feat: Implement price list management and import functionality

- Added ListinoRelationManager for managing price lists associated with models.
- Introduced ImportaListiniAction for importing price lists from Excel files.
- Created ListinoPrezzo model to represent price entries in the database.
- Developed ListinoExcelParser for parsing Excel files containing price lists.
- Implemented ListinoImporter to handle the import logic and associations.
- Added migration for creating listino_prezzi table and converting measures to mm.
- Updated frontend logic to handle new price list features and validations.
- Enhanced tests for price list import and conversion functionalities.

backoffice/tests/Feature/ConversioneMisureMmTest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Modello;
+use App\Models\Preventivo;
+use App\Support\ConfigurazioneFormatter;
+use Database\Seeders\CatalogoSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Artisan;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Storage;
+use Illuminate\Support\Str;
+use Tests\TestCase;
+
+class ConversioneMisureMmTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private const MIGRAZIONE = 'database/migrations/2026_10_19_150000_converti_misure_in_mm.php';
+
+    public function test_la_migrazione_porta_listini_e_preventivi_esistenti_in_mm(): void
+    {
+        Storage::fake('public');
+        $this->seed(CatalogoSeeder::class);
+
+        // Riporta lo schema e i dati allo stato precedente (in cm).
+        Artisan::call('migrate:rollback', ['--path' => self::MIGRAZIONE]);
+
+        $modello = Modello::where('codice', 'finestra_1_anta')->firstOrFail();
+        DB::table('listino_prezzi')->insert(['modello_id' => $modello->id, 'larghezza' => 145, 'altezza' => 40, 'prezzo' => 367.2]);
+        $preventivo = Preventivo::create(['token' => Str::random(40), 'stato' => 'bozza']);
+        $item = $preventivo->items()->create([
+            'nome_modello' => 'Finestra 1 anta',
+            'larghezza' => 80,
+            'altezza' => 120,
+            'payload' => ['width' => '80.00', 'height' => '120.5', 'maniglia' => 'Bianca'],
+        ]);
+
+        Artisan::call('migrate', ['--path' => self::MIGRAZIONE]);
+
+        $this->assertSame([1450, 400], [(int) $modello->listino()->value('larghezza'), (int) $modello->listino()->value('altezza')]);
+
+        $item->refresh();
+        $this->assertSame([800, 1200], [$item->larghezza, $item->altezza]);
+        $this->assertSame(['width' => '800', 'height' => '1205', 'maniglia' => 'Bianca'], $item->payload);
+
+        $righe = collect(ConfigurazioneFormatter::toRows($item->payload))->pluck('value', 'label');
+        $this->assertSame('800', $righe['Larghezza (mm)']);
+    }
+}