feat(admin): IP pool allocation, billing exports, service attachments

- IP pool: sheet import (xlsx/csv) matched by address, bulk allocate/revoke
  with notification email (ip_allocated/ip_revoked), ip_pool_logs history.
- Orders/invoices: Excel export on branded template (BrandedReportWriter),
  shared billing filters, order item service info in list responses.
- Web design quote Excel export; activity log export.
- Service attachments with copy-to-invoice; deployment invoice attachments.
- Customer email attachments stored on disk and attached by path.
- Admin password change endpoint; user.fullname backfill migration;
  orders.user_id backfill from logs.
- Disable deploy workflow until CI/CD is set up.
- Ignore stored customer email and service attachment uploads.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Services/Customer/CustomerMailService.php

@@ -16,6 +16,7 @@ use App\Services\Customer\Concerns\ResolvesCustomer;
 use App\Services\Email\EmailTemplateRenderer;
 use App\Support\AutoEmailGate;
 use App\Support\EmailRecipients;
+use App\Support\MailAttachments;
 use App\Support\MailGlobals;
 use App\Support\MailPlaceholders;
 use Illuminate\Support\Facades\DB;
@@ -165,6 +166,8 @@ class CustomerMailService
 
         abort_if($to === [], 422, 'Không có địa chỉ email nhận hợp lệ.');
 
+        $files = MailAttachments::store($data['attachments'] ?? [], "customer-emails/{$customer->id}");
+
         $mailer = Mail::to($to);
         if ($cc !== []) {
             $mailer->cc($cc);
@@ -173,8 +176,8 @@ class CustomerMailService
             $mailer->bcc($bcc);
         }
         $mailer->send($template
-            ? new GenericTemplateMail($subject, $message, array_diff_key($template->mailConfig(), array_flip(['cc', 'bcc'])))
-            : new ManualCustomerEmail($subject, $message, wrapLayout: (bool) ($data['with_layout'] ?? true)));
+            ? new GenericTemplateMail($subject, $message, array_diff_key($template->mailConfig(), array_flip(['cc', 'bcc'])), storedFiles: $files)
+            : new ManualCustomerEmail($subject, $message, wrapLayout: (bool) ($data['with_layout'] ?? true), storedFiles: $files));
 
         MailLog::create([
             'template_id' => $template->id ?? 0,