feat: implement discount and transport features in the quote system

- Added maximum discount settings configurable by the administrator.
- Implemented discount calculations in the quote confirmation process.
- Introduced transport options with associated costs, including handling for exceeding maximum piece limits.
- Updated frontend to display discounts and transport information in the quote summary.
- Created new database migrations for storing discount and transport settings.
- Developed a new Filament page for managing global discount settings.
- Enhanced email templates to include discount and transport details.
- Added tests to ensure proper functionality of discounts and transport calculations.

backoffice/app/Filament/Resources/PreventivoResource.php

@@ -145,7 +145,28 @@ class PreventivoResource extends Resource
                         ->label('Stato')
                         ->badge()
                         ->formatStateUsing(fn (string $state) => Preventivo::STATI[$state] ?? $state),
-                    Infolists\Components\TextEntry::make('totale')->label('Totale')->money('EUR'),
+                    Infolists\Components\TextEntry::make('subtotale')
+                        ->label('Totale parziale')
+                        ->money('EUR')
+                        ->visible(fn (Preventivo $record) => $record->haSconti()),
+                    Infolists\Components\TextEntry::make('sconti')
+                        ->label('Sconti applicati')
+                        ->visible(fn (Preventivo $record) => $record->haSconti())
+                        ->state(function (Preventivo $record): string {
+                            $importi = $record->importiSconto();
+                            $euro = fn (float $v) => '€ '.number_format($v, 2, ',', '.');
+
+                            return sprintf('1° sconto %s%% (−%s) · extra %s%% (−%s)',
+                                (float) $record->sconto_1, $euro($importi['sconto_1']),
+                                (float) $record->sconto_2, $euro($importi['sconto_2']));
+                        }),
+                    Infolists\Components\TextEntry::make('trasporto_etichetta')
+                        ->label('Trasporto')
+                        ->visible(fn (Preventivo $record) => $record->trasporto !== null)
+                        ->formatStateUsing(fn (string $state, Preventivo $record) => $record->trasportoDaQuantificare()
+                            ? "{$state} — da quantificare"
+                            : $state.' — € '.number_format($record->trasporto_importo, 2, ',', '.')),
+                    Infolists\Components\TextEntry::make('totale')->label('Totale (IVA esclusa)')->money('EUR'),
                     Infolists\Components\TextEntry::make('confirmed_at')->label('Confermato il')->dateTime('d/m/Y H:i')->placeholder('—'),
                     Infolists\Components\TextEntry::make('created_at')->label('Creato il')->dateTime('d/m/Y H:i'),
                 ]),