refactor(design): replace workout emoji icon with segmented section bar

Replace the emoji tile on CalendarWorkoutBlock and WorkoutSessionSheet
header with WorkoutSectionBar — a stack of N horizontal segments, one
per workout section. No emojis, no custom per-program images.

KisaniCal/Views/CalendarView.swift

@@ -963,10 +963,8 @@ struct CalendarWorkoutBlock: View {
         VStack(alignment: .leading, spacing: 0) {
             // ── Header row — taps open session ──
             HStack(spacing: 8) {
-                Text(program.emoji).font(.system(size: 16))
+                WorkoutSectionBar(count: program.sections.count)
                     .frame(width: 30, height: 30)
-                    .background(AppColors.blueSoft)
-                    .clipShape(RoundedRectangle(cornerRadius: 8))
 
                 VStack(alignment: .leading, spacing: 1) {
                     Text(program.name)
@@ -1035,3 +1033,21 @@ struct CalendarWorkoutBlock: View {
         .overlay(RoundedRectangle(cornerRadius: AppRadius.small).stroke(AppColors.blue.opacity(0.2), lineWidth: 1))
     }
 }
+
+// MARK: - Workout Section Bar
+struct WorkoutSectionBar: View {
+    let count: Int
+    var body: some View {
+        let n = max(1, min(6, count))
+        VStack(spacing: 2.5) {
+            ForEach(0..<n, id: \.self) { _ in
+                RoundedRectangle(cornerRadius: 1.5)
+                    .fill(AppColors.blue)
+                    .frame(maxWidth: .infinity, maxHeight: .infinity)
+            }
+        }
+        .padding(7)
+        .background(AppColors.blueSoft)
+        .clipShape(RoundedRectangle(cornerRadius: 8))
+    }
+}

KisaniCal/Views/TodayView.swift

@@ -424,10 +424,8 @@ struct WorkoutSessionSheet: View {
         VStack(spacing: 0) {
             // ── Header ──
             HStack(spacing: 12) {
-                Text(vm.workoutEmoji).font(.system(size: 22))
+                WorkoutSectionBar(count: vm.activeSections.count)
                     .frame(width: 44, height: 44)
-                    .background(AppColors.accentSoft)
-                    .clipShape(RoundedRectangle(cornerRadius: 12))
 
                 VStack(alignment: .leading, spacing: 2) {
                     Text(vm.workoutTitle)