fix: embedded UI redirect error when behind proxy

[feranwq]

Description

add absolute_redirect off; in /ui location to fix redirect port err

Which issue(s) this PR fixes:

Fixes #12511

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[juzhiyuan]

Hi I notice there are some failing tests

[feranwq]

Hi I notice there are some failing tests

I've reviewed the error and it doesn't appear to be related to my PR. However, I can't be certain whether the err with the pre-existing code or the test itself.

[bzp2010]

Test case needs to be added to verify that the Location response header meets expectations.

[SkyeYoung]

I reran the tests. Also, I agree with @bzp2010 's opinion.

[bzp2010]

Please do not force push after the review has begun; this wastes our time. 🤨

I believe the PR description already clearly explains this matter. If you do not believe this PR is ready for review, please place it in draft status until you have completed it and marked it as ready to review.

[feranwq]

Please do not force push after the review has begun; this wastes our time. 🤨

I believe the PR description already clearly explains this matter. If you do not believe this PR is ready for review, please place it in draft status until you have completed it and marked it as ready to review.

Sorry, I'm used to using rebase to keep the commit history clean. I'll be mindful of this for any future modifications.

[bzp2010]

This project always merges PRs using squash merges, so the commit history isn't very important.

[Baoyuantop]

Hi @feranwq, there's a failed test that needs to be resolved. I haven't identified the specific cause of the issue. Maybe you could merge the master branch and try again?

[feranwq]

Hi @feranwq, there's a failed test that needs to be resolved. I haven't identified the specific cause of the issue. Maybe you could merge the master branch and try again?

It failed again, this time it was an mcp test failure. I've seen similar failures frequently in other pr, please help take a look.

[SkyeYoung]

@feranwq The test for this mcp-bridge often fails. I've rerun it for you.