영어 번역 일관성 개선: Buyer Name → Purchaser Name

buyerName 필드의 영어 번역을 일관성 있게 "Purchaser Name"으로 통일했습니다.

변경 영역:
- 거래 관련 폼 (송장, ARS, KEY-IN, 링크결제 등)
- 결제 정보 표시 영역

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/locales/en.json

@@ -682,7 +682,7 @@
             "incomeDeduction": "Income Tax Deduction",
             "expenseProof": "Proof of Expenditure",
             "productNamePlaceholder": "Product Name",
-            "buyerNamePlaceholder": "Buyer Name",
+            "buyerNamePlaceholder": "Purchaser Name",
             "issueNumberPlaceholder": "Business Number OR Phone Number",
             "emailPlaceholder": "TEST123@nicepay.com",
             "phoneNumberPlaceholder": "01012345678",
@@ -884,7 +884,7 @@
             "amount": "Amount",
             "installmentPeriod": "Installment Period",
             "lumpSum": "Lump Sum",
-            "buyerName": "Buyer Name",
+            "buyerName": "Purchaser Name",
             "phoneNumber": "Phone Number",
             "email": "Email",
             "paymentMethod": "Payment Method",
@@ -896,7 +896,7 @@
             "merchant": "Merchant",
             "productName": "Product Name",
             "productPrice": "Product Price",
-            "buyerName": "Buyer Name",
+            "buyerName": "Purchaser Name",
             "buyerEmail": "Buyer Email",
             "buyerPhoneNumber": "Buyer Phone Number",
             "phoneNumberPlaceholder": "Enter without -",
@@ -954,7 +954,7 @@
             "paymentValidDate": "Payment Valid Date",
             "until": "Until",
             "selectDate": "Select Date",
-            "buyerName": "Buyer Name",
+            "buyerName": "Purchaser Name",
             "buyerEmail": "Buyer Email",
             "buyerPhoneNumber": "Buyer Phone Number",
             "buyerInfoVerification": "Buyer Info Verification",
@@ -1182,7 +1182,7 @@
         },
         "infoWrap": {
             "paymentInfo": "Payment Information",
-            "buyerName": "Buyer Name",
+            "buyerName": "Purchaser Name",
             "sendMethod": "Send Method",
             "sendDate": "Send Date",
             "paymentStatusFailCount": "Payment Status (Fail Count)",