feat(agents): Add identity and soul template fields to board creation

frontend/src/app/agents/new/page.tsx

@@ -9,6 +9,7 @@ import { DashboardSidebar } from "@/components/organisms/DashboardSidebar";
 import { DashboardShell } from "@/components/templates/DashboardShell";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
+import { getApiBaseUrl } from "@/lib/api-base";
 import {
   Select,
   SelectContent,
@@ -17,9 +18,7 @@ import {
   SelectValue,
 } from "@/components/ui/select";
 
-const apiBase =
-  process.env.NEXT_PUBLIC_API_URL?.replace(/\/+$/, "") ||
-  "http://localhost:8000";
+const apiBase = getApiBaseUrl();
 
 type Agent = {
   id: string;