init: rapid_dashboards app from fn_registry

frontend/src/env.d.ts

@@ -0,0 +1,18 @@
+/// <reference types="vite/client" />
+
+// Types for @fn_library — resolved at build time via Vite alias to frontend/functions/ui/
+declare module '@fn_library' {
+  import type { FC } from 'react'
+  export const Card: FC<any>
+  export const CardContent: FC<any>
+  export const CardHeader: FC<any>
+  export const CardTitle: FC<any>
+  export const KPICard: FC<any>
+  export const Sparkline: FC<any>
+  export const Badge: FC<any>
+  export const Button: FC<any>
+  export const Input: FC<any>
+  export const Skeleton: FC<any>
+  export interface SimpleSelectOption { value: string; label: string; disabled?: boolean }
+  export function SimpleSelect(props: { value: string; onValueChange: (value: string) => void; options: SimpleSelectOption[]; placeholder?: string; disabled?: boolean; size?: 'sm' | 'default'; className?: string }): React.ReactElement
+}