前端极简黑白重设计,并纳入客户端注册、站点设置与后台相关改动

- storefront 全站改为极简黑白配色:直角、细线分隔、卡片 hover 浅底、深色模式(跟随系统+手动切换)
- 抽出 storefront/partials/card 复用卡片
- 一并提交此前暂存的客户端注册 API、站点设置、后台页面与测试

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/Feature/WebAdminSettingsPageTest.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class WebAdminSettingsPageTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_authenticated_admin_can_update_storefront_settings(): void
+    {
+        $user = User::factory()->create();
+
+        $payload = [
+            'site_name' => 'Team Store',
+            'site_tagline' => 'Custom Extension Catalog',
+            'home_title_suffix' => '自定义副标题',
+            'home_eyebrow' => 'Custom Eyebrow',
+            'home_headline' => '自定义首页标题',
+            'home_lede' => '这里是自定义首页说明。',
+            'home_aside_kicker' => 'Custom Aside',
+            'home_aside_title' => '自定义侧栏标题',
+            'home_feature_one_title' => '卡片一',
+            'home_feature_one_body' => '卡片一说明',
+            'home_feature_two_title' => '卡片二',
+            'home_feature_two_body' => '卡片二说明',
+            'home_feature_three_title' => '卡片三',
+            'home_feature_three_body' => '卡片三说明',
+            'home_plugins_title' => '插件精选',
+            'home_plugins_subtitle' => '插件区域说明',
+            'home_themes_title' => '主题精选',
+            'home_themes_subtitle' => '主题区域说明',
+        ];
+
+        $this->actingAs($user)
+            ->put('/admin/settings', $payload)
+            ->assertRedirect('/admin/settings')
+            ->assertSessionHas('success', '站点设置已更新');
+
+        $this->assertDatabaseHas('store_settings', [
+            'key' => 'site_name',
+            'value' => 'Team Store',
+        ]);
+
+        $this->get('/')
+            ->assertOk()
+            ->assertSee('Team Store')
+            ->assertSee('自定义首页标题')
+            ->assertSee('插件精选')
+            ->assertSee('主题精选')
+            ->assertSee('<title>Team Store · 自定义副标题</title>', false);
+    }
+}