Calendar: fix week/3-day dead space (pin content to top)

The timeline views' content is a thin header + a greedy ScrollView (≈0 ideal
height), so the top-level VStack shrank and the bottomTrailing ZStack floated
it to the bottom — leaving a big empty gap above the day header. Month view
has a tall fixed grid so it never surfaced. Pin the VStack to fill height and
top-align.

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

KisaniCal/Views/CalendarView.swift

@@ -296,9 +296,6 @@ struct CalendarView: View {
     @State private var calTaskListMode: Bool = false
     /// Year currently at the top of the continuous year scroll (drives the header in .year mode).
     @State private var visibleYear: Int = Calendar.current.component(.year, from: Date())
-    /// 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
@@ -395,6 +392,9 @@ struct CalendarView: View {
                     calDayTaskListView
                 }
             }
+            // Pin to the top so views whose content doesn't fill the height
+            // (week / 3-day timelines) don't float to the bottom of the ZStack.
+            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
 
             FAB { showAddTask = true }
                 .padding(.trailing, 20).padding(.bottom, 10)
@@ -467,25 +467,10 @@ struct CalendarView: View {
         CalendarGrid.monthGrid(for: displayMonth, calendar: cal)
     }
 
-    /// The month grid split into week rows of 7.
-    private func weekRows() -> [[Date]] {
-        let days = gridDays()
-        return stride(from: 0, to: days.count, by: 7).map { Array(days[$0..<min($0 + 7, days.count)]) }
-    }
-
-    /// The single week row that contains the currently selected day.
-    private func selectedWeekRow() -> [Date] {
-        let rows = weekRows()
-        return rows.first { row in row.contains { cal.isDate($0, inSameDayAs: selectedDate) } } ?? (rows.first ?? [])
-    }
-
-    /// Colors of the schedule bars shown under a day in the month grid
-    /// (workout · calendar events · tasks), capped so cells stay compact.
     private func eventDots(for date: Date) -> [Color] {
-        let maxBars = 4
         var dots: [Color] = []
         if workoutVM.program(for: date) != nil { dots.append(AppColors.blue) }
-        if calStore.isAuthorized && dots.count < maxBars {
+        if calStore.isAuthorized && dots.count < 3 {
             let calDay = calStore.events(for: date)
             if !calDay.isEmpty {
                 let calColor = calDay.first.flatMap { Color(cgColor: $0.calendar.cgColor) } ?? AppColors.green
@@ -495,7 +480,7 @@ struct CalendarView: View {
         // Includes recurring occurrences that land on this date.
         let taskDots = taskVM.occurrences(on: date)
             .filter { !$0.isComplete }
-            .prefix(max(0, maxBars - dots.count))
+            .prefix(max(0, 3 - dots.count))
             .map { $0.quadrant.color }
         dots.append(contentsOf: taskDots)
         return dots
@@ -584,59 +569,25 @@ struct CalendarView: View {
             }
             .padding(.horizontal, 16).padding(.top, 14).padding(.bottom, 3)
 
