重构组件结构，优化导入路径并移除不必要的组件，新增多个模态框组件以支持部门、角色、权限和用户管理功能

frontend/src/components/modals/BaseModal.vue

@@ -0,0 +1,54 @@
+<template>
+  <div tabindex="-1" aria-hidden="true"
+    class="bg-gray-900/50 hidden overflow-y-auto overflow-x-hidden fixed top-0 right-0 left-0 z-50 justify-center items-center w-full md:inset-0 h-[calc(100%-1rem)] max-h-full">
+    <div class="relative p-4 w-full" :class="[maxWidthClass]">
+      <!-- Modal content -->
+      <div class="relative bg-white rounded-lg shadow">
+        <!-- Modal header -->
+        <div v-if="title" class="flex items-center justify-between p-4 md:p-5 border-b rounded-t border-gray-200">
+          <h3 class="text-base sm:text-lg font-semibold text-gray-900">
+            {{ title }}
+          </h3>
+          <button type="button" @click="closeModal"
+            class="text-gray-400 bg-transparent hover:bg-gray-200 hover:text-gray-900 rounded-lg text-sm w-8 h-8 ms-auto inline-flex justify-center items-center">
+            <svg class="w-3 h-3" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 14 14">
+              <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
+                d="m1 1 6 6m0 0 6 6M7 7l6-6M7 7l-6 6" />
+            </svg>
+            <span class="sr-only">关闭</span>
+          </button>
+        </div>
+        <!-- Modal body -->
+        <slot></slot>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from "vue";
+
+export type ModalSize = "xs" | "sm" | "md" | "lg" | "xl";
+
+const props = defineProps<{
+	/** 模态框标题 */
+	title?: string;
+	/** 模态框大小 */
+	size?: ModalSize;
+	/** 关闭模态框的回调函数 */
+	closeModal: () => void;
+}>();
+
+/** 根据size属性计算最大宽度类名 */
+const maxWidthClass = computed(() => {
+	const sizes: Record<ModalSize, string> = {
+		xs: "max-w-xs",
+		sm: "max-w-sm",
+		md: "max-w-md",
+		lg: "max-w-lg",
+		xl: "max-w-xl",
+	};
+
+	return sizes[props.size || "md"];
+});
+</script>