add edit button, handle redirect back to LSHAF form, a system test for this

app/controllers/feedbacks_controller.rb

@@ -39,7 +39,7 @@ class FeedbacksController < ApplicationController
 
   def update
     if @feedback.update(feedback_params)
-      redirect_to @feedback.volunteer, make_notice
+      redirect_to params[:redirect_to] || @feedback.volunteer, make_notice
     else
       render :edit
     end
@@ -79,7 +79,8 @@ class FeedbacksController < ApplicationController
       [@volunteer, @feedbackable, @feedback], {
         url: polymorphic_path(
           [@volunteer, @feedbackable, @feedback],
-          redirect_to: default_redirect, group_assignment: params[:group_assignment]
+          redirect_to: params[:redirect_back] || default_redirect,
+          group_assignment: params[:group_assignment]
         )
       }
     ]

app/views/feedbacks/_last_submitted_feedbacks.html.slim

@@ -14,7 +14,8 @@ table.table.table-striped.feedbacks-table
   tbody
     - feedbacks.each do |record|
       tr
-        td= button_link navigation_glyph(:edit), edit_polymorphic_path([@volunteer, record.feedbackable, record])
+        td= glyph_action_button_link :edit, edit_polymorphic_path([@volunteer, record.feedbackable, record],
+              redirect_back: "#{request.path}?#{request.query_string}")
         td= record.goals
         td= record.achievements
         td= record.future

test/system/volunteer_submits_after_remind_test.rb

@@ -150,4 +150,19 @@ class VolunteerSubmitsAfterRemindTest < ApplicationSystemTestCase
     refute_text 'hour_volunteer2'
     refute_text 'feedback_volunteer2'
   end
+
+  test 'volunteer_can_edit_feedback_on_last_submitted_hours_and_feedbacks_path' do
+    login_as @assignment_feedback.volunteer.user
+    visit last_submitted_hours_and_feedbacks_assignment_path(@assignment_feedback.feedbackable)
+
+    click_link 'Bearbeiten', match_polymorph_path(
+      [@assignment_feedback.volunteer, @assignment_feedback.feedbackable, @assignment_feedback]
+    )
+
+    # assert the redirect back to the previous page works
+    fill_in 'Was konnte in den letzten Monaten erreicht werden?', with: 'some_different_goal_text'
+    click_button 'Halbjahres-Rapport aktualisieren'
+    assert page.has_text? 'Halbjahres-Rapport wurde erfolgreich geändert.'
+    assert page.has_text? 'Zuletzt übermittelte Stunden und Halbjahres-Rapporte'
+  end
 end