Fix model images 404 under a subpath mount (withBase)

Model image URLs are root-relative (/api/models/image/...), so on an /ops
subpath deploy the raw <img src> resolved to the server root and 404'd. Wrap
every model-image src in withBase(): machine/printer/PC/network detail heroes,
the models settings preview, and the machine-badge / asset-label print pages.
withBase leaves external http(s)/data URLs untouched.

plugins/machines/frontend/views/MachineDetail.vue

@@ -32,7 +32,7 @@
       <!-- Hero Section -->
       <div class="hero-card">
         <div class="hero-image" v-if="machine.machine?.imageurl">
-          <img :src="machine.machine.imageurl" :alt="machine.machine.modelname || 'Model photo'" />
+          <img :src="withBase(machine.machine.imageurl)" :alt="machine.machine.modelname || 'Model photo'" />
         </div>
         <div class="hero-content">
           <div class="hero-title">
@@ -235,6 +235,7 @@
 import { ref, onMounted } from 'vue'
 import { useRoute } from 'vue-router'
 import { machinesApi } from '@/api'
+import { withBase } from '@/utils/basePath'
 import LocationMapTooltip from '@/components/LocationMapTooltip.vue'
 import CustomFieldsSection from '@/components/CustomFieldsSection.vue'
 import PluginAssetPanels from '@/components/PluginAssetPanels.vue'