Rewrites the i18n system introduced in PR #94 to use Next.js App Router
[locale] dynamic segments with SSR-rendered translations and proper
middleware locale routing.
- Add middleware locale detection: / rewrites to /zh-CN/ internally,
/en and /ja pass through, /zh-CN/... redirects to bare path
- Move all 7 pages under app/[locale]/ with SSR translation injection
- Fix server→client serialization: pre-evaluate function-valued
translations (makeSerializable) to eliminate hydration flash
- Fix language switch key flash: use hard navigation with localStorage-
only persistence, avoiding React state update before page reload
- Add <link rel="alternate" hreflang> tags for multilingual SEO
- Fix Supabase setAll overwriting locale rewrite response
- Trim locales from 22 to 3 (zh-CN/en/ja), delete 19 incomplete files
- LLM-translate 240 firstact game preset JSONs (en + ja, landscape +
portrait) and story titles via gemini-3.5-flash
- Delete 11 one-off migration scripts and outdated i18n docs
- Add useLocalePath hook and navigation utilities
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- New client-side i18n via React Context (useI18n, tArray, I18nProvider)
- Catalog ships 21 locale stubs; only zh-CN/en/ja have reviewed translations
- Header language switcher (globe icon + short label) before settings gear
- All hardcoded Chinese UI text migrated to keys: typewriter, options,
hints (with embedded gear icon via dangerouslySetInnerHTML), settings
panel, footer/about, play page hints
- AI output language follows user-selected locale via trailing one-liner
directive appended to Architect/Writer/CharacterDesigner/InsertBeat
user messages (preserves system-prompt cacheability)
- Per-locale separator rule: zh uses middot between every glyph; en/ja
use plain spaces
- Option value → i18n key suffix maps preserve Chinese as the underlying
identifier so analytics unions and STYLE_MAP keys stay byte-stable
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
yuanzonghao
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