feat: hook up the request to the send mail form

packages/webapp/src/containers/Sales/Invoices/InvoiceSendMailDrawer/_hooks.ts

@@ -0,0 +1,18 @@
+import { useFormikContext } from 'formik';
+import { chain } from 'lodash';
+import { InvoiceSendMailFormValues } from './_types';
+
+export const useInvoiceMailItems = () => {
+  const { values } = useFormikContext<InvoiceSendMailFormValues>();
+  const cc = values?.cc || [];
+  const bcc = values?.bcc || [];
+
+  return chain([...values?.to, ...cc, ...bcc])
+    .filter((email) => !!email?.trim())
+    .uniq()
+    .map((email) => ({
+      value: email,
+      text: email,
+    }))
+    .value();
+};