Initial project setup with Next.js accounts manager

- Set up Next.js project structure
- Added UI components and styling
- Configured package dependencies
- Added feature documentation

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

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

components/accounts/index.ts

@@ -0,0 +1,7 @@
+// 导出所有账户相关组件
+export { StatsCards } from './stats-cards';
+export { AccountFilters } from './account-filters';
+export { BatchOperations } from './batch-operations';
+export { AccountUpload } from './account-upload';
+export { AccountTable } from './account-table';
+export { AccountDetails } from './account-details';