🤖 Fixed: promoting an existing member to admin now tells every open tab
right away, instead of waiting for a reconnect. Previously a stale tab could
keep treating a freshly-promoted admin as a regular member for a while —
notably, a member filing a report during that window would leave the new
admin unable to read it, with the Reports panel showing a misleading
"filed before you became an admin" message. That message is now more
honest about what it can't verify.