feat(date): enhance date formatting and timezone handling

- Update formatDateTime function to handle timezone-aware date strings directly.
- Introduce utcToBeijingISOString function for consistent Beijing time formatting in ISO string.
- Modify BidsService to utilize the new utcToBeijingISOString for date conversions.
- Add unit tests for AuthGuard to validate API key authentication and access control.
- Create end-to-end tests for API key handling in various scenarios.
- Update .gitignore to exclude 'qingyun' directory.
- Add environment configuration for production settings in .env.production.
- Include Tailwind CSS setup in the uni-app version for styling.

uni-app-version/src/styles/tailwind.css

@@ -0,0 +1,4 @@
+/* Tailwind CSS - 使用 PostCSS 处理，避免 Sass 警告 */
+@tailwind base;
+@tailwind components;
+@tailwind utilities;