Email digital receipts, add promo settings, and apply tips at charge.

Send real receipt emails from the customer display and sale page, store
branch promo content for the idle screen, and fold selected tips into totals.

database/migrations/2026_07_15_190000_add_tip_and_customer_promo_fields.php

@@ -0,0 +1,36 @@
+<?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('pos_sales', function (Blueprint $table) {
+            $table->unsignedInteger('tip_minor')->default(0)->after('loyalty_points_earned');
+        });
+
+        Schema::table('pos_locations', function (Blueprint $table) {
+            $table->string('customer_promo_headline', 160)->nullable()->after('receipt_logo_path');
+            $table->string('customer_promo_body', 500)->nullable()->after('customer_promo_headline');
+            $table->string('customer_promo_image_path')->nullable()->after('customer_promo_body');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('pos_sales', function (Blueprint $table) {
+            $table->dropColumn('tip_minor');
+        });
+
+        Schema::table('pos_locations', function (Blueprint $table) {
+            $table->dropColumn([
+                'customer_promo_headline',
+                'customer_promo_body',
+                'customer_promo_image_path',
+            ]);
+        });
+    }
+};