feat(helpdesk): align module with core list/drawer standards

- add helpdesk module pages, services, settings and tests

- standardize debtor list on drawer/grid contracts and robust filter drawer behavior

- add helpdesk aside panel navigation and settings visibility provider

- switch primary list slug to helpdesk/debitor and remove helpdesk/search compatibility

- include required core contract updates for list contracts and detail/drawer integration

db/init/init.sql

@@ -1550,7 +1550,8 @@ JOIN permissions p ON p.`key` IN (
   'api_tokens.manage',
   'mail_log.view', 'api_audit.view', 'system_audit.view', 'system_audit.purge',
   'stats.view', 'system_info.view',
-  'roles.assign_all'
+  'roles.assign_all',
+  'helpdesk.access', 'helpdesk.settings.manage'
 )
 WHERE r.description IN ('Admin', 'Administrator') OR r.id = 1
 ON DUPLICATE KEY UPDATE role_id = role_id;
@@ -1613,7 +1614,8 @@ JOIN permissions p ON p.`key` IN (
   'address_book.view',
   'departments.view', 'roles.view',
   'api_tokens.manage',
-  'custom_fields.edit_values'
+  'custom_fields.edit_values',
+  'helpdesk.access'
 )
 WHERE r.code = 'SUPPORT'
 ON DUPLICATE KEY UPDATE role_id = role_id;