feat: add new view and controller to display app configs together (#3563)

fixes: #3578

app/controllers/super_admin/app_configs_controller.rb

@@ -0,0 +1,21 @@
+class SuperAdmin::AppConfigsController < SuperAdmin::ApplicationController
+  def show
+    @allowed_configs = %w[FB_APP_ID FB_VERIFY_TOKEN FB_APP_SECRET]
+    # ref: https://github.com/rubocop/rubocop/issues/7767
+    # rubocop:disable Style/HashTransformValues
+    @fb_config = InstallationConfig.where(name: @allowed_configs)
+                                   .pluck(:name, :serialized_value)
+                                   .map { |name, serialized_value| [name, serialized_value['value']] }
+                                   .to_h
+    # rubocop:enable Style/HashTransformValues
+  end
+
+  def create
+    params['app_config'].each do |key, value|
+      i = InstallationConfig.where(name: key).first_or_create(value: value, locked: false)
+      i.value = value
+      i.save!
+    end
+    redirect_to super_admin_app_config_url
+  end
+end

app/views/super_admin/app_configs/show.html.erb

@@ -0,0 +1,25 @@
+<% content_for(:title) do %>
+  App Config
+<% end %>
+<header class="main-content__header" role="banner">
+  <h1 class="main-content__page-title" id="page-title">
+    <%= content_for(:title) %>
+  </h1>
+</header>
+<section class="main-content__body">
+  <%= form_with url: super_admin_app_config_url , method: :post do |form| %>
+    <% @allowed_configs.each do |c| %>
+      <div class="field-unit">
+        <div class="field-unit__label">
+          <%= form.label "app_config[#{c}]", c %>
+        </div>
+        <div class="field-unit__field">
+          <%= form.text_field "app_config[#{c}]", value: @fb_config[c] %>
+        </div>
+      </div>
+    <% end %>
+    <div class="form-actions">
+      <%= form.submit "Submit" %>
+    </div>
+  <% end %>
+</section>

app/views/super_admin/application/_navigation.html.erb

@@ -32,8 +32,14 @@ as defined by the routes in the `admin/` namespace
       <i class="ion ion-ios-keypad"></i>
       <%= link_to "Dashboard", super_admin_root_url %>
     </li>
+
+  <li class="navigation__link">
+      <i class="ion ion-android-settings"></i>
+      <%= link_to "App Config", super_admin_app_config_url %>
+    </li>
+
     <% Administrate::Namespace.new(namespace).resources.each do |resource| %>
-      <% next if ["account_users", "agent_bots", "dashboard", "devise/sessions"].include?  resource.resource %>
+      <% next if ["account_users", "agent_bots", "dashboard", "devise/sessions", "app_configs" ].include?  resource.resource %>
       <li class="navigation__link navigation__link--<%= nav_link_state(resource) %>">
         <i class="<%= sidebar_icons[resource.resource.to_sym] %>"></i>
         <%= link_to(