Frontend naming + CSS-variable cleanups (review low)

Naming convention (LOCKED): rename the ManifestEditor simulate state sim ->
simulateInputs / simResult -> simulateResult (+ .sim-result CSS class) - 'sim'
was banned standalone shorthand. Rename AssetRelationships props assetId ->
assetid and machineNumber -> machinenumber so a prop holding a DB field value
mirrors it verbatim; updated the five detail-page call sites (:assetid=).

CSS variables: SearchResults per-domain badge palette moved into CSS variables
on the container; the duplicated prefers-color-scheme dark block collapses to a
single set of variable overrides instead of restating all ten selectors.

frontend build green; vitest 49 pass; naming green; search badges + detail
relationships verified rendering with no console errors.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/views/network/NetworkDeviceDetail.vue

@@ -154,7 +154,7 @@
         <!-- Relationships -->
         <AssetRelationships
           v-if="device.assetid"
-          :assetId="device.assetid"
+          :assetid="device.assetid"
         />
 
         <!-- Notes -->