feat: 完善企业试用用户欢迎弹窗逻辑

- 添加试用到期时间检查

- 仅在试用未过期且有到期时间时显示欢迎弹窗

- 试用过期或无到期时间则显示邀请码弹窗

- 修复窗口重载后弹窗标记丢失问题

src/panels/ICHelperPanel.ts

@@ -539,25 +539,30 @@ export async function showICHelperPanel(
           // 检查是否需要显示欢迎弹窗
           {
             console.log("[ICHelperPanel] 收到 checkWelcomeModal 消息");
-            const showWelcome = context.globalState.get("showWelcomeModal");
-            console.log(
-              "[ICHelperPanel] showWelcomeModal 标记值:",
-              showWelcome,
-            );
+            const userInfo = getCachedUserInfo();
+            const hasWelcomed = context.globalState.get("pluginTrialWelcomed");
 
-            if (showWelcome) {
-              // 清除标记并显示欢迎弹窗
-              await context.globalState.update("showWelcomeModal", undefined);
-              console.log(
-                "[ICHelperPanel] ✅ 发送 showWelcomeModal 命令到前端",
-              );
+            console.log("[ICHelperPanel] 用户信息:", userInfo);
+            console.log("[ICHelperPanel] isPluginTrial:", userInfo?.isPluginTrial);
+            console.log("[ICHelperPanel] pluginTrialExpiresAt:", userInfo?.pluginTrialExpiresAt);
+            console.log("[ICHelperPanel] hasWelcomed:", hasWelcomed);
+
+            if (userInfo?.isPluginTrial === true && userInfo.pluginTrialExpiresAt !== null && userInfo.pluginTrialExpiresAt !== undefined) {
+              const now = Date.now();
+              const isExpired = now >= userInfo.pluginTrialExpiresAt;
+              console.log("[ICHelperPanel] 是否过期:", isExpired);
+
+              if (!isExpired && !hasWelcomed) {
+                await context.globalState.update("pluginTrialWelcomed", true);
+                console.log("[ICHelperPanel] ✅ 发送 showWelcomeModal 命令到前端");
                 panel.webview.postMessage({
                   command: "showWelcomeModal",
                 });
               } else {
-              console.log(
-                "[ICHelperPanel] showWelcomeModal 标记为 false，不显示弹窗",
-              );
+                console.log("[ICHelperPanel] 已过期或已显示过欢迎弹窗");
+              }
+            } else {
+              console.log("[ICHelperPanel] 非试用用户或无过期时间");
             }
           }
           break;