Add shared empty states, customer product filters, and SSO handoff across dashboards.

Standardize list empty UI, searchable country fields, customer-products filter row, password/login polish, and one-time business dashboard handoff from the customer app.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/services/authService.ts

@@ -79,6 +79,15 @@ export async function updateProfile(payload: {
   })
 }
 
+export async function consumeHandoff(ticket: string) {
+  const data = await apiRequest<LoginResponse>('/auth/handoff/consume', {
+    method: 'POST',
+    body: { ticket },
+  })
+  setTokens(data.accessToken, data.refreshToken)
+  return data
+}
+
 export function logout() {
   clearTokens()
   clearActiveBusiness()