fix: remove desktop translucency to reduce macOS compositing cost

packages/ui/src/lib/desktop.ts

@@ -147,8 +147,6 @@ export type DesktopSettings = {
   skillCatalogs?: SkillCatalogConfig[];
   // Opt-in to send anonymous usage reports for update checks (default: true)
   reportUsage?: boolean;
-  // macOS window vibrancy effect (default: true)
-  desktopVibrancy?: boolean;
 };
 
 type TauriGlobal = {
@@ -639,18 +637,3 @@ export const clearDesktopCache = async (): Promise<boolean> => {
     return false;
   }
 };
-
-export const desktopSetVibrancy = async (enabled: boolean): Promise<boolean> => {
-  if (!isTauriShell()) {
-    return false;
-  }
-
-  try {
-    const tauri = (window as unknown as { __TAURI__?: TauriGlobal }).__TAURI__;
-    await tauri?.core?.invoke?.('desktop_set_vibrancy', { enabled });
-    return true;
-  } catch (error) {
-    console.warn('Failed to set vibrancy', error);
-    return false;
-  }
-};