feat: add domains, ideas, layouts, widgets API modules

- Add DomainsModule with full CRUD, search, and activity logging
- Add IdeasModule with quick capture endpoint
- Add LayoutsModule for user dashboard layouts
- Add WidgetsModule for widget definitions (read-only)
- Update ActivityService with domain/idea logging methods
- Register all new modules in AppModule

apps/web/src/components/hud/index.ts

@@ -0,0 +1,12 @@
+/**
+ * HUD components
+ */
+
+export { HUD } from "./HUD";
+export { WidgetGrid } from "./WidgetGrid";
+export { WidgetWrapper } from "./WidgetWrapper";
+export { WidgetRenderer } from "./WidgetRenderer";
+export type { WidgetWrapperProps } from "./WidgetWrapper";
+export type { WidgetGridProps } from "./WidgetGrid";
+export type { HUDProps } from "./HUD";
+export type { WidgetRendererProps } from "./WidgetRenderer";