fix: guard against undefined fields when loading old localStorage data

Old entries in localStorage lack new fields (department, role, contactPersons,
linkedEntryIds, attachments, versions, placeholders, ipAddress, vendor, model).
Add null-coalescing guards to prevent client-side crashes on property access.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/modules/registratura/hooks/use-registry.ts

@@ -76,8 +76,9 @@ export function useRegistry() {
     const entry = entries.find((e) => e.id === id);
     if (!entry) return;
     await updateEntry(id, { status: 'inchis' });
-    if (closeLinked && entry.linkedEntryIds.length > 0) {
-      for (const linkedId of entry.linkedEntryIds) {
+    const linked = entry.linkedEntryIds ?? [];
+    if (closeLinked && linked.length > 0) {
+      for (const linkedId of linked) {
         const linked = entries.find((e) => e.id === linkedId);
         if (linked && linked.status !== 'inchis') {
           const updatedLinked: RegistryEntry = {