[AlexAndBear]

Description

• Folder edit link after a reload: the reloaded public space gets its real file id again, so "Save as" is offered in the editor as before the reload.
• Single-file links: unchanged, they still have no "Save as".

Related Issue

• Fixes "Save as" is missing in the editor of a folder edit link after a reload #3782

How Has This Been Tested?

• test environment: unit tests (Vitest), browser tests (Playwright) against a local OpenCloud
• test case 1: unit: the real file id of a public folder link is set after a reload
• test case 2: browser: anonymous folder edit link with password, reload on the list and in the editor, Save as writes the copy; single-file, view-only and upload links, breadcrumbs, logged-in owner

Types of changes

• Bugfix
• Enhancement (a change that doesn't break existing code or deployments)
• Breaking change (a modification that affects current functionality)
• Technical debt (addressing code that needs refactoring or improvements)
• Tests (adding or improving tests)
• Documentation (updates or additions to documentation)
• Maintenance (like dependency updates or tooling adjustments)