修复: delElement 缺花括号导致删单个元素时误清空多选态

src/core/store.ts

@@ -639,7 +639,7 @@ function delElement(id: string) {
   const el = findElement(id)
   const deletedElement = el ? clone(el) : undefined
   execOp({ type: 'del_element', slideIdx: state.currentIndex, elementId: id, deletedElement, clientId: CLIENT_ID, timestamp: Date.now() })
-  if (state.selectedId === id) state.selectedId = null; state.selectedIds = []
+  if (state.selectedId === id) { state.selectedId = null; state.selectedIds = [] }
 }
 
 function moveElementZ(id: string, dir: number) {