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>

public/table.html

@@ -27,11 +27,18 @@
           <svg class="i i-fill icon-pause" viewBox="0 0 24 24" aria-hidden="true"><rect x="6.5" y="5" width="4" height="14" rx="1.3"/><rect x="13.5" y="5" width="4" height="14" rx="1.3"/></svg>
           <svg class="i i-fill icon-play" viewBox="0 0 24 24" aria-hidden="true"><path d="M8 5.6v12.8a1 1 0 0 0 1.5.86l10.2-6.4a1 1 0 0 0 0-1.72L9.5 4.74A1 1 0 0 0 8 5.6z"/></svg>
         </button>
+        <button class="glass-btn" id="seating-open" aria-label="席順を変更" title="席順を変更">
+          <svg class="i" viewBox="0 0 24 24" aria-hidden="true"><path d="M7.5 20V5M4 8.5L7.5 5 11 8.5M16.5 4v15M13 15.5l3.5 3.5 3.5-3.5"/></svg>
+          <span class="glass-dot" id="seating-dot" hidden></span>
+        </button>
       </span>
       <!-- レビュー付きCPU戦のみ -->
       <button class="glass-btn" id="review-open" aria-label="直前のハンドのレビュー" title="直前のハンドのレビュー" hidden>
         <svg class="i" viewBox="0 0 24 24" aria-hidden="true"><path d="M14 3H7.5A2.5 2.5 0 0 0 5 5.5v13A2.5 2.5 0 0 0 7.5 21h9a2.5 2.5 0 0 0 2.5-2.5V8z"/><path d="M14 3v5h5M9 13h6M9 17h4"/></svg>
       </button>
+      <button class="glass-btn" id="ranking-open" aria-label="ランキング" title="ランキング">
+        <svg class="i" viewBox="0 0 24 24" aria-hidden="true"><path d="M8 4h8v5a4 4 0 0 1-8 0z"/><path d="M8 5.5H5.5v1A3 3 0 0 0 8 9.5M16 5.5h2.5v1A3 3 0 0 1 16 9.5M12 13v3.5M8.5 20h7M9.5 20l.5-3.5h4l.5 3.5"/></svg>
+      </button>
       <button class="glass-btn" id="share" aria-label="サイトのリンクをコピー" title="サイトのリンクをコピー">
         <svg class="i" viewBox="0 0 24 24" aria-hidden="true"><path d="M10 14a4.5 4.5 0 0 0 6.4 0l3-3a4.5 4.5 0 0 0-6.4-6.4l-1.2 1.2"/><path d="M14 10a4.5 4.5 0 0 0-6.4 0l-3 3a4.5 4.5 0 0 0 6.4 6.4l1.2-1.2"/></svg>
       </button>
@@ -150,6 +157,54 @@
     </div>
   </div>
 
+  <!-- 席順の変更（ホストのみ）。自分から時計回りの並びを、行をつかんで並べ替える -->
+  <div class="sheet-backdrop" id="seating-modal" hidden>
+    <div class="sheet seating-sheet" role="dialog" aria-modal="true" aria-labelledby="seating-title" tabindex="-1">
+      <div class="sheet-header" data-sheet-drag>
+        <span class="sheet-grabber" aria-hidden="true"></span>
+        <h2 class="sheet-title" id="seating-title">席順を変更</h2>
+      </div>
+      <div class="sheet-scroll">
+        <div class="seating-preview" id="seating-preview" aria-hidden="true"><div class="seating-felt"></div></div>
+        <div class="seating-tools">
+          <p class="hint" id="seating-note">右端のつまみをつかんで並べ替えます。上から時計回り（あなたの左隣から）に座ります。</p>
+          <button type="button" class="btn btn-sm" id="seating-shuffle">
+            <svg class="i" viewBox="0 0 24 24" aria-hidden="true"><path d="M4 7h3.5c4.5 0 4.5 10 9 10H20M4 17h3.5c1.6 0 2.6-1.2 3.4-2.8M13.1 9.8C13.9 8.2 14.9 7 16.5 7H20M17.5 4.5 20 7l-2.5 2.5M17.5 14.5 20 17l-2.5 2.5"/></svg>シャッフル
+          </button>
+        </div>
+        <ol class="list seating-list" id="seating-list"></ol>
+        <p class="hint seating-pending" id="seating-pending" hidden></p>
+      </div>
+      <div class="sheet-footer">
+        <div class="btn-row">
+          <button type="button" class="btn btn-lg" id="seating-cancel">キャンセル</button>
+          <button type="button" class="btn btn-tint btn-lg" id="seating-save">この順に座る</button>
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <!-- テーブル内のランキング（スタック順・収支順を切り替える） -->
+  <div class="sheet-backdrop" id="ranking-modal" hidden>
+    <div class="sheet ranking-sheet" role="dialog" aria-modal="true" aria-labelledby="ranking-title" tabindex="-1">
+      <div class="sheet-header" data-sheet-drag>
+        <span class="sheet-grabber" aria-hidden="true"></span>
+        <h2 class="sheet-title" id="ranking-title">ランキング</h2>
+      </div>
+      <div class="sheet-scroll">
+        <div class="segmented" id="ranking-tabs" aria-label="並べ替え">
+          <button type="button" class="seg-btn active" data-rank="stack" aria-pressed="true">スタック</button>
+          <button type="button" class="seg-btn" data-rank="net" aria-pressed="false">収支</button>
+        </div>
+        <ol class="list ranking-list mt-12" id="ranking-list"></ol>
+        <p class="hint ranking-note" id="ranking-note"></p>
+      </div>
+      <div class="sheet-footer">
+        <button type="button" class="btn btn-lg btn-block" id="ranking-close">閉じる</button>
+      </div>
+    </div>
+  </div>
+
   <!-- 直前のハンドのレビュー（下から出るシート。つまみを下へ払うと閉じる） -->
   <div class="sheet-backdrop" id="review-modal" hidden>
     <div class="sheet review-sheet" role="dialog" aria-modal="true" aria-labelledby="review-title" tabindex="-1">
@@ -163,7 +218,7 @@
           <svg class="i" viewBox="0 0 24 24" aria-hidden="true"><path d="M10 3.5l1.6 4.4L16 9.5l-4.4 1.6L10 15.5l-1.6-4.4L4 9.5l4.4-1.6z"/><path d="M18 14l.8 2.2L21 17l-2.2.8L18 20l-.8-2.2L15 17l2.2-.8z"/></svg>AIに質問する用にコピー
         </button>
         <div class="list mt-12">
-          <a class="cell cell-link" id="review-link" href="/review" target="_blank" rel="noopener">
+          <a class="cell cell-link" id="review-link" href="/review">
             <span class="cell-title">対局全体のレビュー<span class="cell-sub">点数表・成績・リプレイ</span></span>
             <svg class="i chevron" viewBox="0 0 24 24" aria-hidden="true"><path d="M9 5l7 7-7 7"/></svg>
           </a>