fix: force noTitlebar sync apply, restore queued connection for scheduleApply

noTitlebar requires immediate sync apply because the treeland
protocol currently lacks configure event support. Restore
Qt::QueuedConnection to prevent staleness from stack variable
scenarios.

Log: noTitlebar强制同步提交，scheduleApply恢复异步调度
Influence: noTitlebar属性直接同步更新到wayland；其他属性恢复异步合并调度

Author: 18202781743

src/plugins/platform/treeland/dtreelandplatformwindowinterface.cpp

@@ -306,7 +306,12 @@ PersonalizationWindowContext *DTreeLandPlatformWindowHelper::windowContext() con
 
 void DTreeLandPlatformWindowHelper::setEnabledNoTitlebar(bool enable)
 {
-    updateFeature(m_noTitlebar, enable, NoTitlebar);
+    if (m_noTitlebar == enable)
+        return;
+    m_noTitlebar = enable;
+    m_initialized |= NoTitlebar;
+    m_dirty |= NoTitlebar;
+    applyPending();
 }
 
 void DTreeLandPlatformWindowHelper::setWindowRadius(int windowRadius)
@@ -354,7 +359,7 @@ void DTreeLandPlatformWindowHelper::scheduleApply()
     if (m_applyScheduled)
         return;
     m_applyScheduled = true;
-    QMetaObject::invokeMethod(this, &DTreeLandPlatformWindowHelper::applyPending);
+    QMetaObject::invokeMethod(this, &DTreeLandPlatformWindowHelper::applyPending, Qt::QueuedConnection);
 }
 
 void DTreeLandPlatformWindowHelper::applyPending()

src/plugins/platform/treeland/dtreelandplatformwindowinterface.h

@@ -63,6 +63,8 @@ private slots:
 
     template<typename T>
     void updateFeature(T &member, const T &value, Feature flag) {
+        if (member == value)
+            return;
         member = value;
         m_initialized |= flag;
         m_dirty |= flag;