Basic Auth 解码 + 首页翻译补漏

Two small but useful updates: the Basic Auth generator now works both ways, and a handful of homepage labels that slipped previous i18n sweeps are finally translated.

Basic Auth: encode and decode

The Basic Auth tool previously only did one thing — turn a username and password into an Authorization: Basic ... header. That's useful, but the opposite direction is just as common: you have a header (or a raw Base64 blob) and want to see what credentials are inside it.

The tool now has an Encode / Decode mode switcher, matching the interaction pattern used across the rest of the toolbox (Base64, URL tools, etc.):

• Encode — enter username and password, get the Authorization header.
• Decode — paste a full Authorization: Basic xxx header or a raw Base64 string, and get the username and password back as separate, copyable fields.

The layout was also reorganized on the same structure as the other converter tools — a proper spacing rhythm, grouped input/output sections, and Stash/Extract buttons so you can push results to or pull inputs from the workspace.

Homepage translation catch-up

A few homepage labels were still showing Chinese in the English, Japanese and Vietnamese versions:

• "我的收藏" (My Favorites) → now translated
• "最近使用" (Recently Used) → now translated
• "用途筛选:" (filter label) → now translated
• "全部" (All) → now translated

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