Suggestions for XTranslate: Batch URL Import, Performance, and Cache Clearing

[XiaoYingYo]

I have a few suggestions to improve XTranslate:

1. Batch Import for Auto-Translate URLs: I have thousands of URLs that need automatic translation. The current sync storage might be limited for this, so local storage could be a better option for large quantities.
2. O(1) Complexity for URL/Domain Matching: The current logic for determining whether a URL or domain needs automatic translation seems to be O(N). It would be great if this could be optimized to O(1) for better performance.
3. One-Click Cache Clearing Button: Please provide a button to clear the translation cache for the current website with a single click.

Thank you for your consideration!
@ixrock