feat: prevent join requests with equal mail

priv/gettext/de/LC_MESSAGES/default.po

@@ -3800,3 +3800,34 @@ msgstr "Status und Prüfung"
 #, elixir-autogen, elixir-format
 msgid "We could not send the confirmation email. Please try again later or contact support."
 msgstr "Die Bestätigungs-E-Mail konnte nicht versendet werden. Bitte versuche es später erneut oder wende dich an den Support."
+
+#: lib/mv_web/templates/emails/join_already_member.html.heex
+#: lib/mv_web/templates/emails/join_already_pending.html.heex
+#, elixir-autogen, elixir-format
+msgid "If you have any questions, please contact us."
+msgstr "Bei Fragen kannst du dich gerne an uns wenden."
+
+#: lib/mv_web/emails/join_already_member_email.ex
+#, elixir-autogen, elixir-format
+msgid "Membership application – already a member"
+msgstr "Mitgliedsantrag – bereits Mitglied"
+
+#: lib/mv_web/emails/join_already_pending_email.ex
+#, elixir-autogen, elixir-format
+msgid "Membership application – already under review"
+msgstr "Mitgliedsantrag – wird bereits geprüft"
+
+#: lib/mv_web/templates/emails/join_already_member.html.heex
+#, elixir-autogen, elixir-format
+msgid "We have received your request. The email address you entered is already registered as a member."
+msgstr "Wir haben deine Anfrage erhalten. Die angegebene E-Mail-Adresse ist bereits als Mitglied registriert."
+
+#: lib/mv_web/templates/emails/join_already_pending.html.heex
+#, elixir-autogen, elixir-format
+msgid "We have received your request. You already have a membership application that is being reviewed."
+msgstr "Wir haben deine Anfrage erhalten. Du hast bereits einen Mitgliedsantrag, der geprüft wird."
+
+#: lib/mv_web/templates/emails/join_confirmation.html.heex
+#, elixir-autogen, elixir-format
+msgid "You already had a pending request. Here is a new confirmation link."
+msgstr "Du hattest bereits einen offenen Antrag. Hier ist ein neuer Bestätigungslink."

priv/gettext/default.pot

@@ -3800,3 +3800,34 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "We could not send the confirmation email. Please try again later or contact support."
 msgstr ""
+
+#: lib/mv_web/templates/emails/join_already_member.html.heex
+#: lib/mv_web/templates/emails/join_already_pending.html.heex
+#, elixir-autogen, elixir-format
+msgid "If you have any questions, please contact us."
+msgstr ""
+
+#: lib/mv_web/emails/join_already_member_email.ex
+#, elixir-autogen, elixir-format
+msgid "Membership application – already a member"
+msgstr ""
+
+#: lib/mv_web/emails/join_already_pending_email.ex
+#, elixir-autogen, elixir-format
+msgid "Membership application – already under review"
+msgstr ""
+
+#: lib/mv_web/templates/emails/join_already_member.html.heex
+#, elixir-autogen, elixir-format
+msgid "We have received your request. The email address you entered is already registered as a member."
+msgstr ""
+
+#: lib/mv_web/templates/emails/join_already_pending.html.heex
+#, elixir-autogen, elixir-format
+msgid "We have received your request. You already have a membership application that is being reviewed."
+msgstr ""
+
+#: lib/mv_web/templates/emails/join_confirmation.html.heex
+#, elixir-autogen, elixir-format
+msgid "You already had a pending request. Here is a new confirmation link."
+msgstr ""

priv/gettext/en/LC_MESSAGES/default.po

@@ -3800,3 +3800,34 @@ msgstr "Status and review"
 #, elixir-autogen, elixir-format
 msgid "We could not send the confirmation email. Please try again later or contact support."
 msgstr ""
+
+#: lib/mv_web/templates/emails/join_already_member.html.heex
+#: lib/mv_web/templates/emails/join_already_pending.html.heex
+#, elixir-autogen, elixir-format
+msgid "If you have any questions, please contact us."
+msgstr "If you have any questions, please contact us."
+
+#: lib/mv_web/emails/join_already_member_email.ex
+#, elixir-autogen, elixir-format
+msgid "Membership application – already a member"
+msgstr "Membership application – already a member"
+
+#: lib/mv_web/emails/join_already_pending_email.ex
+#, elixir-autogen, elixir-format
+msgid "Membership application – already under review"
+msgstr "Membership application – already under review"
+
+#: lib/mv_web/templates/emails/join_already_member.html.heex
+#, elixir-autogen, elixir-format
+msgid "We have received your request. The email address you entered is already registered as a member."
+msgstr "We have received your request. The email address you entered is already registered as a member."
+
+#: lib/mv_web/templates/emails/join_already_pending.html.heex
+#, elixir-autogen, elixir-format
+msgid "We have received your request. You already have a membership application that is being reviewed."
+msgstr "We have received your request. You already have a membership application that is being reviewed."
+
+#: lib/mv_web/templates/emails/join_confirmation.html.heex
+#, elixir-autogen, elixir-format
+msgid "You already had a pending request. Here is a new confirmation link."
+msgstr "You already had a pending request. Here is a new confirmation link."

priv/repo/migrations/20260313120000_add_reviewed_by_display_to_join_requests.exs

@@ -0,0 +1,30 @@
+defmodule Mv.Repo.Migrations.AddReviewedByDisplayToJoinRequests do
+  @moduledoc """
+  Adds reviewed_by_display to join_requests for showing reviewer in UI without loading User.
+
+  Backfills existing rows from users.email where reviewed_by_user_id is set.
+  """
+
+  use Ecto.Migration
+
+  def up do
+    alter table(:join_requests) do
+      add :reviewed_by_display, :text
+    end
+
+    # Backfill from users.email for rows that have reviewed_by_user_id
+    execute """
+    UPDATE join_requests j
+    SET reviewed_by_display = u.email
+    FROM users u
+    WHERE j.reviewed_by_user_id = u.id
+      AND j.reviewed_by_user_id IS NOT NULL
+    """
+  end
+
+  def down do
+    alter table(:join_requests) do
+      remove :reviewed_by_display
+    end
+  end
+end