qs: numerous performance optimizations

- ClippingRectangle usages
- Asynchronous loader usages
- Replace cava visualizers with shaders

quickshell/Modules/DankDash/DankDashPopout.qml

@@ -411,6 +411,7 @@ DankPopout {
                         anchors.fill: parent
                         active: root.currentTabId === "media"
                         visible: active
+                        asynchronous: true
                         sourceComponent: Component {
                             MediaPlayerTab {
                                 targetScreen: root.screen
@@ -462,7 +463,7 @@ DankPopout {
                     DankSpinner {
                         anchors.centerIn: parent
                         size: 40
-                        visible: wallpaperLoader.active && wallpaperLoader.status === Loader.Loading
+                        visible: (wallpaperLoader.active && wallpaperLoader.status === Loader.Loading) || (mediaLoader.active && mediaLoader.status === Loader.Loading) || (weatherLoader.active && weatherLoader.status === Loader.Loading)
                     }
 
                     Loader {
@@ -470,6 +471,7 @@ DankPopout {
                         anchors.fill: parent
                         active: root.currentTabId === "weather"
                         visible: active
+                        asynchronous: true
                         sourceComponent: Component {
                             WeatherTab {}
                         }