fix(ui): выровнять IconTile chrome и доступность

Перевести KPI и агентские тайлы на IconTile, skip-link и live regions.

Co-authored-by: Cursor <[email protected]>

apps/web/src/lib/ui-surface.ts

@@ -1,2 +1,6 @@
 /** Project surface lock — ops screens use ReUI Frame only. */
 export const UI_SURFACE = 'frame' as const
+
+/** Skip link — keyboard: first Tab. */
+export const SKIP_TO_CONTENT_CLASS =
+  'bg-background text-foreground ring-ring sr-only focus:not-sr-only focus:absolute focus:top-2 focus:left-2 focus:z-50 focus:rounded-md focus:px-3 focus:py-2 focus:text-sm focus:font-medium focus:shadow-sm focus:ring-2'