fix(helpdesk): remove unavailable fields from LV ticket query

PBI_LV_Tickets does not expose Description or Company_Contact_Name —
BC returns HTTP 400 on unknown select fields. Revert to original LV
field set. Description falls back to Category_1_Code. Customer column
shows Customer_No when Company_Contact_Name is unavailable. Show API
error message in UI for debugging.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/helpdesk/web/js/helpdesk-team.js

@@ -206,7 +206,15 @@ if (container) {
       const res = await fetch(dataUrl + '?' + params.toString(), { credentials: 'same-origin' });
       const json = await res.json();
 
-      if (!json.ok) { showState('error'); return; }
+      if (!json.ok) {
+        console.error('[helpdesk-team] API error:', json.error || json);
+        if (elError) {
+          const p = elError.querySelector('p');
+          if (p && json.error) p.textContent = json.error;
+        }
+        showState('error');
+        return;
+      }
       if (!json.members || json.members.length === 0) { showState('empty'); return; }
 
       renderCurrentTab(json.members);