Advance Wayland and KDE package bring-up

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/kde/kf6-kwindowsystem/source/src/kwindoweffects.h

@@ -0,0 +1,102 @@
+/*
+    SPDX-FileCopyrightText: 2009 Marco Martin <notmart@gmail.com>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+#ifndef KWINDOWEFFECTS_H
+#define KWINDOWEFFECTS_H
+
+#include "kwindowsystem_export.h"
+#include <optional>
+
+#include <QWidgetList> // for WId, etc.
+
+#include <QColor>
+#include <QRegion>
+
+/**
+ * Namespace for common standardized window effects
+ */
+namespace KWindowEffects
+{
+enum Effect {
+    Slide = 1,
+    BlurBehind = 7,
+    BackgroundContrast = 9,
+};
+
+enum SlideFromLocation {
+    NoEdge = 0,
+    TopEdge,
+    RightEdge,
+    BottomEdge,
+    LeftEdge,
+};
+/**
+ * @return if an atom property is available
+ *
+ * @param effect the effect we want to check
+ */
+KWINDOWSYSTEM_EXPORT bool isEffectAvailable(Effect effect);
+
+/**
+ * Instructs the window manager to blur the background
+ * in the specified region behind the given window.
+ * The given region will overwrite any previous blur-behind region.
+ * Passing a null region will enable the blur effect for the whole window.
+ * The region is relative to the top-left corner of the client area.
+ *
+ * If @a enable is @c false, blur will be disabled for the whole window
+ * (@a region is ignored).
+ *
+ * Note that you will usually want to set the region to the shape of the window,
+ * excluding any shadow or halo.
+ *
+ * @param window The window for which to enable the blur effect
+ * @param enable Enable the effect if @c true, disable it if @c false
+ * @param region The region within the window where the background will be blurred, specified in logical pixels
+ *
+ * @since 5.82
+ */
+KWINDOWSYSTEM_EXPORT void enableBlurBehind(QWindow *window, bool enable = true, const QRegion &region = QRegion());
+
+/**
+ * Instructs the window manager to modify the color of the background
+ * in the specified region behind the given window,
+ * in order to improve the contrast and readability of any text
+ * in the translucent window.
+ * The given region will overwrite any previous backgroundcontrast region.
+ * Passing a null region will enable the blur effect for the whole window.
+ * The region is relative to the top-left corner of the client area.
+ *
+ * If @a enable is @c false, blur will be disabled for the whole window
+ * (@a region is ignored).
+ *
+ * Note that you will usually want to set the region to the shape of the window,
+ * excluding any shadow or halo.
+ *
+ * @param window The window for which to enable the background contrast effect
+ * @param enable Enable the effect if @c true, disable it if @c false
+ * @param brightness How to modify the area brightness: from 0 (make it black) to 2 (make it white), 1 leaves it unchanged
+ * @param region The region within the window where the background will be modified, specified in logical pixels
+ *
+ * @since 5.82
+ */
+KWINDOWSYSTEM_EXPORT void
+enableBackgroundContrast(QWindow *window, bool enable = true, qreal contrast = 1, qreal intensity = 1, qreal saturation = 1, const QRegion &region = QRegion());
+
+/**
+ * Mark a window as sliding from screen edge
+ *
+ * @param id of the window on which we want to apply the effect
+ * @param location edge of the screen from which we want the sliding effect.
+ *               Desktop and Floating won't have effect.
+ * @param offset distance in pixels from the screen edge defined by location
+ *
+ * @since 5.82
+ */
+KWINDOWSYSTEM_EXPORT void slideWindow(QWindow *window, SlideFromLocation location, int offset = -1);
+}
+
+#endif