widgets: add 'This Year' mode to Progress Dots (KC-53)

The Progress Dots lock-screen widget already supports Day/Week/Month via its
configuration picker — no code needed for those. Year was the only mode
missing. Added ProgressDotMode.year, a matching provider branch
(Calendar.dateInterval(of: .year)), and yearTitle(for:), mirroring the
existing day/week/month pattern exactly.

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

KisaniCalWidgets/KisaniCalWidgets.swift

@@ -40,6 +40,7 @@ enum ProgressDotMode: String, AppEnum {
     case day
     case week
     case month
+    case year
     case customEvent
 
     static var typeDisplayRepresentation: TypeDisplayRepresentation = "Progress Mode"
@@ -47,6 +48,7 @@ enum ProgressDotMode: String, AppEnum {
         .day: "This Day",
         .week: "This Week",
         .month: "This Month",
+        .year: "This Year",
         .customEvent: "Custom Event",
     ]
 }
@@ -115,6 +117,13 @@ struct ProgressDotProvider: AppIntentTimelineProvider {
             return ProgressDotEntry(date: date, title: Self.monthTitle(for: date),
                                     progress: Self.progress(now: date, start: start, end: end),
                                     totalDots: 100)
+        case .year:
+            let interval = Calendar.current.dateInterval(of: .year, for: date)
+            let start = interval?.start ?? date
+            let end = interval?.end ?? date
+            return ProgressDotEntry(date: date, title: Self.yearTitle(for: date),
+                                    progress: Self.progress(now: date, start: start, end: end),
+                                    totalDots: 100)
         case .customEvent:
             guard let event = configuration.event,
                   let task = loadWidgetTasks().first(where: { $0.id.uuidString == event.id }),
@@ -251,6 +260,12 @@ struct ProgressDotProvider: AppIntentTimelineProvider {
         formatter.dateFormat = "MMMM yyyy"
         return formatter.string(from: date)
     }
+
+    private static func yearTitle(for date: Date) -> String {
+        let formatter = DateFormatter()
+        formatter.dateFormat = "yyyy"
+        return formatter.string(from: date)
+    }
 }
 
 struct DayProgressWidget: Widget {