diff --git a/apps/main.py b/apps/main.py
index 1189366819eb382b74ebb9f392c8e2d3ba67bde6..d33212c6a3ebf007c4f65fb2a6dcf8a67d281b18 100644
--- a/apps/main.py
+++ b/apps/main.py
@@ -17,6 +17,7 @@ from apps.cron.delete_user import DeleteUserCron
 from apps.dependency.session import VerifySessionMiddleware
 from apps.routers import (
     api_key,
+    appcenter,
     auth,
     blacklist,
     chat,
@@ -45,6 +46,7 @@ app.add_middleware(VerifySessionMiddleware)
 app.include_router(conversation.router)
 app.include_router(auth.router)
 app.include_router(api_key.router)
+app.include_router(appcenter.router)
 app.include_router(comment.router)
 app.include_router(record.router)
 app.include_router(health.router)
diff --git a/apps/manager/appcenter.py b/apps/manager/appcenter.py
index df693ff59225d60ea6d624533229cf23e961fe67..f94866bb338b77416e7957826fac725603ec3736 100644
--- a/apps/manager/appcenter.py
+++ b/apps/manager/appcenter.py
@@ -6,8 +6,11 @@ import uuid
 from enum import Enum
 from typing import Any, Optional
 
+from fastapi.encoders import jsonable_encoder
+
 from apps.constants import LOGGER
 from apps.entities.appcenter import AppCenterCardItem, AppData
+from apps.entities.collection import User
 from apps.entities.enum_var import SearchType
 from apps.entities.flow import Permission
 from apps.entities.pool import AppPool
@@ -164,7 +167,7 @@ class AppCenterManager:
         )
         try:
             app_collection = MongoDB.get_collection("app")
-            await app_collection.insert_one(app.model_dump(by_alias=True))
+            await app_collection.insert_one(jsonable_encoder(app))
             return app_id
         except Exception as e:
             LOGGER.error(f"[AppCenterManager] Create app failed: {e}")
@@ -255,21 +258,23 @@ class AppCenterManager:
         try:
             user_collection = MongoDB.get_collection("user")
             app_collection = MongoDB.get_collection("app")
-            user_data = await user_collection.find_one({"_id": user_sub}, {"_id": 0, "app_usage": 1})
-            if user_data and "app_usage" in user_data and user_data["app_usage"]:
-                usage_list = sorted(
-                    user_data["app_usage"].items(),
-                    key=lambda x: x[1]["last_used"],
-                    reverse=True,
-                )[:count]
-                app_ids = [t[0] for t in usage_list]
-                apps = await app_collection.find(
-                    {"_id": {"$in": app_ids}}, {"name": 1}).to_list(len(app_ids))
-                app_map = {str(a["_id"]): a.get("name", "") for a in apps}
-                return RecentAppList(applications=[
-                    RecentAppListItem(appId=app_id, name=app_map.get(app_id, ""))
-                    for app_id in app_ids
-                ])
+            # 校验用户信息
+            user_data = User.model_validate(await user_collection.find_one({"_id": user_sub}))
+            # 获取最近使用的应用ID列表，按最后使用时间倒序排序
+            # 允许 app_usage 为空
+            usage_list = sorted(
+                user_data.app_usage.items(),
+                key=lambda x: x[1].last_used,
+                reverse=True,
+            )[:count]
+            app_ids = [t[0] for t in usage_list]
+            apps = await app_collection.find(
+                {"_id": {"$in": app_ids}}, {"name": 1}).to_list(len(app_ids))
+            app_map = {str(a["_id"]): a.get("name", "") for a in apps}
+            return RecentAppList(applications=[
+                RecentAppListItem(appId=app_id, name=app_map.get(app_id, ""))
+                for app_id in app_ids
+            ])
         except Exception as e:
             LOGGER.info(f"[AppCenterManager] Get recently used apps failed: {e}")
         return None
diff --git a/apps/manager/conversation.py b/apps/manager/conversation.py
index 5d5a2825e8a88e8514c50b4b49b4c2c547a29564..f595d0c5b1103eea9e52319ba0304d7e7beac25d 100644
--- a/apps/manager/conversation.py
+++ b/apps/manager/conversation.py
@@ -3,6 +3,7 @@
 Copyright (c) Huawei Technologies Co., Ltd. 2023-2024. All rights reserved.
 """
 import uuid
+from datetime import datetime, timezone
 from typing import Any, Optional
 
 from apps.constants import LOGGER
@@ -39,7 +40,7 @@ class ConversationManager:
 
