refactor(framemode): unify connected surface chrome via SDF pipeline

- Shadow system rewrite with SDF quads
- Replace ConnectedShape/layer FBOs w/frame & chrome SDF shaders
- Improve frame blur performance
- Plugin performance gate

quickshell/Modals/NotificationModal.qml

@@ -1,5 +1,4 @@
 import QtQuick
-import Quickshell.Hyprland
 import Quickshell.Io
 import qs.Common
 import qs.Modals.Common
@@ -11,11 +10,6 @@ DankModal {
 
     layerNamespace: "dms:notification-center-modal"
 
-    HyprlandFocusGrab {
-        windows: [notificationModal.contentWindow]
-        active: notificationModal.useHyprlandFocusGrab && notificationModal.shouldHaveFocus
-    }
-
     property bool notificationModalOpen: false
     property var notificationListRef: null
     property var historyListRef: null