优化玩家端暗金主题资源并清理未引用图片

apps/player/src/components/desktop/DesktopAuthLayout.vue

@@ -114,12 +114,14 @@ withDefaults(
 .auth-card {
   width: 100%;
   max-width: 720px;
-  background: rgba(14, 14, 14, 0.92);
+  background:
+    linear-gradient(rgba(8, 8, 7, 0.18), rgba(8, 8, 7, 0.24)),
+    url('../../assets/images/generated/auth-panel-bg-v1.webp') center / 100% 100% no-repeat;
   backdrop-filter: var(--blur-lg);
   -webkit-backdrop-filter: var(--blur-lg);
-  border: 1px solid rgba(212, 175, 55, 0.28);
-  border-radius: var(--radius-lg);
-  box-shadow: var(--shadow-lg), var(--glow-gold-md);
+  border: 0;
+  border-radius: 0;
+  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.5);
   overflow: hidden;
 }
 
@@ -145,7 +147,7 @@ withDefaults(
   align-items: center;
   justify-content: center;
   padding: var(--space-6) var(--space-5);
-  background: rgba(0, 0, 0, 0.25);
+  background: rgba(0, 0, 0, 0.18);
   border-right: 1px solid rgba(212, 175, 55, 0.15);
 }