URLcheck: redact password in UI

[huyz]

Sometimes URLs need a password for basic authentication; in these cases, we want to redact the password in the UI

[Copilot]

Pull request overview

This PR updates the URLcheck module UI to avoid displaying Basic Auth passwords by rendering a redacted URL string instead of the raw configured URL.

Changes:

• Render urlResult.DisplayURL() in the URLcheck view instead of the raw Url field.
• Add DisplayURL() helper on urlResult to redact Basic Auth passwords via URL parsing.
• Add unit tests covering redaction behavior across multiple URL forms (no auth, username only, username+password, encoded credentials, invalid URL).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
modules/urlcheck/view.go	Switches template rendering from .Url to .DisplayURL so the UI shows a redacted URL when credentials are present.
modules/urlcheck/urlResult.go	Adds DisplayURL() helper to parse URLs and replace Basic Auth passwords with a placeholder.
modules/urlcheck/urlResult_test.go	Adds focused unit tests validating password redaction and ensuring the original Url field remains unchanged.

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