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/sales.ts

@@ -0,0 +1,32 @@
+import apiClient from './client'
+
+export type SalesLeadSource = 'pricing_page' | 'register_footer' | 'landing_page'
+
+export interface SalesLeadCreatePayload {
+  email: string
+  name: string
+  company: string
+  team_size?: string
+  message?: string
+  source: SalesLeadSource
+  posthog_distinct_id?: string
+}
+
+export interface SalesLeadCreateResponse {
+  id: string
+  status: 'received'
+}
+
+export const salesApi = {
+  /**
+   * Public Talk-to-Sales submission. No auth required. Rate-limited per IP
+   * server-side (5/hour). Server emits PostHog `talk_to_sales_form_submitted`
+   * — frontend should NOT also fire this event.
+   */
+  async createLead(payload: SalesLeadCreatePayload): Promise<SalesLeadCreateResponse> {
+    const response = await apiClient.post<SalesLeadCreateResponse>('/sales-leads', payload)
+    return response.data
+  },
+}
+
+export default salesApi