feat: add override icon search path for system tray

1. Changed resource prefix from /dsg/built-in-icons to /dsg-icon/
override in application-tray.qrc
2. Added DIconTheme include and modified DCI theme search paths in
trayplugin.cpp
3. Prepended the override path to ensure system icons take precedence
over theme icons
4. This allows system icons to remain consistent regardless of theme
changes

feat: 为系统托盘添加图标覆盖搜索路径

1. 将 application-tray.qrc 中的资源前缀从 /dsg/built-in-icons 改为 /dsg-
icon/override
2. 在 trayplugin.cpp 中添加 DIconTheme 包含并修改 DCI 主题搜索路径
3. 将覆盖路径前置以确保系统图标优先于主题图标
4. 这使得系统图标在不同主题下保持一致性

pms: BUG-332583

Author: mhduiy

plugins/application-tray/application-tray.qrc

@@ -1,5 +1,5 @@
 <RCC>
-    <qresource prefix="/dsg/built-in-icons">
+    <qresource prefix="/dsg-icon/override">
         <file alias="fcitx-anthy.dci">icons/fcitx-anthy.dci</file>
         <file alias="fcitx-bopomofo.dci">icons/fcitx-bopomofo.dci</file>
         <file alias="fcitx-cangjie.dci">icons/fcitx-cangjie.dci</file>

plugins/application-tray/trayplugin.cpp

@@ -11,6 +11,7 @@
 #include "ddeindicatortrayprotocol.h"
 #include "pluginproxyinterface.h"
 
+#include <DIconTheme>
 #include <QDebug>
 
 namespace tray {
@@ -47,6 +48,10 @@ void TrayPlugin::init(PluginProxyInterface *proxyInter)
 {
     m_proyInter = proxyInter;
 
+    auto dciPaths = Dtk::Gui::DIconTheme::dciThemeSearchPaths();
+    dciPaths.prepend(":/dsg-icon/override");
+    Dtk::Gui::DIconTheme::setDciThemeSearchPaths(dciPaths);
+
     auto sniProtocol = new SniTrayProtocol();
     auto xembedProtocol = new XembedProtocol();
     auto indicatorProtocol = new DDEindicatorProtocol();