Remove app/Space folder and extract model business logic into services

Relocate all 14 files from the catch-all app/Space namespace into proper
locations: data providers to Support/Formatters, installation utilities to
Services/Installation, PDF utils to Services/Pdf, module/update classes to
Services/Module and Services/Update, SiteApi trait to Traits, and helpers
to Support.

Extract ~1,400 lines of business logic from 8 fat models (Invoice, Payment,
Estimate, RecurringInvoice, Company, Customer, Expense, User) into 9 new
service classes with constructor injection. Controllers now depend on
services instead of calling static model methods. Shared item/tax creation
logic consolidated into DocumentItemService.

app/Services/Backup/BackupConfigurationFactory.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Services\Backup;
+
+use App\Models\CompanySetting;
+use App\Models\FileDisk;
+use Exception;
+use Spatie\Backup\Config\Config;
+
+class BackupConfigurationFactory
+{
+    public static function make($data = []): Config
+    {
+        if (blank($data['company'] ?? null)) {
+            throw new Exception('The Company ID is missig');
+        }
+
+        if (blank($data['file_disk_id'] ?? null)) {
+            throw new Exception('No file disk selected');
+        }
+
+        $fileDisk = FileDisk::find($data['file_disk_id']);
+
+        $fileDisk->setConfig();
+
+        $prefix = env('DYNAMIC_DISK_PREFIX', 'temp_');
+
+        config(['backup.backup.destination.disks' => [$prefix.$fileDisk->driver]]);
+
+        $companyNotificationEmail = CompanySetting::getSetting('notification_email', $data['company']);
+
+        if ($companyNotificationEmail) {
+            config(['backup.notifications.mail.to' => $companyNotificationEmail]);
+        }
+
+        $config = Config::fromArray(config('backup'));
+
+        return $config;
+    }
+}