Refactor code structure for improved readability and maintainability

backoffice/database/migrations/2026_10_19_100000_create_sistemi_table.php

@@ -0,0 +1,26 @@
+<?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::create('sistemi', function (Blueprint $table) {
+            $table->id();
+            // Codice usato dal configuratore nel parametro ?sistema= (es. "pvc").
+            $table->string('codice', 50)->unique();
+            $table->string('nome');
+            $table->unsignedInteger('ordine')->default(0);
+            $table->boolean('attivo')->default(true);
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('sistemi');
+    }
+};

backoffice/database/migrations/2026_10_19_100001_create_modelli_table.php

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+<?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::create('modelli', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('sistema_id')->constrained('sistemi')->cascadeOnDelete();
+            // Codice interno: è anche il ?type= del configuratore.
+            $table->string('codice', 100);
+            // Etichetta mostrata nella lista modelli del configuratore.
+            $table->string('nome');
+            // Descrizione d'ordine (es. "FINESTRA 1 ANTA, A/R").
+            $table->string('descrizione')->nullable();
+            $table->string('icona')->nullable();
+            $table->unsignedInteger('ordine')->default(0);
+            $table->boolean('attivo')->default(true);
+
+            // Configurazione 3D letta dal configuratore.
+            $table->string('cartella')->nullable();
+            $table->string('file_modello')->nullable();
+            $table->string('categoria', 50)->nullable();
+            $table->string('cartella_texture')->nullable();
+            $table->json('moduli')->nullable();
+
+            $table->timestamps();
+
+            $table->unique(['sistema_id', 'codice']);
+            $table->index(['sistema_id', 'attivo', 'ordine']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('modelli');
+    }
+};