[FIX] 捐贈發票排除列印並補上不可列印提示

1. 訂單詳情發票區塊：新增可列印判斷（love_code 為空才可列印），捐贈發票不顯示列印按鈕，改顯示「捐贈發票無法列印」提示。
2. SalesController::printInvoice() 加入後端守衛，捐贈發票直接回傳明確錯誤訊息，防偽造 POST 呼叫綠界 InvoicePrint 取得查無資料。
3. 三語系新增 key「Donation invoices cannot be printed」，完成 zh_TW/en/ja 對齊排序。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/Http/Controllers/Admin/SalesController.php

@@ -1155,6 +1155,10 @@ class SalesController extends Controller
         if ($invoice->status !== Invoice::STATUS_ISSUED || empty($invoice->invoice_no)) {
             return back()->with('error', __('Only issued invoices can be printed'));
         }
+        // 捐贈發票依法無紙本、不可列印（綠界 InvoicePrint 會回查無資料）
+        if (!empty($invoice->love_code)) {
+            return back()->with('error', __('Donation invoices cannot be printed'));
+        }
         $machine = $invoice->machine;
         if (!$machine || !$ecpay->configForMachine($machine)) {
             return back()->with('error', __('This machine has no ECPay invoice settings'));

lang/en.json

@@ -587,6 +587,7 @@
     "Displayed below Logo on the left (defaults to customer name).": "Displayed below Logo on the left (defaults to customer name).",
     "Displayed below main title on the left.": "Displayed below main title on the left.",
     "Displaying": "Displaying",
+    "Donation invoices cannot be printed": "Donation invoices cannot be printed",
     "Done": "Done",
     "Door Closed": "Door Closed",
     "Door Opened": "Door Opened",

lang/ja.json

@@ -587,6 +587,7 @@
     "Displayed below Logo on the left (defaults to customer name).": "左側のロゴの下に表示されるメインタイトル（未設定の場合はデフォルトで顧客名になります）。",
     "Displayed below main title on the left.": "左側のメインタイトルの下に表示されるサブタイトル。",
     "Displaying": "表示中",
+    "Donation invoices cannot be printed": "寄付の領収書は印刷できません",
     "Done": "完了",
     "Door Closed": "扉が閉まりました",
     "Door Opened": "扉が開きました",

lang/zh_TW.json

@@ -587,6 +587,7 @@
     "Displayed below Logo on the left (defaults to customer name).": "顯示於左側 Logo 下方的主標題（未設定則預設帶入客戶名稱）。",
     "Displayed below main title on the left.": "顯示於左側主標題下方的副標題/英文名稱。",
     "Displaying": "目前顯示",
+    "Donation invoices cannot be printed": "捐贈發票無法列印",
     "Done": "已完成",
     "Door Closed": "機門已關閉",
     "Door Opened": "機門已開啟",

resources/views/admin/sales/partials/order-detail-panel.blade.php

@@ -292,6 +292,8 @@
                     'void' => ['label' => __('Void'), 'color' => 'slate'],
                 ];
                 $invBadge = $invStatusMap[$invStatus] ?? ['label' => $invStatus, 'color' => 'slate'];
+                // 捐贈發票依法無紙本、不可列印（綠界 InvoicePrint 會回查無資料）
+                $invPrintable = empty($order->invoice->love_code);
             @endphp
             <div class="relative flex flex-col sm:flex-row sm:items-center justify-between gap-6">
                 <div class="space-y-3">
@@ -309,12 +311,16 @@
 
                 @if($invStatus === 'issued')
                 <div class="flex items-center gap-3">
+                    @if($invPrintable)
                     <form method="POST" action="{{ route('admin.sales.invoices.print', $order->invoice) }}" target="_blank">
                         @csrf
                         <button type="submit" class="flex-1 sm:flex-none px-6 py-3 rounded-xl bg-white dark:bg-slate-800 text-slate-600 dark:text-slate-300 font-bold text-xs border border-slate-200 dark:border-slate-700 hover:bg-indigo-500 hover:text-white hover:border-indigo-500 transition-all duration-300 shadow-sm">
                             {{ __('Print Invoice') }}
                         </button>
                     </form>
+                    @else
+                    <span class="text-[11px] font-bold text-slate-400 dark:text-slate-500 px-2">{{ __('Donation invoices cannot be printed') }}</span>
+                    @endif
                     <form method="POST" action="{{ route('admin.sales.invoices.void', $order->invoice) }}"
                         onsubmit="return confirm('{{ __('Void this invoice?') }}')">
                         @csrf