Extend agent editor with department and budget fields

UpdateAgentInput now includes department and budgetCents. The edit dialog
on the Team page shows department and monthly budget alongside the
existing role, title, seniority, provider, and model fields.

AgentCompany-New/src/shared/commands.ts

@@ -42,6 +42,8 @@ export interface UpdateAgentInput {
   role: string;
   title: string;
   roleLevel: string;
+  department: string;
+  budgetCents: number;
   modelProviderId: string | null;
   modelId: string | null;
 }