Warranty polish: hero badges everywhere, search/pagination, re-check, shared apiError

- Shared utils/apiError.js reads the correct nested error message (with
  fallbacks); swept 37 views/components off the shallow path so real backend
  messages (e.g. in-use 409s) surface instead of generic "Failed".
- useWarrantyBadge composable: warranty hero status/end-date badge now on PC,
  equipment, printer, and network detail heroes (one shared fetch feeds the
  badge + the WarrantyPanel).
- Warranties list: client-side search (vendor/level/tag/asset) + pagination;
  truncate long service levels so they stop blowing out the table width.
- "Re-check all" button + POST /warranty/sync/dell?all=true to re-pull dated
  Dell warranties, not just missing ones.
- Deprecate the standalone pxe-images/warranty_sync.py in favor of the plugin.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/views/reports/WarrantyReport.vue

@@ -33,7 +33,7 @@
             <tbody>
               <tr v-for="w in buckets[b.key]" :key="w.warrantyid">
                 <td><strong>{{ w.vendor }}</strong></td>
-                <td>{{ w.servicelevel || '-' }}</td>
+                <td class="servicelevel-cell" :title="w.servicelevel">{{ w.servicelevel || '-' }}</td>
                 <td>{{ w.enddate ? formatDate(w.enddate) : '-' }}</td>
                 <td>
                   <router-link v-for="a in w.assets" :key="a.assetid" :to="assetLink(a)" class="asset-chip">{{ a.assetnumber }}</router-link>
@@ -100,4 +100,5 @@ onMounted(async () => {
   background: var(--bg); border-radius: 12px; font-size: 0.8rem; text-decoration: none; color: var(--text);
 }
 .muted { color: var(--text-light); }
+.servicelevel-cell { max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 </style>