Allow admins to customize the end-user Public Workspace display name

[paullizer]

Summary

Add an admin-configurable end-user display name for Public Workspace so organizations can brand the feature with their preferred terminology, such as "Domain Knowledge", without changing internal/admin terminology.

User Value

Some organizations want end users to see language that matches their internal knowledge-management vocabulary. Admins should be able to keep managing the feature as Public Workspace while presenting a clearer tenant-specific label to users.

Proposed Behavior

• Admin app settings continue to call the capability Public Workspace.
• Admins can configure an end-user display name up to 32 characters.
• End-user UI surfaces use the configured display name, with Public Workspace as the default when no custom value is configured.
• Internal route names, API names, document fields, permissions, and admin-facing terminology remain Public Workspace/public_workspace for compatibility and admin clarity.

Acceptance Criteria

• Admin settings include a Public Workspace configuration field for the end-user display name with a 32-character limit.
• End-user navigation, page titles, headings, empty states, prompts, and relevant client-side messages use the configured display name.
• Admin pages, admin help text, code identifiers, API contracts, permissions, and storage fields continue to use Public Workspace/public_workspace terminology.
• The default display remains Public Workspace/Public Workspaces when the setting is empty or unset.
• The setting is sanitized before it is sent to frontend templates or JavaScript.
• Functional tests cover default and customized display-name behavior.

Notes

• Priority: P2
• Estimated size: M
• Planning branch: paullizer-configurable-public-workspace-name

[paullizer]

Implementation complete for the configurable end-user Public Workspace display name.

Summary:

• Added a 32-character Admin Settings field for the end-user display name while keeping admin/internal terminology as Public Workspace/public_workspace.
• Wired sanitized label context across end-user navigation, Profile, Public Directory, Public Workspace pages, chat scope selection, and related browser messages.
• Added feature documentation and release notes under v0.250.110.

Validation:

• python functional_tests\test_public_workspace_display_name_settings.py
• python -m py_compile application\single_app\functions_settings.py application\single_app\route_frontend_admin_settings.py functional_tests\test_public_workspace_display_name_settings.py ui_tests\test_public_workspace_display_name_ui.py
• node --check for the changed JavaScript files
• python -m pytest ui_tests\test_public_workspace_display_name_ui.py -q (skipped when UI env vars/storage state are not configured)
• git diff --check

[paullizer]

Implemented in PR #1148. Closing this tracking issue.