fix mail send via tenant management

src/Agent/AutopilotMonitor.Agent/buildcounter.txt

@@ -1 +1 @@
-376
+377

src/Backend/AutopilotMonitor.Functions/Functions/Rules/PreviewWhitelistFunction.cs

@@ -208,6 +208,7 @@ public class PreviewWhitelistFunction
     /// <summary>
     /// POST /api/preview/send-welcome-email/{tenantId}
     /// Sends (or resends) the Private Preview welcome email. Galactic Admin only.
+    /// Accepts optional { email } in body — if provided, saves it to tenant config before sending.
     /// </summary>
     [Function("SendPreviewWelcomeEmail")]
     [Authorize]
@@ -219,6 +220,16 @@ public class PreviewWhitelistFunction
         // Authentication + GalacticAdminOnly authorization enforced by PolicyEnforcementMiddleware
 
         var tenantConfig = await _tenantConfigurationService.GetConfigurationAsync(tenantId);
+
+        // If the caller provides an email in the body, save it first
+        var body = await req.ReadFromJsonAsync<SaveNotificationEmailRequest>();
+        var bodyEmail = body?.Email?.Trim();
+        if (!string.IsNullOrWhiteSpace(bodyEmail))
+        {
+            tenantConfig.PreviewNotificationEmail = bodyEmail;
+            await _tenantConfigurationService.SaveConfigurationAsync(tenantConfig);
+        }
+
         var email = tenantConfig.PreviewNotificationEmail;
 
         if (string.IsNullOrWhiteSpace(email))

src/Web/autopilot-monitor-web/app/admin-configuration/components/TenantManagementSection.tsx

@@ -170,7 +170,7 @@ export function TenantManagementSection({
     }
   };
 
-  const handleSendWelcomeEmail = async (tenantId: string) => {
+  const handleSendWelcomeEmail = async (tenantId: string, email?: string) => {
     try {
       setSendingWelcomeEmail(true);
       setError(null);
@@ -179,7 +179,11 @@ export function TenantManagementSection({
       const response = await authenticatedFetch(
         `${API_BASE_URL}/api/preview/send-welcome-email/${tenantId}`,
         getAccessToken,
-        { method: "POST" }
+        {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({ email: email || "" }),
+        }
       );
 
       if (!response.ok) {
@@ -531,7 +535,7 @@ export function TenantManagementSection({
                     className="flex-1 px-3 py-2 border border-gray-300 rounded-lg text-sm text-gray-900 placeholder-gray-500 focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 transition-colors"
                   />
                   <button
-                    onClick={() => handleSendWelcomeEmail(editingTenant.tenantId)}
+                    onClick={() => handleSendWelcomeEmail(editingTenant.tenantId, editingTenant.previewNotificationEmail)}
                     disabled={sendingWelcomeEmail || !editingTenant.previewNotificationEmail?.trim()}
                     className="px-3 py-2 text-sm font-medium text-white bg-indigo-600 rounded-lg hover:bg-indigo-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors whitespace-nowrap flex items-center gap-1.5"
                     title="Send or resend the Private Preview welcome email"