dossiers: add a button to start a new demarche

app/assets/stylesheets/new_design/dossiers_headers.scss

@@ -0,0 +1,5 @@
+.dossiers-headers {
+  .new-demarche {
+    float: right;
+  }
+}

app/assets/stylesheets/new_design/dossiers_table.scss

@@ -77,3 +77,7 @@
     padding-right: $default-spacer;
   }
 }
+
+.dossiers-table-empty {
+  text-align: center;
+}

app/controllers/new_user/dossiers_controller.rb

@@ -1,5 +1,7 @@
 module NewUser
   class DossiersController < UserController
+    helper_method :new_demarche_url
+
     before_action :ensure_ownership!, except: [:index, :modifier, :update]
     before_action :ensure_ownership_or_invitation!, only: [:modifier, :update]
     before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update]
@@ -112,6 +114,10 @@ module NewUser
       end
     end
 
+    def new_demarche_url
+      "https://doc.demarches-simplifiees.fr/listes-des-demarches"
+    end
+
     private
 
     def ensure_dossier_can_be_updated

app/views/new_user/dossiers/index.html.haml

@@ -1,5 +1,7 @@
 .dossiers-headers.sub-header
   .container
+    = link_to "Commencer une nouvelle démarche", new_demarche_url, class: "button secondary new-demarche"
+
     - if @dossiers_invites.count == 0
       %h1.page-title Mes dossiers
 
@@ -52,4 +54,6 @@
     = paginate(@dossiers)
 
   - else
-    %h2.empty-text Aucun dossier.
+    .dossiers-table-empty
+      %h2.empty-text Aucun dossier.
+      = link_to "Commencer une nouvelle démarche", new_demarche_url, class: "button primary"

spec/views/new_user/dossiers/index.html.haml_spec.rb

@@ -7,6 +7,7 @@ describe 'new_user/dossiers/index.html.haml', type: :view do
   let(:current_tab) { 'mes-dossiers' }
 
   before do
+    allow(view).to receive(:new_demarche_url).and_return('#')
     assign(:user_dossiers, Kaminari.paginate_array(user_dossiers).page(1))
     assign(:dossiers_invites, Kaminari.paginate_array(dossiers_invites).page(1))
     assign(:dossiers, Kaminari.paginate_array(user_dossiers).page(1))