feat(accounts): fresh accounts implementation

app/Domains/Accounts/Models/UserSetting.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Domains\Accounts\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * One preference belonging to a staff account.
+ *
+ * The store mirrors the company one, addressed by a `key` column instead of an
+ * `option` column. The sentinel value "default" on the `language` key means
+ * "follow the company", so promoting a member never freezes a copy of the
+ * inviter's language.
+ */
+class UserSetting extends Model
+{
+    use HasFactory;
+
+    protected $table = 'user_settings';
+
+    protected $guarded = ['id'];
+
+    /**
+     * Account this preference belongs to.
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}