diff --git a/agent/application/domain_models.py b/agent/application/domain_models.py
index 58847aa..8284f4b 100644
--- a/agent/application/domain_models.py
+++ b/agent/application/domain_models.py
@@ -42,9 +42,6 @@ class Conversation(BaseModel):
 
     id: str = Field(default_factory=lambda: str(uuid7()), description="会话唯一标识")
     description: str = Field(default="新会话", description="会话描述")
-    is_actived: bool = Field(
-        default=False, description="已激活，True 表示激活，False 表示不激活"
-    )
     is_running: bool = Field(
         default=False, description="正在运行，True 表示正在运行，False 表示未正在运行"
     )
diff --git a/agent/application/states/conversation.py b/agent/application/states/conversation.py
index 48172e0..e6f9f89 100644
--- a/agent/application/states/conversation.py
+++ b/agent/application/states/conversation.py
@@ -65,7 +65,7 @@ class ConversationState(rx.State):
 
     # 当前用户唯一标识
     user_id: str = ""
-    # 会话列表
+    # 键为会话唯一标识，值为会话实例的会话字典
     conversations: Dict[str, Conversation] = {}  # 按照会话唯一标识顺序排序
     # 当前会话唯一标识
     conversation_id: str = ""
@@ -87,24 +87,17 @@ class ConversationState(rx.State):
             return
 
         database_state = await self.get_state(DatabaseState)
-        # 获取会话列表
+        # 获取会话字典
         self.conversations = await database_state.get_conversations(
             user_id=self.user_id
         )
-        # 若会话列表为空则先创建会话记录再添加会话实例
+        # 若会话字典为空则先创建会话记录再在会话字典中添加会话实例
         if not self.conversations:
-            self.conversations.append(
+            self.conversations.update(
                 await database_state.create_conversations_record(user_id=self.user_id)
             )
-        # 将最后一个会话作为当前会话
-        self.idx = -1
-        self.conversation = self.conversations[self.idx]
-        # 将当前会话设置为已激活
-        self.conversation.is_actived = True
-        # 获取对话列表
-        self.conversation.dialogs = await database_state.get_dialogs(
-            conversation_id=self.conversation.id
-        )
+        # 将最后一个会话作为当前会话并更新会话唯一标识
+        self.conversation_id = next(reversed(self.conversations))
 
     @rx.event
     def toggle_conversation_history_shown(self) -> None:
@@ -136,8 +129,10 @@ class ConversationState(rx.State):
         获取会话历史项列表，用于前端渲染会话历史
         :return: 会话历史项列表
         """
-        items = []
-        for conversation in reversed(self.conversations):  # 按照创建顺序倒序排序
+        items: List[ConversationHistoryItem] = []
+        for conversation in reversed(
+            self.conversations.values()
+        ):  # 按照会话唯一标识倒序排序
             items.append(
                 ConversationHistoryItem(
                     id=conversation.id,
@@ -161,31 +156,28 @@ class ConversationState(rx.State):
 
         # 创建会话记录再添加会话实例
         database_state = await self.get_state(DatabaseState)
-        self.conversations.append(
+        self.conversations.update(
             await database_state.create_conversations_record(
                 user_id=self.user_id, description=description
             )
         )
-        # 将当前会话设置为未激活
-        self.conversation.is_actived = False
-        # 将最后一个会话作为当前会话并设置为已激活
-        self.conversation = self.conversations[-1]
-        self.conversation.is_actived = True
+        # 将最后一个会话作为当前会话并更新会话唯一标识
+        self.conversation_id = next(reversed(self.conversations))
 
         # 会话创建状态设置为未正在创建
         self.is_conversation_creating = False
 
     @rx.event
-    async def delete_conversation(self, idx: int) -> None:
+    async def delete_conversation(self, conversation_id: str) -> None:
         """
-        删除指定索引的会话
-        :param idx: 指定索引
+        删除指定会话
+        :param conversation_id: 指定会话唯一标识
         :return: None
         """
         # 先逻辑删除会话记录再在会话列表删除会话实例
         database_state = await self.get_state(DatabaseState)
         await database_state.delete_conversations_record(
-            conversation_id=self.conversations[idx].id
+            conversation_id=conversation_id
         )
         del self.conversations[idx]
 
diff --git a/agent/application/states/database.py b/agent/application/states/database.py
index cc9d8d7..63fbb7f 100644
--- a/agent/application/states/database.py
+++ b/agent/application/states/database.py
@@ -202,9 +202,9 @@ class DatabaseState(rx.State):
 
     async def get_conversations(self, user_id: str) -> Dict[str, Conversation]:
         """
-        获取会话列表
+        获取会话字典
         :param user_id: 用户唯一标识
-        :return: 会话列表
+        :return: 会话字典
         """
         records: Dict[str, Conversation] = {}
         async with rx.asession() as session:
@@ -242,27 +242,29 @@ class DatabaseState(rx.State):
 
     async def create_conversations_record(
         self, user_id: str, description: str = "新会话"
-    ) -> Conversation:
+    ) -> Dict[str, Conversation]:
         """
         创建会话记录
         :param user_id: 用户唯一标识
         :param description: 会话描述，默认为"新会话"
-        :return: 会话实例
+        :return: 键为会话唯一标识，值为会话实例的会话字典
         """
         async with rx.asession() as session:
             record = ConversationRecord(user_id=user_id, description=description)
             session.add(record)
             await session.commit()
             await session.refresh(record)
-        return Conversation(
-            id=record.id,
-            description=record.description,
-            created_at=record.created_at,
-        )
+        return {
+            record.id: Conversation(
+                id=record.id,
+                description=record.description,
+                created_at=record.created_at,
+            )
+        }
 
     async def delete_conversations_record(self, conversation_id: str) -> None:
         """
-        逻辑删除会话记录
+        逻辑删除会话记录（将会话已删除设置为 True）
         :param conversation_id: 指定会话唯一标识
         :return: None
         """