initial: mirror of @fn_library from fn_registry

75 components + DESIGN_SYSTEM.md + sync script.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

components/popover.md

@@ -0,0 +1,66 @@
+---
+name: popover
+kind: component
+lang: ts
+domain: ui
+version: "1.0.0"
+purity: impure
+signature: "Popover(props: PopoverProps): JSX.Element"
+description: "Contenido flotante posicionado accesible con animaciones. Mantine Popover."
+tags: [popover, component, ui, interactive, overlay, mantine]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: ["@mantine/core", react]
+output: "Componente Popover que renderiza contenido flotante accesible posicionado automáticamente via Mantine Popover"
+tested: false
+tests: []
+test_file_path: ""
+file_path: "frontend/functions/ui/popover.tsx"
+props:
+  - name: open
+    type: "boolean"
+    required: false
+    description: "Estado controlado de apertura"
+  - name: defaultOpen
+    type: "boolean"
+    required: false
+    description: "Estado inicial de apertura (no controlado)"
+  - name: onOpenChange
+    type: "(open: boolean) => void"
+    required: false
+    description: "Callback cuando cambia el estado de apertura"
+  - name: sideOffset
+    type: "number"
+    required: false
+    description: "Distancia en px entre trigger y popover (default: 4)"
+emits: [onOpenChange]
+has_state: false
+framework: react
+variant: []
+---
+
+## Ejemplo
+
+```tsx
+<Popover>
+  <PopoverTrigger asChild>
+    <Button variant="outline">Abrir</Button>
+  </PopoverTrigger>
+  <PopoverContent>
+    <PopoverHeader>
+      <PopoverTitle>Configuracion</PopoverTitle>
+      <PopoverDescription>Ajusta tus preferencias.</PopoverDescription>
+    </PopoverHeader>
+    <div className="mt-4">
+      {/* contenido */}
+    </div>
+  </PopoverContent>
+</Popover>
+```
+
+## Notas
+
+Compuesto de: Popover (root), PopoverTrigger, PopoverContent, PopoverClose, PopoverHeader, PopoverTitle, PopoverDescription. El posicionamiento automatico lo maneja Mantine Popover. PopoverPortal es un no-op mantenido por compatibilidad.