Fix: per-date workout completion in calendar (KC-10)

The calendar marked every occurrence of a program complete once any one
was finished — including future dates — because DayTimelineView read the
program's live shared doneSets.

- Add WorkoutViewModel.isWorkoutComplete(on:) backed by workoutDates.
- DayTimelineView takes workoutDone and uses it instead of live sets;
  Calendar passes the selected date's state, Today passes today's.
- A date now shows complete only if that specific date was finished.

Log KC-10 in ISSUES.md.

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

KisaniCal/Views/CalendarView.swift

@@ -587,6 +587,7 @@ struct CalendarView: View {
                     },
                     calEvents: calStore.isAuthorized ? calStore.events(for: selectedDate) : [],
                     workout: workoutVM.program(for: selectedDate),
+                    workoutDone: workoutVM.isWorkoutComplete(on: selectedDate),
                     onWorkoutTap: {
                         if let w = workoutVM.program(for: selectedDate),
                            workoutVM.activeProgramId != w.id { workoutVM.switchProgram(to: w.id) }
@@ -1538,6 +1539,7 @@ struct DayTimelineView: View {
     var overdueTasks:  [TaskItem] = []
     let calEvents:     [EKEvent]
     let workout:       WorkoutProgram?
+    var workoutDone:   Bool = false   // per-DATE completion (from workoutDates), not live sets
     var onWorkoutTap:  (() -> Void)? = nil
     var onToggle:      ((TaskItem) -> Void)? = nil
     var onPin:         ((TaskItem) -> Void)? = nil
@@ -1583,9 +1585,10 @@ struct DayTimelineView: View {
             ))
         }
 
-        // Workout — always pinned first (sortGroup -1)
+        // Workout — always pinned first (sortGroup -1). Completion is tied to THIS
+        // date (workoutDates), never the program's shared live set state.
         if let w = workout {
-            let done = w.doneSets == w.totalSets && w.totalSets > 0
+            let done = workoutDone
             out.append(DayTLEntry(
                 timeLabel: "Workout",
                 title: w.name,

KisaniCal/Views/TodayView.swift

@@ -90,6 +90,7 @@ struct TodayView: View {
                         overdueTasks: [],
                         calEvents: todayCalEvents,
                         workout: workoutVM.program(for: Date()),
+                        workoutDone: workoutVM.isWorkoutComplete(on: Date()),
                         onWorkoutTap: {
                             if let w = workoutVM.program(for: Date()), workoutVM.activeProgramId != w.id {
                                 workoutVM.switchProgram(to: w.id)