feat(界面设计): 补齐云母Alt命名

assets/webui/index.html

@@ -481,7 +481,7 @@
 								<div class="appearance-choices">
 									<button type="button" data-material-choice="solid"><span class="material-solid-icon"></span><span>纯色</span></button>
 									<button type="button" data-material-choice="acrylic"><span class="material-acrylic-icon"></span><span>亚克力</span></button>
-									<button type="button" data-material-choice="mica"><span class="material-mica-icon"></span><span>云母Alt</span></button>
+									<button type="button" data-material-choice="mica-alt"><span class="material-mica-alt-icon"></span><span>云母Alt</span></button>
 								</div>
 							</div>
 						</section>

assets/webui/ofdgo.css

@@ -5101,7 +5101,7 @@ audio.page-media {
 .theme-light-icon,
 .theme-dark-icon,
 .material-solid-icon,
-.material-mica-icon,
+.material-mica-alt-icon,
 .material-acrylic-icon {
 	display: inline-block;
 	width: 18px;
@@ -5130,7 +5130,7 @@ audio.page-media {
 	--icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='3' width='18' height='18' rx='1'/%3E%3Cpath d='M6 6h12v12H6z' fill='black' fill-opacity='.25' stroke='none'/%3E%3C/svg%3E");
 }
 
-.material-mica-icon {
+.material-mica-alt-icon {
 	--icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='3' width='18' height='18' rx='1'/%3E%3Cpath d='M3 13c6-7 12 7 18-2M3 18c6-7 12 7 18-2'/%3E%3C/svg%3E");
 }