Enhancement: Read-only edit view for templates (campus users)

[bcordis]

Context

With the multi-campus location system, campus users can see global templates in the list but cannot edit them — they must clone first. Currently, clicking a global template just bounces the user back to the list with an access denied message.

Enhancement Idea

Allow campus users to open global templates in a read-only view so they can inspect the template settings before deciding to clone.

Possible approaches:

• Add a readonly flag to the template edit view that disables all form inputs and hides Save/Apply buttons
• Create a separate "preview" layout
• Joomla does not have built-in support for read-only edit views, so this would be custom work

Priority

Low — the clone-first workflow works fine since users can see template name/description in the list. This would be a UX improvement for users who want to inspect full template configuration before cloning.

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Related to the multi-campus location system (PR #1103+)

[bcordis]

Additional Note: Global Podcasts & Servers

The same read-only / access-denied pattern applies to podcasts and servers that are marked as Global (All Campuses).

With the campus filtering implementation (branch feature/batch-location-servers):

• Podcasts and servers now support a location_id field with a "Global (All Campuses)" option (location_id = NULL in the database)
• Global podcasts/servers appear in all campus users' lists (via the IS NULL clause in the location filter)
• Only super admins can edit global podcasts and servers — campus users should not be able to modify shared resources that affect all campuses
• Campus users can create campus-specific podcasts assigned to their own location

This is consistent with the template behavior described above: global resources are visible but not editable by non-admin users.

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Related to analytics campus filtering + podcast/server location field work on feature/batch-location-servers