SEction 4 completeed

frontend/src/services/billing.api.ts

@@ -818,6 +818,45 @@ export async function updateAccountSettings(data: Partial<AccountSettings>): Pro
   });
 }
 
+// ============================================================================
+// PROFILE & SECURITY
+// ============================================================================
+
+export interface UserProfile {
+  id: number;
+  email: string;
+  username?: string;
+  first_name: string;
+  last_name: string;
+  phone?: string;
+  timezone?: string;
+  language?: string;
+  email_notifications?: boolean;
+  marketing_emails?: boolean;
+}
+
+export async function getUserProfile(): Promise<{ user: UserProfile }> {
+  return fetchAPI('/v1/auth/me/');
+}
+
+export async function updateUserProfile(data: Partial<UserProfile>): Promise<{ user: UserProfile }> {
+  // User profile updates go through users endpoint
+  return fetchAPI('/v1/auth/users/me/', {
+    method: 'PATCH',
+    body: JSON.stringify(data),
+  });
+}
+
+export async function changePassword(oldPassword: string, newPassword: string): Promise<{ message: string }> {
+  return fetchAPI('/v1/auth/change-password/', {
+    method: 'POST',
+    body: JSON.stringify({
+      old_password: oldPassword,
+      new_password: newPassword,
+    }),
+  });
+}
+
 export interface UsageAnalytics {
   period_days: number;
   start_date: string;