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>

plugins/warranty/api/routes.py

@@ -225,13 +225,16 @@ def sync_dell():
     and non-Dell serials are filtered out by Dell (they return no coverage).
     """
     provider = get_provider('dell')
+    # ?all=true re-checks assets that already have a dated warranty too.
+    recheck_all = request.args.get('all', 'false').lower() == 'true'
 
-    # Assets already covered by a dated warranty - skip these.
+    # Assets already covered by a dated warranty - skipped unless recheck_all.
     covered = set()
-    for link in WarrantyAsset.query.all():
-        w = Warranty.query.get(link.warrantyid)
-        if w and w.isactive and w.enddate:
-            covered.add(link.assetid)
+    if not recheck_all:
+        for link in WarrantyAsset.query.all():
+            w = Warranty.query.get(link.warrantyid)
+            if w and w.isactive and w.enddate:
+                covered.add(link.assetid)
 
     # Candidate assets: active, have a serial, not already covered.
     candidates = (Asset.query