Redesign the landing page, mount public timeline on it (#4122)

* Redesign the landing page, mount public timeline on it

* Adjust the standalone mounted component to the lacking of router

* Adjust auth layout pages to new design

* Fix tests

* Standalone public timeline polling every 5 seconds

* Remove now obsolete translations

* Add responsive design for new landing page

* Address reviews

* Add floating clouds behind frontpage form

* Use access token from public page when available

* Fix mentions and hashtags links, cursor on status content in standalone mode

* Add footer link to source code

* Fix errors on pages that don't embed the component, use classnames

* Fix tests

* Change anonymous autoPlayGif default to false

* When gif autoplay is disabled, hover to play

* Add option to hide the timeline preview

* Slightly improve alt layout

* Add elephant friend to new frontpage

* Display "back to mastodon" in place of "login" when logged in on frontpage

* Change polling time to 3s

2 files changed, 9 insertions, 8 deletions

diff --git a/spec/requests/localization_spec.rb b/spec/requests/localization_spec.rb
index 2f7a5e91e..f625a93a4 100644
--- a/spec/requests/localization_spec.rb
+++ b/spec/requests/localization_spec.rb
@@ -6,13 +6,13 @@ describe 'Localization' do
   after(:all) do
     I18n.locale = I18n.default_locale
   end
-  
+
   it 'uses a specific region when provided' do
     headers = { 'Accept-Language' => 'zh-HK' }
 
     get "/about", headers: headers
     expect(response.body).to include(
-      I18n.t('about.about_mastodon', locale: 'zh-HK')
+      I18n.t('about.about_mastodon_html', locale: 'zh-HK')
     )
   end
 
@@ -21,7 +21,7 @@ describe 'Localization' do
 
     get "/about", headers: headers
     expect(response.body).to include(
-      I18n.t('about.about_mastodon', locale: 'es')
+      I18n.t('about.about_mastodon_html', locale: 'es')
     )
   end
   it 'falls back to english when locale is missing' do
@@ -29,7 +29,7 @@ describe 'Localization' do
 
     get "/about", headers: headers
     expect(response.body).to include(
-      I18n.t('about.about_mastodon', locale: 'en')
+      I18n.t('about.about_mastodon_html', locale: 'en')
     )
   end
 end
diff --git a/spec/views/about/show.html.haml_spec.rb b/spec/views/about/show.html.haml_spec.rb
index 2c5130d84..c0ead6349 100644
--- a/spec/views/about/show.html.haml_spec.rb
+++ b/spec/views/about/show.html.haml_spec.rb
@@ -10,10 +10,11 @@ describe 'about/show.html.haml', without_verify_partial_doubles: true do
 
   it 'has valid open graph tags' do
     instance_presenter = double(:instance_presenter,
-				site_description: 'something',
-				open_registrations: false,
-				closed_registrations_message: 'yes',
-			       )
+                                site_title: 'something',
+                                site_description: 'something',
+                                version_number: '1.0',
+                                open_registrations: false,
+                                closed_registrations_message: 'yes')
     assign(:instance_presenter, instance_presenter)
     render