feat: Update week day representation and add localization support for weekdays

frontend/components/StrategySelector.tsx

@@ -78,7 +78,7 @@ const STRATEGIES: StrategyOption[] = [
   }
 ];
 
-const WEEK_DAYS = ['S', 'M', 'T', 'W', 'T', 'F', 'S'];
+const WEEK_DAY_INDEXES = [0, 1, 2, 3, 4, 5, 6];
 
 // Color Theme Variables for Mapping Editors
 const MAPPING_THEME = {
@@ -818,12 +818,12 @@ const StrategySelector: React.FC<StrategySelectorProps> = ({
 
                           {/* Middle Row: Full Width Capsules */}
                           <div className={`grid grid-cols-7 w-full transition-opacity duration-200 mb-3 ${localSchedule.mode !== ScheduleMode.WEEKLY ? 'opacity-50 pointer-events-none' : ''}`}>
-                             {WEEK_DAYS.map((day, index) => {
-                               const isSelected = localSchedule.weeklyDays.includes(index);
+                             {WEEK_DAY_INDEXES.map((dayIndex) => {
+                               const isSelected = localSchedule.weeklyDays.includes(dayIndex);
                                return (
                                  <button
-                                   key={index}
-                                   onClick={() => toggleWeekDay(index)}
+                                   key={dayIndex}
+                                   onClick={() => toggleWeekDay(dayIndex)}
                                    className={`h-9 text-xs font-bold border-y border-l last:border-r border-gray-600/50 transition-colors
                                      first:rounded-l-lg last:rounded-r-lg
                                      ${isSelected 
@@ -832,7 +832,7 @@ const StrategySelector: React.FC<StrategySelectorProps> = ({
                                      }
                                    `}
                                  >
-                                   {day}
+                                   {t(`schedule.weekdaysNarrow.${dayIndex}`)}
                                  </button>
                                )
                              })}