feat: Updated public portal header design (#8089)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/helpers/portal_helper.rb

@@ -8,4 +8,29 @@ module PortalHelper
     bg_image = theme == 'dark' ? 'grid_dark.svg' : 'grid.svg'
     "background: url(/assets/images/hc/#{bg_image}) #{generate_portal_bg_color(portal_color, theme)}"
   end
+
+  def language_name(locale)
+    language_map = YAML.load_file(Rails.root.join('config/languages/language_map.yml'))
+    language_map[locale] || locale
+  end
+
+  def get_theme_names(theme)
+    if theme == 'light'
+      I18n.t('public_portal.header.appearance.light')
+    elsif theme == 'dark'
+      I18n.t('public_portal.header.appearance.dark')
+    else
+      I18n.t('public_portal.header.appearance.system')
+    end
+  end
+
+  def get_theme_icon(theme)
+    if theme == 'light'
+      'icons/sun'
+    elsif theme == 'dark'
+      'icons/moon'
+    else
+      'icons/monitor'
+    end
+  end
 end