Introduced GPT/AI service, added dashboard widgets, drag and drop, export import.

frontend/src/components/widgets/registry.ts

@@ -0,0 +1,19 @@
+import type { ComponentType } from 'react'
+import type { WidgetConfig, WidgetType } from '../../hooks'
+
+import LineChartWidget from './LineChartWidget'
+import StatWidget from './StatWidget'
+import GaugeWidget from './GaugeWidget'
+import AiInsightWidget from './AiInsightWidget'
+
+interface WidgetProps {
+  config: WidgetConfig
+}
+
+export const widgetRegistry: Record<WidgetType, ComponentType<WidgetProps>> = {
+  'line-chart': LineChartWidget,
+  'stat': StatWidget,
+  'gauge': GaugeWidget,
+  'ai-insight': AiInsightWidget,
+  'bar-chart': LineChartWidget, // Placeholder - implement later
+}