fix(vscode-ide-companion): improve message logging and permission handling

- Increase message logging truncation limit from 500 to 1500 characters
- Fix permission option mapping logic for reject_once/cancel options
- Add TODO comments for diff accept/cancel responses during permission requests

Resolves issues with permission handling and improves debugging capabilities.

packages/vscode-ide-companion/src/webview/utils/envUtils.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright 2025 Qwen Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export function isDevelopmentMode(): boolean {
+  // TODO: 调试用
+  return false;
+  // return (
+  //   process.env.NODE_ENV === 'development' ||
+  //   process.env.DEBUG === 'true' ||
+  //   process.env.NODE_ENV !== 'production'
+  // );
+}