[FIX] 電子發票列印限縮為僅統編發票，避免載具/捐贈列印失敗

1. 釐清綠界規則：InvoicePrint 僅能列印開立時 Print=1 的發票；本系統開立邏輯為「有統編才 Print=1」，故載具、捐贈、一般無統編 B2C 皆 Print=0，列印會回「取得發票列印網址失敗」。
2. 後端 printInvoice() 守衛改為檢查 metadata['business_tax_id']，非統編發票直接回「Only invoices with a tax ID can be printed」，取代原本僅擋捐贈(love_code)的舊邏輯。
3. 訂單詳情面板列印鈕顯示條件改為 business_tax_id 有值才顯示，非統編發票改顯示「此發票無可列印紙本」。
4. 新增三語系 key（Only invoices with a tax ID can be printed、This invoice has no printable copy），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

@@ -1155,9 +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）
+        // 僅「統編發票」可列印：本系統開立時 Print=1 僅給帶統編者（見 EcpayInvoiceService::issue 的 Print 規則）；
-        if (!empty($invoice->love_code)) {
+        // 捐贈、載具、一般無統編 B2C 皆以 Print=0 開立，綠界 InvoicePrint 會回查無資料而失敗。
-            return back()->with('error', __('Donation invoices cannot be printed'));
+        if (empty($invoice->metadata['business_tax_id'] ?? '')) {
+            return back()->with('error', __('Only invoices with a tax ID can be printed'));
         }
         $machine = $invoice->machine;
         if (!$machine || !$ecpay->configForMachine($machine)) {

lang/en.json

@@ -1392,6 +1392,7 @@
     "Online Status": "Online Status",
     "Only .xlsx files are supported (Max 5MB)": "Only .xlsx files are supported (Max 5MB)",
     "Only .xlsx, .xls, .csv files are supported (Max 5MB)": "Only .xlsx, .xls, .csv files are supported (Max 5MB)",
+    "Only invoices with a tax ID can be printed": "Only invoices with a tax ID can be printed",
     "Only issued invoices can be printed": "Only issued invoices can be printed",
     "Only issued invoices can be voided": "Only issued invoices can be voided",
     "Only machines under the same company can be cloned for security.": "Only machines under the same company can be cloned for security.",
@@ -2113,6 +2114,7 @@
     "This Month": "This Month",
     "This Week": "This Week",
     "This account does not belong to this company.": "This account does not belong to this company.",
+    "This invoice has no printable copy": "This invoice has no printable copy",
     "This is a system administrator role. Its name is locked to ensure system stability.": "This is a system administrator role. Its name is locked to ensure system stability.",
     "This machine has a pending command. Please wait.": "This machine has a pending command. Please wait.",
     "This machine has no ECPay invoice settings": "This machine has no ECPay invoice settings",

lang/ja.json

@@ -1392,6 +1392,7 @@
     "Online Status": "オンラインステータス",
     "Only .xlsx files are supported (Max 5MB)": "Only .xlsx files are supported (Max 5MB)",
     "Only .xlsx, .xls, .csv files are supported (Max 5MB)": ".xlsx, .xls, .csv ファイルのみサポートされています (最大 5MB)",
+    "Only invoices with a tax ID can be printed": "統一番号付き請求書のみ印刷できます",
     "Only issued invoices can be printed": "発行済みの領収書のみ印刷できます",
     "Only issued invoices can be voided": "Only issued invoices can be voided",
     "Only machines under the same company can be cloned for security.": "セキュリティのため、同じ会社の機器設定のみコピーできます。",
@@ -2113,6 +2114,7 @@
     "This Month": "今月",
     "This Week": "今週",
     "This account does not belong to this company.": "このアカウントは該当企業に所属していません。",
+    "This invoice has no printable copy": "この請求書は印刷可能な紙面がありません",
     "This is a system administrator role. Its name is locked to ensure system stability.": "これはシステム管理者ロールです。システムの安定性を確保するため、名前はロックされています。",
     "This machine has a pending command. Please wait.": "この機器には実行中のコマンドがあります。しばらくお待ちください。",
     "This machine has no ECPay invoice settings": "This machine has no ECPay invoice settings",

lang/zh_TW.json

@@ -1392,6 +1392,7 @@
     "Online Status": "在線狀態",
     "Only .xlsx files are supported (Max 5MB)": "僅支援 .xlsx 檔案 (最大 5MB)",
     "Only .xlsx, .xls, .csv files are supported (Max 5MB)": "僅支援 .xlsx, .xls, .csv 檔案 (最大 5MB)",
+    "Only invoices with a tax ID can be printed": "僅統編發票可列印",
     "Only issued invoices can be printed": "僅已開立的發票可列印",
     "Only issued invoices can be voided": "僅已開立的發票可作廢",
     "Only machines under the same company can be cloned for security.": "基於安全性，僅限複製同公司旗下的機台設定。",
@@ -2113,6 +2114,7 @@
     "This Month": "本月",
     "This Week": "本週",
     "This account does not belong to this company.": "此帳號不屬於該公司。",
+    "This invoice has no printable copy": "此發票無可列印紙本",
     "This is a system administrator role. Its name is locked to ensure system stability.": "這是系統管理員角色，名稱已鎖定以確保系統穩定性。",
     "This machine has a pending command. Please wait.": "此機台已有指令正在執行，請稍後。",
     "This machine has no ECPay invoice settings": "此機台未設定綠界電子發票",

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

@@ -342,8 +342,9 @@
                     '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）
+                // 僅「統編發票」可列印：本系統開立時 Print=1 僅給帶統編者；
-                $invPrintable = empty($order->invoice->love_code);
+                // 捐贈、載具、一般無統編 B2C 皆為 Print=0，綠界 InvoicePrint 會回查無資料而失敗。
+                $invPrintable = !empty($order->invoice->metadata['business_tax_id'] ?? '');
             @endphp
             <div class="relative flex flex-col sm:flex-row sm:items-center justify-between gap-6">
                 <div class="space-y-3">
@@ -361,7 +362,7 @@
 
                 @if($invStatus === 'issued')
                 <div class="flex items-center gap-3">
-                    {{-- 列印（捐贈發票無紙本，僅非捐贈可列印） --}}
+                    {{-- 列印：僅統編發票可列印（載具／捐贈／一般無統編 B2C 為 Print=0，綠界查無資料） --}}
                     @if($invPrintable)
                     <form method="POST" action="{{ route('admin.sales.invoices.print', $order->invoice) }}" target="_blank">
                         @csrf
@@ -370,7 +371,7 @@
                         </button>
                     </form>
                     @else
-                    <span class="text-[11px] font-bold text-slate-400 dark:text-slate-500 px-2">{{ __('Donation invoices cannot be printed') }}</span>
+                    <span class="text-[11px] font-bold text-slate-400 dark:text-slate-500 px-2">{{ __('This invoice has no printable copy') }}</span>
                     @endif
                     {{-- 作廢：僅平台系統管理員可見可用（後端亦有 403 守衛）。使用自製確認框 UI --}}
                     @if(auth()->user()->isSystemAdmin())