[Edit Content]: Cannot Access Templates from Other Sites When Creating a Page

Problem Statement

When creating a page under a new site, users are unable to access templates from other sites. The Template Selector is incorrectly scoped, preventing shared or global templates from being reused.

Steps to Reproduce

1. Create a new blank site.
2. Attempt to create a new page within that site.
3. Open the Template Selector.
4. Notice that only templates specific to the current site (or none at all) are available.

Video

https://github.com/user-attachments/assets/b9b8650e-0750-49d7-a6d0-154ab115f297

Expected Behavior

• The Template Selector should display templates available across all sites, not just the current one.
• Users should be able to reuse templates from existing sites when creating pages in new or alternate sites.

Acceptance Criteria

• The Template Selector allows selecting templates from all available sites.
• UI and filtering logic reflect proper permissions and access rules.
• No regressions when working in site-scoped template contexts.

dotCMS Version

main / trunk

Proposed Objective

User Experience

Proposed Priority

Priority 2 – Important

Start by reproducing the blank-site flow described in the issue and inspect the Template Selector entry point and its site-scoped filtering and permission checks. Done means templates from permitted sites can be selected for a new page, while existing site-scoped behavior remains unchanged and the relevant regression coverage passes.