Add unified task menu, Live Activity, and calendar event actions

Task context menu (new shared TaskMenuItems) consistent across Today,
Matrix, and Calendar: Pin · Date · Move · Priority · Tags · Add to Live
Activity · Delete. Adds TaskViewModel.setPriority.

Live Activity (ActivityKit):
- TaskActivityAttributes shared between app and widget targets
- LiveActivityManager (start/update/end/toggle, iOS 16.1+)
- TaskLiveActivity widget: lock-screen banner + Dynamic Island
- NSSupportsLiveActivities via project.yml; project regenerated

Calendar events (non-subscription, writable only):
- Edit via system EKEventEditViewController (EventEditView wrapper)
- Delete via new CalendarStore.deleteEvent

Also sweeps in prior in-progress edits already present in the working
tree (AuthManager, NotificationManager, TaskItem, task views) and the
updated ISSUES.md.

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

KisaniCalWidgets/KisaniCalWidgets.swift

@@ -111,5 +111,6 @@ struct KisaniWidgetBundle: WidgetBundle {
         TasksCompleteWidget()
         LockScreenWidget()
         LockScreenCircularWidget()
+        TaskLiveActivity()
     }
 }

KisaniCalWidgets/TaskLiveActivity.swift

@@ -0,0 +1,74 @@
+import ActivityKit
+import WidgetKit
+import SwiftUI
+
+@available(iOS 16.1, *)
+struct TaskLiveActivity: Widget {
+    private let accent = Color(red: 0.93, green: 0.42, blue: 0.20) // brand orange
+
+    var body: some WidgetConfiguration {
+        ActivityConfiguration(for: TaskActivityAttributes.self) { context in
+            // ── Lock screen / banner ──
+            HStack(spacing: 12) {
+                Image(systemName: context.state.isComplete ? "checkmark.circle.fill" : "circle")
+                    .font(.system(size: 22))
+                    .foregroundColor(context.state.isComplete ? .green : accent)
+                VStack(alignment: .leading, spacing: 2) {
+                    Text(context.attributes.title)
+                        .font(.system(size: 15, weight: .semibold))
+                        .foregroundColor(.white)
+                        .lineLimit(1)
+                        .strikethrough(context.state.isComplete)
+                    if let due = context.state.dueDate {
+                        Text(due, style: context.state.isComplete ? .date : .relative)
+                            .font(.system(size: 12, design: .monospaced))
+                            .foregroundColor(.white.opacity(0.6))
+                    }
+                }
+                Spacer()
+                if let due = context.state.dueDate, !context.state.isComplete {
+                    Text(due, style: .timer)
+                        .font(.system(size: 16, weight: .bold, design: .monospaced))
+                        .foregroundColor(accent)
+                        .frame(maxWidth: 70)
+                }
+            }
+            .padding(.horizontal, 16)
+            .padding(.vertical, 12)
+            .activityBackgroundTint(Color.black.opacity(0.55))
+            .activitySystemActionForegroundColor(.white)
+
+        } dynamicIsland: { context in
+            DynamicIsland {
+                DynamicIslandExpandedRegion(.leading) {
+                    Image(systemName: "checklist")
+                        .foregroundColor(accent)
+                }
+                DynamicIslandExpandedRegion(.trailing) {
+                    if let due = context.state.dueDate, !context.state.isComplete {
+                        Text(due, style: .timer)
+                            .font(.system(.body, design: .monospaced))
+                            .foregroundColor(accent)
+                            .frame(maxWidth: 64)
+                    }
+                }
+                DynamicIslandExpandedRegion(.center) {
+                    Text(context.attributes.title)
+                        .font(.system(size: 14, weight: .semibold))
+                        .lineLimit(1)
+                }
+            } compactLeading: {
+                Image(systemName: "checklist").foregroundColor(accent)
+            } compactTrailing: {
+                if let due = context.state.dueDate, !context.state.isComplete {
+                    Text(due, style: .timer)
+                        .font(.system(.caption2, design: .monospaced))
+                        .foregroundColor(accent)
+                        .frame(maxWidth: 44)
+                }
+            } minimal: {
+                Image(systemName: "checklist").foregroundColor(accent)
+            }
+        }
+    }
+}