Resolved reply recipient userId from TenantUsers and enabled Beneficiary compliance exploration modal

PostFundManagement.PartnerUI/src/components/dashboard/DashboardPage.tsx

@@ -46,6 +46,7 @@ import {
   getContractSecureLink,
   getEvidenceSecureLink,
   submitActivityForApproval,
+  resolveUserIdByEmail,
 } from '../../services/api';
 import {
   ApplicantData,
@@ -490,7 +491,7 @@ export function DashboardPage() {
     return (user?.email || (user as any)?.profile?.email || '') || (user as any)?.email || 'Partner User';
   };
 
-  const handleReplyToMessage = (notification: Notification) => {
+  const handleReplyToMessage = async (notification: Notification) => {
     const senderEmail = getMessageSenderEmail(notification).trim().toLowerCase();
     const currentUserEmail = (
       (user?.email || (user as any)?.profile?.email || '') ||
@@ -510,11 +511,20 @@ export function DashboardPage() {
       ? notification.subject
       : `Re: ${notification.subject || 'Message'}`;
 
+    // Requirement #1: Resolve sender's user ID from TenantUsers by email
+    let senderUserId: string | undefined = undefined;
+    if (senderEmail) {
+      senderUserId = await resolveUserIdByEmail(
+        senderEmail,
+        notification.organisationId || partnerSummary.primaryFundingOrg?.id || 1
+      );
+    }
+
     setContactTarget({
       organisation: partnerSummary.primaryFundingOrg,
       projectTitle: replySubject,
       recipientEmail: senderEmail,
-      recipientId: notification.recipient,
+      recipientId: senderUserId,
     });
     setMessageSubject(replySubject);
     setMessageBody('');
@@ -1281,10 +1291,11 @@ export function DashboardPage() {
             await sendMessage({
               recipientEmail: targetEmail,
               recipient: targetEmail,
+              recipientId: contactTarget.recipientId,
               subject: subj,
               message: markdown,
               platform: NotificationPlatform.InApp,
-              organisationId: partnerSummary.primaryFundingOrg?.id || undefined,
+              organisationId: contactTarget.organisation?.id || partnerSummary.primaryFundingOrg?.id || 1,
             });
 
             showSuccessToast('Message Sent', `Your communication was delivered to ${targetEmail}.`);