Calendar week view: timeline ⇄ grid layout toggle

Completes the TickTick weekly reference — a toggle flips the week between the
timeline and a grid of day-cards (2 columns), each card listing that day's
schedule as colored bars. Tapping a card opens that day. Both layouts swipe
by week.

- weekGrid state + toggle button (timeline/grid icons)
- weekGridLayout + weekDayCard

(Not build-verified — sim runtime removed to reclaim disk.)

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

KisaniCal/Views/CalendarView.swift

@@ -299,6 +299,8 @@ struct CalendarView: View {
     /// Month view: full grid when true, only the selected day's week when false
     /// (TickTick-style — collapses to give the day agenda more room).
     @State private var monthExpanded: Bool = true
+    /// Week view: timeline when false, grid of day-cards when true.
+    @State private var weekGrid: Bool = false
     @State private var showAddTask = false
     @State private var showCalendarConnect = false
     @State private var showWorkoutSession = false
@@ -841,20 +843,101 @@ struct CalendarView: View {
     // MARK: - Week
 
     // Week: a 7-day timeline (TickTick-style) — hours down the left, one column
-    // per weekday, events as positioned blocks. Reuses the day/3-day time grid.
+    // per weekday, events as positioned blocks. Toggle to a grid of day-cards.
     private var weekView: some View {
         let days = cvWeekDays()
         return VStack(spacing: 0) {
-            cvDayColumnHeader(days)
-                .contentShape(Rectangle())
-                .gesture(DragGesture(minimumDistance: 40).onEnded { v in
-                    if v.translation.width < -40 { navigateWeek(1) }
-                    else if v.translation.width > 40 { navigateWeek(-1) }
-                })
-            Divider().background(AppColors.border(cs))
-            ScrollView(showsIndicators: false) {
-                cvTimeGrid(days: days).padding(.bottom, 40)
+            // Layout toggle: timeline ⇄ grid
+            HStack {
+                Spacer()
+                Button {
+                    withAnimation(KisaniSpring.snappy) { weekGrid.toggle() }
+                } label: {
+                    Image(systemName: weekGrid ? "calendar.day.timeline.left" : "square.grid.2x2")
+                        .font(.system(size: 13, weight: .semibold))
+                        .foregroundColor(AppColors.text2(cs))
+                        .padding(.horizontal, 10).padding(.vertical, 5)
+                        .background(AppColors.surface2(cs))
+                        .clipShape(RoundedRectangle(cornerRadius: 8))
+                }
+                .buttonStyle(.plain)
             }
+            .padding(.horizontal, 14).padding(.top, 6).padding(.bottom, 2)
+
+            if weekGrid {
+                weekGridLayout(days)
+            } else {
+                cvDayColumnHeader(days)
+                    .contentShape(Rectangle())
+                    .gesture(DragGesture(minimumDistance: 40).onEnded { v in
+                        if v.translation.width < -40 { navigateWeek(1) }
+                        else if v.translation.width > 40 { navigateWeek(-1) }
+                    })
+                Divider().background(AppColors.border(cs))
+                ScrollView(showsIndicators: false) {
+                    cvTimeGrid(days: days).padding(.bottom, 40)
+                }
+            }
+        }
+    }
+
+    // Grid layout: the 7 days as cards (2 columns), each listing its schedule.
+    private func weekGridLayout(_ days: [Date]) -> some View {
+        ScrollView(showsIndicators: false) {
+            LazyVGrid(columns: [GridItem(.flexible(), spacing: 10), GridItem(.flexible(), spacing: 10)], spacing: 10) {
+                ForEach(days, id: \.self) { date in
+                    weekDayCard(date)
+                }
+            }
+            .padding(16)
+        }
+        .gesture(DragGesture(minimumDistance: 40).onEnded { v in
+            if v.translation.width < -40 { navigateWeek(1) }
+            else if v.translation.width > 40 { navigateWeek(-1) }
+        })
+    }
+
+    private func weekDayCard(_ date: Date) -> some View {
+        let items = (cvAllDayItems(date) + cvTimeItems(date)).sorted { $0.startMin < $1.startMin }
+        let isTod = cal.isDateInToday(date)
+        let isSel = cal.isDate(date, inSameDayAs: selectedDate)
+        return VStack(alignment: .leading, spacing: 6) {
+            HStack(spacing: 5) {
+                Text(cvDayFmt.string(from: date))
+                    .font(AppFonts.mono(9, weight: .semibold))
+                    .foregroundColor(isTod ? AppColors.accent : AppColors.text3(cs))
+                Text("\(cal.component(.day, from: date))")
+                    .font(AppFonts.sans(14, weight: isTod ? .bold : .semibold))
+                    .foregroundColor(isTod ? AppColors.accent : AppColors.text(cs))
+                Spacer(minLength: 0)
+            }
+            if items.isEmpty {
+                Text("Free").font(AppFonts.sans(9)).foregroundColor(AppColors.text3(cs))
+            } else {
+                ForEach(Array(items.prefix(5).enumerated()), id: \.offset) { _, item in
+                    HStack(spacing: 4) {
+                        RoundedRectangle(cornerRadius: 2).fill(item.color).frame(width: 3, height: 12)
+                        Text(item.title).font(AppFonts.sans(9))
+                            .foregroundColor(AppColors.text2(cs)).lineLimit(1)
+                        Spacer(minLength: 0)
+                    }
+                }
+                if items.count > 5 {
+                    Text("+\(items.count - 5) more").font(AppFonts.sans(8)).foregroundColor(AppColors.text3(cs))
+                }
+            }
+        }
+        .padding(10)
+        .frame(maxWidth: .infinity, minHeight: 92, alignment: .topLeading)
+        .background(AppColors.surface(cs))
+        .clipShape(RoundedRectangle(cornerRadius: AppRadius.large))
+        .overlay(
+            RoundedRectangle(cornerRadius: AppRadius.large)
+                .stroke(isSel ? AppColors.accent : AppColors.border(cs), lineWidth: isSel ? 1.5 : 1)
+        )
+        .contentShape(Rectangle())
+        .onTapGesture {
+            withAnimation(KisaniSpring.micro) { selectedDate = date; viewMode = .day }
         }
     }