Fix E_WARNING: array offset on null $INFO in _htmlform()

[eduardomozart]

$INFO is not initialized in CLI contexts (e.g., aichat's createEmbeddings), causing E_WARNING: Trying to access array offset on null when _htmlform() unconditionally accesses $INFO['id'].

Changes

• syntax.php — _htmlform(): Guard $INFO['id'] with isset(), falling back to $ID — consistent with the same pattern already used in prepareNamespacetemplateReplacements() (line 578)

// Before
$form->addHidden('id', $INFO['id']);

// After
global $ID;
$localid = isset($INFO['id']) ? $INFO['id'] : $ID;
$form->addHidden('id', $localid);