Fix Input component to preserve special link values (<front>, <nolink>) in Layout Builder blocks

Problem/Motivation

When adding a link field with a special alias such as <front>, <nolink>, or / inside a Layout Builder block, the value does not render correctly when displayed through an input component in the front-end theme.
Instead of resolving to / or showing the alias, the value attribute of the input is empty.
This leads to inconsistent behavior:

• Link values are stored correctly in the database.
• When editing the block, the input field appears empty in the modal, making it unclear that a link is already set.

This creates confusion for editors and makes working with link fields inside Layout Builder modals unreliable.

Steps to reproduce

1. Enable Layout Builder and place a block with a link field inside a section.
2. Edit the block and set the link field to <front>.
3. Save the block.
4. Reopen the same block in a Layout Builder modal while using a front-end theme that renders inputs via a component (Input component).

Actual result:
The link field’s input is empty.

Expected result:
The link field’s input should display the <front> value.

Proposed resolution

Ensure that special values (<front>, <nolink>, /) are preserved when passed to the value attribute in input components.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-10.1.0-beta1, vartheme_bs5-4.0.0-beta1

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• [#3545253] fix: Input component to preserve special link values (<front>, <nolink>) in Layout Builder blocks by n.ghunaim