feat: add settings link in dashboard header

ios/ChronoMind/Shared/Notifications/NotificationScheduler.swift

@@ -0,0 +1,188 @@
+// ── Notification Scheduling ────────────────────────────────────
+// UNUserNotificationCenter wrapper for pre-warning cascade + timer fire
+// iOS-native notification system
+
+import Foundation
+import UserNotifications
+
+// MARK: - Notification Manager
+
+@MainActor
+final class CMNotificationManager: ObservableObject {
+    static let shared = CMNotificationManager()
+
+    @Published var isAuthorized = false
+
+    private init() {}
+
+    // MARK: - Permission
+
+    func requestPermission() async {
+        do {
+            let granted = try await UNUserNotificationCenter.current()
+                .requestAuthorization(options: [.alert, .sound, .badge, .criticalAlert])
+            isAuthorized = granted
+        } catch {
+            isAuthorized = false
+        }
+    }
+
+    func checkPermission() async {
+        let settings = await UNUserNotificationCenter.current().notificationSettings()
+        isAuthorized = settings.authorizationStatus == .authorized
+    }
+
+    // MARK: - Schedule Timer Notifications
+
+    /// Schedule all cascade warnings + final fire notification for a timer
+    func scheduleNotifications(for timer: CMTimer) {
+        // Remove existing notifications for this timer
+        removeNotifications(for: timer.id)
+
+        // Schedule cascade warnings
+        for warning in timer.warnings where !warning.fired {
+            scheduleWarning(timer: timer, warning: warning)
+        }
+
+        // Schedule fire notification
+        scheduleFireNotification(timer: timer)
+    }
+
+    /// Remove all scheduled notifications for a timer
+    func removeNotifications(for timerId: String) {
+        let center = UNUserNotificationCenter.current()
+        // Remove all notifications with this timer's ID prefix
+        center.getPendingNotificationRequests { requests in
+            let ids = requests
+                .filter { $0.identifier.hasPrefix("cm-\(timerId)") }
+                .map { $0.identifier }
+            center.removePendingNotificationRequests(withIdentifiers: ids)
+        }
+    }
+
+    /// Remove all ChronoMind notifications
+    func removeAllNotifications() {
+        UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
+    }
+
+    // MARK: - Private
+
+    private func scheduleWarning(timer: CMTimer, warning: CascadeWarning) {
+        let content = UNMutableNotificationContent()
+        let timeStr = formatMinutesBefore(warning.minutesBefore)
+        content.title = "⏰ \(timer.label) in \(timeStr)"
+        content.body = "Pre-warning: \"\(timer.label)\" fires in \(timeStr)"
+        content.sound = soundForUrgency(timer.urgency, isWarning: true)
+        content.categoryIdentifier = "TIMER_WARNING"
+        content.userInfo = [
+            "timerId": timer.id,
+            "warningId": warning.id,
+            "type": "warning",
+        ]
+
+        // Use the warning's scheduled time
+        let trigger = UNTimeIntervalNotificationTrigger(
+            timeInterval: max(1, warning.scheduledTime.timeIntervalSinceNow),
+            repeats: false
+        )
+
