Add promo group banner (green) and active discount banner (orange) to
gift subscription page. PeriodCard now shows original price strikethrough
and discount percentage badge from server-calculated values.
- Fix Russian device count declension (_one/_few/_many)
- Show traffic GB and tariff description in buy tab
- Replace copy/share buttons with share modal (bot + cabinet links)
- GiftResult: code-only success state with formatted share message
- Support ?tab=activate&code=TOKEN for auto-activation via cabinet link
- Add is_code_only + purchase_token to API types
- Remove recipient input from buy flow (code-only gifts)
- 3-tab UI: Buy, Activate, My Gifts with animations
- After purchase, switch to My Gifts tab to show gift code
- Gift code display with copy/share buttons
- Activate tab: enter gift code to activate subscription
- My Gifts tab: sent/received gifts with status badges
- Fix: use navigator.language instead of hardcoded ru-RU for dates
- Fix: spread array before sort to prevent React Query cache mutation
- Fix: ARIA tab linkage with proper id/aria-labelledby
- Fix: guard VITE_BOT_USERNAME against undefined in share URLs
- Fix: wrap clipboard/share fallbacks in try/catch
- Add error state to MyGiftsTabContent
- Add warning field to GiftPurchaseStatus type
- Read warning from status response with URL param fallback
- Show PollErrorState for all poll errors (softer UX for gateway payments)
- Handle expired status in GiftResult (stop polling + show FailedState)
- Add PollErrorState for balance mode poll errors (softer UX)
- Remove non-null assertions in handleSubmit (explicit narrowing)
- Wrap gift routes in ErrorBoundary
- Add pollErrorTitle/pollErrorDesc i18n keys to all 4 locales
