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/dashboard/DomainOverviewWidget.tsx

@@ -0,0 +1,46 @@
+import type { Task } from "@mosaic/shared";
+import { TaskStatus, TaskPriority } from "@mosaic/shared";
+
+interface DomainOverviewWidgetProps {
+  tasks: Task[];
+  isLoading: boolean;
+}
+
+export function DomainOverviewWidget({ tasks, isLoading }: DomainOverviewWidgetProps) {
+  if (isLoading) {
+    return (
+      <div className="bg-white rounded-lg shadow-sm border border-gray-200 p-6">
+        <div className="flex justify-center items-center">
+          <div className="animate-spin rounded-full h-6 w-6 border-b-2 border-gray-900"></div>
+          <span className="ml-3 text-gray-600">Loading overview...</span>
+        </div>
+      </div>
+    );
+  }
+
+  const stats = {
+    total: tasks.length,
+    inProgress: tasks.filter((t) => t.status === TaskStatus.IN_PROGRESS).length,
+    completed: tasks.filter((t) => t.status === TaskStatus.COMPLETED).length,
+    highPriority: tasks.filter((t) => t.priority === TaskPriority.HIGH).length,
+  };
+
+  const StatCard = ({ label, value, color }: { label: string; value: number; color: string }) => (
+    <div className={`p-4 rounded-lg bg-gradient-to-br ${color}`}>
+      <div className="text-3xl font-bold text-white mb-1">{value}</div>
+      <div className="text-sm text-white/90">{label}</div>
+    </div>
+  );
+
+  return (
+    <div className="bg-white rounded-lg shadow-sm border border-gray-200 p-6">
+      <h2 className="text-lg font-semibold text-gray-900 mb-4">Domain Overview</h2>
+      <div className="grid grid-cols-2 gap-4">
+        <StatCard label="Total Tasks" value={stats.total} color="from-blue-500 to-blue-600" />
+        <StatCard label="In Progress" value={stats.inProgress} color="from-green-500 to-green-600" />
+        <StatCard label="Completed" value={stats.completed} color="from-purple-500 to-purple-600" />
+        <StatCard label="High Priority" value={stats.highPriority} color="from-red-500 to-red-600" />
+      </div>
+    </div>
+  );
+}