feat(FN-1171): add agent soul memory and employees workflows

- Add soul and memory fields to agent types and AgentStore with persistence/update test coverage
- Add dashboard routes and API helpers to fetch and update agent soul/memory data
- Extend AgentDetailView with Soul, Memory, and Employees tabs and rename children labels to employees
- Normalize employee route params for type safety and add focused route/component tests for the new flows

packages/dashboard/app/hooks/useAgentHierarchy.ts

@@ -68,7 +68,7 @@ function buildTree(agents: Agent[], expanded: Set<string>): AgentNode[] {
 }
 
 /**
- * Hook for managing agent hierarchy (parent-child relationships).
+ * Hook for managing agent hierarchy (manager-employee relationships).
  * Derives the tree structure from the `reportsTo` field on agents.
  * Expand/collapse state is persisted to localStorage.
  */