fix(ci): null-safe pending IP in SearchModal + bump python-multipart

- SearchModal.tsx: same null-IP guard as SearchBar; also search by
  friendly_name and ieee_address. Fixes Docker CI typecheck.
- python-multipart 0.0.26 -> 0.0.27 (CVE-2026-42561). Fixes
  Security pip-audit.

frontend/src/components/modals/SearchModal.tsx

@@ -33,8 +33,10 @@ export function SearchModal({ open, onClose, onOpenPending }: SearchModalProps)
   ).slice(0, 6)
 
   const pendingResults = q.length === 0 ? [] : pendingDevices.filter((d) =>
-    d.ip.toLowerCase().includes(q) ||
+    d.ip?.toLowerCase().includes(q) ||
     d.hostname?.toLowerCase().includes(q) ||
+    d.friendly_name?.toLowerCase().includes(q) ||
+    d.ieee_address?.toLowerCase().includes(q) ||
     d.services.some((s) =>
       s.service_name?.toLowerCase().includes(q) ||
       s.category?.toLowerCase().includes(q)