fix: 修复 ICViewProvider 中的事件监听器内存泄漏问题

将 webview.onDidReceiveMessage 监听器添加到 context.subscriptions 中，
   确保在扩展停用时能够正确清理，避免潜在的内存泄漏。

src/views/ICViewProvider.ts

@@ -160,13 +160,17 @@ export class ICViewProvider implements vscode.WebviewViewProvider {
     });
 
     // 处理侧边栏的消息
-    webviewView.webview.onDidReceiveMessage((message) => {
-      if (message.command === "openChat") {
-        vscode.commands.executeCommand("ic-coder.openChat");
-      } else if (message.command === "login") {
-        vscode.commands.executeCommand("ic-coder.login");
-      }
-    });
+    webviewView.webview.onDidReceiveMessage(
+      (message) => {
+        if (message.command === "openChat") {
+          vscode.commands.executeCommand("ic-coder.openChat");
+        } else if (message.command === "login") {
+          vscode.commands.executeCommand("ic-coder.login");
+        }
+      },
+      undefined,
+      this.context.subscriptions
+    );
   }
 
   private getWebviewContent(