feat: add default_has_deadline to ChoreSchedule and update related components for deadline management

frontend/vue-app/src/common/models.ts

@@ -23,6 +23,7 @@ export interface ChoreSchedule {
   day_configs: DayConfig[]
   default_hour?: number // master deadline hour; present when mode='days'
   default_minute?: number // master deadline minute; present when mode='days'
+  default_has_deadline?: boolean // false = 'Anytime', no expiry for 'days' mode
   // mode='interval'
   interval_days: number // 1–7
   anchor_date: string // ISO date string e.g. "2026-02-25"; "" means use today

frontend/vue-app/src/common/scheduleUtils.ts

@@ -66,6 +66,8 @@ export function getDueTimeToday(
   localDate: Date,
 ): { hour: number; minute: number } | null {
   if (schedule.mode === 'days') {
+    // default_has_deadline === false means 'Anytime' — no expiry for scheduled days
+    if (schedule.default_has_deadline === false) return null
     const todayWeekday = getLocalWeekday(localDate)
     const dayConfig = schedule.day_configs.find((dc: DayConfig) => dc.day === todayWeekday)
     if (!dayConfig) return null