refactor: standardize code formatting and linting configuration

- Replace .eslintrc.js with .eslintrc.cjs for better ES module compatibility
- Add .prettierrc configuration for consistent code formatting
- Update package.json with new lint and format scripts
- Add nodemon.json for development hot reloading configuration
- Standardize code formatting across all JavaScript and Vue files
- Update web admin SPA with improved linting rules and formatting
- Add prettier configuration to web admin SPA

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

web/admin-spa/src/App.vue

@@ -1,7 +1,7 @@
 <template>
   <div id="app">
     <router-view />
-    
+
     <!-- 全局组件 -->
     <ToastNotification ref="toastRef" />
     <ConfirmDialog ref="confirmRef" />
@@ -21,7 +21,7 @@ const confirmRef = ref()
 onMounted(() => {
   // 检查本地存储的认证状态
   authStore.checkAuth()
-  
+
   // 加载OEM设置（包括网站图标）
   authStore.loadOemSettings()
 })
@@ -31,4 +31,4 @@ onMounted(() => {
 #app {
   min-height: 100vh;
 }
-</style>
+</style>