Redefines the "Nur persönliche" filter on /events from "appointment with
NULL project_id" to "items where created_by = me", applied uniformly to
deadlines and appointments.
Before: client-side filter dropped every deadline row because the type
guard was `x.type === "appointment"`. m saw zero deadlines under "Nur
persönliche" even though he created plenty.
After:
- /api/events?personal_only=true (and /api/events/summary?personal_only=true)
narrow BOTH rails to f.created_by / t.created_by = current user.
ProjectID is ignored when personal_only is set (the two are
contradictory).
- DeadlineService.ListFilter and AppointmentService.AppointmentListFilter
gain CreatedBy *uuid.UUID — composes with existing visibility (AND), so
a row created on a team the user has since left still won't leak.
- Frontend drops the client-side filter; sends personal_only=true when
projectFilter === PERSONAL. URL ?personal_only=true also accepted on
initial load (bookmark-friendly alias for ?project_id=__personal__).
Personal option now shows for type=Fristen too — applies uniformly.
- 3 new live subtests covering personal_only across type=deadline /
appointment / all, with mixed-creator + multi-project + null-project
fixtures.
9919e04657