feat: 增强开奖与设置控制器的币种支持功能

引入 CurrencyResolver，用于在 DrawCurrentController、DrawResultShowController 与 DrawResultsIndexController 中统一处理币种代码解析。
更新 DrawHallSnapshotBuilder 与 DrawResultViewService 的构建方法，新增币种代码参数支持，确保开奖相关功能中的币种处理一致性。
增强 SettingIndexController：新增允许访问的 KV 配置分组校验。
在 OddsStreamService、PlayConfigStreamService 与 RiskCapStreamService 中新增广播功能，用于在玩法目录变更时推送更新通知。
新增测试用例，验证风险限额发布的广播行为。

tests/Feature/PlayerRealtimeBroadcastTest.php

@@ -1,8 +1,10 @@
 <?php
 
 use App\Events\BalanceUpdateBroadcast;
+use App\Events\PlayCatalogUpdatedBroadcast;
 use App\Events\RiskSoldOutBroadcast;
 use App\Events\RiskWarningBroadcast;
+use App\Services\Config\RiskCapStreamService;
 use App\Models\Draw;
 use App\Models\Player;
 use App\Models\PlayerWallet;
@@ -101,6 +103,31 @@ test('risk pool acquire dispatches warning and sold out broadcasts', function ()
     );
 });
 
+test('risk cap publish dispatches play catalog updated broadcast', function (): void {
+    Event::fake([PlayCatalogUpdatedBroadcast::class]);
+
+    $admin = \App\Models\AdminUser::query()->create([
+        'username' => 'risk_cap_admin',
+        'name' => 'Risk Cap QA',
+        'email' => null,
+        'password' => \Illuminate\Support\Facades\Hash::make('secret-strong'),
+        'status' => 0,
+    ]);
+    grantSuperAdminRole($admin);
+
+    $draft = app(RiskCapStreamService::class)->createDraft($admin, 'test', null);
+    app(RiskCapStreamService::class)->replaceItems($draft, [
+        [
+            'normalized_number' => '1234',
+            'cap_amount' => 1_000_000,
+            'cap_type' => 'default',
+        ],
+    ], $admin);
+    app(RiskCapStreamService::class)->publish($draft, $admin);
+
+    Event::assertDispatched(PlayCatalogUpdatedBroadcast::class);
+});
+
 test('transfer in dispatches balance update after success', function (): void {
     Event::fake([BalanceUpdateBroadcast::class]);
 

tests/Feature/PublicSettingsApiTest.php

@@ -0,0 +1,37 @@
+<?php
+
+use App\Lottery\ErrorCode;
+use Database\Seeders\CurrencySeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function (): void {
+    $this->seed(CurrencySeeder::class);
+});
+
+test('public settings requires allowed group', function (): void {
+    $this->getJson('/api/v1/settings')
+        ->assertStatus(400)
+        ->assertJsonPath('code', ErrorCode::ClientHttpError->value);
+
+    $this->getJson('/api/v1/settings?group=wallet')
+        ->assertStatus(400)
+        ->assertJsonPath('code', ErrorCode::ClientHttpError->value);
+});
+
+test('public settings returns frontend group only', function (): void {
+    \App\Models\LotterySetting::query()->updateOrCreate(
+        ['setting_key' => 'frontend.play_rules_html_zh'],
+        [
+            'group_name' => 'frontend',
+            'value_json' => '<p>rules</p>',
+            'description_zh' => '规则',
+        ],
+    );
+
+    $this->getJson('/api/v1/settings?group=frontend')
+        ->assertOk()
+        ->assertJsonPath('code', ErrorCode::Success->value)
+        ->assertJsonFragment(['key' => 'frontend.play_rules_html_zh']);
+});