Add a button to copy a hand's situation as an AI prompt

Reviews and replays get a "copy for AI" button that builds a text
describing the hand (stacks, positions, actions, pots, board, revealed
cards, result and the site's own judgments) plus questions, ready to
paste into an AI chat. Hidden opponent cards are left out so the
evaluation is based only on what Hero could see.

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

test/review.test.js

@@ -364,3 +364,47 @@ test('レビュー付きCPU戦: 作成者だけが座れ、ハンドごとにレ
   assert.equal(saved.hands.length, 1);
   assert.equal(await reviews.get('../etc/passwd'), null);
 });
+
+test('AI に質問する文章: Hero に見えていた情報だけでハンドの状況を書く', () => {
+  const { buildHandPrompt } = require('../server/review/prompt');
+  const cardText = (c) => c[0] + { s: '♠', h: '♥', d: '♦', c: '♣' }[c[1]];
+
+  // 全員が降りて終わる（ショーダウンなし）: 相手の手札は書かない
+  {
+    const t = makeTable(3);
+    const h = t.hand;
+    act(t, 'raise', 30); // BTN
+    act(t, 'fold'); // SB
+    act(t, 'fold'); // BB
+    const btn = h.button;
+    const rec = analyzeHand(h, btn, { iterations: 100 });
+    const text = buildHandPrompt(rec);
+    assert.match(text, new RegExp(rec.hero.cards.map(cardText).join(' ')));
+    assert.match(text, /BTN（Hero・私）: レイズ to \$30/);
+    assert.match(text, /ショーダウンなし/);
+    for (const p of rec.players) {
+      if (p.seat === btn) continue;
+      assert.ok(!text.includes(p.cards.map(cardText).join(' ')), '公開されていない手札を書かない');
+    }
+  }
+
+  // ショーダウンまで行く: 場札と公開された手札を書く
+  {
+    const t = makeTable(2);
+    const h = t.hand;
+    for (let g = 0; g < 100 && !h.finished; g++) {
+      if (h.toAct == null) {
+        h.runoutStep();
+        continue;
+      }
+      const o = h.options(h.toAct);
+      act(t, o.canCheck ? 'check' : 'call');
+    }
+    const rec = analyzeHand(h, 0, { iterations: 100 });
+    const text = buildHandPrompt(rec);
+    assert.ok(text.includes(`リバー: ${cardText(rec.board[4])}`));
+    const villain = rec.players.find((p) => p.seat !== 0);
+    assert.ok(text.includes(villain.cards.map(cardText).join(' ')));
+    assert.match(text, /## 質問/);
+  }
+});