feat: add gift subscription API client and feature flag

src/api/branding.ts

@@ -23,6 +23,10 @@ export interface EmailAuthEnabled {
   enabled: boolean;
 }
 
+export interface GiftEnabled {
+  enabled: boolean;
+}
+
 export interface TelegramWidgetConfig {
   bot_username: string;
   size: 'large' | 'medium' | 'small';
@@ -251,6 +255,16 @@ export const brandingApi = {
     return response.data;
   },
 
+  // Get gift enabled (public, no auth required)
+  getGiftEnabled: async (): Promise<GiftEnabled> => {
+    try {
+      const response = await apiClient.get<GiftEnabled>('/cabinet/branding/gift-enabled');
+      return response.data;
+    } catch {
+      return { enabled: false };
+    }
+  },
+
   // Get analytics counters (public, no auth required)
   getAnalyticsCounters: async (): Promise<AnalyticsCounters> => {
     try {

src/api/gift.ts

@@ -0,0 +1,87 @@
+import apiClient from './client';
+
+// Types
+
+export interface GiftTariffPeriod {
+  days: number;
+  price_kopeks: number;
+  price_label: string;
+  original_price_kopeks: number | null;
+  discount_percent: number | null;
+}
+
+export interface GiftTariff {
+  id: number;
+  name: string;
+  description: string | null;
+  traffic_limit_gb: number;
+  device_limit: number;
+  periods: GiftTariffPeriod[];
+}
+
+export interface GiftPaymentMethodSubOption {
+  id: string;
+  name: string;
+}
+
+export interface GiftPaymentMethod {
+  method_id: string;
+  display_name: string;
+  description: string | null;
+  icon_url: string | null;
+  min_amount_kopeks: number | null;
+  max_amount_kopeks: number | null;
+  sub_options: GiftPaymentMethodSubOption[] | null;
+}
+
+export interface GiftConfig {
+  is_enabled: boolean;
+  tariffs: GiftTariff[];
+  payment_methods: GiftPaymentMethod[];
+  balance_kopeks: number;
+  currency_symbol: string;
+}
+
+export interface GiftPurchaseRequest {
+  tariff_id: number;
+  period_days: number;
+  recipient_type: 'email' | 'telegram';
+  recipient_value: string;
+  gift_message?: string;
+  payment_mode: 'balance' | 'gateway';
+  payment_method?: string;
+}
+
+export interface GiftPurchaseResponse {
+  status: string;
+  purchase_token: string;
+  payment_url: string | null;
+}
+
+export interface GiftPurchaseStatus {
+  status: string;
+  is_gift: boolean;
+  recipient_contact_value: string | null;
+  gift_message: string | null;
+  tariff_name: string | null;
+  period_days: number | null;
+}
+
+// API
+
+export const giftApi = {
+  getConfig: async (): Promise<GiftConfig> => {
+    const { data } = await apiClient.get<GiftConfig>('/cabinet/gift/config');
+    return data;
+  },
+
+  createPurchase: async (request: GiftPurchaseRequest): Promise<GiftPurchaseResponse> => {
+    const { data } = await apiClient.post<GiftPurchaseResponse>('/cabinet/gift/purchase', request);
+    return data;
+  },
+
+  getPurchaseStatus: async (token: string): Promise<GiftPurchaseStatus> => {
+    const { data } = await apiClient.get<GiftPurchaseStatus>(`/cabinet/gift/purchase/${token}`);
+    return data;
+  },
+};

src/hooks/useFeatureFlags.ts

@@ -1,5 +1,6 @@
 import { useQuery } from '@tanstack/react-query';
 import { useAuthStore } from '@/store/auth';
+import { brandingApi } from '@/api/branding';
 import { referralApi } from '@/api/referral';
 import { wheelApi } from '@/api/wheel';
 import { contestsApi } from '@/api/contests';
@@ -40,10 +41,19 @@ export function useFeatureFlags() {
     retry: false,
   });
 
+  const { data: giftConfig } = useQuery({
+    queryKey: ['gift-enabled'],
+    queryFn: brandingApi.getGiftEnabled,
+    enabled: isAuthenticated,
+    staleTime: 60000,
+    retry: false,
+  });
+
   return {
     referralEnabled: referralTerms?.is_enabled,
     wheelEnabled: wheelConfig?.is_enabled,
     hasContests: (contestsCount?.count ?? 0) > 0,
     hasPolls: (pollsCount?.count ?? 0) > 0,
+    giftEnabled: giftConfig?.enabled,
   };
 }