Add player stats, in-table ranking, host seating and review return

- Stats page (/stats): play style radar (TAG/LAG/rock/fish), VPIP, PFR,
  ATS, 3bet, WTSD, W$SD, WWSF, per-street fold rate, aggression
  frequency, hand win rate and net in BB, per table type, each with a
  bands-and-explanation sheet. Hands are counted per human player when
  they finish and stored as totals under data/stats/, keyed by a hash
  of the player ID (sent in a POST body, never in the URL).
- Ranking sheet at the table: everyone seated, ordered by stack or by
  net (stack minus buy-ins), updating live.
- The host can reorder seats by dragging (with a mini table preview and
  shuffle). Takes effect immediately between hands, otherwise at the
  start of the next hand; the dealer button stays with the same player.
- The full-session review opens in the same tab and its back button
  returns to the table it was opened from.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

admin/review.js

@@ -40,14 +40,26 @@
     return `<span class="pcard suit-${c[1]} ${extra}"><b>${rank}</b><i>${SUIT_SYMBOL[c[1]]}</i></span>`;
   }
 
-  // ---------- 画面の切り替え（URL: ?s=対局ID&h=ハンド番号） ----------
+  // ---------- 画面の切り替え（URL: ?s=対局ID&h=ハンド番号&t=テーブルID） ----------
   function show(view) {
     for (const v of ['list', 'session', 'replay']) $(`view-${v}`).hidden = v !== view;
     window.scrollTo(0, 0);
   }
 
+  // テーブルのレビューから開いたときのテーブルID。どの画面に移っても引き継ぎ、対局の画面からテーブルへ戻れるようにする
+  function fromTable() {
+    const t = new URLSearchParams(location.search).get('t');
+    return t && /^[0-9a-f]{8}$/.test(t) ? t : null;
+  }
+
+  function setBack(href, label) {
+    $('back').href = href;
+    $('back-label').textContent = label;
+  }
+
   function go(params, push = true) {
-    const q = new URLSearchParams(params).toString();
+    const table = fromTable();
+    const q = new URLSearchParams(table ? { ...params, t: table } : params).toString();
     const url = location.pathname + (q ? `?${q}` : '');
     if (push) history.pushState(null, '', url);
     else history.replaceState(null, '', url);
@@ -58,10 +70,11 @@
     const p = new URLSearchParams(location.search);
     const id = p.get('s');
     const hand = Number(p.get('h'));
+    const table = fromTable();
     if (!id) {
       $('title').textContent = 'CPU戦のレビュー';
-      $('back').href = '/';
-      $('back-label').textContent = 'ロビー';
+      if (table) setBack(`/table/${table}`, 'テーブル');
+      else setBack('/', 'ロビー');
       show('list');
       return loadList();
     }
@@ -77,22 +90,21 @@
     if (hand) {
       const h = session.hands.find((x) => x.number === hand);
       if (h) {
-        $('back').href = `?s=${encodeURIComponent(id)}`;
-        $('back-label').textContent = '対局';
+        setBack(`?s=${encodeURIComponent(id)}`, '対局');
         return openReplay(h);
       }
     }
-    $('back').href = '/review';
-    $('back-label').textContent = '一覧';
+    if (table) setBack(`/table/${table}`, 'テーブル');
+    else setBack('/review', '一覧');
     show('session');
     renderSession();
   }
 
   window.addEventListener('popstate', route);
-  // 戻るボタンは履歴を積まずに一つ上へ
+  // 戻るボタンは履歴を積まずに一つ上へ（ロビー・テーブルへはそのままページを移る）
   $('back').addEventListener('click', (e) => {
     const href = $('back').getAttribute('href');
-    if (href === '/') return;
+    if (href === '/' || href.startsWith('/table/')) return;
     e.preventDefault();
     const p = new URLSearchParams(location.search);
     go(p.get('h') ? { s: p.get('s') } : {});