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/config/app.js

@@ -2,13 +2,13 @@
 export const APP_CONFIG = {
   // 应用基础路径
   basePath: import.meta.env.VITE_APP_BASE_URL || (import.meta.env.DEV ? '/admin/' : '/web/admin/'),
-  
+
   // 应用标题
   title: import.meta.env.VITE_APP_TITLE || 'Claude Relay Service - 管理后台',
-  
+
   // 是否为开发环境
   isDev: import.meta.env.DEV,
-  
+
   // API 前缀
   apiPrefix: import.meta.env.DEV ? '/webapi' : ''
 }
@@ -25,4 +25,4 @@ export function getAppUrl(path = '') {
 // 获取登录页面URL
 export function getLoginUrl() {
   return getAppUrl('/login')
-}
+}