feat: add support to select default radio button based on key

also simplifies the radio button code, making it easier to parse

components/Settings/AppSettings/Language.vue

@@ -5,9 +5,8 @@
     <p class="subtitle">TIME FORMAT</p>
     <div class="icons">
       <RadioButtons
-        :button-count="3"
         :text-strings="timeFormatTextStrings"
-        :default-button-index="timeFormatSelectedIndex"
+        :default-button-key='settingsLoad().timeFormat ?? "Auto"'
         :callback="(index: number) => {settingSave('timeFormat', timeFormatTextStrings[index])}"
       />
     </div>
@@ -20,7 +19,6 @@ import RadioButtons from '~/components/UserInterface/RadioButtons.vue';
 import type { TimeFormat } from '~/types/settings';
 
 const timeFormatTextStrings: TimeFormat[] = ["Auto", "4:18 PM", "16:18"]
-const timeFormatSelectedIndex = timeFormatTextStrings.indexOf(settingsLoad().timeFormat ?? "Auto")
 
 </script>