feat(groups): include member profile fields in chat members API

app/chats/schemas.py

@@ -46,6 +46,9 @@ class ChatMemberRead(BaseModel):
 
     id: int
     user_id: int
+    username: str | None = None
+    name: str | None = None
+    avatar_url: str | None = None
     role: ChatMemberRole
     joined_at: datetime
 

app/chats/service.py

@@ -276,7 +276,21 @@ async def get_chat_for_user(db: AsyncSession, *, chat_id: int, user_id: int) ->
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="You are not a member of this chat")
 
     members = await repository.list_chat_members(db, chat_id=chat_id)
-    return chat, members
+    enriched_members: list[ChatMemberRead] = []
+    for member in members:
+        user = await get_user_by_id(db, member.user_id)
+        enriched_members.append(
+            ChatMemberRead(
+                id=member.id,
+                user_id=member.user_id,
+                username=user.username if user else None,
+                name=user.name if user else None,
+                avatar_url=user.avatar_url if user else None,
+                role=member.role,
+                joined_at=member.joined_at,
+            )
+        )
+    return chat, enriched_members
 
 
 async def ensure_chat_membership(db: AsyncSession, *, chat_id: int, user_id: int) -> None: