fix(ios): resolve Swift compile errors for iOS 26 / Xcode 26

- Fix CloudKitSyncManager deinit concurrency violation
- Replace deprecated List(selection:) with VStack+ForEach sidebar
- Replace removed Animation.none with Animation.linear(duration: 0)
- Fix CountdownRing initializer parameter mismatch
- Unwrap optional timer.duration in ShareableTimerManager and DataExportManager
- Add missing .event case to exhaustive switch
- Change CascadeWarning.scheduledTime from let to var
- Fix CalendarSyncManager CMTimer init (add elapsedBeforePause, remove non-existent params)
- Add missing UserNotifications import in SleepManager
- Remove parameterized App Intents phrases (iOS 26 restriction)
- Temporarily remove watchOS target dependency for iOS build

ios/ChronoMind.xcodeproj/xcshareddata/xcschemes/ChronoMind.xcscheme

@@ -35,6 +35,20 @@
                ReferencedContainer = "container:ChronoMind.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "7028351BB1945332C6B77BA3"
+               BuildableName = "ChronoMindWidgets.appex"
+               BlueprintName = "ChronoMindWidgets"
+               ReferencedContainer = "container:ChronoMind.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
       </BuildActionEntries>
    </BuildAction>
    <TestAction

ios/ChronoMind.xcodeproj/xcshareddata/xcschemes/ChronoMindMac.xcscheme

@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1600"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      runPostActionsOnFailure = "NO">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C0E0F171B21355486B744330"
+               BuildableName = "ChronoMindMac.app"
+               BlueprintName = "ChronoMindMac"
+               ReferencedContainer = "container:ChronoMind.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      onlyGenerateCoverageForSpecifiedTargets = "NO">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "C0E0F171B21355486B744330"
+            BuildableName = "ChronoMindMac.app"
+            BlueprintName = "ChronoMindMac"
+            ReferencedContainer = "container:ChronoMind.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "C0E0F171B21355486B744330"
+            BuildableName = "ChronoMindMac.app"
+            BlueprintName = "ChronoMindMac"
+            ReferencedContainer = "container:ChronoMind.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "C0E0F171B21355486B744330"
+            BuildableName = "ChronoMindMac.app"
+            BlueprintName = "ChronoMindMac"
+            ReferencedContainer = "container:ChronoMind.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

ios/ChronoMind.xcodeproj/xcshareddata/xcschemes/ChronoMindWatch.xcscheme

@@ -0,0 +1,107 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1600"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      runPostActionsOnFailure = "NO">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "E15B7150D85F1ED89481E2A0"
+               BuildableName = "ChronoMindWatch.app"
+               BlueprintName = "ChronoMindWatch"
+               ReferencedContainer = "container:ChronoMind.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "8A2AE3A5C26A2CC7420F50C0"
+               BuildableName = "ChronoMindWatchComplications.appex"
+               BlueprintName = "ChronoMindWatchComplications"
+               ReferencedContainer = "container:ChronoMind.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      onlyGenerateCoverageForSpecifiedTargets = "NO">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "E15B7150D85F1ED89481E2A0"
+            BuildableName = "ChronoMindWatch.app"
+            BlueprintName = "ChronoMindWatch"
+            ReferencedContainer = "container:ChronoMind.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "E15B7150D85F1ED89481E2A0"
+            BuildableName = "ChronoMindWatch.app"
+            BlueprintName = "ChronoMindWatch"
+            ReferencedContainer = "container:ChronoMind.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "E15B7150D85F1ED89481E2A0"
+            BuildableName = "ChronoMindWatch.app"
+            BlueprintName = "ChronoMindWatch"
+            ReferencedContainer = "container:ChronoMind.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

ios/ChronoMind/App/ContentView.swift

@@ -72,13 +72,23 @@ struct ContentView: View {
     private var iPadLayout: some View {
         NavigationSplitView {
             // Sidebar
-            List(Tab.allCases, selection: $selectedTab) { tab in
+            VStack(spacing: 0) {
-                Label(tab.rawValue, systemImage: tab.icon)
+                ForEach(Tab.allCases) { tab in
-                    .tag(tab)
+                    Button {
+                        selectedTab = tab
+                    } label: {
+                        Label(tab.rawValue, systemImage: tab.icon)
+                            .frame(maxWidth: .infinity, alignment: .leading)
+                            .padding(.horizontal, 16)
+                            .padding(.vertical, 10)
+                            .background(selectedTab == tab ? CMColors.accent.opacity(0.15) : Color.clear)
+                            .cornerRadius(8)
+                    }
+                    .buttonStyle(.plain)
+                }
             }
+            .padding(.horizontal, 8)
             .navigationTitle("ChronoMind")
-            .listStyle(.sidebar)
-            .scrollContentBackground(.hidden)
             .background(CMColors.bg)
         } detail: {
             // Detail pane
@@ -155,8 +165,14 @@ struct ContentView: View {
 
