[AlexAndBear]

Description

• Current-user check: the silent re-login after a user name change compared the edited user with its own copy (always true). It now compares with the logged-in user, so renaming other users no longer re-authenticates the admin.

Related Issue

• Fixes Renaming any user in admin settings re-authenticates the admin #3877

How Has This Been Tested?

• test environment: unit tests (Vitest), browser tests (Playwright) against a local OpenCloud
• test case 1: unit: renaming another user doesn't call signinSilent
• test case 2: browser: renaming another user sends no silent renew; renaming yourself still renews and the session keeps working; display name, role, quota and group edits still save

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)