The largest and last structural extraction in the SubscriptionPurchase
decomp. Moves the classic-mode purchase flow (period → traffic →
servers → devices → confirm) into a self-contained step wizard at
src/components/subscription/purchase/ClassicPurchaseWizard.tsx.
The wizard self-owns:
- the preview query (gated on confirm step + form open)
- the submitPurchase mutation
- all six pieces of wizard state (currentStep, selectedPeriod,
selectedTraffic, selectedServers, selectedDevices, showPurchaseForm)
- the steps memo + currentSelection memo + currentStepIndex/isFirst/isLast
- the init useEffect (seeds from classicOptions.selection)
- toggleServer / goToNextStep / goToPrevStep / resetPurchase / getStepLabel
- its own useCloseOnSuccessNotification handler (closes form + resets
step on global success notification) — replaces the parent's
handleCloseAllModals dependency for the classic flow
Parent shrinks to a pure orchestrator: route params, three top-level
queries (subscription, purchase-options, subscriptions-list), mode
detection, two pieces of tariffs-mode state, the success-notification
handler for the remaining tariff modals, and JSX that delegates to
the four extracted sub-components.
SubscriptionPurchase.tsx: 908 → 370 lines (-538).
Cumulative across the 5-step decomp: 2054 → 370 (-1684, -82%).
Drops 11 parent imports (useEffect, useMemo, useCallback, useMutation,
useQueryClient, useNavigate, PurchaseSelection, PeriodOption,
InsufficientBalancePrompt, CheckIcon, Twemoji, useCurrency,
usePromoDiscount, getErrorMessage, PurchaseStep).
