Let one gate decide every AI surface, so switching AI off actually removes all of it

The Tools card adopted the AI scripts on the host check alone, and api/ai.php only
tested AI_ENABLED in front of ask, so a disabled subsystem still had rows to run and
an endpoint that answered.

Plugin/unraid/pages/scheduler.php

@@ -70,10 +70,11 @@ $_vv_doc_vars = array_merge(vv_conf_vars(), [
 ]);
 
 // The assistant dock renders only where the AI tab itself would: HOST1, with AI_ENABLED true.
-// Same two conditions, checked the same way, so the page cannot offer a chat the endpoint will
-// refuse — api/ai.php 404s every action off HOST1 regardless of what this page draws.
-$_vv_ai_on = vv_is_ai_host()
-          && strtolower(trim(vv_conf_vars()['AI_ENABLED'] ?? 'false')) === 'true';
+// The same gate function, not a second copy of the condition, so the page cannot offer a chat
+// the endpoint will refuse — api/ai.php rejects every action on both counts regardless of what
+// this page draws. With it false the dock markup is never emitted, and every caller into the
+// dock is guarded by vvAiDockOn(), which reads the element's absence.
+$_vv_ai_on = vv_ai_ui_on();
 
 // Setup mode — auto-open a conf file and force the editing sequence
 $vv_setup_conf = preg_match('/^[\w.]+\.conf$/', $_GET['vv_setup'] ?? '')