fix: 修复关闭面板后快捷键无法自动打开面板的问题

- 通过 try-catch 检测 webview 是否真正可用
   - 修复 panel._isDisposed 检测不准确的问题
   - 增加异常捕获防止发送消息时崩溃
   - 延长消息发送延迟至 500ms 确保面板加载完成

src/extension.ts

@@ -286,8 +286,12 @@ export async function activate(context: vscode.ExtensionContext) {
   const addCodeToChat = vscode.commands.registerCommand(
     "ic-coder.addCodeToChat",
     async () => {
+      console.log('[addCodeToChat] 命令触发');
       const editor = vscode.window.activeTextEditor;
-      if (!editor) return;
+      if (!editor) {
+        console.log('[addCodeToChat] 没有活动编辑器');
+        return;
+      }
 
       const selection = editor.selection;
       const selectedText = editor.document.getText(selection);
@@ -303,24 +307,53 @@ export async function activate(context: vscode.ExtensionContext) {
 
       // 检查是否已有打开的面板
       let panel = (global as any).currentICHelperPanel;
-      if (!panel || panel._isDisposed) {
+      let needCreatePanel = false;
+
+      if (!panel) {
+        needCreatePanel = true;
+      } else {
+        // 尝试访问 webview，如果抛出异常说明已销毁
+        try {
+          const _ = panel.webview;
+        } catch (e) {
+          needCreatePanel = true;
+        }
+      }
+
+      console.log('[addCodeToChat] 需要创建面板:', needCreatePanel);
+
+      if (needCreatePanel) {
+        console.log('[addCodeToChat] 正在打开面板...');
         await showICHelperPanel(context);
         panel = (global as any).currentICHelperPanel;
+        console.log('[addCodeToChat] 面板打开后状态:', panel ? '成功' : '失败');
+
+        // 如果面板仍未创建（如未登录），直接返回
+        if (!panel) {
+          console.log('[addCodeToChat] 面板创建失败，退出');
+          return;
+        }
       }
 
       // 发送代码上下文
+      console.log('[addCodeToChat] 准备发送代码到面板');
       setTimeout(() => {
-        if (panel?.webview) {
-          panel.webview.postMessage({
-            command: 'addCodeContext',
-            fileName,
-            startLine,
-            endLine,
-            code: selectedText,
-            languageId: editor.document.languageId
-          });
+        try {
+          if (panel?.webview) {
+            console.log('[addCodeToChat] 发送 addCodeContext 消息');
+            panel.webview.postMessage({
+              command: 'addCodeContext',
+              fileName,
+              startLine,
+              endLine,
+              code: selectedText,
+              languageId: editor.document.languageId
+            });
+          }
+        } catch (e) {
+          console.log('[addCodeToChat] 发送消息失败:', e);
         }
-      }, 300);
+      }, 500);
     }
   );