enhanced client results and export functionality with coach and supervisor details, added date filters for results

handlers/export.php

@@ -39,9 +39,13 @@ foreach ($questionIDs as $qid) {
 
 $sql = "
     SELECT cl.clientCode, cl.coachID,
+           co.username AS coachUsername,
+           sv.username AS supervisorUsername,
            cq.status, cq.sumPoints, cq.startedAt, cq.completedAt
     FROM client cl
     INNER JOIN completed_questionnaire cq ON cq.clientCode = cl.clientCode AND cq.questionnaireID = :qnid
+    LEFT JOIN coach co ON co.coachID = cl.coachID
+    LEFT JOIN supervisor sv ON sv.supervisorID = co.supervisorID
     WHERE $rbacClause
     ORDER BY cl.clientCode
 ";
@@ -61,7 +65,8 @@ $rows = [];
 foreach ($clients as $c) {
     $row = [
         'clientCode'  => $c['clientCode'],
-        'coachID'     => $c['coachID'],
+        'coach'       => $c['coachUsername'] ?? $c['coachID'],
+        'supervisor'  => $c['supervisorUsername'] ?? '',
         'status'      => $c['status'],
         'sumPoints'   => $c['sumPoints'],
         'startedAt'   => $c['startedAt'] ? date('Y-m-d H:i', (int)$c['startedAt']) : '',