优化：百家乐开局公告新增赔率说明

- 动态读取 big_rate / triple_rate / kill_points 配置
- 公告格式变更为：
  「…赔率：🔵大/🟡小 1:1 · 💥豹子 1:24（☠️ 3或18点庄家收割）」

app/Jobs/OpenBaccaratRoundJob.php

@@ -65,7 +65,15 @@ class OpenBaccaratRoundJob implements ShouldQueue
         $minBet = number_format($config['min_bet'] ?? 100);
         $maxBet = number_format($config['max_bet'] ?? 50000);
 
-        $content = "🎲 【百家乐】第 #{$round->id} 局开始！下注时间 {$betSeconds} 秒，可押「大/小/豹子」，押注范围 {$minBet}~{$maxBet} 金币。";
+        $bigRate = (int) ($config['big_rate'] ?? 1);
+        $tripleRate = (int) ($config['triple_rate'] ?? 24);
+        $killPoints = $config['kill_points'] ?? [3, 18];
+        if (! is_array($killPoints)) {
+            $killPoints = explode(',', (string) $killPoints);
+        }
+        $killText = implode('或', array_map('intval', $killPoints));
+
+        $content = "🎲 【百家乐】第 #{$round->id} 局开始！下注时间 {$betSeconds} 秒，押注范围 {$minBet}~{$maxBet} 金币。赔率：🔵大/🟡小 1:{$bigRate} · 💥豹子 1:{$tripleRate}（☠️ {$killText} 点庄家收割）";
         $msg = [
             'id' => $chatState->nextMessageId(1),
             'room_id' => 1,