feat: implement premium Email 2FA authentication integrated with auth flow

database/migrations/2026_05_21_144200_add_email_two_factor_to_users_table.php

@@ -0,0 +1,28 @@
+<?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::table('users', function (Blueprint $table) {
+            $table->boolean('email_2fa_enabled')->default(false)->after('two_factor_confirmed_at');
+            $table->string('email_2fa_code')->nullable()->after('email_2fa_enabled');
+            $table->timestamp('email_2fa_expires_at')->nullable()->after('email_2fa_code');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropColumn([
+                'email_2fa_enabled',
+                'email_2fa_code',
+                'email_2fa_expires_at',
+            ]);
+        });
+    }
+};