fix: use deeplink page to handle login

<!-- DO NOT IGNORE THE TEMPLATE! Thank you for contributing! Before submitting the PR, please make sure you do the following: - Read the [Contributing Guide](https://github.com/antfu/contribute). - Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate. - Provide a description in this PR that addresses **what** the PR is solving, or reference the issue that it solves (e.g. `fixes #123`). - Ideally, include relevant tests that fail without this PR but pass with it. --> ### Description Part of #2 Found there are scheme config, so `/auth` route has some issues, now it also work with the `follow://auth` deep link, but it still not design https://github.com/user-attachments/assets/a3e1a44a-27f4-4e56-a583-7f61a03c2ba1 <!-- Please insert your description here and provide especially info about the "what" this PR is solving --> ### Linked Issues ### Additional context <!-- e.g. is there anything you'd like reviewers to focus on? -->