feat(documents): refresh detail pages and attachment cards

backend/app/services/document_service.py

@@ -77,6 +77,13 @@ def _version_snapshot(version: DocumentVersion) -> dict:
     }
 
 
+def _version_read(version: DocumentVersion, users_by_id: dict[uuid.UUID, object] | None = None) -> DocumentVersionRead:
+    creator = users_by_id.get(version.created_by) if users_by_id and version.created_by else None
+    return DocumentVersionRead.model_validate(version).model_copy(
+        update={"created_by_user": UserDisplay.model_validate(creator) if creator else None}
+    )
+
+
 async def _ensure_study_access(db: AsyncSession, trial_id: uuid.UUID, current_user, action: str):
     study = await study_crud.get(db, trial_id)
     if not study:
@@ -242,6 +249,8 @@ async def get_document_detail(
         owner_obj = await user_crud.get_by_id(db, doc.owner_id)
         if owner_obj:
             owner = UserDisplay.model_validate(owner_obj)
+    creator_ids = {v.created_by for v in versions if v.created_by}
+    version_creators = await user_crud.get_users_by_ids(db, creator_ids)
     return DocumentDetail(
         id=doc.id,
         trial_id=doc.trial_id,
@@ -257,7 +266,7 @@ async def get_document_detail(
         created_at=doc.created_at,
         updated_at=doc.updated_at,
         owner=owner,
-        version_timeline=[DocumentVersionRead.model_validate(v) for v in versions],
+        version_timeline=[_version_read(v, version_creators) for v in versions],
         distribution_stats=distribution_stats,
     )