feat: major app overhaul — API fixes, glassmorphism UI, health dashboard, notifications

API Integration:
- Fix logHabit: send "date" instead of "completed_at"
- Fix FinanceCategory: "icon" → "emoji" to match API
- Fix task priorities: remove level 4, keep 1-3 matching API
- Fix habit frequencies: map monthly/interval → "custom" for API
- Add token refresh (401 → auto retry with new token)
- Add proper error handling (remove try? in save functions, show errors in UI)
- Add date field to savings transactions
- Add MonthlyPaymentDetail and OverduePayment models
- Fix habit completedToday: compute on client from logs (API doesn't return it)
- Filter habits by day of week on client (daily/weekly/monthly/interval)

Design System (glassmorphism):
- New DesignSystem.swift: Theme colors, GlassCard modifier, GlowIcon, GlowStatCard
- Custom tab bar with per-tab glow colors (VStack layout, not ZStack overlay)
- Deep dark background #06060f across all views
- Glass cards with gradient fill + stroke throughout app
- App icon: glassmorphism style with teal glow

Health Dashboard:
- Compact ReadinessBanner with recommendation text
- 8 metric tiles: sleep, HR, HRV, steps, SpO2, respiratory rate, energy, distance
- Each tile with status indicator (good/ok/bad) and hint text
- Heart rate card (min/avg/max)
- Weekly trends card (averages)
- Recovery score (weighted: 40% sleep, 35% HRV, 25% RHR)
- Tips card with actionable recommendations
- Sleep detail view with hypnogram (step chart of phases)
- Sleep segments timeline from HealthKit (deep/rem/core/awake with exact times)
- Line chart replacing bar chart for weekly data
- Collect respiratory_rate and sleep phases with timestamps from HealthKit
- Background sync every ~30min via BGProcessingTask

Notifications:
- NotificationService for local push notifications
- Morning/evening reminders with native DatePicker (wheel)
- Payment reminders: 5 days, 1 day, and day-of for recurring savings
- Notification settings in Settings tab

UI Fixes:
- Fix color picker overflow: HStack → LazyVGrid 5 columns
- Fix sheet headers: shorter text, proper padding
- Fix task/habit toggle: separate tap zones (checkbox vs edit)
- Fix deprecated onChange syntax for iOS 17+
- Savings overview: real monthly payments and detailed overdues from API
- Settings: timezone as Menu picker, removed Telegram/server notifications sections
- All sheets use .presentationDetents([.large])

Config:
- project.yml: real DEVELOPMENT_TEAM, HealthKit + BackgroundModes capabilities
- Info.plist: BGTaskScheduler + UIBackgroundModes
- Assets.xcassets with AppIcon
- CLAUDE.md project documentation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

PulseHealth/Models/HealthModels.swift

@@ -28,6 +28,33 @@ struct LatestHealthResponse: Codable {
     let hrv: HRVData?
     let steps: StepsData?
     let activeEnergy: EnergyData?
+    let bloodOxygen: BloodOxygenData?
+    let respiratoryRate: RespiratoryRateData?
+    let distance: DistanceData?
+
+    enum CodingKeys: String, CodingKey {
+        case sleep, steps, hrv, distance
+        case heartRate = "heartRate"
+        case restingHeartRate = "restingHeartRate"
+        case activeEnergy = "activeEnergy"
+        case bloodOxygen = "spo2"
+        case respiratoryRate = "respiratoryRate"
+    }
+}
+
+struct BloodOxygenData: Codable {
+    let avg: Double?
+    let min: Double?
+    let max: Double?
+}
+
+struct RespiratoryRateData: Codable {
+    let avg: Double?
+}
+
+struct DistanceData: Codable {
+    let total: Double?
+    let units: String?
 }
 
 struct SleepData: Codable {
@@ -37,6 +64,42 @@ struct SleepData: Codable {
     let core: Double?
 }
 
+// Local-only model for sleep timeline (not from API)
+struct SleepSegment: Identifiable {
+    let id = UUID()
+    let phase: SleepPhaseType
+    let start: Date
+    let end: Date
+    var duration: TimeInterval { end.timeIntervalSince(start) }
+}
+
+enum SleepPhaseType: String {
+    case deep = "Глубокий"
+    case rem = "REM"
+    case core = "Базовый"
+    case awake = "Пробуждение"
+
+    var color: Color {
+        switch self {
+        case .deep: return Color(hex: "7c3aed")
+        case .rem: return Color(hex: "a78bfa")
+        case .core: return Color(hex: "c4b5fd")
+        case .awake: return Color(hex: "ff4757")
+        }
+    }
+
+    var icon: String {
+        switch self {
+        case .deep: return "moon.zzz.fill"
+        case .rem: return "brain.head.profile"
+        case .core: return "moon.fill"
+        case .awake: return "eye.fill"
+        }
+    }
+}
+
+import SwiftUI
+
 struct HeartRateData: Codable {
     let avg: Int?
     let min: Int?