增加亮色模式支持，小幅修改QSS和UI元素大小

plugin/dtkplugin/spkdtkplugin.cpp

@@ -11,6 +11,10 @@ void SpkDtkPluginImpl::Initialize()
           &DPlatformTheme::activeColorChanged,
           this,
           &SpkDtkPluginImpl::AccentColorChanged);
+  connect(DGuiApplicationHelper::instance(),
+          &DGuiApplicationHelper::themeTypeChanged,
+          this,
+          &SpkDtkPluginImpl::DarkLightThemeChanged);
 }
 
 void SpkDtkPluginImpl::addWindow(QWidget *w, QObject *parent)
@@ -23,3 +27,8 @@ QColor SpkDtkPluginImpl::GetAccentColor()
 {
   return DGuiApplicationHelper::instance()->systemTheme()->activeColor();
 }
+
+bool SpkDtkPluginImpl::GetIsDarkTheme()
+{
+  return DGuiApplicationHelper::instance()->themeType() == DGuiApplicationHelper::DarkType;
+}

plugin/dtkplugin/spkdtkplugin.h

@@ -11,9 +11,11 @@ class SpkDtkPlugin : public QObject
     virtual void Initialize() = 0;
     virtual void addWindow(QWidget* w, QObject* parent) = 0;
     virtual QColor GetAccentColor() = 0;
+    virtual bool GetIsDarkTheme() = 0;
 
   signals:
     void AccentColorChanged(QColor);
+    void DarkLightThemeChanged(bool isDark);
 };
 QT_BEGIN_NAMESPACE
 Q_DECLARE_INTERFACE(SpkDtkPlugin, "org.spark-store.client.dtkplugin")

plugin/dtkplugin/spkdtkplugin_impl.h

@@ -15,4 +15,5 @@ class SpkDtkPluginImpl : public SpkDtkPlugin
     void addWindow(QWidget* w, QObject* parent) override;
     void Initialize() override;
     QColor GetAccentColor() override;
+    bool GetIsDarkTheme() override;
 };