make notifs and page placeholder use new material shapes

dots/.config/quickshell/ii/modules/sidebarLeft/AiChat.qml

@@ -369,6 +369,7 @@ Inline w/ backslash and round brackets \\(e^{i\\pi} + 1 = 0\\)
                 icon: "neurology"
                 title: Translation.tr("Large language models")
                 description: Translation.tr("Type /key to get started with online models\nCtrl+O to expand the sidebar\nCtrl+P to detach sidebar into a window")
+                shape: MaterialShape.Shape.PixelCircle
             }
 
             ScrollToBottomButton {

dots/.config/quickshell/ii/modules/sidebarLeft/Anime.qml

@@ -206,6 +206,7 @@ Item {
                 icon: "bookmark_heart"
                 title: Translation.tr("Anime boorus")
                 description: ""
+                shape: MaterialShape.Shape.Bun
             }
 
             ScrollToBottomButton {

dots/.config/quickshell/ii/modules/sidebarLeft/PagePlaceholder.qml

@@ -7,9 +7,10 @@ Item {
     id: root
 
     property bool shown: true
-    property alias icon: cookieWrappedMaterialSymbol.text
+    property alias icon: shapeWidget.text
     property alias title: widgetNameText.text
     property alias description: widgetDescriptionText.text
+    property alias shape: shapeWidget.shape
 
     opacity: shown ? 1 : 0
     visible: opacity > 0
@@ -27,8 +28,8 @@ Item {
         anchors.centerIn: parent
         spacing: 5
 
-        CookieWrappedMaterialSymbol {
-            id: cookieWrappedMaterialSymbol
+        MaterialShapeWrappedMaterialSymbol {
+            id: shapeWidget
             Layout.alignment: Qt.AlignHCenter
             iconSize: 60
             rotation: -60 * (1 - root.opacity)