translate field names for visibility dropdown

lib/mv_web/translations/member_fields.ex

@@ -0,0 +1,41 @@
+defmodule MvWeb.Translations.MemberFields do
+  @moduledoc """
+  Helper module to dynamically translate member field names.
+
+  ## Features
+  - Translates technical field names (atoms) to human-friendly localized text
+  - Used primarily in the field visibility dropdown component
+
+  ## Example
+
+      iex> MvWeb.Translations.MemberFields.label(:first_name)
+      "Vorname"  # when locale is "de"
+
+      iex> MvWeb.Translations.MemberFields.label(:first_name)
+      "First Name"  # when locale is "en"
+  """
+  use Gettext, backend: MvWeb.Gettext
+
+  @spec label(atom()) :: String.t()
+  def label(:first_name), do: gettext("First Name")
+  def label(:last_name), do: gettext("Last Name")
+  def label(:email), do: gettext("Email")
+  def label(:paid), do: gettext("Paid")
+  def label(:phone_number), do: gettext("Phone")
+  def label(:join_date), do: gettext("Join Date")
+  def label(:exit_date), do: gettext("Exit Date")
+  def label(:notes), do: gettext("Notes")
+  def label(:city), do: gettext("City")
+  def label(:street), do: gettext("Street")
+  def label(:house_number), do: gettext("House Number")
+  def label(:postal_code), do: gettext("Postal Code")
+
+  # Fallback for unknown fields
+  def label(field) do
+    field
+    |> to_string()
+    |> String.replace("_", " ")
+    |> String.split()
+    |> Enum.map_join(" ", &String.capitalize/1)
+  end
+end