Add HR agent onboarding model and actor enforcement

frontend/src/api/mutator.ts

@@ -1,3 +1,17 @@
+
+function getActorId(): string | undefined {
+  if (typeof window !== "undefined") {
+    const stored = window.localStorage.getItem("actor_employee_id");
+    if (stored) return stored;
+    const env = process.env.NEXT_PUBLIC_ACTOR_EMPLOYEE_ID;
+    if (env) {
+      window.localStorage.setItem("actor_employee_id", env);
+      return env;
+    }
+    return undefined;
+  }
+  return process.env.NEXT_PUBLIC_ACTOR_EMPLOYEE_ID;
+}
 export async function customFetch<T>(
   url: string,
   options: RequestInit,
@@ -9,6 +23,7 @@ export async function customFetch<T>(
     ...options,
     headers: {
       "Content-Type": "application/json",
+      ...(getActorId() ? { "X-Actor-Employee-Id": String(getActorId()) } : {}),
       ...(options.headers ?? {}),
     },
   });