add assignments to volunteer show

app/views/assignments/_assignment.html.slim

 tr
   td = link_to assignment.client, assignment.client
-  td = link_to assignment.volunteer, assignment.volunteer
+  - if action_name == 'index'
+    td = link_to assignment.volunteer, assignment.volunteer
   td = t("state.#{assignment.state}", scope: [:simple_form, :options, :assignment]) if assignment.state.present?
   td = link_to assignment.creator, assignment.creator if assignment.creator.present?
   = render 'index_actions', subject: assignment

app/views/assignments/_assignments_block.html.slim

+.row
+  .col-xs-12
+  table.table.table-striped
+    thead
+      tr
+        th= t_model(Client)
+        - if action_name == 'index'
+          th= t_model(Volunteer)
+        th= t_attr(:state)
+        th= t_attr(:created_by)
+        th colspan='5'
+
+    tbody
+        = render assignments

app/views/assignments/index.html.slim

@@ -2,18 +2,6 @@
   .col-xs-12
     h1= t('assignments')
 
-.row
-  .col-xs-12
-  table.table.table-striped
-    thead
-      tr
-        th= t_model(Client)
-        th= t_model(Volunteer)
-        th= t_attr(:state)
-        th= t_attr(:created_by)
-        th colspan='5'
-
-    tbody
-        = render @assignments
+= render 'assignments_block', assignments: @assignments
 
 = form_navigation_btn :new

app/views/volunteers/show.html.slim

@@ -109,5 +109,11 @@ h3= t_attr(:group_accompaniment)
 
 = render 'schedules/show', participant: @volunteer
 
+- if @volunteer.assignments.any?
+  .row
+    .col-xs-12
+      h3= t('assignments')
+  = render 'assignments/assignments_block', assignments: @volunteer.assignments
+
 = form_navigation_btn :edit
 = form_navigation_btn :back