Turn contest dashboard into tabs for easier navigation

app/controllers/messages_controller.rb

@@ -5,7 +5,7 @@ class MessagesController < ApplicationController
   skip_before_action :require_authentication, only: %i[ create connect cors_preflight_check ]
 
   before_action :cors_set_access_control_headers, only: %i[ create connect cors_preflight_check ]
-  before_action :set_contest, only: %i[ convert destroy ]
+  before_action :set_contest, only: %i[ convert destroy index ]
   before_action :set_data, only: %i[ convert ]
 
   def self.local_prefixes
@@ -68,6 +68,14 @@ class MessagesController < ApplicationController
     end
   end
 
+  def index
+    authorize @contest
+
+    @title = @contest.name
+    @messages = @contest.messages.order(:time_seconds)
+    @puzzles = @contest.puzzles
+  end
+
   def convert
     authorize @contest
 
@@ -76,6 +84,7 @@ class MessagesController < ApplicationController
 
     @completion = Completion.new()
     @completion.display_time_from_start = @message.display_time
+    @completion.completed = true
 
     render "completions/new"
   end