Wrong invitation status shown in shared calendars

Steps to reproduce

When I view another user's calendar (for example, a colleague), the status of invitations (accepted or declined) always matches my own choice, not theirs.
If I decline a meeting and the other person accepts it, I see the event in their calendar as “declined” instead of their actual response.

Steps to reproduce:

• Create an event and invite multiple users. User A invite B

• B received the invitation

• B declined the invitation
• When B have a look to the A agenda, both seems "declined", you have to clic in the details to see that A has accepted

• it shows your own response, not theirs.

Expected behavior

When viewing someone else’s calendar, the invitation status should reflect their response, not mine.

Actual behavior

This makes it hard to know others’ availability and leads to misunderstandings in team event planning.

Calendar app version

No response

CalDAV-clients used

No response

Browser

No response

Client operating system

No response

Server operating system

No response

Web server

None

Database engine version

None

PHP engine version

None

Nextcloud version

Nextcloud Hub 10 (31.0.9 Enterprise)

Updated from an older installed version or fresh install

None

List of activated apps

Nextcloud configuration

Web server error log

Log file

Browser log

Additional info

No response

Start by reproducing the shared-calendar invitation flow described in the issue and trace how each attendee's response is obtained and displayed. Done means that viewing another user's calendar shows that user's accepted or declined status rather than the viewer's own response, including the reported multi-user event scenario.