fix: remove full-screen skin overlay

lib/client.js

@@ -1,4 +1,5 @@
 window.__ModuleLoader__.load({id:"@leon___/dsh-client-liang-intensity-skin",factory:(require)=>{var module={exports:{}};var exports=module.exports;
+"use strict";
 var __defProp = Object.defineProperty;
 var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
 var __getOwnPropNames = Object.getOwnPropertyNames;
@@ -72,15 +73,6 @@ body[data-liang-skin="on"] .liang-skin-backdrop {
   display: none;
 }
 
-.liang-skin-backdrop::after {
-  position: absolute;
-  inset: 0;
-  content: "";
-  background:
-    linear-gradient(90deg, var(--liang-page, transparent) 0 28%, transparent 57% 100%),
-    linear-gradient(var(--liang-bg-base, transparent), var(--liang-bg-base, transparent));
-}
-
 body[data-liang-skin="on"] {
   /* Keep the backdrop above the canvas but below content and native portals.
      The host owns root positioning, dimensions, and its own stacking order. */