remove hoverpanel title, move actions into applets, add qmllint baseline regen script

shell/applets/AppletActionBar.qml

@@ -0,0 +1,31 @@
+import QtQuick
+import "../services" as S
+
+// Action bar for applet-level controls (power toggles, DND, clear-all, etc.)
+// Place at the top of an applet Column. Children are right-aligned action buttons.
+Item {
+    id: root
+
+    default property alias actions: _row.children
+    required property color accentColor
+
+    width: parent?.width ?? 0
+    height: 24
+
+    Row {
+        id: _row
+        anchors.right: parent.right
+        anchors.rightMargin: 4
+        anchors.verticalCenter: parent.verticalCenter
+        spacing: 8
+        layoutDirection: Qt.RightToLeft
+    }
+
+    Rectangle {
+        anchors.left: parent.left
+        anchors.right: parent.right
+        anchors.bottom: parent.bottom
+        height: 1
+        color: S.Theme.base03
+    }
+}