E-Mail-Praeferenzen: Opt-out je Mail-Typ + One-Click-Unsubscribe ohne Login

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_07_10_154103_create_email_notification_opt_outs_table.php

@@ -0,0 +1,31 @@
+<?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('email_notification_opt_outs', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->cascadeOnDelete();
+            $table->string('type', 64);
+            $table->timestamps();
+
+            $table->unique(['user_id', 'type']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('email_notification_opt_outs');
+    }
+};