feat: 添加完整的前端管理系统 (VbenAdmin)

- 添加基于 VbenAdmin + Vue3 + Element Plus 的前端管理系统
- 包含完整的 UI 组件库和工具链
- 支持多应用架构 (web-ele, backend-mock, playground)
- 包含完整的开发规范和配置
- 修复 admin 目录的子模块问题，确保正确提交

admin/packages/effects/common-ui/src/ui/authentication/login-expired-modal.vue

@@ -0,0 +1,95 @@
+<script setup lang="ts">
+import type { AuthenticationProps } from './types';
+
+import { computed, watch } from 'vue';
+
+import { $t } from '@vben/locales';
+
+import { useVbenModal } from '@vben-core/popup-ui';
+import { Slot, VbenAvatar } from '@vben-core/shadcn-ui';
+
+interface Props extends AuthenticationProps {
+  avatar?: string;
+  zIndex?: number;
+}
+
+defineOptions({
+  name: 'LoginExpiredModal',
+});
+
+const props = withDefaults(defineProps<Props>(), {
+  avatar: '',
+  zIndex: 0,
+});
+
+const open = defineModel<boolean>('open');
+
+const [Modal, modalApi] = useVbenModal();
+
+watch(
+  () => open.value,
+  (val) => {
+    modalApi.setState({ isOpen: val });
+  },
+);
+
+const getZIndex = computed(() => {
+  return props.zIndex || calcZIndex();
+});
+
+/**
+ * 排除ant-message和loading:9999的z-index
+ */
+const zIndexExcludeClass = ['ant-message', 'loading'];
+function isZIndexExcludeClass(element: Element) {
+  return zIndexExcludeClass.some((className) =>
+    element.classList.contains(className),
+  );
+}
+
+/**
+ * 获取最大的zIndex值
+ */
+function calcZIndex() {
+  let maxZ = 0;
+  const elements = document.querySelectorAll('*');
+  [...elements].forEach((element) => {
+    const style = window.getComputedStyle(element);
+    const zIndex = style.getPropertyValue('z-index');
+    if (
+      zIndex &&
+      !Number.isNaN(Number.parseInt(zIndex)) &&
+      !isZIndexExcludeClass(element)
+    ) {
+      maxZ = Math.max(maxZ, Number.parseInt(zIndex));
+    }
+  });
+  return maxZ + 1;
+}
+</script>
+
+<template>
+  <div>
+    <Modal
+      :closable="false"
+      :close-on-click-modal="false"
+      :close-on-press-escape="false"
+      :footer="false"
+      :fullscreen-button="false"
+      :header="false"
+      :z-index="getZIndex"
+      class="border-none px-10 py-6 text-center shadow-xl sm:w-[600px] sm:rounded-2xl md:h-[unset]"
+    >
+      <VbenAvatar :src="avatar" class="mx-auto mb-6 size-20" />
+      <Slot
+        :show-forget-password="false"
+        :show-register="false"
+        :show-remember-me="false"
+        :sub-title="$t('authentication.loginAgainSubTitle')"
+        :title="$t('authentication.loginAgainTitle')"
+      >
+        <slot> </slot>
+      </Slot>
+    </Modal>
+  </div>
+</template>