feat: email gửi tay/nhắc gia hạn, gói hosting, sửa dữ liệu sản phẩm

- Gửi email theo template cho 1 khách, tab lịch sử email, nhắc gia hạn dịch vụ hàng loạt
- Mail lưu from/bcc/sent_by; mẫu MARKETING và mẫu cũ trong TemplateSeeder
- Gói hosting: giới hạn, trạng thái, lấy plan Plesk qua CLI gateway
- Backfill payment_method và ngày đơn hàng còn thiếu
- Bổ sung field CPU/RAM/Disk/Băng thông cho loại sản phẩm vps và cloud

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

app/Http/Controllers/Api/Admin/Customer/Concerns/ListsCustomerEmails.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace App\Http\Controllers\Api\Admin\Customer\Concerns;
+
+use App\Models\Mail;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+trait ListsCustomerEmails
+{
+    public function emails(Request $request, string $uuid): JsonResponse
+    {
+        $customer = $this->resolveCustomer($uuid);
+        $search = trim((string) $request->get('search', ''));
+
+        $paginator = Mail::query()
+            ->with(['sender', 'template:id,name'])
+            ->where('customer_id', $customer->id)
+            ->when($search !== '', fn ($q) => $q->where(fn ($q) => $q
+                ->where('subject', 'like', "%{$search}%")
+                ->orWhere('to', 'like', "%{$search}%")))
+            ->latest('id')
+            ->paginate(min((int) $request->get('per_page', 10), 100), ['id', 'template_id', 'subject', 'from_address', 'to', 'cc', 'bcc', 'sent_by', 'status', 'created_at']);
+
+        return response()->json([
+            'error' => false,
+            'data' => [
+                'items' => $paginator->getCollection()->map($this->mapCustomerEmail(...))->all(),
+                'total' => $paginator->total(),
+                'current_page' => $paginator->currentPage(),
+                'per_page' => $paginator->perPage(),
+            ],
+        ]);
+    }
+
+    public function emailDetail(string $uuid, int $id): JsonResponse
+    {
+        $customer = $this->resolveCustomer($uuid);
+        $mail = Mail::with(['sender', 'template:id,name'])
+            ->where('customer_id', $customer->id)
+            ->find($id);
+
+        if (!$mail) {
+            return response()->json(['error' => true, 'message' => 'Không tìm thấy email'], 404);
+        }
+
+        return response()->json([
+            'error' => false,
+            'data' => [...$this->mapCustomerEmail($mail), 'html' => $mail->message],
+        ]);
+    }
+
+    private function mapCustomerEmail(Mail $mail): array
+    {
+        return [
+            'id' => $mail->id,
+            'subject' => $mail->subject,
+            'from_address' => $mail->from_address,
+            'sent_by' => $mail->sender ? ($mail->sender->name ?: $mail->sender->username) : null,
+            'to' => $mail->to,
+            'cc' => $mail->cc,
+            'bcc' => $mail->bcc,
+            'template' => $mail->template?->name,
+            'status' => $mail->status,
+            'created_at' => $mail->created_at,
+        ];
+    }
+}

app/Http/Controllers/Api/Admin/Customer/Concerns/ManagesCustomerAccount.php

@@ -34,6 +34,26 @@ trait ManagesCustomerAccount
         return response()->json(['error' => false, 'message' => 'Đã gửi mật khẩu mới cho khách hàng.']);
     }
 
+    public function emailPreview(Request $request, string $uuid): JsonResponse
+    {
+        $data = $request->validate(['template_id' => 'required|integer']);
+
+        return response()->json([
+            'error' => false,
+            'data' => $this->mailService->previewTemplateEmail($uuid, (int) $data['template_id']),
+        ]);
+    }
+
+    public function emailLayout(Request $request, string $uuid): JsonResponse
+    {
+        $data = $request->validate(['message' => 'nullable|string']);
+
+        return response()->json([
+            'error' => false,
+            'data' => ['html' => $this->mailService->wrapWithLayout($uuid, (string) ($data['message'] ?? ''))],
+        ]);
+    }
+
     public function sendEmail(Request $request, string $uuid): JsonResponse
     {
         $data = $request->validate([
@@ -43,6 +63,7 @@ trait ManagesCustomerAccount
             'to' => 'nullable|string|max:1000',
             'cc' => 'nullable|string|max:1000',
             'bcc' => 'nullable|string|max:1000',
+            'with_layout' => 'nullable|boolean',
         ]);
 
         $this->mailService->sendCustomEmail($uuid, $data, Auth::guard('admin')->user(), $request->ip());

app/Http/Controllers/Api/Admin/Customer/Concerns/ManagesCustomerServices.php

@@ -35,6 +35,7 @@ trait ManagesCustomerServices
             'requirements' => 'nullable|string',
             'feedback' => 'nullable|string',
             'price' => 'nullable|numeric|min:0',
+            'billing_cycle' => 'nullable|in:monthly,quarterly,semi_annually,annually,biennially,triennially',
             'virtual_machine_id' => 'nullable|integer|exists:virtual_machines,id',
             'os_id' => 'nullable|integer|exists:os,id',
             'vm_cpu' => 'nullable|integer|min:1',

app/Http/Controllers/Api/Admin/Customer/CustomerController.php

@@ -24,6 +24,7 @@ use App\Http\Controllers\Api\Admin\Customer\Concerns\ManagesCustomerDomains;
 use App\Http\Controllers\Api\Admin\Customer\Concerns\ManagesCustomerServices;
 use App\Http\Controllers\Api\Admin\Customer\Concerns\ManagesCustomerBulkActions;
 use App\Http\Controllers\Api\Admin\Customer\Concerns\ManagesCustomerNotes;
+use App\Http\Controllers\Api\Admin\Customer\Concerns\ListsCustomerEmails;
 
 class CustomerController extends Controller
 {
@@ -34,6 +35,7 @@ class CustomerController extends Controller
     use ManagesCustomerServices;
     use ManagesCustomerBulkActions;
     use ManagesCustomerNotes;
+    use ListsCustomerEmails;
 
     public function __construct(
         private readonly CustomerRepositoryInterface $customerRepository,