feat(编辑能力): 修复组合复制与编辑状态异常

assets/webui/index.html

@@ -175,6 +175,7 @@
 		</dialog>
 		<dialog id="objectStylePanel" class="form-dialog" aria-label="对象样式">
 			<form id="objectStyleForm">
+				<div class="form-row"><span>组合</span><div class="form-format"><button id="groupObjectsButton" class="button" type="button">组合</button><button id="ungroupObjectButton" class="button" type="button">解组</button></div></div>
 				<div class="form-row"><span>格式</span><div class="form-format"><button id="copyStyleButton" class="button" type="button" aria-label="复制格式">复制</button><button id="pasteStyleButton" class="button" type="button" aria-label="粘贴格式">粘贴</button></div></div>
 				<div class="form-row"><label for="objectOpacity">透明</label><div class="form-unit"><input id="objectOpacity" type="number" min="0" max="100" step="any" aria-label="透明度" autofocus><span>%</span></div></div>
 				<div id="objectStrokeFields">