feat: 1.固定图层缩略图（完成）

2.工具栏新增插槽（完成）
3.loadJSON的元素顺序回发生错误

src/component/Canvas/ExistsImageList/ToolButton.vue

@@ -0,0 +1,131 @@
+<script setup>
+import { computed } from "vue";
+import { useI18n } from "vue-i18n";
+
+const { t } = useI18n();
+
+const props = defineProps({
+  tool: {
+    type: Object,
+    required: true,
+  },
+  activeTool: {
+    type: String,
+    default: "",
+  },
+  canUndo: {
+    type: Boolean,
+    default: true,
+  },
+  canRedo: {
+    type: Boolean,
+    default: true,
+  },
+});
+
+const emit = defineEmits(["click"]);
+
+// 计算按钮是否激活
+const isActive = computed(() => {
+  return (
+    props.tool.id === props.activeTool ||
+    props.tool.id === props.activeTool.toLowerCase() ||
+    props.tool?.activeList?.includes(props.activeTool)
+  );
+});
+
+// 计算按钮是否禁用
+const isDisabled = computed(() => {
+  return (
+    (props.tool.id === "undo" && !props.canUndo) ||
+    (props.tool.id === "redo" && !props.canRedo)
+  );
+});
+
+// 处理按钮点击
+const handleClick = () => {
+  if (isDisabled.value) return;
+  emit("click", props.tool);
+};
+</script>
+
+<template>
+  <div
+    :class="[
+      'tool-btn',
+      tool.class,
+      {
+        active: isActive,
+        disabled: isDisabled,
+      },
+    ]"
+    :style="tool.style"
+    @click="handleClick"
+  >
+    <SvgIcon :name="tool.icon.name" :size="tool.icon.size"></SvgIcon>
+    <div class="tool-tooltip">{{ t(tool.title) }}</div>
+  </div>
+</template>
+
+<style scoped>
+.tool-btn {
+  position: relative;
+  width: 36px;
+  height: 36px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: none;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 16px;
+  color: #333;
+  transition: all 0.2s ease;
+}
+
+.tool-btn:hover {
+  background-color: #f0f0f0;
+}
+
+.tool-btn:hover .tool-tooltip {
+  display: block;
+}
+
+.tool-btn.active {
+  background-color: #e6f7ff;
+  color: #1890ff;
+}
+
+.tool-btn.disabled {
+  cursor: not-allowed;
+  color: #e0e0e0;
+}
+
+.tool-tooltip {
+  display: none;
+  position: absolute;
+  left: 100%;
+  top: 50%;
+  transform: translateY(-50%);
+  background-color: rgba(0, 0, 0, 0.7);
+  color: white;
+  padding: 4px 8px;
+  border-radius: 4px;
+  margin-left: 8px;
+  white-space: nowrap;
+  font-size: 12px;
+  z-index: 10;
+}
+
+.tool-tooltip:before {
+  content: "";
+  position: absolute;
+  top: 50%;
+  right: 100%;
+  margin-top: -5px;
+  border-width: 5px;
+  border-style: solid;
+  border-color: transparent rgba(0, 0, 0, 0.7) transparent transparent;
+}
+</style>