feat:实现Token过期检查和自动清除机制

主要改动：
   - 在插件激活时检查Token是否过期，过期则自动清除session
   - 修复Token检查逻辑，从session.accessToken获取Token而非globalState
   - 在消息发送前检查Token有效性，过期则提示重新登录
   - 优化ICHelperPanel和ICViewProvider的Token过期处理
   - 修复退出登录命令名错误（iccoder.logout -> ic-coder.logout）
   - 添加Token过期检查文档文档

src/panels/ICHelperPanel.ts

@@ -19,6 +19,7 @@ import { VCDViewerPanel } from "./VCDViewerPanel";
 import { ChatHistoryManager } from "../utils/chatHistoryManager";
 import { MessageType } from "../types/chatHistory";
 import { getCachedUserInfo } from "../services/userService";
+import { isTokenExpired } from "../utils/jwtUtils";
 
 /**
  * 获取会员等级图标 URI
@@ -58,6 +59,30 @@ export async function showICHelperPanel(
   context: vscode.ExtensionContext,
   viewColumn?: vscode.ViewColumn
 ) {
+  // 检查 token 是否过期
+  let token: string | undefined;
+  try {
+    const session = await vscode.authentication.getSession("iccoder", [], { createIfNone: false });
+    token = session?.accessToken;
+  } catch (error) {
+    console.warn('[ICHelperPanel] 获取 session 失败:', error);
+  }
+
+  if (token && isTokenExpired(token)) {
+    // 清除过期的 session
+    await context.globalState.update('icCoderSessions', []);
+    await context.globalState.update('icCoderUserInfo', undefined);
+
+    const action = await vscode.window.showWarningMessage(
+      '登录已过期，请重新登录',
+      '立即登录'
+    );
+    if (action === '立即登录') {
+      vscode.commands.executeCommand("ic-coder.login");
+    }
+    return;
+  }
+
   // 检查用户是否已登录
   try {
     const session = await vscode.authentication.getSession("iccoder", [], {
@@ -104,6 +129,7 @@ export async function showICHelperPanel(
     .toString(36)
     .substr(2, 9)}`;
   (panel as any).__uniqueId = panelId;
+  (panel as any).__context = context;
 
   // 设置标签页图标
   panel.iconPath = vscode.Uri.joinPath(
@@ -190,6 +216,25 @@ export async function showICHelperPanel(
     console.error('[ICHelperPanel] 获取用户信息失败:', error);
   }
 
+  // 检查是否有待发送的消息
+  const pendingMessage = context.globalState.get('pendingMessage') as any;
+  if (pendingMessage) {
+    console.log('[ICHelperPanel] 检测到待发送消息，准备自动发送');
+
+    // 清除待发送消息
+    await context.globalState.update('pendingMessage', undefined);
+
+    // 延迟发送，确保面板已完全初始化
+    setTimeout(() => {
+      panel.webview.postMessage({
+        command: 'autoSendMessage',
+        text: pendingMessage.text,
+        mode: pendingMessage.mode,
+        serviceTier: pendingMessage.serviceTier
+      });
+    }, 500);
+  }
+
   // 处理消息
   panel.webview.onDidReceiveMessage(
     async (message) => {
@@ -524,7 +569,7 @@ export async function showICHelperPanel(
           break;
         case "logout":
           // 退出登录（前端已有确认对话框）
-          vscode.commands.executeCommand('iccoder.logout');
+          vscode.commands.executeCommand('ic-coder.logout');
           break;
       }
     },