fix(widgets): clear search box on item select via empty displayValue

reka-ui's ComboboxRoot defaults resetSearchTermOnBlur=true. After ComboboxItem.onSelect, the root closes and ~1ms later triggers ComboboxInput's resetSearchTerm, which without an explicit displayValue prop writes rootModelValue.toString() — i.e. the selected item's id — into the input. Our v-model on the input propagates that into ctx.searchQuery, so reopening the dropdown shows the id in the search box and a single-item filtered list.

Pass displayValue={() => ''} on ComboboxInput so reset always writes '' instead. Smallest surface, contract sits right next to the v-model it's correcting.

src/renderer/extensions/vueNodes/widgets/components/RemoteCombo/Search.vue

@@ -18,6 +18,8 @@ if (!ctx) {
 }
 
 const { t } = useI18n()
+
+const emptyDisplayValue = () => ''
 </script>
 
 <template>
@@ -28,6 +30,7 @@ const { t } = useI18n()
     />
     <ComboboxInput
       v-model="ctx.searchQuery.value"
+      :display-value="emptyDisplayValue"
       :placeholder="placeholder ?? t('g.search')"
       class="w-full border-none bg-transparent text-xs text-base-foreground outline-none placeholder:text-muted-foreground"
       :aria-label="