fix(login): 修复登录成功后路由跳转问题

- 将登录成功后的路由跳转从 '/' 修改为 '/index'
- 添加了测试脚本文件用于API功能验证
- 更新了服务器日志和前端构建输出日志文件

test_login.ps1

@@ -0,0 +1,12 @@
+$body = '{"username":"testuser","password":"test123"}'
+$r = Invoke-WebRequest -Uri 'http://localhost:3001/api/login' -Method POST -ContentType 'application/json' -Body $body
+Write-Host "Status:" $r.StatusCode
+Write-Host "Body:" $r.Content
+
+Write-Host "`n--- /api/config ---"
+$r2 = Invoke-WebRequest -Uri 'http://localhost:3001/api/config' -Method GET
+Write-Host $r2.Content
+
+Write-Host "`n--- /api/server/list ---"
+$r3 = Invoke-WebRequest -Uri 'http://localhost:3001/api/server/list' -Method GET
+Write-Host $r3.Content