Removed group shares stay in the recipients' Shared with me until reload #4319

Initial Checklist

• I understand this is a bug report and questions should be posted in the Community Discussions
• I searched issues and couldn’t find anything (or linked relevant results below)

Bug Description

Since #3981, removing a group share doesn't update the recipients' "Shared with me" list live anymore. For group shares the server sends the group id in affecteduserids, but the share removed handler now only acts when the current user's id is in there.

Reproduction Steps

1. Create a group with users B and C
2. As user A, share a folder with the group
3. As B, open Shares → Shared with me
4. As A, remove the group share

Expected Outcome

The folder disappears from B's list, like before #3981.

Actual Outcome

The folder stays listed until a reload; opening it shows "Resource not found". The check is in packages/web-runtime/src/container/sse/shares.ts (isSharedWithMeActive(router) && isAffected).