feedback7 stats: the local statistics page, ported from PR #323 by @2321Robin as submitted (record store ui/stats.js, viewer screens/stats.js, stats.css, entries on the title / lobby / room screens, 20 tests); golden: unchanged

- public/js/ui/stats.js: one record per finished match in localStorage (sp.pref.stats, envelope {v, records}, at most
  1000, quota shrink of the oldest), content-id dedupe of the lobby's result replay, a MIGRATIONS chain and
  normalizeRecord (defaults for missing fields, unknown fields kept, a newer envelope refused), merge-by-id export /
  import, aggregateStats.
- public/js/screens/stats.js: the viewer (总览 / 策略 / 称号 / 战斗累计 / 最近对局, a row re-views that match's
  settlement), 导出 / 导入 / 清空.
- Applied from the PR's own diff after reading it in full (no network, no new dependency, server untouched); only the
  UI strings of the page are added to the four packs (en from the PR; ja / ko / zh-TW translated for this commit).
- The follow-up commits rework the page (the counting rule for matches left early, storage bounds, the layout).
- Tests: test/ui/stats.test.js 20 / 20; i18n extract 0, check --all --strict clean.

public/i18n/zh-TW.json

@@ -1059,5 +1059,46 @@
   "游戏数据没有载入": "遊戲資料沒有載入",
   "{files} 没有下载成功，这一页无法显示；已保存的设置不受影响。请刷新页面；仍不行时，请检查广告拦截插件和网络。": "{files} 沒有下載成功，這一頁無法顯示；已儲存的設定不受影響。請重新整理頁面；仍不行時，請檢查廣告攔截擴充功能和網路。",
   "全员无伤！": "全員無傷！",
-  "生命值减少 −{n}": "生命值減少 −{n}"
+  "生命值减少 −{n}": "生命值減少 −{n}",
+  "统计数据": "統計資料",
+  "统计": "統計",
+  "对局进行中，暂不能回看历史结算": "對局進行中，暫時無法回看歷史結算",
+  "总览": "總覽",
+  "总局数": "總局數",
+  "胜场": "勝場",
+  "胜率": "勝率",
+  "到达隐秘核心": "到達隱秘核心",
+  "通关隐秘核心": "通關隱秘核心",
+  "最远回合": "最遠回合",
+  "累计时长": "累計時長",
+  "{n} 分": "{n} 分",
+  "难度": "難度",
+  "局数": "局數",
+  "隐秘核心通关": "隱秘核心通關",
+  "使用局数": "使用局數",
+  "通过局数": "通過局數",
+  "通过率": "通過率",
+  "称号": "稱號",
+  "战斗累计": "戰鬥累計",
+  "最近对局": "最近對局",
+  "时间": "時間",
+  "模式": "模式",
+  "结果": "結果",
+  "点击查看该局结算": "點擊查看該局結算",
+  "单人": "單人",
+  "同盟": "同盟",
+  "胜": "勝",
+  "负": "負",
+  "点击任意一行，回看该局结算。": "點擊任一行，回看該局結算。",
+  "已导出 {n} 条对局记录": "已匯出 {n} 筆對局記錄",
+  "已导入 {added} 条记录{tail}": "已匯入 {added} 筆記錄{tail}",
+  "（跳过重复 {skipped} 条）": "（略過重複 {skipped} 筆）",
+  "没有新记录（全部与现有数据重复）": "沒有新記錄（全部與現有資料重複）",
+  "导入失败：不是有效的统计导出文件": "匯入失敗：不是有效的統計匯出檔案",
+  "已清空本机统计数据": "已清空本機統計資料",
+  "确认清空？": "確認清空？",
+  "本机数据 · 仅记录本浏览器中你参与的对局": "本機資料 · 僅記錄本瀏覽器中你參與的對局",
+  "检测到更新版本的统计数据，请先升级客户端再查看，以免覆盖数据。": "偵測到更新版本的統計資料，請先升級用戶端再查看，以免覆蓋資料。",
+  "还没有记录 —— 完成一局对局后，这里会开始积累。": "還沒有記錄 —— 完成一局對局後，這裡會開始累積。",
+  "未知": "未知"
 }