首页我的收藏 / 最近使用 多语言修复

Fixed an i18n gap on the homepage: the "My Favorites" and "Recently Used" section titles were hardcoded in Chinese and stayed untranslated on the English, Japanese, and Vietnamese versions of the site.

i18n

• The two homepage section titles now follow the active language: "我的收藏" → "My Favorites" / マイお気に入り / Yêu thích của tôi, and "最近使用" → "Recently Used" / 最近使用したツール / Đã dùng gần đây.
• All four locales (Chinese, English, Japanese, Vietnamese) now display these headings correctly.

If you spot any other untranslated text, feel free to report it in the comments below.