feat: add free charge price mode for product buy page (#3015)

* feat: add free charge price mode for product buy page

* fix: improve code format

web/src/locales/de/data.json

@@ -619,6 +619,7 @@
     "Processing...": "In Bearbeitung...",
     "Product": "Produkt",
     "Product - Tooltip": "Produktname",
+    "Recharged successfully": "Recharged successfully",
     "Result": "Ergebnis",
     "Return to Website": "Zurück zur Website",
     "The payment has been canceled": "The payment has been canceled",
@@ -627,6 +628,8 @@
     "The payment is still under processing": "Die Zahlung wird immer noch bearbeitet",
     "Type - Tooltip": "Zahlungsmethode, die beim Kauf des Produkts verwendet wurde",
     "You have successfully completed the payment": "Sie haben die Zahlung erfolgreich abgeschlossen",
+    "You have successfully recharged": "You have successfully recharged",
+    "Your current balance is": "Your current balance is",
     "please wait for a few seconds...": "Bitte warten Sie ein paar Sekunden...",
     "the current state is": "der aktuelle Zustand ist"
   },
@@ -689,6 +692,8 @@
     "Edit Product": "Produkt bearbeiten",
     "Image": "Bild",
     "Image - Tooltip": "Bild des Produkts",
+    "Is recharge": "Is recharge",
+    "Is recharge - Tooltip": "Whether the current product is to recharge balance",
     "New Product": "Neues Produkt",
     "Pay": "Zahlen",
     "PayPal": "PayPal",
@@ -1080,6 +1085,8 @@
     "Address line": "Address line",
     "Affiliation": "Zugehörigkeit",
     "Affiliation - Tooltip": "Arbeitgeber, wie Firmenname oder Organisationsname",
+    "Balance": "Balance",
+    "Balance - Tooltip": "User's balance",
     "Bio": "Bio",
     "Bio - Tooltip": "Selbstvorstellung des Nutzers",
     "Birthday": "Birthday",