feat: add business line permissions and Wayne namespace mapping

frontend/src/api/user.ts

@@ -0,0 +1,23 @@
+import { getToken } from '@/utils/auth'
+
+export interface UserOption {
+  uid: number
+  username: string
+}
+
+export const userApi = {
+  async list(): Promise<UserOption[]> {
+    const token = getToken()
+    const response = await fetch('/auth/api/v1/users', {
+      headers: {
+        Accept: 'application/json',
+        ...(token ? { Authorization: `Bearer ${token}` } : {}),
+      },
+    })
+    const data = await response.json().catch(() => ({}))
+    if (!response.ok) {
+      throw new Error(data.error || `HTTP ${response.status}`)
+    }
+    return Array.isArray(data.items) ? data.items : []
+  },
+}