Add threshold inputs (total GB/day, per-node GB/day) to admin traffic
usage page. When set, rows get background color gradation (green to red)
and node cells get text color (blue to red) based on threshold ratios.
Conditional Risk column shows composite risk badge with level indicator.
7 i18n keys added across all 4 locales (ru, en, zh, fa).
- Add NodeFilter component with flag emojis and checkbox dropdown
- Add StatusFilter component with colored status dots
- Add custom date range picker (calendar toggle, from/to date inputs)
- Wire all filters to backend params (nodes, statuses, start_date, end_date)
- CSV export passes all active filters and date range
- Add displayNodes memo for table column filtering
- Add i18n keys for nodes, statuses, dates in ru/en/zh/fa
- Add NodeFilter dropdown with flag emojis and checkbox selection
- Add StatusFilter dropdown with colored status dots
- Add DateRangePicker with From/To date inputs, toggle from period mode
- Devices column now shows N/M (connected/limit) with accent color
- Export CSV passes all active filters to backend
- New i18n keys for nodes, statuses, dates in ru/en/zh/fa
- Add 5-min in-memory cache in API layer keyed by request params
- Replace blocking spinner with animated progress bar during refresh
- Keep stale data visible while fetching (opacity dim)
- Prefetch all periods in background for instant switching
- TariffFilter dropdown with checkboxes for filtering by tariff
- Column resizing via TanStack Table resize handles
- Add allTariffs locale key to all 4 languages
- Pass tariffs param to API
Add AdminTrafficUsage page showing per-user traffic statistics by node
with period filtering (1/3/7/14/30d), server-side sorting, search,
pagination, and CSV export. Uses @tanstack/react-table with manual
sorting and dynamic node columns.