-            // Full month (expanded) or just the selected day's week (collapsed).
-            let rows = monthExpanded ? weekRows() : [selectedWeekRow()]
-            VStack(spacing: 1) {
-                ForEach(rows.indices, id: \.self) { ri in
-                    HStack(spacing: 1) {
-                        ForEach(rows[ri], id: \.self) { date in
+            LazyVGrid(columns: Array(repeating: GridItem(.flexible(), spacing: 1), count: 7), spacing: 1) {
+                ForEach(gridDays(), id: \.self) { date in
                     DayCell(
                         date: date,
                         isCurrentMonth: cal.isDate(date, equalTo: displayMonth, toGranularity: .month),
                         isToday: cal.isDateInToday(date),
                         isSelected: cal.isDate(date, inSameDayAs: selectedDate),
-                                bars: eventDots(for: date),
-                                highlightColumn: !monthExpanded && cal.isDate(date, inSameDayAs: selectedDate)
+                        dots: eventDots(for: date)
                     )
-                            .onTapGesture {
-                                withAnimation(KisaniSpring.snappy) {
-                                    selectedDate = date
-                                    monthExpanded = false   // collapse to this week, reveal the agenda
-                                }
-                            }
-                        }
-                    }
+                    .onTapGesture { withAnimation(KisaniSpring.micro) { selectedDate = date } }
                 }
             }
             .padding(.horizontal, 16)
-            .gesture(DragGesture(minimumDistance: 30).onEnded { v in
-                let dx = v.translation.width, dy = v.translation.height
-                if abs(dx) > abs(dy) {
-                    // Horizontal swipe → previous/next month
-                    if dx < -40 { navigateMonth(1) }
-                    else if dx > 40 { navigateMonth(-1) }
-                } else {
-                    // Vertical drag → collapse to week (up) / expand to month (down)
-                    withAnimation(KisaniSpring.snappy) {
-                        if dy < -30 { monthExpanded = false }
-                        else if dy > 30 { monthExpanded = true }
-                    }
-                }
+            .gesture(DragGesture(minimumDistance: 40).onEnded { v in
+                if v.translation.width < -40 { navigateMonth(1) }
+                else if v.translation.width > 40 { navigateMonth(-1) }
             })
 
-            // Grabber — expand back to the full month, or collapse to the week.
-            Button {
-                withAnimation(KisaniSpring.snappy) { monthExpanded.toggle() }
-            } label: {
-                Image(systemName: monthExpanded ? "chevron.up" : "chevron.down")
-                    .font(.system(size: 11, weight: .semibold))
-                    .foregroundColor(AppColors.text3(cs))
-                    .frame(maxWidth: .infinity).frame(height: 22)
-                    .contentShape(Rectangle())
-            }
-            .buttonStyle(.plain)
-
-            Divider().background(AppColors.border(cs)).padding(.horizontal, 16)
+            Divider().background(AppColors.border(cs)).padding(.horizontal, 16).padding(.top, 6)
 
             ScrollView(showsIndicators: false) {
                 DayTimelineView(
@@ -1742,8 +1693,7 @@ struct AddCalendarHolidaysView: View {
 // MARK: - Day Cell
 struct DayCell: View {
     @Environment(\.colorScheme) private var cs
-    let date: Date; let isCurrentMonth: Bool; let isToday: Bool; let isSelected: Bool; let bars: [Color]
-    var highlightColumn: Bool = false
+    let date: Date; let isCurrentMonth: Bool; let isToday: Bool; let isSelected: Bool; let dots: [Color]
     private let cal = Calendar.current
     var dayNum: String { "\(cal.component(.day, from: date))" }
     /// Locale week-of-year (NOT ISO), intentionally matching the locale-driven grid
@@ -1768,24 +1718,14 @@ struct DayCell: View {
                     Text("W\(weekNum)").font(AppFonts.mono(6.5)).foregroundColor(AppColors.text3(cs)).offset(x: -2, y: -10)
                 }
             }
-            // Schedule bars — one per event/task, stacked (TickTick-style).
-            VStack(spacing: 1.5) {
-                ForEach(bars.indices, id: \.self) { i in
-                    RoundedRectangle(cornerRadius: 1)
-                        .fill(bars[i].opacity(0.85))
-                        .frame(height: 3)
+            HStack(spacing: 2) {
+                ForEach(dots.indices, id: \.self) { i in
+                    Circle().fill(dots[i]).frame(width: 3.5, height: 3.5)
                 }
             }
-            .frame(maxWidth: .infinity, alignment: .top)
-            .padding(.horizontal, 3)
-            Spacer(minLength: 0)
+            .frame(height: 4)
         }
-        .padding(.top, 4)
-        .frame(maxWidth: .infinity).frame(height: 54).contentShape(Rectangle())
-        .background(
-            RoundedRectangle(cornerRadius: 10)
-                .fill(highlightColumn ? AppColors.text3(cs).opacity(0.12) : .clear)
-        )
+        .frame(maxWidth: .infinity).frame(height: 42).contentShape(Rectangle())
     }
 }