feat: Add Saturday localization support in settings and update calendar type handling

public/locales/ar/settings.json

@@ -57,6 +57,7 @@
     "firstDayOfWeekDescription": "اختر اليوم الذي يبدأ به أسبوعك",
     "sunday": "الأحد",
     "monday": "الاثنين",
+    "saturday": "السبت",
     "formats": {
       "mdy": "MM/DD/YYYY (الولايات المتحدة)",
       "dmy": "DD/MM/YYYY (أوروبا)",

public/locales/en/settings.json

@@ -57,6 +57,7 @@
     "firstDayOfWeekDescription": "Select which day starts your week",
     "sunday": "Sunday",
     "monday": "Monday",
+    "saturday": "Saturday",
     "formats": {
       "mdy": "MM/DD/YYYY (US)",
       "dmy": "DD/MM/YYYY (Europe)",

public/locales/es/settings.json

@@ -57,6 +57,7 @@
     "firstDayOfWeekDescription": "Selecciona qué día comienza tu semana",
     "sunday": "Domingo",
     "monday": "Lunes",
+    "saturday": "Sábado",
     "formats": {
       "mdy": "MM/DD/AAAA (EE.UU.)",
       "dmy": "DD/MM/AAAA (Europa)",