feat(ui): integrate KpiStatGrid for enhanced statistics display

Replaced existing KPI display implementations across multiple pages with the new KpiStatGrid component for a more consistent and visually appealing presentation of statistics. Updated the Backups, BGP, Certificates, Communities, Containers, Dashboard, and Data Collection pages to utilize the KpiStatGrid, improving the overall user experience and maintainability of the codebase. Additionally, added new dependencies in package.json for required libraries.

docs/ui-design-contract.md

@@ -20,6 +20,7 @@ Project lock: **`surface: frame`**. Ops / list / dashboard / detail / settings
 | Shell | https://reui.io/preview/base/app-shell-12 |
 | KPI | https://reui.io/preview/base/stats-12 · https://reui.io/docs/components/base/icon-tile |
 | Lists | https://reui.io/preview/base/data-grid-filtering-2 |
+| Server rail | https://reui.io/preview/base/list-9 · https://reui.io/docs/components/base/frame · https://reui.io/docs/components/base/icon-tile |
 | Settings | https://reui.io/preview/base/settings-16 · https://reui.io/preview/base/settings-3 |
 | Forms / Sheet | https://reui.io/preview/base/form-7 · https://reui.io/preview/base/sheet-8 |
 | Alert / Badge | https://reui.io/docs/components/base/alert · https://reui.io/docs/components/base/badge |
@@ -29,9 +30,11 @@ Project lock: **`surface: frame`**. Ops / list / dashboard / detail / settings
 
 | Component | Role |
 |-----------|------|
-| `KpiStatGrid` | Hybrid KPI (IconTile elevated `size-10.5`) |
+KPI: только `KpiStatGrid` (hybrid IconTile elevated `size-10.5`, эталон `/wireguard`). Не hand-roll Frame KPI.
 | `CodeExportSheet` | Экспорт кода (.rsc / .conf) — Sheet + Frame + ScrollArea |
 
+Переключение сервера (ops-контекст): **`ServerTileRail` + `ServerRailLayout`** (`w-60` = `--sidebar-width`). Desktop rail сворачивается (persist `mm:server-rail-collapsed`); mobile — Sheet. Не Combobox. Страницы: OSPF, Filters, GRE, Recursive Routes, WireGuard, Terminal, Certificates, Probes, **Firewall** (live `/api/firewall`). Combobox — generic primitive, не доменный селектор хостов.
+
 Слои:
 
 | Слой | Путь |
@@ -68,6 +71,7 @@ Project lock: **`surface: frame`**. Ops / list / dashboard / detail / settings
 - Дубль Copy в header + footer export sheet
 - Mixing Card и Frame на одном ops-экране
 - Radix-варианты docs — только Base UI (`base-nova`)
+- Combobox / toolbar-фильтр как переключатель сервера (SoT — `ServerTileRail`)
 
 ## License