fix(manager): remove URI maxLength and show URI field on validation errors

[Ibochkarev]

What does it do?

• Removes the maxLength: 255 constraint from the URI field in the resource panel and in the tree quick-create/quick-update form, so long URIs (e.g. with use_alias_path and nested resources) are no longer blocked by client-side validation.
• When the server returns validation errors for the uri field, the panel now reveals the URI field and checks "Freeze URI" so the user sees which field failed.
• When client-side validation fails (e.g. on the URI field), the same reveal logic runs before showing the errored tab.

Why is it needed?

With use_alias_path and nested resources, the generated URI can exceed 255 characters. The form showed a generic "Please correct the errors in your form before submitting." with no indication of the problematic field, because the URI field is hidden by default. Per maintainer feedback (opengeek): the uri column is TEXT and not limited to 191 characters; the index prefix is 191 but does not prevent longer values; there should not be a soft limit in the manager UI. Improving error handling was also requested (Mark-H).

How to test

1. Enable friendly URLs and use_alias_path, with a deep resource tree and long aliases so the generated URI exceeds 255 characters.
2. Edit a resource that would get such a long URI; save. Previously: generic error, no field highlighted. Now: URI field is revealed and the error is shown on it.
3. Optionally trigger a server-side URI error (e.g. duplicate URI); confirm the URI field is revealed and the error is visible.

Related issue(s)/PR(s)

Resolves #13815

[biz87]

Code Review

Summary

Removes client-side maxLength: 255 from the URI field (the uri column is TEXT, not limited to 255) and auto-reveals the hidden URI field when validation errors occur. +30/-3.

Assessment

Correct fix. hasUriError handles both array and object error formats. revealUriField is reused in two scenarios (client-side and server-side validation). The failure override correctly calls superclass.failure.

Verdict

Approve