feat: 优化主题配色

packages/app/src/pages/admin/studio.vue

@@ -268,11 +268,6 @@ onMounted(fetchStudioInfo)
   animation: shimmer 1.4s infinite;
 }
 
-@keyframes shimmer {
-  0% { background-position: 100% 0; }
-  100% { background-position: -100% 0; }
-}
-
 /* ── Banner preview ──────────────────────── */
 .banner-preview {
   height: 260rpx;
@@ -303,7 +298,7 @@ onMounted(fetchStudioInfo)
 .banner-logo-placeholder {
   width: 100%;
   height: 100%;
-  background: #c9a87c;
+  background: $primary-dark;
   display: flex;
   align-items: center;
   justify-content: center;
@@ -398,7 +393,7 @@ onMounted(fetchStudioInfo)
 .save-btn-text {
   font-size: 32rpx;
   font-weight: 700;
-  color: #c9a87c;
+  color: $primary-dark;
   letter-spacing: 2rpx;
 }
 </style>