fix(chat)：建立连接前进行 token 有效性验证

src/components/chat/hooks/useAgentChatSession.ts

@@ -683,6 +683,10 @@ export const useAgentChatSession = ({
     async (targetSessionId: string) => {
       if (isHydrating || isStreaming) return;
 
+      setChatSessions((prev) =>
+        prev.filter((session) => session.id !== targetSessionId),
+      );
+
       try {
         const nextActiveSessionId = await deleteChatSession(
           targetSessionId,
@@ -732,6 +736,11 @@ export const useAgentChatSession = ({
         setChatSessions(sessionsAfterDelete);
       } catch (error) {
         console.error("[GlobalChatbox] Failed to delete chat session:", error);
+        try {
+          setChatSessions(await listChatSessions());
+        } catch (refreshError) {
+          console.error("[GlobalChatbox] Failed to refresh chat sessions:", refreshError);
+        }
       } finally {
         setIsHydrating(false);
       }