feat(前端界面): 新增打印按钮

assets/webui/ofdgo.css

@@ -117,6 +117,15 @@ a:focus-visible {
 	clip: rect(0, 0, 0, 0);
 }
 
+.print-frame {
+	position: fixed;
+	top: 0;
+	right: 100%;
+	width: 1px;
+	height: 1px;
+	border: 0;
+}
+
 .button,
 .icon-button {
 	display: inline-flex;