feat: pin button on hover panels — click-transparent pinned mode

modules/HoverPanel.qml

@@ -40,6 +40,17 @@ PanelWindow {
     color: "transparent"
 
     property bool _winVisible: false
+    property bool _pinned: false
+
+    // When pinned, only the pin button area receives input — everything else passes through
+    mask: _pinned ? _pinMask : null
+
+    property Region _pinMask: Region {
+        x: panelContainer.x + panelContainer.width - 28
+        y: 0
+        width: 28
+        height: 28
+    }
 
     WlrLayershell.layer: WlrLayer.Overlay
     WlrLayershell.exclusiveZone: 0
@@ -75,7 +86,7 @@ PanelWindow {
         interval: 400
         onTriggered: {
             root._grace = false;
-            if (!root.showPanel)
+            if (!root.showPanel && !root._pinned)
                 root.dismiss();
         }
     }
@@ -90,6 +101,7 @@ PanelWindow {
     }
 
     function dismiss() {
+        _pinned = false;
         showAnim.stop();
         hideAnim.start();
         _grace = false;
@@ -102,7 +114,7 @@ PanelWindow {
     Timer {
         id: _hideTimer
         interval: 150
-        onTriggered: if (!root.showPanel && !root._grace)
+        onTriggered: if (!root.showPanel && !root._grace && !root._pinned)
             root.dismiss()
     }
 
@@ -195,11 +207,55 @@ PanelWindow {
             width: root.contentWidth
 
             HoverHandler {
-                enabled: !root.popupMode
+                enabled: !root.popupMode && !root._pinned
-                onHoveredChanged: if (!root.popupMode)
+                onHoveredChanged: if (!root.popupMode && !root._pinned)
                     root.panelHovered = hovered
             }
         }
+
+        // Pin button — top-right corner, hover mode only
+        Item {
+            visible: !root.popupMode
+            x: parent.width - width - 4
+            y: 4
+            width: 20
+            height: 20
+            z: 2
+            opacity: pinHover.hovered || root._pinned ? 1 : 0.35
+
+            Behavior on opacity {
+                NumberAnimation {
+                    duration: 100
+                }
+            }
+
+            HoverHandler {
+                id: pinHover
+            }
+
+            TapHandler {
+                cursorShape: Qt.PointingHandCursor
+                onTapped: {
+                    root._pinned = !root._pinned;
+                    if (!root._pinned && !root.showPanel)
+                        root.dismiss();
+                }
+            }
+
+            Text {
+                anchors.centerIn: parent
+                text: "\uEB3F"
+                color: root._pinned ? root.accentColor : M.Theme.base04
+                font.pixelSize: M.Theme.fontSize - 1
+                font.family: M.Theme.iconFontFamily
+
+                Behavior on color {
+                    ColorAnimation {
+                        duration: 100
+                    }
+                }
+            }
+        }
     }
 
     // Border overlay — on top of content so full-bleed items don't cover it