Use isUnsafeLink for xcode protocol

What does this MR do and why?

Root Cause

The issue was in the compact code dropdown component (app/assets/javascripts/repository/components/code_dropdown/compact_code_dropdown.vue). When creating the Xcode IDE item, it was missing the extraAttrs: { isUnsafeLink: true } attribute that's required for custom protocol schemes like xcode:// to work properly.

The Problem

• The regular code dropdown component correctly included extraAttrs: { isUnsafeLink: true } for the Xcode link
• The compact code dropdown component (used when the directory_code_dropdown_updates feature flag is enabled) was missing this attribute
• Without this attribute, the GitLab UI components don't properly handle custom protocol schemes, causing the link to navigate to about:blank instead of opening Xcode

The Fix

I updated the compact code dropdown component to include the missing isUnsafeLink attribute:

Before:

if (this.xcodeUrl) {
  actions.push({ text: __('Xcode'), href: this.xcodeUrl });
}

After:

if (this.xcodeUrl) {
  actions.push({ text: __('Xcode'), href: this.xcodeUrl, extraAttrs: { isUnsafeLink: true } });
}

Files Changed

1. app/assets/javascripts/repository/components/code_dropdown/compact_code_dropdown.vue - Added the missing extraAttrs: { isUnsafeLink: true } attribute
2. spec/frontend/repository/components/code_dropdown/mock_data.js - Updated the test mock data to include the new attribute

References

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. In a project of your choice, make sure you have necessary setup for Xcode (see https://docs.gitlab.com/topics/git/clone/#clone-and-open-in-apple-xcode). If not, you can copy it over from this demo project.
2. Open Project overview, for example: http://gdk.test:8080/flightjs/Flight/
3. Click Code to open code dropdown.
4. In Open with dropdown group, you should have Xcode listed.
5. Inspect the link and make sure it has a valid URL. It should start with xcode://clone?repo=ssh followed by your instance domain and project name.

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #571489 (closed)