Fix: IPD discharge template delete not working

ISSUE: Delete button executed but did not actually delete templates
ROUTE: /setting/template/discharge_templates/delete/{id}

ROOT CAUSE:
The delete button's fetch() call was sending 'new FormData(form)' which:
1. Included entire edit form data (template_html, header_html, footer_html)
2. These are HUGE LONGTEXT fields that can cause request payload issues
3. CSRF token from form might be stale or missing if no template is being edited
4. Server received malformed request and silently failed

SOLUTION:
- Create fresh FormData with ONLY the CSRF token
- Delete request now lightweight and reliable
- Added success message display after successful delete
- Server-side delete logic already correct (line 2969-3028 in Template.php)

CHANGED:
- app/Views/Setting/Template/discharge_templates.php (line 618-653)
  - Replace: body: new FormData(form)
  - With: body: deleteFormData (contains only CSRF token)
  - Added: setNotice('success', ...) to show success message

TESTING:
1. Go to /setting/template/discharge_templates
2. Click Delete on any non-default template
3. Confirm deletion
4. Template should now be removed from list
5. Success message should display

app/Views/Setting/Template/discharge_templates.php

@@ -626,9 +626,13 @@ $status = (int) ($edit['status'] ?? 1);
                 return;
             }
 
+            // Create fresh FormData with only CSRF token
+            var deleteFormData = new FormData();
+            deleteFormData.append('<?= csrf_token() ?>', '<?= csrf_hash() ?>');
+
             fetch('<?= base_url('setting/template/discharge_templates/delete') ?>/' + id, {
                 method: 'POST',
-                body: new FormData(form),
+                body: deleteFormData,
                 headers: {
                     'X-Requested-With': 'XMLHttpRequest'
                 }
@@ -641,6 +645,8 @@ $status = (int) ($edit['status'] ?? 1);
                         return;
                     }
 
+                    setNotice('success', data.error_text || 'Template deleted successfully.');
+
                     if (typeof load_form_div === 'function') {
                         load_form_div('<?= base_url('setting/template/discharge_templates') ?>', 'maindiv', 'IPD Discharge Template');
                     } else {