Make a partly-undone import retryable, and refuse a plan it cannot deliver

frontend/src/views/settings/BrandingSettings.vue

@@ -24,7 +24,7 @@
             >
             <div class="map-upload-row">
               <input type="file" :accept="logo.accept" @change="uploadLogo(logo.kind, logo.key, $event)" :disabled="brandingUploading" />
-              <img v-if="settings[logo.key]" :src="settings[logo.key]" class="map-thumb" :alt="logo.label" />
+              <img v-if="settings[logo.key]" :src="withBase(settings[logo.key])" class="map-thumb" :alt="logo.label" />
             </div>
             <small class="input-hint">{{ logo.hint }}</small>
           </label>
@@ -132,6 +132,12 @@
 <script setup>
 import { onMounted } from 'vue'
 import { useSystemSettings, brandingLogos } from '../../composables/systemSettings'
+// The stored value is root-relative ('/ge-aerospace-logo.svg'). This app is
+// mounted under a base path at every real deployment (/shopdb, /ops), so a raw
+// src resolves against the SERVER root and 404s - which is what "error loading
+// image" was. siteSettings.js already wraps every logo this way for the rest of
+// the app; this preview was the one place that did not.
+import { withBase } from '@/utils/basePath'
 
 const {
   settings, saving, brandingUploading, error, success,