- health probe: tolerant timeout (12s) + retry before flagging the backend down. A
hardcoded 5s probe racing auth bootstrap falsely showed ServiceUnavailableScreen on
slow devices / cold mobile connections while the 30s API requests would have
succeeded ("works on one device, not another on the same Wi-Fi"). The recovery poll
self-reschedules with the tolerant timeout so slow devices auto-recover.
- TopUpAmount: fetch payment methods with a real query (fixes the infinite spinner on a
cold cache / browser-back) and use canonical RUB for quick-amount chips so FX rounding
can't reject a min-amount selection in non-RUB locales.
- settings UI: render secret values as a masked password input (pairs with the backend
secret masking); leaving the field empty keeps the stored secret.
- deps: npm audit fix (18 -> 5 advisories).
Also bundles in-progress settings env-lock UI work.
- Replace flat sidebar with collapsible tree groups (7 groups, 52 sub-items)
- Map all 61 backend category keys to sidebar navigation
- Add QuickToggles panel for boolean settings
- Replace card-style SettingRow with compact SettingsTableRow
- Add breadcrumb navigation for tree sub-items
- Add source badges (modified/DB/ENV) on settings
- Implement two-level mobile navigation with group chips
- Add i18n translations for all new keys (en, ru, zh, fa)
