feat(cms): implement multi-language support across frontend and admin UI

apps/spa/src/locales/en/translation.json

@@ -12,6 +12,9 @@
     "findMyScent": "Find My Scent ✨",
     "promotions": "Promotions",
     "profile": "My Profile",
+    "signedInAs": "Signed in as",
+    "logout": "Logout",
+    "login": "LINE Login",
     "search": {
       "title": "Search Collection",
       "placeholder": "Search scents, categories...",
@@ -55,5 +58,47 @@
     "moreRelated": "More {{category}}",
     "reviews": "Reviews",
     "viewDetails": "View Details →"
+  },
+  "checkout": {
+    "title": "Checkout",
+    "shippingInfo": "Shipping Information",
+    "fullName": "Full Name *",
+    "phoneNumber": "Phone Number *",
+    "emailAddress": "Email Address *",
+    "shippingAddress": "Shipping Address *",
+    "selectProfileAddress": "Select address from profile:",
+    "confirmOrder": "Confirm Order",
+    "orderSummary": "Order Summary",
+    "discountCode": "Discount Code",
+    "placeholderDiscount": "e.g. SUMMER2026",
+    "apply": "Apply",
+    "remove": "Remove",
+    "usePoints": "Use Loyalty Points",
+    "pointsAvailable": "{{points}} Points Available",
+    "applyPoints": "Apply points discount",
+    "pointsDiscount": "Points (-฿{{points}})",
+    "subtotal": "Subtotal",
+    "shippingFee": "Shipping Fee",
+    "shippingDiscount": "Shipping Discount",
+    "coupon": "Coupon",
+    "pointsRedeemed": "Points Redeemed",
+    "total": "Total",
+    "invalidCoupon": "Invalid coupon",
+    "errorValidating": "Error validating coupon",
+    "failedOrder": "Failed to place order",
+    "errorOccurred": "An error occurred. Please try again."
+  },
+  "hero": {
+    "defaultTagline": "Vibrant Elegance Collection",
+    "exploreCollection": "Explore Collection",
+    "learnMore": "Learn More"
+  },
+  "newsletter": {
+    "defaultTitle": "Begin Your Wellness Journey",
+    "articleDefaultTitle": "Scent Guide Article",
+    "byAuthor": "By {{author}}",
+    "subscribing": "Submitting...",
+    "thankYou": "Thank You for Subscribing",
+    "successMessage": "You have successfully joined our newsletter list. We will send you exclusive sensory privileges soon."
   }
-}
+}

apps/spa/src/locales/th/translation.json

@@ -12,6 +12,9 @@
     "findMyScent": "ค้นหากลิ่นของคุณ ✨",
     "promotions": "โปรโมชั่น",
     "profile": "โปรไฟล์ของฉัน",
+    "signedInAs": "เข้าสู่ระบบในชื่อ",
+    "logout": "ออกจากระบบ",
+    "login": "เข้าสู่ระบบด้วย LINE",
     "search": {
       "title": "ค้นหาสินค้า",
       "placeholder": "ค้นหากลิ่น, คอลเลกชัน...",
@@ -55,5 +58,47 @@
     "moreRelated": "เพิ่มเติมในหมวด {{category}}",
     "reviews": "รีวิว",
     "viewDetails": "ดูรายละเอียด →"
+  },
+  "checkout": {
+    "title": "ชำระเงิน",
+    "shippingInfo": "ข้อมูลการจัดส่ง",
+    "fullName": "ชื่อ-นามสกุล *",
+    "phoneNumber": "เบอร์โทรศัพท์ *",
+    "emailAddress": "อีเมล *",
+    "shippingAddress": "ที่อยู่จัดส่ง *",
+    "selectProfileAddress": "เลือกดึงที่อยู่จัดส่งจากโปรไฟล์:",
+    "confirmOrder": "ยืนยันการสั่งซื้อ",
+    "orderSummary": "สรุปคำสั่งซื้อ",
+    "discountCode": "รหัสส่วนลด",
+    "placeholderDiscount": "เช่น SUMMER2026",
+    "apply": "ใช้ส่วนลด",
+    "remove": "ลบ",
+    "usePoints": "ใช้คะแนนสะสม",
+    "pointsAvailable": "มี {{points}} คะแนน",
+    "applyPoints": "ใช้ส่วนลดด้วยคะแนน",
+    "pointsDiscount": "คะแนน (-฿{{points}})",
+    "subtotal": "ยอดรวม",
+    "shippingFee": "ค่าจัดส่ง",
+    "shippingDiscount": "ส่วนลดค่าจัดส่ง",
+    "coupon": "คูปอง",
+    "pointsRedeemed": "คะแนนที่ใช้",
+    "total": "ยอดรวมสุทธิ",
+    "invalidCoupon": "คูปองไม่ถูกต้อง",
+    "errorValidating": "เกิดข้อผิดพลาดในการตรวจสอบคูปอง",
+    "failedOrder": "ไม่สามารถทำรายการได้",
+    "errorOccurred": "เกิดข้อผิดพลาด โปรดลองอีกครั้ง"
+  },
+  "hero": {
+    "defaultTagline": "คอลเลกชันหรูหรามีชีวิตชีวา",
+    "exploreCollection": "เลือกชมคอลเลกชัน",
+    "learnMore": "ดูรายละเอียดเพิ่มเติม"
+  },
+  "newsletter": {
+    "defaultTitle": "เริ่มต้นการเดินทางเพื่อสุขภาพของคุณ",
+    "articleDefaultTitle": "บทความแนะนำกลิ่น",
+    "byAuthor": "เขียนโดย {{author}}",
+    "subscribing": "กำลังบันทึก...",
+    "thankYou": "ขอบคุณที่สมัครรับข่าวสาร",
+    "successMessage": "คุณได้เข้าร่วมรับข่าวสารจากเราเรียบร้อยแล้ว เราจะส่งสิทธิพิเศษให้คุณเร็วๆ นี้"
   }
-}
+}