feat: Settings screen for custom branding (#8543)

- Ability to configure Chatwoot custom branding from UI when using paid plans

Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

app/controllers/super_admin/app_configs_controller.rb

@@ -1,21 +1,38 @@
 class SuperAdmin::AppConfigsController < SuperAdmin::ApplicationController
+  before_action :set_config
+  before_action :allowed_configs
   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
+    @app_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|
+      next unless @allowed_configs.include?(key)
+
       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
+    # rubocop:disable Rails/I18nLocaleTexts
+    redirect_to super_admin_settings_path, notice: 'App Configs updated successfully'
+    # rubocop:enable Rails/I18nLocaleTexts
+  end
+
+  private
+
+  def set_config
+    @config = params[:config]
+  end
+
+  def allowed_configs
+    @allowed_configs = %w[FB_APP_ID FB_VERIFY_TOKEN FB_APP_SECRET]
   end
 end
+
+SuperAdmin::AppConfigsController.prepend_mod_with('SuperAdmin::AppConfigsController')