterStateBtn(new DSwitchButton(this))
     , m_myDeviceWidget(new QWidget(this))
-    , m_myDeviceLabel(new QLabel(tr("My Devices"), this))
+    , m_myDeviceLabel(new DLabel(tr("My Devices"), this))
     , m_myDeviceListView(new PluginListView(this))
     , m_myDeviceModel(new QStandardItemModel(m_myDeviceListView))
     , m_otherDeviceControlWidget(new DeviceControlWidget(this))
@@ -361,8 +363,9 @@ void BluetoothAdapterItem::initUi()
     QVBoxLayout *myDeviceLayout = new QVBoxLayout(m_myDeviceWidget);
     myDeviceLayout->setSpacing(0);
     myDeviceLayout->setContentsMargins(0, 0, 0, 0);
-    m_myDeviceLabel->setContentsMargins(10, 0, 0, 2);
+    m_myDeviceLabel->setContentsMargins(10, 0, 0, 6);
     DFontSizeManager::instance()->bind(m_myDeviceLabel, DFontSizeManager::T10);
+    updateMyDeviceLabelTheme();
     myDeviceLayout->addWidget(m_myDeviceLabel);
     myDeviceLayout->addWidget(m_myDeviceListView);
 
@@ -462,6 +465,10 @@ void BluetoothAdapterItem::initConnect()
     connect(m_otherDeviceControlWidget, &DeviceControlWidget::clicked, this, [this] {
         m_autoFold = false;
     });
+    connect(DGuiApplicationHelper::instance(), &DGuiApplicationHelper::themeTypeChanged, this, [this]{
+        updateMyDeviceLabelTheme();
+        update();
+    });
 }
 
 void BluetoothAdapterItem::setUnnamedDevicesVisible(bool isShow)
@@ -536,3 +543,17 @@ void BluetoothAdapterItem::hideEvent(QHideEvent *event)
         m_otherDeviceControlWidget->setExpandState(false);
     QWidget::hideEvent(event);
 }
+
+void BluetoothAdapterItem::updateMyDeviceLabelTheme()
+{
+    DPalette palette = DPaletteHelper::instance()->palette(m_myDeviceLabel);
+    QColor textColor;
+    if (DGuiApplicationHelper::instance()->themeType() == DGuiApplicationHelper::LightType) {
+        textColor = Qt::black;
+    } else {
+        textColor = Qt::white;
+    }
+    textColor.setAlphaF(0.60);
+    palette.setColor(QPalette::WindowText, textColor);
+    DPaletteHelper::instance()->setPalette(m_myDeviceLabel, palette);
+}

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

@@ -110,7 +110,7 @@ class DeviceControlWidget : public QPushButton
         // 绘制文字
         QRect textRect = rect().marginsRemoved(QMargins(10, 0, 0, 0));
         QColor textNomal = palette().brightText().color();
-        textNomal.setAlphaF(0.75);
+        textNomal.setAlphaF(0.6);
         QColor textColor = underMouse() ? palette().color(QPalette::HighlightedText) : textNomal;
         painter.setPen(textColor);
         auto pFont = painter.font();
@@ -180,13 +180,14 @@ public slots:
     void initUi();
     void initConnect();
     void setUnnamedDevicesVisible(bool isShow);
+    void updateMyDeviceLabelTheme();
 
     Adapter *m_adapter;
     SettingLabel *m_adapterLabel;
     QVBoxLayout *m_adapterLayout;
     DSwitchButton *m_adapterStateBtn;
     QWidget *m_myDeviceWidget;
-    QLabel *m_myDeviceLabel;
+    DLabel *m_myDeviceLabel;
     PluginListView *m_myDeviceListView;
     QStandardItemModel *m_myDeviceModel;