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/main.js

@@ -20,8 +20,8 @@ app.use(router)
 
 // 使用Element Plus
 app.use(ElementPlus, {
-  locale: zhCn,
+  locale: zhCn
 })
 
 // 挂载应用
-app.mount('#app')
+app.mount('#app')