Widgets/notifications: tracked-event auto-advance, lock-screen dots, Snooze labels, period milestones

- Bars widget: tracked ("Track Countdown") events now also advance — a completed
  or past (non-recurring) tracked event falls through to the next-nearest, and the
  refresh boundary covers the tracked event's expiry. Recurring tracked events
  still roll forward. Completes the KC-26 auto-advance for all paths.
- Progress Dots on the lock screen (accessoryRectangular): show 28 larger dots
  instead of 100 tiny ones, render with .primary for the vibrant tint, and use
  AccessoryWidgetBackground so it's legible (Home Screen keeps the 100-dot grid).
- Notifications: snooze action labels now read "Snooze 15 min/30 min/1 hour/
  2 hours" (lock screen) and "Snooze 15 Minutes…" (in-app Postpone menu).
- New period milestone notifications: recurring "One more week/month/year passed"
  at end of week (Sun 20:00), month (1st 09:00), and year (Jan 1 09:00); gated by
  a kisani.periodMilestones flag, scheduled via the existing reschedule path.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

KisaniCal/Views/TaskContextMenu.swift

@@ -71,16 +71,16 @@ struct TaskMenuItems: View {
 
         Menu {
             Button { onPostponeMinutes(task, 15) } label: {
-                Label("15 Minutes", systemImage: "clock")
+                Label("Snooze 15 Minutes", systemImage: "clock")
             }
             Button { onPostponeMinutes(task, 30) } label: {
-                Label("30 Minutes", systemImage: "clock")
+                Label("Snooze 30 Minutes", systemImage: "clock")
             }
             Button { onPostponeMinutes(task, 60) } label: {
-                Label("1 Hour", systemImage: "clock")
+                Label("Snooze 1 Hour", systemImage: "clock")
             }
             Button { onPostponeMinutes(task, 120) } label: {
-                Label("2 Hours", systemImage: "clock")
+                Label("Snooze 2 Hours", systemImage: "clock")
             }
             Divider()
             Button { onSetDate(task, preservingTime(on: dayOffset(1))) } label: {