Add barcode scanner, thermal receipt printing, and printer settings.

Register supports USB keyboard-wedge scanners with SKU lookup (local catalog
and CRM in retail mode). Sales get a thermal receipt print template (58/80mm)
with configurable header/footer, plus optional auto-print after cash sales.

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

database/migrations/2026_07_08_120000_add_receipt_printer_settings_to_pos_locations.php

@@ -0,0 +1,24 @@
+<?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_locations', function (Blueprint $table) {
+            $table->string('receipt_header', 500)->nullable()->after('receipt_footer');
+            $table->unsignedTinyInteger('printer_paper_mm')->default(80)->after('receipt_header');
+            $table->boolean('printer_auto_print')->default(false)->after('printer_paper_mm');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('pos_locations', function (Blueprint $table) {
+            $table->dropColumn(['receipt_header', 'printer_paper_mm', 'printer_auto_print']);
+        });
+    }
+};