First cut of a simplified "intro" UI layout (#265)

* First cut of a simplified "intro" UI layout

* Linter

* Add guest role and intro-only access

* Fix guest role UI defaults (#940)

Use enum predicate to avoid missing role helper.

* Remove legacy user role mapping (#941)

Drop the unused user role references in role normalization
and SSO role mapping forms to avoid implying a role that
never existed.

Refs: #0

* Remove role normalization (#942)

Remove role normalization

Roles are now stored directly without legacy mappings.

* Revert role mapping logic

* Remove `normalize_role_settings`

* Remove unnecessary migration

* Make `member` the default

* Broken `.erb`

---------

Signed-off-by: Juan José Mata <juanjo.mata@gmail.com>

test/controllers/invitations_controller_test.rb

@@ -9,6 +9,9 @@ class InvitationsControllerTest < ActionDispatch::IntegrationTest
   test "should get new" do
     get new_invitation_url
     assert_response :success
+    assert_select "option[value=?]", "member"
+    assert_select "option[value=?]", "guest"
+    assert_select "option[value=?]", "admin"
   end
 
   test "should create invitation for member" do
@@ -89,6 +92,49 @@ class InvitationsControllerTest < ActionDispatch::IntegrationTest
     assert_equal @admin, invitation.inviter
   end
 
+  test "admin can create guest invitation" do
+    assert_difference("Invitation.count") do
+      post invitations_url, params: {
+        invitation: {
+          email: "intro-invite@example.com",
+          role: "guest"
+        }
+      }
+    end
+
+    invitation = Invitation.order(created_at: :desc).first
+    assert_equal "guest", invitation.role
+    assert_equal @admin.family, invitation.family
+    assert_equal @admin, invitation.inviter
+  end
+
+  test "inviting an existing user as guest applies intro defaults" do
+    existing_user = users(:empty)
+    existing_user.update!(
+      role: :member,
+      ui_layout: :dashboard,
+      show_sidebar: true,
+      show_ai_sidebar: true,
+      ai_enabled: false
+    )
+
+    assert_difference("Invitation.count") do
+      post invitations_url, params: {
+        invitation: {
+          email: existing_user.email,
+          role: "guest"
+        }
+      }
+    end
+
+    existing_user.reload
+    assert_equal "guest", existing_user.role
+    assert existing_user.ui_layout_intro?
+    assert_not existing_user.show_sidebar?
+    assert_not existing_user.show_ai_sidebar?
+    assert existing_user.ai_enabled?
+  end
+
   test "should handle invalid invitation creation" do
     assert_no_difference("Invitation.count") do
       post invitations_url, params: {