Issue 50927: Custom dates broken in peptide heat map view (#1010)

Author: ankurjuneja

resources/views/peptideSummary.html

@@ -311,16 +311,20 @@
 
     function customDateRange() {
         $('#fom-loading').show();
-        if (document.getElementById("ps-start-date").value) {
-            startDate = formatDate(document.getElementById("ps-start-date").value);
-        }
-        if (document.getElementById("ps-end-date").value) {
-            endDate = formatDate(document.getElementById("ps-end-date").value);
-        }
-        if (document.getElementById("ps-start-date").value && document.getElementById("ps-end-date").value) {
-            persistDateRange(-1);
-            getData();
+        const startDateVal = document.getElementById('ps-start-date').value;
+        const endDateVal = document.getElementById('ps-end-date').value;
+
+        if (!startDateVal || !endDateVal) {
+            alert('Please select both start and end dates.');
+            $('#fom-loading').hide();
+            return;
         }
+
+        startDate = formatDate(startDateVal);
+        endDate = formatDate(endDateVal);
+
+        persistDateRange(-1);
+        getData();
     }
 
     function formatDate(d, includeTime) {