Put the dual-bay sibling in the triage band, and fix the gage counterpart

The machine page opened with a dual-bay banner directly above a hero band saying
'Controlled by'. Both answer 'what am I looking at', so the sibling is now a chip
in the band. The band takes a generic extraitems prop rather than learning what
dualpath is - the pairing is resolved by the machines plugin, not from the
relationships endpoint.

MeasuringToolDetail filtered for a machine counterpart, but the import creates a
controls edge PC -> tool, so a gage's counterpart is a computer. It rendered
nothing on every metrology station that has a PC.

Verified on screen. Full suite 2178 passed, frontend 280 passed.

frontend/src/components/AssetTriageBand.vue

@@ -19,6 +19,20 @@
       </span>
     </div>
 
+    <div v-for="item in extraitems" :key="item.label" class="triage-item">
+      <span class="triage-label">{{ item.label }}</span>
+      <span class="triage-values">
+        <component
+          v-for="link in item.links"
+          :key="link.text"
+          :is="link.to ? 'router-link' : 'span'"
+          :to="link.to || undefined"
+          class="triage-chip"
+          :class="{ link: Boolean(link.to) }"
+        >{{ link.text }}</component>
+      </span>
+    </div>
+
     <div v-if="accessmethods && accessmethods.length" class="triage-item">
       <span class="triage-label">Remote access</span>
       <span class="triage-values">
@@ -86,7 +100,15 @@ const props = defineProps({
   // printer through usesprinter and defaultprinter. Hardcoding 'controls'
   // left the band blank on the printer page, which is the one page where the
   // link is not obvious from the asset itself.
-  relationshiptypes: { type: Array, default: () => ['controls'] }
+  relationshiptypes: { type: Array, default: () => ['controls'] },
+  // Triage facts a page knows but core cannot derive from a relationship
+  // edge. The machine page's dual-bay sibling is the case this exists for:
+  // it is resolved by the machines plugin, not from the relationships
+  // endpoint, and it used to sit in its own banner above the hero - two
+  // strips of chrome saying two halves of the same "what am I looking at".
+  // Shape: [{ label, links: [{ text, to }] }]. A link with no `to` renders
+  // as plain text rather than a dead chip.
+  extraitems: { type: Array, default: () => [] }
 })
 
 const machines = ref([])
@@ -102,6 +124,7 @@ const hasAnything = computed(() =>
   Boolean(slots.actions) ||
   Boolean(props.liveness) ||
   machines.value.length > 0 ||
+  props.extraitems.length > 0 ||
   (props.accessmethods && props.accessmethods.length > 0) ||
   Boolean(props.locationname)
 )