refactor: update UI components to utilize Frame for improved layout and consistency

Refactored multiple components, including PanelCard, SettingsCard, and DataGridShell, to replace Card with Frame for better organization and presentation. Enhanced the DataGridToolbar to support optional ReUI filters and improved the overall structure of the KPI stat grid. Updated .gitignore to include .env.local for local environment configurations, ensuring better management of environment variables.

AGENTS.md

@@ -71,4 +71,6 @@ pnpm --filter @evobgp/web run build
 
 Стек: React 19, TanStack Router/Query, shadcn/ui (base-nova, registry `@shadcn` + `@reui`), Tailwind v4, lucide-react. Legacy Svelte — в `web-legacy-svelte/` (архив, только референс при миграции).
 
-UI-задачи начинаются с MCP `plugin-shadcn-shadcn` (search → examples → add command), затем CLI `pnpm dlx shadcn@latest add ...` из `apps/web`. См. также [.cursor/rules/context7-stack.mdc](.cursor/rules/context7-stack.mdc) для Context7 ID стека.
+**UI design contract:** [`docs/ui-design-contract.md`](docs/ui-design-contract.md) — surface `frame`, kit `apps/web/src/components/reui-kit/`.
+
+UI-задачи начинаются с MCP `user-reui` (`surface: "frame"`) + `plugin-shadcn-shadcn`, затем CLI `pnpm dlx shadcn@latest add ...` из `apps/web`. См. также [.cursor/rules/context7-stack.mdc](.cursor/rules/context7-stack.mdc) для Context7 ID стека.