feat: add settings table and Setting model

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Models/Setting.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Setting extends Model
+{
+    protected $fillable = ['key', 'value'];
+
+    public static function get(string $key, mixed $default = null): mixed
+    {
+        $setting = static::where('key', $key)->first();
+        return $setting ? $setting->value : $default;
+    }
+
+    public static function set(string $key, mixed $value): void
+    {
+        static::updateOrCreate(['key' => $key], ['value' => $value]);
+    }
+}

database/migrations/2026_05_19_100058_create_settings_table.php

@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('settings', function (Blueprint $table) {
+            $table->id();
+            $table->string('key')->unique();
+            $table->text('value')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('settings');
+    }
+};