🧹 清理重复配置文件

- 删除根目录中重复的 NestJS 配置文件
- 删除 tsconfig.json, tsconfig.build.json, eslint.config.mjs, .prettierrc
- 保留 wwjcloud-nest/ 目录中的完整配置
- 避免配置冲突，确保项目结构清晰

admin-vben/src/layout/admin_simplicity/index.vue

@@ -0,0 +1,41 @@
+<template>
+    <div class="flex w-full h-screen">
+        <el-container>
+            <!-- 顶部 -->
+            <el-header>
+                <layout-header></layout-header>
+            </el-header>
+            <!-- 顶部 end -->
+            <el-container :style="{height:'calc(100vh - 64px)'}">
+                <!-- 左侧边栏 -->
+                <layout-aside></layout-aside>
+                <!-- 左侧边栏 end -->
+                <!-- 主体 -->
+                <el-main class="h-full p-0 bg-page">
+                    <el-scrollbar>
+                        <div class="p-[15px]">
+                            <router-view v-slot="{ Component, route }" v-if="appStore.routeRefreshTag">
+                                <keep-alive :include="tabbarStore.tabNames">
+                                    <component :is="Component" :key="route.fullPath" />
+                                </keep-alive>
+                            </router-view>
+                        </div>
+                    </el-scrollbar>
+                </el-main>
+                    <!-- 主体 end -->
+            </el-container>
+        </el-container>
+    </div> 
+</template>
+
+<script lang="ts" setup>
+import layoutHeader from './components/header/index.vue'
+import layoutAside from './components/aside/index.vue'
+import useAppStore from '@/stores/modules/app'
+import useTabbarStore from '@/stores/modules/tabbar'
+
+const appStore = useAppStore()
+const tabbarStore = useTabbarStore()
+</script>
+
+<style lang="scss" scoped></style>