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/KeybindsModal.qml

@@ -1,7 +1,6 @@
 import QtQml
 import QtQuick
 import QtQuick.Layouts
-import Quickshell.Hyprland
 import qs.Common
 import qs.Modals.Common
 import qs.Services
@@ -29,11 +28,6 @@ DankModal {
             KeybindsService.loadCheatsheet();
     }
 
-    HyprlandFocusGrab {
-        windows: [root.contentWindow]
-        active: root.useHyprlandFocusGrab && root.shouldHaveFocus
-    }
-
     function scrollDown() {
         if (!root.activeFlickable)
             return;