feat(mobile): pull-to-refresh + polling on the dashboard - #587
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Turn the placeholder home route into a dashboard that stays fresh two ways. `lib/activity.ts` loads the account's native XLM balance and recent payments from Horizon; the pure `mapPayments` turns Horizon records into direction-aware activity rows. `hooks/usePolling.ts` is a ref-backed interval that re-fetches quietly every POLL_INTERVAL_MS without restarting on each render. The screen wraps its ScrollView in a RefreshControl so a pull refreshes balance + feed, and an unfunded account reads as a zero balance with no activity rather than an error. Closes Miracle656#462
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Summary
Keeps the mobile dashboard fresh both ways (backlog #34 / #462): an explicit pull gesture and quiet background polling of balance + activity.
Added / changed
lib/activity.ts—fetchDashboardData(publicKey)loads the account's native XLM balance and its 20 most recent payments from Horizon. The puremapPaymentsturns Horizonpayment/create_accountrecords into direction-aware activity rows (received-from / sent-to), dropping non-transfer ops. An unfunded account (Horizon 404) reads as a zero balance with no activity, not an error.hooks/usePolling.ts— a ref-backedsetInterval(the native stand-in for the web dashboard's service-worker polling) that re-fires everyPOLL_INTERVAL_MSand never restarts when the callback identity changes; always cleared on unmount / when disabled.app/index.tsx— the placeholder home route is now the dashboard: a balance card + activity feed inside aScrollViewwithRefreshControl(pull-to-refresh) and background polling while a wallet is present. Distinct loading / no-wallet / empty / error states.Testing
tsc --noEmit✅jest lib/__tests__/activity.test.ts✅ (6/6 — direction, counterparty, non-native asset code, create_account, non-transfer filtering, timestamp conversion)Closes #462