feat: i18n 11 languages + website update + fix #139 #140 #141

i18n:
- Add 9 new locale files (ja/ko/de/es/fr/pt/ru/vi/zh-TW)
- Add multilingual README files for all 11 languages
- Add locale helper, index, and modular translation system
- Add translation generation scripts

Website (docs/index.html):
- Replace 公益AI接口 branding with 晴辰云AI接口
- Remove OpenClaw 独立安装包 promotion block
- Update SEO meta tags (description, keywords, OG, Twitter, JSON-LD)
- Add 11-language README links to footer
- Update 元宝派 link to new URL

Bug fixes:
- fix(cron): delivery format mode:'push' → mode:'announce', remove invalid 'to' field (fixes #141)
- fix(cron): allow single-channel users to select delivery channel
- fix(cron): preserve delivery field in job state for editing
- fix(models): add 'ollama' as recognized API type, prevent overwriting native ollama config (fixes #140)
- fix(models): skip /v1 append for ollama native API baseUrl
- fix(assistant): normalize 'google-generative-ai' consistently, add ollama hints
- fix(version): use CLI path classification for source detection on Windows (fixes #139)
- fix(version): default to 'official' instead of 'chinese' when source unknown
- fix(version): reorder npm global package check based on active CLI

scripts/translations/ja/usage.json

@@ -0,0 +1,41 @@
+{
+  "title": "使用状況",
+  "desc": "モデル使用量とトークン統計を表示",
+  "totalTokens": "合計トークン",
+  "totalRequests": "合計リクエスト",
+  "totalCost": "合計コスト",
+  "period": "期間",
+  "today": "今日",
+  "week": "今週",
+  "month": "今月",
+  "all": "全期間",
+  "noData": "使用データなし",
+  "model": "モデル",
+  "tokens": "トークン",
+  "requests": "リクエスト",
+  "cost": "コスト",
+  "inputTokens": "入力トークン",
+  "outputTokens": "出力トークン",
+  "avgTokens": "平均トークン",
+  "lastUsed": "最終使用",
+  "refreshing": "更新中...",
+  "loadFailed": "使用データの読み込みに失敗",
+  "byModel": "モデル別",
+  "byAgent": "Agent 別",
+  "byDate": "日付別",
+  "export": "エクスポート",
+  "exportCsv": "CSV エクスポート",
+  "chart": "チャート",
+  "table": "テーブル",
+  "percentage": "割合",
+  "rank": "ランク",
+  "agent": "Agent",
+  "date": "日付",
+  "noUsageYet": "使用記録がありません",
+  "providerBreakdown": "プロバイダー内訳",
+  "tokenBreakdown": "トークン内訳",
+  "requestTrend": "リクエスト傾向",
+  "costEstimate": "コスト見積もり",
+  "free": "無料",
+  "unknown": "不明"
+}