[Bug]: DISABLE_REGISTRATION设为ture，已有账户登录失败

Affected Component

Frontend UI

Bug Description

DISABLE_REGISTRATION设为ture，已有账户登录失败。返回WeKnora 内置的 SearXNG 返回的 404 页面 HTML

Steps to Reproduce

1. .env DISABLE_REGISTRATION设为ture
2. 填写已有账户
3. 点击登录按钮

Expected Behavior

账户登录成功

Actual Behavior

登录失败，返回WeKnora 内置的 SearXNG 返回的 404 页面 HTML

WeKnora Version

v0.8.0

Deployment Method

Docker Compose

Operating System

Ubuntu20.04.6

Relevant Logs

Confirmation

• I have searched existing issues and confirmed this is a new one