feat: full Pulse Mobile implementation - all modules

- Phase 0: project.yml fixes (CODE_SIGN_ENTITLEMENTS confirmed)
- Phase 1: Enhanced models (HabitModels, TaskModels, FinanceModels, SavingsModels, UserModels)
- Phase 1: Enhanced APIService with all endpoints (habits/log/stats, tasks/uncomplete, finance/analytics, savings/*)
- Phase 2: DashboardView rewrite - day progress bar, 4 stat cards, habit/task lists with Undo (3 sec)
- Phase 3: TrackerView - HabitListView (streak badge, swipe delete, archive), TaskListView (priority, overdue), StatisticsView (heatmap 84 days, line chart, bar chart via Swift Charts)
- Phase 4: FinanceView rewrite - month picker, summary card, top expenses progress bars, pie chart, line chart, transactions by day, analytics tab with bar chart + month comparison
- Phase 5: SavingsView rewrite - overview with overdue block, categories tab with type icons, operations tab with category filter + add sheet
- Phase 6: SettingsView - dark/light theme, profile edit, telegram chat id, notifications toggle + time, timezone picker, logout
- Added: AddHabitView with weekly day selector + interval days
- Added: AddTaskView with icon/color/due date picker
- Haptic feedback on all toggle actions

PulseHealth/Models/HabitModels.swift

@@ -1,16 +1,22 @@
 import Foundation
 
-enum HabitFrequency: String, Codable {
-    case daily, weekly, monthly
+// MARK: - Habit Frequency
+
+enum HabitFrequency: String, Codable, CaseIterable {
+    case daily, weekly, monthly, interval, custom
     var displayName: String {
         switch self {
         case .daily: return "Ежедневно"
         case .weekly: return "Еженедельно"
         case .monthly: return "Ежемесячно"
+        case .interval: return "Через N дней"
+        case .custom: return "Особое"
         }
     }
 }
 
+// MARK: - Habit
+
 struct Habit: Codable, Identifiable {
     let id: Int
     var name: String
@@ -25,6 +31,13 @@ struct Habit: Codable, Identifiable {
     var longestStreak: Int?
     var completedToday: Bool?
     var totalCompleted: Int?
+    var isArchived: Bool?
+    var startDate: String?
+    var createdAt: String?
+    var updatedAt: String?
+
+    var accentColorHex: String { color ?? "00d4aa" }
+    var displayIcon: String { icon ?? "🔥" }
 
     enum CodingKeys: String, CodingKey {
         case id, name, description, icon, color, frequency
@@ -35,9 +48,105 @@ struct Habit: Codable, Identifiable {
         case longestStreak = "longest_streak"
         case completedToday = "completed_today"
         case totalCompleted = "total_completed"
+        case isArchived = "is_archived"
+        case startDate = "start_date"
+        case createdAt = "created_at"
+        case updatedAt = "updated_at"
+    }
+
+    var frequencyLabel: String {
+        switch frequency {
+        case .daily: return "Ежедневно"
+        case .weekly:
+            guard let days = targetDays, !days.isEmpty else { return "Еженедельно" }
+            let names = ["Вс","Пн","Вт","Ср","Чт","Пт","Сб"]
+            return days.sorted().compactMap { names[safe: $0] }.joined(separator: ", ")
+        case .interval:
+            let n = targetCount ?? 1
+            return "Каждые \(n) дн."
+        case .monthly: return "Ежемесячно"
+        case .custom: return "Особое"
+        }
     }
 }
 
+// MARK: - HabitLog
+
+struct HabitLog: Codable, Identifiable {
+    let id: Int
+    let habitId: Int?
+    let completedAt: String?
+    let note: String?
+
+    var dateOnly: String { String(completedAt?.prefix(10) ?? "") }
+
+    enum CodingKeys: String, CodingKey {
+        case id
+        case habitId = "habit_id"
+        case completedAt = "completed_at"
+        case note
+    }
+}
+
+// MARK: - HabitFreeze
+
+struct HabitFreeze: Codable, Identifiable {
+    let id: Int
+    let habitId: Int?
+    let startDate: String
+    let endDate: String
+
+    enum CodingKeys: String, CodingKey {
+        case id
+        case habitId = "habit_id"
+        case startDate = "start_date"
+        case endDate = "end_date"
+    }
+}
+
+// MARK: - HabitStats
+
+struct HabitStats: Codable {
+    let currentStreak: Int
+    let longestStreak: Int
+    let thisMonth: Int
+    let totalCompleted: Int?
+    let completionRate: Double?
+
+    var completionPercent: Int { Int((completionRate ?? 0) * 100) }
+
+    enum CodingKeys: String, CodingKey {
+        case currentStreak = "current_streak"
+        case longestStreak = "longest_streak"
+        case thisMonth = "this_month"
+        case totalCompleted = "total_completed"
+        case completionRate = "completion_rate"
+    }
+}
+
+// MARK: - HabitsOverallStats
+
+struct HabitsOverallStats: Codable {
+    let todayCompleted: Int?
+    let activeHabits: Int?
+
+    enum CodingKeys: String, CodingKey {
+        case todayCompleted = "today_completed"
+        case activeHabits = "active_habits"
+    }
+}
+
+// MARK: - CompletionDataPoint (for charts)
+
+struct CompletionDataPoint: Identifiable {
+    let id = UUID()
+    let date: Date
+    let rate: Double
+    let label: String
+}
+
+// MARK: - HabitLogRequest
+
 struct HabitLogRequest: Codable {
     var completedAt: String?
     var note: String?
@@ -46,3 +155,12 @@ struct HabitLogRequest: Codable {
         case note
     }
 }
+
+// MARK: - Safe Array Subscript
+
+extension Array {
+    subscript(safe index: Int) -> Element? {
+        guard index >= 0, index < count else { return nil }
+        return self[index]
+    }
+}