chore: update iconfont files

src/components/icon-font/iconfont/iconfont.css

@@ -1,8 +1,8 @@
 @font-face {
   font-family: iconfont; /* Project id 4613488 */
-  src: url('iconfont.woff2?t=1746695264114') format('woff2'),
-       url('iconfont.woff?t=1746695264114') format('woff'),
-       url('iconfont.ttf?t=1746695264114') format('truetype');
+  src: url('iconfont.woff2?t=1747231573342') format('woff2'),
+       url('iconfont.woff?t=1747231573342') format('woff'),
+       url('iconfont.ttf?t=1747231573342') format('truetype');
 }
 
 .iconfont {
@@ -13,6 +13,10 @@
   -moz-osx-font-smoothing: grayscale;
 }
 
+.icon-dark_theme::before {
+  content: "\e646";
+}
+
 .icon-theme-auto-1::before {
   content: "\e660";
 }