[AlexAndBear]

Description

• Shared folders: a URL into another user's personal space (e.g. copied by the owner) now opens the shared item via its file id, like a permanent link, instead of silently dropping you on your own Personal root.
• No access: without a file id such a URL now shows the not found message; unknown project space URLs behave as before.

Related Issue

• Fixes Another user's personal space URL silently redirects to your own Personal root #4304

How Has This Been Tested?

• test environment: unit tests (Vitest), browser tests (Playwright) against a local OpenCloud
• test case 1: unit: DriveResolver resolves the file id for unknown personal aliases only (details query kept), DriveRedirect shows not found for another user's personal alias and still redirects personal/home and personal/
• test case 2: browser: the issue's URL lands on the share (also with details, no back-button loop); without file id not found; own personal, personal/home, personal/, project and share URLs after reload, unknown project URL and public link unchanged

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)