add tests for email verification flag lifecycle

Tests that sending a test email sets the verified flag, saving config
clears it, and disconnecting clears it. Also adds unit tests for
email_verified?/mark/clear in the Mailer module.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/berrypod_web/live/admin/email_settings_test.exs

@@ -4,7 +4,7 @@ defmodule BerrypodWeb.Admin.EmailSettingsTest do
   import Phoenix.LiveViewTest
   import Berrypod.AccountsFixtures
 
-  alias Berrypod.Settings
+  alias Berrypod.{Mailer, Settings}
 
   setup do
     # Ensure mailer starts as test adapter and restore on exit
@@ -142,6 +142,50 @@ defmodule BerrypodWeb.Admin.EmailSettingsTest do
 
       refute html =~ "Send test email"
     end
+
+    test "sending test email sets verified flag", %{conn: conn} do
+      Settings.put_setting("email_adapter", "postmark")
+      Settings.put_secret("email_postmark_api_key", "pm_test_abc")
+
+      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")
+
+      html = render_click(view, "send_test")
+
+      assert html =~ "Test email sent"
+      assert Mailer.email_verified?()
+    end
+
+    test "saving config clears verified flag", %{conn: conn} do
+      Mailer.mark_email_verified()
+      assert Mailer.email_verified?()
+
+      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")
+
+      view
+      |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "postmark"}})
+      |> render_change()
+
+      view
+      |> form("form[phx-submit=\"save\"]", %{
+        email: %{adapter: "postmark", api_key: "pm_new_key"}
+      })
+      |> render_submit()
+
+      refute Mailer.email_verified?()
+    end
+
+    test "disconnecting clears verified flag", %{conn: conn} do
+      Settings.put_setting("email_adapter", "postmark")
+      Settings.put_secret("email_postmark_api_key", "pm_test_abc")
+      Mailer.mark_email_verified()
+      assert Mailer.email_verified?()
+
+      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")
+
+      render_click(view, "disconnect")
+
+      refute Mailer.email_verified?()
+    end
   end
 
   describe "unauthenticated" do