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/bar_chart.md

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+---
+name: bar_chart
+kind: component
+lang: ts
+domain: ui
+version: "1.1.0"
+purity: impure
+signature: "BarChart(props: BarChartProps): JSX.Element"
+description: "Gráfico de barras @mantine/charts con multi-series, orientación horizontal/vertical y tooltips."
+tags: [chart, bar, visualization, mantine, component, ui]
+uses_functions: [chart_container_ts_ui]
+uses_types: [ChartSeries_ts_ui]
+returns: []
+returns_optional: false
+error_type: ""
+imports: ["@mantine/charts", "@mantine/core"]
+output: "Componente JSX que renderiza un gráfico de barras vertical u horizontal con multi-series y tooltips"
+tested: false
+tests: []
+test_file_path: ""
+file_path: "frontend/functions/ui/bar_chart.tsx"
+props:
+  - name: data
+    type: "Record<string, unknown>[]"
+    required: true
+    description: "Array de datos"
+  - name: xKey
+    type: "string"
+    required: true
+    description: "Key del eje X/categoría"
+  - name: horizontal
+    type: "boolean"
+    required: false
+    description: "Orientación horizontal"
+  - name: series
+    type: "Series[]"
+    required: false
+    description: "Series de datos para multi-series"
+emits: []
+has_state: false
+framework: react
+variant: [vertical, horizontal]
+source_repo: "https://gitea-dgg044oo04woo4ggcsws4gk0.organic-machine.com/Bl4cksmith/Frontend_Library"
+source_license: "MIT"
+source_file: "frontend/src/components/ui/charts/bar-chart.tsx"
+---
+
+## Ejemplo
+
+```tsx
+<BarChart data={data} xKey="category" yKey="sales" showLegend />
+<BarChart data={data} xKey="name" series={series} horizontal />
+```
+
+## Notas
+
+En modo `horizontal=true` se pasa `orientation="vertical"` a Mantine BarChart, que internamente intercambia los ejes.