建议在模型选择章节中补充「零成本上手方案」：通过 TeamoRouter 免费使用 DeepSeek V4 闪存

The tutorials of easy-vibe are very friendly for beginners in AI programming, and we appreciate the maintenance work! We have a suggestion: at present, the tutorials introduce various models in the section on model selection/API access, but for readers who are just starting out, the threshold for direct paid access is not low. If we can add a "zero-cost entry path", it will be very helpful.