refactor: 迁移彩票设置至 LotterySettings 服务

- 更新多个控制器和服务，使用 LotterySettings 服务获取彩票相关配置，如默认币种、开奖间隔、下注窗口等，提升代码一致性与可维护性。
- 移除 .env.example 中不再使用的配置项，建议通过后台管理进行设置。

app/Services/Draw/DrawHallSnapshotBuilder.php

@@ -10,6 +10,7 @@ use App\Models\DrawResultItem;
 use App\Models\DrawResultBatch;
 use App\Lottery\DrawResultBatchStatus;
 use App\Services\Jackpot\JackpotSummaryService;
+use App\Services\LotterySettings;
 
 /**
  * `GET draw/current` 与大厅 WS 快照共用数据结构。
@@ -237,7 +238,7 @@ final class DrawHallSnapshotBuilder
 
         $effectiveStatus = $this->effectiveHallDisplayStatus($target, $nowUtc);
 
-        $scheduleTz = (string) config('lottery.draw.timezone', 'UTC');
+        $scheduleTz = LotterySettings::drawTimezone();
 
         $payload = [
             'schedule_timezone' => $scheduleTz,
@@ -324,6 +325,6 @@ final class DrawHallSnapshotBuilder
             return $code;
         }
 
-        return strtoupper(substr(trim((string) config('lottery.default_currency', 'NPR')), 0, 16));
+        return LotterySettings::defaultCurrency();
     }
 }

app/Services/Draw/DrawManualCreateService.php

@@ -4,6 +4,7 @@ namespace App\Services\Draw;
 
 use Carbon\Carbon;
 use App\Models\Draw;
+use App\Services\LotterySettings;
 use Illuminate\Support\Facades\DB;
 
 /**
@@ -27,7 +28,7 @@ final class DrawManualCreateService
      */
     public function create(array $input, ?Carbon $now = null): Draw
     {
-        $tz = (string) config('lottery.draw.timezone', 'UTC');
+        $tz = LotterySettings::drawTimezone();
         $nowUtc = ($now ?? Carbon::now())->utc();
 
         $drawLocal = $this->parseInTimezone((string) $input['draw_time'], $tz);

app/Services/Draw/DrawManualUpdateService.php

@@ -6,6 +6,7 @@ use Carbon\Carbon;
 use App\Models\Draw;
 use App\Models\TicketOrder;
 use App\Lottery\DrawStatus;
+use App\Services\LotterySettings;
 use Illuminate\Support\Facades\DB;
 
 /**
@@ -29,7 +30,7 @@ final class DrawManualUpdateService
      */
     public function update(Draw $draw, array $input, ?Carbon $now = null): Draw
     {
-        $tz = (string) config('lottery.draw.timezone', 'UTC');
+        $tz = LotterySettings::drawTimezone();
         $nowUtc = ($now ?? Carbon::now())->utc();
 
         return DB::transaction(function () use ($draw, $input, $tz, $nowUtc): Draw {

app/Services/Draw/DrawPlannerService.php

@@ -5,6 +5,7 @@ namespace App\Services\Draw;
 use Carbon\Carbon;
 use App\Models\Draw;
 use App\Lottery\DrawStatus;
+use App\Services\LotterySettings;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Database\QueryException;
 
@@ -21,9 +22,9 @@ final class DrawPlannerService
     public function ensureBuffer(?Carbon $now = null): array
     {
         $nowUtc = ($now ?? Carbon::now())->utc();
-        $tz = (string) config('lottery.draw.timezone', 'UTC');
-        $interval = (int) config('lottery.draw.interval_minutes', 5);
-        $buffer = (int) config('lottery.draw.buffer_draws_ahead', 8);
+        $tz = LotterySettings::drawTimezone();
+        $interval = LotterySettings::drawIntervalMinutes();
+        $buffer = LotterySettings::drawBufferDrawsAhead();
         $maxSeq = intdiv(24 * 60, $interval);
 
         $upcoming = Draw::query()

app/Services/Draw/DrawPublishService.php

@@ -79,10 +79,7 @@ final class DrawPublishService
 
     private function applyPublishedToDraw(Draw $draw, DrawResultBatch $batch): Draw
     {
-        $cooldownMinutes = max(0, (int) LotterySettings::get(
-            'draw.cooldown_minutes',
-            (int) config('lottery.draw.cooldown_minutes', 15),
-        ));
+        $cooldownMinutes = LotterySettings::drawCooldownMinutes();
         if ($cooldownMinutes > 0) {
             $draw->forceFill([
                 'status' => DrawStatus::Cooldown->value,

app/Services/Draw/DrawResultViewService.php

@@ -9,6 +9,7 @@ use App\Models\DrawResultBatch;
 use Illuminate\Support\Collection;
 use App\Lottery\DrawResultBatchStatus;
 use App\Services\Jackpot\JackpotSummaryService;
+use App\Services\LotterySettings;
 use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 
 /**
@@ -194,6 +195,6 @@ final class DrawResultViewService
             return $code;
         }
 
-        return strtoupper(substr(trim((string) config('lottery.default_currency', 'NPR')), 0, 16));
+        return LotterySettings::defaultCurrency();
     }
 }

app/Services/Draw/DrawRngRunner.php

@@ -28,10 +28,7 @@ final class DrawRngRunner
             'status' => DrawStatus::Drawing->value,
         ])->save();
 
-        $manualReview = (bool) LotterySettings::get(
-            'draw.require_manual_review',
-            (bool) config('lottery.draw.require_manual_review', false),
-        );
+        $manualReview = LotterySettings::drawRequireManualReview();
         $seedHex = DrawRngSeedDerivation::generateSeedHex();
         $rngSeedHash = DrawRngSeedDerivation::hashSeedHex($seedHex);
         $rawSeedEncrypted = DrawRngSeedDerivation::encryptSeedHex($seedHex);

app/Services/Draw/DrawTimelineBuilder.php

@@ -4,6 +4,7 @@ namespace App\Services\Draw;
 
 use Carbon\Carbon;
 use App\Lottery\DrawStatus;
+use App\Services\LotterySettings;
 
 /**
  * 由开奖时刻推导下注窗口、封盘时刻与期号初始状态。
@@ -12,12 +13,12 @@ final class DrawTimelineBuilder
 {
     public function closeBeforeDrawSeconds(): int
     {
-        return (int) config('lottery.draw.close_before_draw_seconds', 30);
+        return LotterySettings::drawCloseBeforeDrawSeconds();
     }
 
     public function bettingWindowSeconds(): int
     {
-        return (int) config('lottery.draw.betting_window_seconds', 270);
+        return LotterySettings::drawBettingWindowSeconds();
     }
 
     /**