feat(ui): show per-inbound live speed (#5261)

* feat(utils): add speedFormat utility and tests

* feat(inbounds): add InboundSpeedEntry type

* feat(inbounds): add speed column to inbound list

* feat(inbounds): show speed in inbound stats modal

* feat(inbounds): compute inbound speed from traffic deltas

* feat(inbounds): wire inbound speed through page

* feat(i18n): add speed translation for all locales

* refactor(inbounds): dedupe live-speed UI and harden formatting

Extract a shared InboundSpeedTag component and isActiveSpeed guard used by the speed column and stats modal, unify InboundSpeedEntry into a single type, and route speedFormat through sizeFormat.

Also guard sizeFormat against non-finite input (no more "NaN PB/s") and clear stale per-inbound speeds when a traffic poll returns no deltas.

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Co-authored-by: Sanaei <ho3ein.sanaei@gmail.com>

internal/web/translation/ru-RU.json

@@ -289,6 +289,7 @@
       "port": "Порт",
       "portMap": "Сопоставление портов",
       "traffic": "Трафик",
+      "speed": "Скорость",
       "details": "Подробнее",
       "transportConfig": "Транспорт",
       "expireDate": "Дата окончания",