feat: 增强环境配置与开发服务，支持局域网访问及币种管理

tests/Feature/PublicCurrencyIndexTest.php

@@ -0,0 +1,41 @@
+<?php
+
+use App\Models\Currency;
+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 currency index returns enabled currencies with decimal places', function () {
+    Currency::query()->create([
+        'code' => 'JPY',
+        'name' => 'Japanese Yen',
+        'decimal_places' => 0,
+        'is_enabled' => true,
+        'is_bettable' => false,
+    ]);
+
+    Currency::query()->create([
+        'code' => 'TEST',
+        'name' => 'Disabled Currency',
+        'decimal_places' => 4,
+        'is_enabled' => false,
+        'is_bettable' => false,
+    ]);
+
+    $response = $this->getJson('/api/v1/currencies');
+
+    $response->assertOk()
+        ->assertJsonPath('code', ErrorCode::Success->value)
+        ->assertJsonCount(3, 'data.items')
+        ->assertJsonPath('data.items.0.code', 'NPR')
+        ->assertJsonPath('data.items.0.decimal_places', 2)
+        ->assertJsonPath('data.items.1.code', 'JPY')
+        ->assertJsonPath('data.items.1.decimal_places', 0)
+        ->assertJsonPath('data.items.2.code', 'USD');
+});