feat: self-serve signup Phase 2 (frontend cutover) (#162)

Co-authored-by: Michael Chihlas <michael@resolutionflow.com>
Co-committed-by: Michael Chihlas <michael@resolutionflow.com>

frontend/src/api/accounts.ts

@@ -1,6 +1,22 @@
 import apiClient from './client'
 import type { Account, SubscriptionDetails, AccountMember, AccountInvite } from '@/types'
 
+export interface BulkInviteRow {
+  email: string
+  role: 'engineer' | 'viewer'
+  expires_in_days?: number
+}
+
+export interface BulkInviteFailure {
+  email: string
+  error: string
+}
+
+export interface BulkInviteResponse {
+  created: AccountInvite[]
+  failed: BulkInviteFailure[]
+}
+
 export const accountsApi = {
   async getMyAccount(): Promise<Account> {
     const response = await apiClient.get<Account>('/accounts/me')
@@ -39,6 +55,18 @@ export const accountsApi = {
     return response.data
   },
 
+  /**
+   * Create multiple invites in one call (used by the welcome wizard step 3).
+   * Per-row failures land in `failed[]`; successes in `created[]`.
+   */
+  async bulkInvite(invites: BulkInviteRow[]): Promise<BulkInviteResponse> {
+    const response = await apiClient.post<BulkInviteResponse>(
+      '/accounts/me/invites/bulk',
+      { invites },
+    )
+    return response.data
+  },
+
   async getInvites(): Promise<AccountInvite[]> {
     const response = await apiClient.get<AccountInvite[]>('/accounts/me/invites')
     return response.data