Add update (CRUD) for events and people; record the full-CRUD invariant

Events and people are now editable, not write-once: PATCH /events/{id} (type, structured date, place, notes) and PATCH /persons/{id} (vitals, privacy, and the primary name's given/surname). CLAUDE.md gains rule #8: every stored object must support full CRUD in API and UI — historical research is constant correction. Tests cover both updates.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Justin Paul <justin@jpaul.me>

backend/app/api/v1/events.py

@@ -3,7 +3,7 @@ import uuid
 from fastapi import APIRouter, status
 
 from app.api.deps import CurrentUser, SessionDep
-from app.schemas.event import EventCreate, EventRead
+from app.schemas.event import EventCreate, EventRead, EventUpdate
 from app.services import event_service, tree_service
 
 router = APIRouter(prefix="/trees", tags=["events"])
@@ -40,6 +40,25 @@ async def list_person_events(
     return [EventRead.model_validate(e) for e in events]
 
 
+@router.patch("/{tree_id}/events/{event_id}", response_model=EventRead)
+async def update_event(
+    tree_id: uuid.UUID,
+    event_id: uuid.UUID,
+    data: EventUpdate,
+    session: SessionDep,
+    current: CurrentUser,
+) -> EventRead:
+    tree = await tree_service.get_tree(session, viewer_id=current.id, tree_id=tree_id)
+    event = await event_service.update_event(
+        session,
+        actor=current,
+        tree=tree,
+        event_id=event_id,
+        changes=data.model_dump(exclude_unset=True),
+    )
+    return EventRead.model_validate(event)
+
+
 @router.delete("/{tree_id}/events/{event_id}", status_code=status.HTTP_204_NO_CONTENT)
 async def delete_event(
     tree_id: uuid.UUID, event_id: uuid.UUID, session: SessionDep, current: CurrentUser

backend/app/api/v1/persons.py

@@ -3,7 +3,7 @@ import uuid
 from fastapi import APIRouter, status
 
 from app.api.deps import CurrentUser, SessionDep
-from app.schemas.person import PersonCreate, PersonRead
+from app.schemas.person import PersonCreate, PersonRead, PersonUpdate
 from app.services import person_service, tree_service
 
 # Persons are nested under their tree (the tenant boundary).
@@ -56,6 +56,25 @@ async def list_persons(
     return [PersonRead.model_validate(p) for p in persons]
 
 
+@router.patch("/{tree_id}/persons/{person_id}", response_model=PersonRead)
+async def update_person(
+    tree_id: uuid.UUID,
+    person_id: uuid.UUID,
+    data: PersonUpdate,
+    session: SessionDep,
+    current: CurrentUser,
+) -> PersonRead:
+    tree = await tree_service.get_tree(session, viewer_id=current.id, tree_id=tree_id)
+    person = await person_service.update_person(
+        session,
+        actor=current,
+        tree=tree,
+        person_id=person_id,
+        changes=data.model_dump(exclude_unset=True),
+    )
+    return PersonRead.model_validate(person)
+
+
 @router.delete("/{tree_id}/persons/{person_id}", status_code=status.HTTP_204_NO_CONTENT)
 async def delete_person(
     tree_id: uuid.UUID, person_id: uuid.UUID, session: SessionDep, current: CurrentUser