gift: update UI and voucher & items BS

src/assets/locals/en.json

@@ -465,5 +465,11 @@
     "shareLink": "Share Link",
     "shareLinkDescription": "Your friends can scan the QR code or use the link to view the bill and pay their share securely from their phone.",
     "shareThisToSplitTheBill": "Share this to split the bill"
+  },
+  "gift": {
+    "items": "Gift Items",
+    "balance": "Gift Balance",
+    "itemsAndBalance": "Items and Balance",
+    "selectGiftType": "Select Gift Type"
   }
 }