Calendar: force timeline fill (dead space) + long-press menu on blocks

KC-49: week/3-day dead space — the outer .frame only allowed fill; force the
timeline ScrollView greedy (.frame maxHeight .infinity) and pin each timeline
root VStack top, so the header pins to the top instead of floating mid-screen.

KC-50: timeline blocks now have a long-press context menu — Complete, Snooze
(15m/1h/tomorrow), and the shared TaskMenuItems (reschedule/move/priority/
category/edit/delete). Events get no menu. CVTimeBlock takes @ViewBuilder menu.

Logs KC-49 (supersedes KC-48) and KC-50 in ISSUES.md.

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

KisaniCal/ISSUES.md

@@ -1407,3 +1407,47 @@ Pinned the top-level content `VStack` with
 `.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)`.
 
 Files: `CalendarView.swift`.
+
+---
+
+## KC-49 — Week/3-day dead space persisted after KC-48
+
+**Status:** Fixed (not build-verified) — supersedes KC-48
+**Reported by:** User ("DEAD SPACE STILL EXISTS")
+**Area:** Calendar / Layout
+
+### Root cause (refined)
+Pinning only the outer container (`.frame(maxHeight: .infinity)`, KC-48) merely
+*allows* fill — it doesn't *force* it. The timeline `ScrollView` returned its
+content size instead of expanding, so the week/3-day root stayed short and the
+`.bottomTrailing` ZStack floated it down, leaving the day header stranded mid-
+screen. Day view happened to fill, so it never showed.
+
+### Fix
+Force the timeline `ScrollView` to be greedy with
+`.frame(maxWidth: .infinity, maxHeight: .infinity)`, and pin each timeline
+view's root `VStack` to fill + top-align. Applied to `weekView` and
+`threeDayView`.
+
+Files: `CalendarView.swift`.
+
+---
+
+## KC-50 — Long-press on a timeline event has no actions
+
+**Status:** Implemented (not build-verified)
+**Reported by:** User
+**Area:** Calendar / Tasks
+
+### Description
+Long-pressing a task block on the day/week/3-day timeline did nothing — it
+should offer the same actions as elsewhere (Complete, Snooze, reschedule, etc.).
+
+### Change
+`CVTimeBlock` now takes `@ViewBuilder menu` content and shows it via
+`.contextMenu`. `cvBlockMenu(for:)` builds it for task-backed items: a Complete
+toggle, a Snooze submenu (15 min / 1 hr / tomorrow), then the shared
+`TaskMenuItems` (pin, reschedule, move, priority, category, edit, delete).
+Events (no `taskID`) get no menu.
+
+Files: `CalendarView.swift`.

KisaniCal/Views/CalendarView.swift

@@ -828,8 +828,10 @@ struct CalendarView: View {
                 ScrollView(showsIndicators: false) {
                     cvTimeGrid(days: days).padding(.bottom, 40)
                 }
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
             }
         }
+        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
     }
 
     // Grid layout: the 7 days as cards (2 columns), each listing its schedule.
@@ -909,7 +911,9 @@ struct CalendarView: View {
             ScrollView(showsIndicators: false) {
                 cvTimeGrid(days: days).padding(.bottom, 40)
             }
+            .frame(maxWidth: .infinity, maxHeight: .infinity)
         }
+        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
     }
 
     // MARK: - Day
@@ -1043,13 +1047,45 @@ struct CalendarView: View {
                     draggable: item.taskID != nil && !item.recurring,
                     onReschedule: { newStartMin in
                         rescheduleTask(id: item.taskID, on: date, toStartMin: newStartMin)
-                    }
+                    },
+                    menu: { cvBlockMenu(for: item) }
                 )
             }
         }
         .frame(maxWidth: .infinity)
     }
 
+    /// Long-press menu for a timeline block. Task items get the full shared menu
+    /// (Complete / Snooze / date / move / edit / delete); events get nothing.
+    @ViewBuilder
+    private func cvBlockMenu(for item: CVTimeItem) -> some View {
+        if let id = item.taskID, let task = taskVM.tasks.first(where: { $0.id == id }) {
+            Button {
+                withAnimation(KisaniSpring.snappy) { taskVM.toggle(task) }
+            } label: {
+                Label(task.isComplete ? "Mark Incomplete" : "Complete", systemImage: "checkmark.circle")
+            }
+            Menu {
+                Button { taskVM.postpone(task, minutes: 15) } label: { Label("15 minutes", systemImage: "clock") }
+                Button { taskVM.postpone(task, minutes: 60) } label: { Label("1 hour", systemImage: "clock") }
+                Button { taskVM.postpone(task, days: 1) } label: { Label("Tomorrow", systemImage: "sun.max") }
+            } label: {
+                Label("Snooze", systemImage: "clock.arrow.circlepath")
+            }
+            TaskMenuItems(
+                task: task,
+                onPin:         { taskVM.pin($0) },
+                onSetDate:     { taskVM.setDate($0, date: $1) },
+                onPostponeMinutes: { taskVM.postpone($0, minutes: $1) },
+                onMove:        { taskVM.moveToQuadrant(taskID: $0.id, quadrant: $1) },
+                onSetPriority: { taskVM.setPriority($0, priority: $1) },
+                onSetCategory: { taskVM.setCategory($0, category: $1) },
+                onEdit:        { editingTask = $0 },
+                onDelete:      { taskVM.delete($0) }
+            )
+        }
+    }
+
     /// Move a timed task to a new start minute on the same day (drag-to-reschedule).
     private func rescheduleTask(id: UUID?, on date: Date, toStartMin newStartMin: Int) {
         guard let id, let task = taskVM.tasks.first(where: { $0.id == id }) else { return }
@@ -1161,13 +1197,14 @@ struct CVTimeItem: Identifiable {
 // A single timed block on the week/day timeline. Task-backed blocks can be
 // dragged vertically to reschedule (snapped to 15-minute steps); events and
 // recurring tasks render fixed.
-private struct CVTimeBlock: View {
+private struct CVTimeBlock<MenuContent: View>: View {
     let item: CVTimeItem
     let top: CGFloat
     let height: CGFloat
     let hourH: CGFloat
     let draggable: Bool
     let onReschedule: (Int) -> Void
+    @ViewBuilder let menu: () -> MenuContent
     @GestureState private var dragY: CGFloat = 0
 
     private var block: some View {
@@ -1190,18 +1227,21 @@ private struct CVTimeBlock: View {
     }
 
     var body: some View {
-        if draggable {
-            block.gesture(
-                DragGesture(minimumDistance: 6)
-                    .updating($dragY) { value, state, _ in state = value.translation.height }
-                    .onEnded { value in
-                        let deltaMin = Int((Double(value.translation.height) / Double(hourH) * 60).rounded() / 15) * 15
-                        onReschedule(item.startMin + deltaMin)
-                    }
-            )
-        } else {
-            block
+        Group {
+            if draggable {
+                block.gesture(
+                    DragGesture(minimumDistance: 6)
+                        .updating($dragY) { value, state, _ in state = value.translation.height }
+                        .onEnded { value in
+                            let deltaMin = Int((Double(value.translation.height) / Double(hourH) * 60).rounded() / 15) * 15
+                            onReschedule(item.startMin + deltaMin)
+                        }
+                )
+            } else {
+                block
+            }
         }
+        .contextMenu { menu() }   // empty for events → no menu; task actions otherwise
     }
 }