[AlexAndBear]

Description

When only your direct share is removed but you still have access through a group share, you're no longer told that your access was revoked; the open folder just stays as it is.

Related Issue

• Fixes Access revoked message shows although access remains through a group share #4307

How Has This Been Tested?

• test environment: unit tests (Vitest), browser tests (Playwright) against a local OpenCloud
• test case 1: unit: share removed SSE handler checks access to the current folder first, stays quiet when it's still reachable and shows the message when it isn't
• test case 2: browser: direct + group share removed at the share root and in a subfolder, group share added after opening and then the direct share removed, direct-only share removed (message still shown)

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)