feat: Update button and link text for consistency

- "Create your MBTA account"
- "Logout" --> "Sign out"

apps/concierge_site/lib/helpers/session_helper.ex

@@ -34,7 +34,7 @@ defmodule ConciergeSite.SessionHelper do
       end
 
     conn
-    |> put_flash(:info, "You have been logged out!")
+    |> put_flash(:info, "You have been signed out.")
     |> Guardian.Plug.sign_out(ConciergeSite.Guardian)
     |> Conn.clear_session()
     |> redirect(redirect_to)

apps/concierge_site/lib/templates/layout/_header_navigation_links.html.eex

@@ -3,4 +3,4 @@
 <% end %>
 <div><%= link("Subscriptions", to: trip_path(@conn, :index)) %></div>
 <div><%= link("Settings", to: account_path(@conn, :edit)) %></div>
-<div><%= link("Logout", to: session_path(@conn, :delete), method: :delete) %></div>
+<div><%= link("Sign out", to: session_path(@conn, :delete), method: :delete) %></div>

apps/concierge_site/lib/templates/page/landing.html.eex

@@ -11,7 +11,11 @@
 
     <div class="landing-page__buttons row">
       <div class="col-12 offset-0 col-lg-8 offset-lg-2">
-        <%= link "Create an account", to: account_path(@conn, :new), class: "btn btn-primary btn-block" %>
+        <%= if keycloak_auth?() do %>
+          <%= link "Create your MBTA account", to: account_path(@conn, :new), class: "btn btn-primary btn-block" %>
+        <% else %>
+          <%= link "Create an account", to: account_path(@conn, :new), class: "btn btn-primary btn-block" %>
+        <% end %>
         <%= link "Sign in", to: session_path(@conn, :new), class: "btn btn-outline-primary btn-block" %>
 
         <p class="landing-page__faq">

apps/concierge_site/lib/views/page_view.ex

@@ -1,3 +1,7 @@
 defmodule ConciergeSite.PageView do
   use ConciergeSite.Web, :view
+
+  alias ConciergeSite.SessionHelper
+
+  defdelegate keycloak_auth?, to: SessionHelper
 end