优化系统管理员头像

router_messages.py

@@ -28,14 +28,18 @@ async def publish_announcement(ann: SystemAnnouncement, current_user: str = Depe
     if not is_admin(current_user):
         raise HTTPException(status_code=403, detail="无权发布系统公告，仅管理员可操作")
     
+    # 查询管理员信息
+    users_db = db.load_data("users.json", default_data={})
+    admin_info = users_db.get(current_user, {})
+    
     announcements_db = db.load_data("announcements.json", default_data=[])
     
     new_ann = {
         "id": f"sys_{int(time.time())}_{uuid.uuid4().hex[:6]}",
         "type": "system",
         "from_user": current_user,  # 使用真实的管理员账号
-        "from_name": "官方团队",
-        "from_avatar": "",
+        "from_name": admin_info.get("name", current_user),  # 使用真实昵称，fallback 为账号
+        "from_avatar": admin_info.get("avatarDataUrl", ""),  # 使用真实头像
         "content": ann.content,
         "created_at": int(time.time())
     }