     @staticmethod
     async def add_conversation_by_user_sub(user_sub: str, app_id: str, *, is_debug: bool) -> Optional[Conversation]:
-        """通过用户ID查询历史记录"""
+        """通过用户ID新建对话"""
         conversation_id = str(uuid.uuid4())
         conv = Conversation(
             _id=conversation_id,
@@ -52,7 +53,18 @@ class ConversationManager:
                 conv_collection = MongoDB.get_collection("conversation")
                 await conv_collection.insert_one(conv.model_dump(by_alias=True), session=session)
                 user_collection = MongoDB.get_collection("user")
-                await user_collection.update_one({"_id": user_sub}, {"$push": {"conversations": conversation_id}}, session=session)
+                update_data: dict[str, dict[str, Any]] = {
+                    "$push": {"conversations": conversation_id},
+                }
+                # 非调试模式下更新应用使用情况
+                if not is_debug:
+                    update_data["$set"] = {f"app_usage.{app_id}.last_used": round(datetime.now(timezone.utc).timestamp(), 3)}
+                    update_data["$inc"] = {f"app_usage.{app_id}.count": 1}
+                await user_collection.update_one(
+                    {"_id": user_sub},
+                    update_data,
+                    session=session,
+                )
                 await session.commit_transaction()
                 return conv
         except Exception as e:
diff --git a/apps/routers/appcenter.py b/apps/routers/appcenter.py
index 9d25b7407764b944a5ed22b1e545bba29bfc8ad3..8ba2f16c30552788ab320ab91afbe4e0a841020b 100644
--- a/apps/routers/appcenter.py
+++ b/apps/routers/appcenter.py
@@ -37,12 +37,13 @@ router = APIRouter(
 @router.get("", response_model=Union[GetAppListRsp, ResponseData])
 async def get_applications(  # noqa: ANN201, PLR0913
     user_sub: Annotated[str, Depends(get_user)],
-    my_app: Annotated[Optional[bool], Query(None, alias="createdByMe", description="筛选我创建的")],
-    my_fav: Annotated[Optional[bool], Query(None, alias="favorited", description="筛选我收藏的")],
-    search_type: Annotated[SearchType, Query(SearchType.ALL, alias="searchType", description="搜索类型")],
-    keyword: Annotated[Optional[str], Query(None, alias="keyword", description="搜索关键字")],
-    page: Annotated[int, Query(1, alias="page", ge=1, description="页码")],
-    page_size: Annotated[int, Query(20, alias="pageSize", ge=1, le=100, description="每页条数")],
+    *,
+    my_app: Annotated[bool, Query(..., alias="createdByMe", description="筛选我创建的")] = False,
+    my_fav: Annotated[bool, Query(..., alias="favorited", description="筛选我收藏的")] = False,
+    search_type: Annotated[SearchType, Query(..., alias="searchType", description="搜索类型")] = SearchType.ALL,
+    keyword: Annotated[Optional[str], Query(..., alias="keyword", description="搜索关键字")] = None,
+    page: Annotated[int, Query(..., alias="page", ge=1, description="页码")] = 1,
+    page_size: Annotated[int, Query(..., alias="pageSize", ge=1, le=100, description="每页条数")] = 20,
 ):
     """获取应用列表"""
     if my_app and my_fav:  # 只能同时使用一个过滤条件
@@ -117,13 +118,13 @@ async def create_or_update_application(  # noqa: ANN201
 
 @router.get("/recent", response_model=Union[GetRecentAppListRsp, ResponseData])
 async def get_recently_used_applications(  # noqa: ANN201
-    count: Annotated[int, Query(5, ge=1, le=10)],
     user_sub: Annotated[str, Depends(get_user)],
+    count: Annotated[int, Query(..., ge=1, le=10)] = 5,
 ):
     """获取最近使用的应用"""
     recent_apps = await AppCenterManager.get_recently_used_apps(
         count, user_sub)
-    if not recent_apps:
+    if recent_apps is None:
         return JSONResponse(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, content=ResponseData(
             code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             message="查询失败",