feat: deploy infrastructure + disk/drive, calendar, presentation, workspaces, onboarding, demo user

flutter/lib/models/tariff.dart

@@ -0,0 +1,39 @@
+class Tariff {
+  final String id;
+  final String name;
+  final double price;
+  final String currency;
+  final Map<String, dynamic> features;
+  final bool isActive;
+  final DateTime createdAt;
+
+  Tariff({
+    required this.id,
+    required this.name,
+    required this.price,
+    this.currency = 'RUB',
+    required this.features,
+    this.isActive = true,
+    required this.createdAt,
+  });
+
+  factory Tariff.fromJson(Map<String, dynamic> json) => Tariff(
+        id: json['id'] as String,
+        name: json['name'] as String,
+        price: (json['price'] as num).toDouble(),
+        currency: json['currency'] as String? ?? 'RUB',
+        features: json['features'] as Map<String, dynamic>? ?? {},
+        isActive: json['is_active'] as bool? ?? true,
+        createdAt: DateTime.parse(json['created_at'] as String),
+      );
+
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'name': name,
+        'price': price,
+        'currency': currency,
+        'features': features,
+        'is_active': isActive,
+        'created_at': createdAt.toIso8601String(),
+      };
+}