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.xcodeproj/xcshareddata/xcschemes/KisaniCal.xcscheme

@@ -1,11 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1500"
-   version = "1.7">
+   LastUpgradeVersion = "2620"
+   version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES"
-      runPostActionsOnFailure = "NO">
+      buildImplicitDependencies = "YES">
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"
@@ -27,8 +26,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      onlyGenerateCoverageForSpecifiedTargets = "NO">
+      shouldUseLaunchSchemeArgsEnv = "YES">
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -40,8 +38,6 @@
       </MacroExpansion>
       <Testables>
       </Testables>
-      <CommandLineArguments>
-      </CommandLineArguments>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -63,8 +59,6 @@
             ReferencedContainer = "container:KisaniCal.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <CommandLineArguments>
-      </CommandLineArguments>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
@@ -82,8 +76,6 @@
             ReferencedContainer = "container:KisaniCal.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <CommandLineArguments>
-      </CommandLineArguments>
    </ProfileAction>
    <AnalyzeAction
       buildConfiguration = "Debug">