修复前后端显示异常问题（受试者、中心、负责人、日期等）

backend/app/api/v1/milestones.py

@@ -7,7 +7,11 @@ from app.core.deps import get_current_user, get_db_session, require_study_member
 from app.crud import audit as audit_crud
 from app.crud import milestone as milestone_crud
 from app.crud import study as study_crud
+from app.crud import user as user_crud
+from app.crud import site as site_crud
 from app.schemas.milestone import MilestoneCreate, MilestoneRead, MilestoneUpdate
+from app.schemas.user import UserDisplay
+from app.schemas.milestone import SiteDisplay
 
 router = APIRouter()
 
@@ -33,6 +37,12 @@ async def create_milestone(
 ) -> MilestoneRead:
     await _ensure_study_exists(db, study_id)
     milestone = await milestone_crud.create(db, study_id, milestone_in)
+    owner = None
+    site = None
+    if milestone.owner_id:
+        owner = await user_crud.get_by_id(db, milestone.owner_id)
+    if milestone.site_id:
+        site = await site_crud.get_site(db, milestone.site_id)
     await audit_crud.log_action(
         db,
         study_id=study_id,
@@ -43,7 +53,22 @@ async def create_milestone(
         operator_id=current_user.id,
         operator_role=current_user.role,
     )
-    return milestone
+    return MilestoneRead(
+        id=milestone.id,
+        study_id=milestone.study_id,
+        type=milestone.type,
+        name=milestone.name,
+        planned_date=milestone.planned_date,
+        actual_date=milestone.actual_date,
+        status=milestone.status,
+        owner_id=milestone.owner_id,
+        site_id=milestone.site_id,
+        owner=UserDisplay.model_validate(owner) if owner else None,
+        site=SiteDisplay.model_validate(site) if site else None,
+        notes=milestone.notes,
+        created_at=milestone.created_at,
+        updated_at=milestone.updated_at,
+    )
 
 
 @router.get(
@@ -57,7 +82,33 @@ async def list_milestones(
 ) -> list[MilestoneRead]:
     await _ensure_study_exists(db, study_id)
     milestones = await milestone_crud.list_milestones(db, study_id)
-    return list(milestones)
+    owner_ids = {m.owner_id for m in milestones if m.owner_id}
+    site_ids = {m.site_id for m in milestones if m.site_id}
+    users_map = await user_crud.get_users_by_ids(db, owner_ids)
+    sites_map = await site_crud.get_sites_by_ids(db, site_ids)
+    result: list[MilestoneRead] = []
+    for m in milestones:
+        owner = users_map.get(m.owner_id)
+        site = sites_map.get(m.site_id)
+        result.append(
+            MilestoneRead(
+                id=m.id,
+                study_id=m.study_id,
+                type=m.type,
+                name=m.name,
+                planned_date=m.planned_date,
+                actual_date=m.actual_date,
+                status=m.status,
+                owner_id=m.owner_id,
+                site_id=m.site_id,
+                owner=UserDisplay.model_validate(owner) if owner else None,
+                site=SiteDisplay.model_validate(site) if site else None,
+                notes=m.notes,
+                created_at=m.created_at,
+                updated_at=m.updated_at,
+            )
+        )
+    return result
 
 
 @router.patch(
@@ -78,6 +129,12 @@ async def update_milestone(
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Milestone not found")
     old_status = milestone.status
     updated = await milestone_crud.update(db, milestone, milestone_in)
+    owner = None
+    site = None
+    if updated.owner_id:
+        owner = await user_crud.get_by_id(db, updated.owner_id)
+    if updated.site_id:
+        site = await site_crud.get_site(db, updated.site_id)
     detail = None
     if milestone_in.status and milestone_in.status != old_status:
         detail = f"milestone {milestone_id} status {old_status} -> {milestone_in.status}"
@@ -91,4 +148,19 @@ async def update_milestone(
         operator_id=current_user.id,
         operator_role=current_user.role,
     )
-    return updated
+    return MilestoneRead(
+        id=updated.id,
+        study_id=updated.study_id,
+        type=updated.type,
+        name=updated.name,
+        planned_date=updated.planned_date,
+        actual_date=updated.actual_date,
+        status=updated.status,
+        owner_id=updated.owner_id,
+        site_id=updated.site_id,
+        owner=UserDisplay.model_validate(owner) if owner else None,
+        site=SiteDisplay.model_validate(site) if site else None,
+        notes=updated.notes,
+        created_at=updated.created_at,
+        updated_at=updated.updated_at,
+    )