Fix status banner auth check to use current_scope

phx.gen.auth sets current_scope, not current_user. Use !! to
ensure boolean for HEEx template and register_and_log_in_user
in tests for proper auth session.

app/lib/firehose_web/controllers/blog_controller.ex

@@ -29,7 +29,7 @@ defmodule FirehoseWeb.BlogController do
       post: post,
       base_path: blog.base_path(),
       visibility: visibility,
-      authenticated: conn.assigns[:current_user] != nil
+      authenticated: !!(conn.assigns[:current_scope] && conn.assigns.current_scope.user)
     )
   end
 

app/test/firehose_web/controllers/blog_controller_test.exs

@@ -25,23 +25,17 @@ defmodule FirehoseWeb.BlogControllerTest do
   end
 
   describe "GET /blog/:blog_id/:slug - status banners" do
+    setup :register_and_log_in_user
+
     test "authenticated user sees draft banner on draft post", %{conn: conn} do
-      conn =
+      conn = get(conn, ~p"/blog/engineering/hello-world")
-        conn
-        |> init_test_session(%{})
-        |> assign(:current_user, %{id: 1})
-        |> get(~p"/blog/engineering/hello-world")
 
       assert html_response(conn, 200) =~ "Draft"
       assert conn.resp_body =~ "not published"
     end
 
     test "authenticated user sees scheduled banner on future post", %{conn: conn} do
-      conn =
+      conn = get(conn, ~p"/blog/engineering/future-test-post")
-        conn
-        |> init_test_session(%{})
-        |> assign(:current_user, %{id: 1})
-        |> get(~p"/blog/engineering/future-test-post")
 
       response = html_response(conn, 200)
       assert response =~ "scheduled for"
@@ -49,17 +43,15 @@ defmodule FirehoseWeb.BlogControllerTest do
     end
 
     test "authenticated user sees no banner on live post", %{conn: conn} do
-      conn =
+      conn = get(conn, ~p"/blog/engineering/why-firehose")
-        conn
-        |> init_test_session(%{})
-        |> assign(:current_user, %{id: 1})
-        |> get(~p"/blog/engineering/why-firehose")
 
       response = html_response(conn, 200)
       refute response =~ "Draft"
       refute response =~ "scheduled for"
     end
+  end
 
+  describe "GET /blog/:blog_id/:slug - no banners for unauthenticated" do
     test "unauthenticated user sees no banner on draft post", %{conn: conn} do
       response =
         conn