Report the owner's model and index on a mirror's Monitor card

A mirror was probing an Ollama it does not have and an index it never builds,
so the card read "unreachable / not built" about the wrong machine while the
model it actually uses was up. The card now names whose figures it is showing.

Plugin/unraid/pages/monitor.php

@@ -31,7 +31,9 @@
 //       No GPU, no UPS, no VMs — the corresponding card is absent rather than showing zeros
 //       or an error. The page is built to be correct on hardware lacking any given part. The
 //       AI row is the same rule applied to a subsystem rather than a device: it exists only
-//       where vv_ai_ui_on() is true, which is the AI host with AI_ENABLED set.
+//       where vv_ai_ui_on() is true, which is any node in the mesh with AI_ENABLED set. On a
+//       node that is not the AI owner the figures describe the owner's model and index, and the
+//       card names it — see 'served_by' in vv_ai_monitor_block().
 //
 //   The assistant here starts on General Chat, where the AI tab starts on Varaverk Assistant.
 //       Different jobs. The tab is where you go to interrogate the installation; this is the
@@ -310,10 +312,11 @@ $_vv_doc_vars = array_merge(vv_conf_vars(), ['SCRIPTS_DIR' => SCRIPTS_DIR]);
      Cards here size to their content instead. -->
 <div id="vv-monitor-ai">
     <!-- AI residency | Saved conversations | Assistant -->
-    <!-- Present only on the AI host with AI_ENABLED true, on the same footing as the GPU and UPS
+    <!-- Present on any mesh node with AI_ENABLED true, on the same footing as the GPU and UPS
          cards above: a subsystem that is not here does not render an empty card explaining that
-         it is not here. api/ai.php refuses every action independently, so this is presentation
-         rather than access control. -->
+         it is not here. On a node that is not the AI owner these figures describe the owner's
+         model and index, and the card names it. api/ai.php gates each action independently, so
+         this is presentation rather than access control. -->
 
     <!-- Placement for this row lives in css/varaverk.css, not on these cards. It is two rows
          deep — AI over Tokens in the first column — and a grid-column span here cannot say which
@@ -2010,6 +2013,14 @@ function vvRenderAi(ai) {
     if (ix.stale) h += `<div style="font-size:10px;color:#8a6a3a;margin:-2px 0 7px;">source newer — reindex</div>`;
   }
 
+  // Only set on a node that is not the AI owner. Everything above then describes that owner's
+  // model and index, not this box's, and the card has to say so — otherwise a mirror looks like
+  // it is running a model it does not have.
+  if (ai.served_by) {
+    h += `<div style="font-size:10px;color:#666;margin-top:6px;border-top:1px solid #1e1e1e;padding-top:5px;">`
+       + `served by ${vvEscHtml(ai.served_by)}</div>`;
+  }
+
   box.innerHTML = h;
 }