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/BluetoothPairingModal.qml

@@ -1,5 +1,4 @@
 import QtQuick
-import Quickshell.Hyprland
 import qs.Common
 import qs.Modals.Common
 import qs.Services
@@ -11,11 +10,6 @@ DankModal {
 
     layerNamespace: "dms:bluetooth-pairing"
 
-    HyprlandFocusGrab {
-        windows: [root.contentWindow]
-        active: root.useHyprlandFocusGrab && root.shouldHaveFocus
-    }
-
     property string deviceName: ""
     property string deviceAddress: ""
     property string requestType: ""