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

packages/ui/src/components/Card.tsx

@@ -0,0 +1,57 @@
+import type { ReactNode } from "react";
+
+export interface CardProps {
+  children: ReactNode;
+  className?: string;
+  id?: string;
+  onMouseEnter?: () => void;
+  onMouseLeave?: () => void;
+}
+
+export interface CardHeaderProps {
+  children: ReactNode;
+  className?: string;
+}
+
+export interface CardContentProps {
+  children: ReactNode;
+  className?: string;
+}
+
+export interface CardFooterProps {
+  children: ReactNode;
+  className?: string;
+}
+
+export function Card({ children, className = "", id, onMouseEnter, onMouseLeave }: CardProps) {
+  return (
+    <div
+      id={id}
+      onMouseEnter={onMouseEnter}
+      onMouseLeave={onMouseLeave}
+      className={`bg-white rounded-lg shadow-md border border-gray-200 ${className}`}
+    >
+      {children}
+    </div>
+  );
+}
+
+export function CardHeader({ children, className = "" }: CardHeaderProps) {
+  return (
+    <div className={`px-6 py-4 border-b border-gray-200 ${className}`}>
+      {children}
+    </div>
+  );
+}
+
+export function CardContent({ children, className = "" }: CardContentProps) {
+  return <div className={`px-6 py-4 ${className}`}>{children}</div>;
+}
+
+export function CardFooter({ children, className = "" }: CardFooterProps) {
+  return (
+    <div className={`px-6 py-4 border-t border-gray-200 bg-gray-50 rounded-b-lg ${className}`}>
+      {children}
+    </div>
+  );
+}