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>

database/migrations/2026_03_20_150001_create_store_clients_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::create('store_clients', function (Blueprint $table) {
+            $table->id();
+            $table->string('site_url', 512)->unique();
+            $table->string('site_name', 255)->default('');
+            $table->string('access_token', 120)->unique();
+            $table->string('status', 32)->default('online');
+            $table->unsignedInteger('user_count')->default(0);
+            $table->string('typecho_version', 32)->default('');
+            $table->string('php_version', 32)->default('');
+            $table->string('plugin_version', 32)->default('');
+            $table->string('last_ip', 45)->default('');
+            $table->string('last_user_agent', 512)->default('');
+            $table->dateTime('registered_at')->useCurrent();
+            $table->dateTime('last_seen_at')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('store_clients');
+    }
+};

database/migrations/2026_03_20_180001_create_store_settings_table.php

@@ -0,0 +1,23 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('store_settings', function (Blueprint $table) {
+            $table->id();
+            $table->string('key', 120)->unique();
+            $table->text('value')->default('');
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('store_settings');
+    }
+};