Refactor authentication API service to TypeScript

app/src/types/api.ts

@@ -5,3 +5,55 @@ declare global {
 }
 
 export const API_BASE_URL = window.API_BASE_URL;
+
+/**
+ * User role in the system
+ */
+export enum UserRole {
+  Admin = 'admin',
+  Editor = 'editor',
+  Viewer = 'viewer'
+}
+
+/**
+ * User model from the API
+ */
+export interface User {
+  id: number;
+  email: string;
+  displayName?: string;
+  role: UserRole;
+  createdAt: string;
+  lastWorkspaceId: number;
+}
+
+/**
+ * Error response from the API
+ */
+export interface ErrorResponse {
+  message: string;
+}
+
+/**
+ * Login request parameters
+ */
+export interface LoginRequest {
+  email: string;
+  password: string;
+}
+
+/**
+ * Login response from the API
+ */
+export interface LoginResponse {
+  user: User;
+  sessionId: string;
+  expiresAt: string;
+}
+
+/**
+ * API call options extending the standard RequestInit
+ */
+export interface ApiCallOptions extends RequestInit {
+  headers?: HeadersInit;
+}