ADR-013 Phase 3: migrate all detail pages to PluginAssetPanels; drop WarrantyPanel

Rolls the generic renderer into the remaining four detail pages (PCDetail,
PrinterDetail, NetworkDeviceDetail, MeasuringToolDetail), replacing the
hand-composed <WarrantyPanel> with <PluginAssetPanels>. The warranty hero badge
(useWarrantyBadge) stays on the pages that show it; MeasuringToolDetail dropped
its now-unused warranty composable usage.

WarrantyPanel.vue is deleted - warranty now renders entirely from its
get_asset_panels JSON declaration through the generic renderer. Verified live on
a PC with a warranty: the card is identical to the old bespoke panel (vendor
title, Expiring Soon status badge with color, servicelevel/ends/tag meta, manage
link) with no warranty-specific frontend code. Build clean, 58 vitest, naming green.

frontend/src/views/pcs/PCDetail.vue

@@ -210,7 +210,7 @@
           <CustomFieldsSection :assetid="computer.assetid" />
 
           <!-- Warranty -->
-          <WarrantyPanel :assetid="computer.assetid" :items="warranties" />
+          <PluginAssetPanels :assetid="computer.assetid" />
 
           <!-- All relationships (controls, defaultprinter, ...) -->
           <AssetRelationships v-if="computer.assetid" :assetid="computer.assetid" />
@@ -244,7 +244,7 @@ import { computersApi, applicationsApi } from '../../api'
 import { useWarrantyBadge } from '../../composables/warrantyBadge'
 import LocationMapTooltip from '../../components/LocationMapTooltip.vue'
 import CustomFieldsSection from '../../components/CustomFieldsSection.vue'
-import WarrantyPanel from '../../components/WarrantyPanel.vue'
+import PluginAssetPanels from '../../components/PluginAssetPanels.vue'
 import AssetRelationships from '../../components/AssetRelationships.vue'
 import { useIdentifierFlags } from '../../composables/identifierSettings'
 
@@ -256,7 +256,7 @@ const computer = ref(null)
 const installedApps = ref([])
 
 // Warranty fetch + hero badge (shared across asset detail pages).
-const { warranties, heroWarranty, warrantyDate: formatWarrantyDate } = useWarrantyBadge(() => computer.value?.assetid)
+const { heroWarranty, warrantyDate: formatWarrantyDate } = useWarrantyBadge(() => computer.value?.assetid)
 
 // relationships render via the shared AssetRelationships card