Full-Site SEO Optimization: hreflang & Core Web Vitals Fixed
Fixed robots.txt + rewrote sitemap.xml (28 URLs), added SEO metadata to 26 pages, launched hreflang tags (zh-CN+x-default), fixed Core Web Vitals (width/height on 5 QR codes, removed redundant Google Fonts).
📝 Full diary content is available in Chinese. English translation of the body will be added soon.
Original Chinese diary entry preserved for historical record.