+        let request = UNNotificationRequest(
+            identifier: "cm-\(timer.id)-warning-\(warning.id)",
+            content: content,
+            trigger: trigger
+        )
+
+        UNUserNotificationCenter.current().add(request)
+    }
+
+    private func scheduleFireNotification(timer: CMTimer) {
+        let content = UNMutableNotificationContent()
+        content.title = "🔔 \(timer.label) — NOW!"
+        content.body = "Timer \"\(timer.label)\" is firing!"
+        content.sound = soundForUrgency(timer.urgency, isWarning: false)
+        content.categoryIdentifier = "TIMER_FIRE"
+        content.userInfo = [
+            "timerId": timer.id,
+            "type": "fire",
+        ]
+
+        // Interrupt level for important/critical
+        if #available(iOS 15.0, *) {
+            switch timer.urgency {
+            case .critical:
+                content.interruptionLevel = .critical
+            case .important:
+                content.interruptionLevel = .timeSensitive
+            case .standard:
+                content.interruptionLevel = .active
+            case .gentle:
+                content.interruptionLevel = .passive
+            case .passive:
+                content.interruptionLevel = .passive
+            }
+        }
+
+        let trigger = UNTimeIntervalNotificationTrigger(
+            timeInterval: max(1, timer.targetTime.timeIntervalSinceNow),
+            repeats: false
+        )
+
+        let request = UNNotificationRequest(
+            identifier: "cm-\(timer.id)-fire",
+            content: content,
+            trigger: trigger
+        )
+
+        UNUserNotificationCenter.current().add(request)
+    }
+
+    private func soundForUrgency(_ urgency: UrgencyLevel, isWarning: Bool) -> UNNotificationSound {
+        let config = getUrgencyConfig(urgency)
+        guard config.soundEnabled else { return .none }
+
+        if urgency == .critical && !isWarning {
+            // Critical fires get the default critical alert sound
+            if #available(iOS 12.0, *) {
+                return .defaultCritical
+            }
+        }
+
+        return .default
+    }
+
+    // MARK: - Notification Categories
+
+    func registerCategories() {
+        let snooze5 = UNNotificationAction(
+            identifier: "SNOOZE_5",
+            title: "Snooze 5m",
+            options: []
+        )
+        let snooze15 = UNNotificationAction(
+            identifier: "SNOOZE_15",
+            title: "Snooze 15m",
+            options: []
+        )
+        let dismiss = UNNotificationAction(
+            identifier: "DISMISS",
+            title: "Dismiss",
+            options: [.destructive]
+        )
+
+        let fireCategory = UNNotificationCategory(
+            identifier: "TIMER_FIRE",
+            actions: [snooze5, snooze15, dismiss],
+            intentIdentifiers: [],
+            options: []
+        )
+
+        let warningCategory = UNNotificationCategory(
+            identifier: "TIMER_WARNING",
+            actions: [dismiss],
+            intentIdentifiers: [],
+            options: []
+        )
+
+        UNUserNotificationCenter.current().setNotificationCategories([fireCategory, warningCategory])
+    }
+}