                 // Countdown
                 CountdownRing(
-                    timer: timer,
+                    progress: {
-                    now: timerStore.now,
+                        guard let duration = timer.duration, duration > 0 else { return 0 }
+                        let remaining = max(0, timer.targetTime.timeIntervalSince(timerStore.now))
+                        return 1.0 - (remaining / duration)
+                    }(),
+                    urgency: timer.urgency,
+                    remainingSeconds: max(0, timer.targetTime.timeIntervalSince(timerStore.now)),
+                    totalSeconds: timer.duration ?? 0,
                     size: 180
                 )
                 .frame(maxWidth: .infinity)

ios/ChronoMind/Shared/Accessibility/AccessibilityHelpers.swift

@@ -80,7 +80,7 @@ struct ReduceMotionModifier: ViewModifier {
 
 extension View {
     /// Apply animation that respects Reduce Motion setting
-    func motionSafe(_ animation: Animation, reduced: Animation = .none) -> some View {
+    func motionSafe(_ animation: Animation, reduced: Animation = .linear(duration: 0)) -> some View {
         modifier(ReduceMotionModifier(animation: animation, reducedAnimation: reduced))
     }
 }

ios/ChronoMind/Shared/Calendar/CalendarSyncManager.swift

@@ -142,16 +142,16 @@ final class CalendarSyncManager: ObservableObject {
 
         var timer = CMTimer(
             id: stableId,
+            type: .alarm,
             label: event.title ?? "Calendar Event",
             description: event.location,
-            type: .alarm,
-            state: .active,
             urgency: urgency,
-            duration: event.endDate.timeIntervalSince(startDate),
+            state: .active,
             targetTime: startDate,
+            duration: event.endDate.timeIntervalSince(startDate),
             createdAt: Date(),
             startedAt: Date(),
-            category: "calendar",
+            elapsedBeforePause: 0,
             cascade: CascadeConfig(preset: .standard, intervals: []),
             warnings: calculateCascadeWarnings(
                 targetTime: startDate,
@@ -159,9 +159,7 @@ final class CalendarSyncManager: ObservableObject {
                 now: Date()
             ),
             snoozeCount: 0,
-            isCalendarSync: true,
+            category: "calendar"
-            calendarEventId: event.eventIdentifier,
-            calendarColor: event.calendar.cgColor
         )
 
         return timer

ios/ChronoMind/Shared/Cloud/CloudKitSyncManager.swift

@@ -40,7 +40,9 @@ final class CloudKitSyncManager: ObservableObject {
     }
 
     deinit {
-        stopSync()
+        if let observer = observer {
+            NotificationCenter.default.removeObserver(observer)
+        }
     }
 
     // MARK: - Sync Control

ios/ChronoMind/Shared/Data/DataExportManager.swift

@@ -187,7 +187,7 @@ struct TimerExport: Codable {
         self.type = timer.type.rawValue
         self.state = timer.state.rawValue
         self.urgency = timer.urgency.rawValue
-        self.duration = timer.duration
+        self.duration = timer.duration ?? 0
         self.targetTime = timer.targetTime
         self.createdAt = timer.createdAt
         self.completedAt = timer.completedAt

ios/ChronoMind/Shared/Sharing/ShareableTimerManager.swift

@@ -27,7 +27,7 @@ final class ShareableTimerManager: ObservableObject {
             code: shareCode,
             label: timer.label,
             type: timer.type,
-            durationSeconds: timer.duration,
+            durationSeconds: timer.duration ?? 0,
             urgency: timer.urgency,
             cascadePreset: timer.cascade.preset,
             category: timer.category,
@@ -99,6 +99,14 @@ final class ShareableTimerManager: ObservableObject {
                     rounds: 4
                 )
             ))
+        case .event:
+            // Events need a target date — set to duration from now
+            return createAlarm(CreateAlarmParams(
+                label: shared.label,
+                targetTime: Date().addingTimeInterval(shared.durationSeconds),
+                urgency: shared.urgency,
+                cascade: CascadeConfig(preset: shared.cascadePreset, intervals: [])
+            ))
         }
     }
 

ios/ChronoMind/Shared/Sleep/SleepManager.swift

@@ -5,6 +5,7 @@
 import Foundation
 import HealthKit
 import Combine
+import UserNotifications
 
 @MainActor
 final class SleepManager: ObservableObject {

ios/ChronoMind/Shared/TimerEngine/Cascade.swift

@@ -47,7 +47,7 @@ struct CascadeWarning: Codable, Identifiable, Equatable {
     let minutesBefore: Int
     var fired: Bool
     var firedAt: Date?
-    let scheduledTime: Date
+    var scheduledTime: Date
 
     static func == (lhs: CascadeWarning, rhs: CascadeWarning) -> Bool {
         lhs.id == rhs.id

ios/ChronoMind/SiriShortcuts/TimerAppIntents.swift

@@ -135,8 +135,6 @@ struct ChronoMindShortcutsProvider: AppShortcutsProvider {
             intent: SetTimerIntent(),
             phrases: [
                 "Set a timer in \(.applicationName)",
-                "Set a \(\.$minutes) minute timer in \(.applicationName)",
-                "Start a \(\.$minutes) minute timer called \(\.$label) in \(.applicationName)",
             ],
             shortTitle: "Set Timer",
             systemImageName: "timer"
@@ -147,7 +145,6 @@ struct ChronoMindShortcutsProvider: AppShortcutsProvider {
             phrases: [
                 "Start Pomodoro in \(.applicationName)",
                 "Start a focus session in \(.applicationName)",
-                "Start a \(\.$workMinutes) minute Pomodoro in \(.applicationName)",
             ],
             shortTitle: "Start Pomodoro",
             systemImageName: "target"

ios/ChronoMindMac/ChronoMindMac.entitlements

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.com.chronomind.shared</string>
+	</array>
+	<key>com.apple.security.network.client</key>
+	<true/>
+</dict>
+</plist>

ios/project.yml

@@ -48,7 +48,7 @@ targets:
         INFOPLIST_KEY_NSSupportsLiveActivities: true
     dependencies:
       - target: ChronoMindWidgets
-      - target: ChronoMindWatch
+      # - target: ChronoMindWatch  # Temporarily removed — watchOS target can't build on iOS Simulator
       - package: ByteLystPlatformSDK
     entitlements:
       path: ChronoMind/ChronoMind.entitlements