ios/ChronoMind/Shared/Theme/ChronoMindTheme.swift

@@ -0,0 +1,117 @@
+// ── ChronoMind Design Tokens ───────────────────────────────────
+// Colors from PRD Section 9 (--cm-* CSS vars → Swift Color literals)
+// Typography from PRD Section 9.2
+
+import SwiftUI
+
+// MARK: - Colors
+
+enum CMColors {
+    // Backgrounds
+    static let bg = Color(hex: 0x0A0B0F)
+    static let surface = Color(hex: 0x12141D)
+    static let surfaceHover = Color(hex: 0x1A1D2A)
+    static let border = Color(hex: 0x2A2D3A)
+
+    // Text
+    static let text = Color(hex: 0xE8ECF4)
+    static let textSecondary = Color(hex: 0x8A92A6)
+    static let textMuted = Color(hex: 0x5A6178)
+
+    // Urgency
+    static let critical = Color(hex: 0xFF4757)
+    static let important = Color(hex: 0xFF9F43)
+    static let standard = Color(hex: 0xFECA57)
+    static let gentle = Color(hex: 0x2ED573)
+    static let passive = Color(hex: 0x5B8DEE)
+
+    // Accent
+    static let accent = Color(hex: 0x5B8DEE)
+    static let accentGlow = Color(hex: 0x5B8DEE, alpha: 0.2)
+
+    // Semantic
+    static let success = Color(hex: 0x2ED573)
+    static let warning = Color(hex: 0xFECA57)
+    static let error = Color(hex: 0xFF4757)
+
+    // Light theme variants
+    static let lightBg = Color(hex: 0xF8F9FC)
+    static let lightSurface = Color.white
+    static let lightSurfaceHover = Color(hex: 0xF0F2F8)
+    static let lightBorder = Color(hex: 0xE2E5EE)
+    static let lightText = Color(hex: 0x1A1D2A)
+    static let lightTextSecondary = Color(hex: 0x5A6178)
+    static let lightTextMuted = Color(hex: 0x8A92A6)
+
+    /// Get urgency color for a given level
+    static func urgencyColor(_ level: UrgencyLevel) -> Color {
+        switch level {
+        case .critical: return critical
+        case .important: return important
+        case .standard: return standard
+        case .gentle: return gentle
+        case .passive: return passive
+        }
+    }
+
+    /// Get urgency background color (15% opacity)
+    static func urgencyBg(_ level: UrgencyLevel) -> Color {
+        urgencyColor(level).opacity(0.15)
+    }
+
+    /// Get urgency border color (40% opacity)
+    static func urgencyBorder(_ level: UrgencyLevel) -> Color {
+        urgencyColor(level).opacity(0.4)
+    }
+}
+
+// MARK: - Typography
+
+enum CMFonts {
+    /// Display font — Space Grotesk (clock face, timer digits)
+    static func display(size: CGFloat, weight: Font.Weight = .bold) -> Font {
+        .system(size: size, weight: weight, design: .rounded)
+    }
+
+    /// Body font — Inter/SF Pro equivalent
+    static func body(size: CGFloat, weight: Font.Weight = .regular) -> Font {
+        .system(size: size, weight: weight, design: .default)
+    }
+
+    /// Mono font — JetBrains Mono (countdown digits, time displays)
+    static func mono(size: CGFloat, weight: Font.Weight = .regular) -> Font {
+        .system(size: size, weight: weight, design: .monospaced)
+    }
+}
+
+// MARK: - Spacing
+
+enum CMSpacing {
+    static let xxs: CGFloat = 2
+    static let xs: CGFloat = 4
+    static let sm: CGFloat = 8
+    static let md: CGFloat = 12
+    static let lg: CGFloat = 16
+    static let xl: CGFloat = 24
+    static let xxl: CGFloat = 32
+    static let xxxl: CGFloat = 48
+}
+
+// MARK: - Corner Radius
+
+enum CMRadius {
+    static let sm: CGFloat = 8
+    static let md: CGFloat = 12
+    static let lg: CGFloat = 16
+    static let xl: CGFloat = 20
+    static let full: CGFloat = 999
+}
+
+// MARK: - Shadows
+
+enum CMShadow {
+    static let sm = Color.black.opacity(0.1)
+    static let md = Color.black.opacity(0.2)
+    static let lg = Color.black.opacity(0.3)
+    static let glow = CMColors.accent.opacity(0.3)
+}

web/src/components/Dashboard.tsx

@@ -11,7 +11,8 @@ import { CreateTimerModal } from './CreateTimerModal';
 import { AlarmOverlay } from './AlarmOverlay';
 import { requestNotificationPermission } from '@/lib/notifications';
 import { formatTime, formatDate } from '@/lib/format';
-import { Plus, Clock, Bell, Keyboard, Sun, Moon } from 'lucide-react';
+import { Plus, Clock, Bell, Keyboard, Sun, Moon, Settings } from 'lucide-react';
+import Link from 'next/link';
 import { FeedbackButton } from './FeedbackButton';
 import { useTheme } from '@/lib/use-theme';
 
@@ -134,6 +135,14 @@ export function Dashboard() {
             >
               {theme === 'dark' ? <Sun size={18} /> : <Moon size={18} />}
             </button>
+            <Link
+              href="/settings"
+              className="p-2 rounded-lg transition-colors"
+              style={{ color: 'var(--cm-text-tertiary)' }}
+              title="Settings"
+            >
+              <Settings size={18} />
+            </Link>
             <button
               onClick={() => setShowShortcuts((p) => !p)}
               className="p-2 rounded-lg transition-colors cursor-pointer"