[Init] Initial commit - NetMesh terminal manager

infrastructure/syncHelpers.ts

@@ -0,0 +1,25 @@
+import type { KnownHost } from '../domain/models';
+import { STORAGE_KEY_KNOWN_HOSTS } from './config/storageKeys';
+import { localStorageAdapter } from './persistence/localStorageAdapter';
+
+/**
+ * Get effective knownHosts for local vault payloads.
+ *
+ * If the hook/state knownHosts is empty but localStorage has data,
+ * read from localStorage so local backups do not miss entries while
+ * async store initialization is still settling.
+ */
+export function getEffectiveKnownHosts(
+  knownHostsFromState: KnownHost[] | undefined,
+): KnownHost[] | undefined {
+  if (knownHostsFromState && knownHostsFromState.length > 0) {
+    return knownHostsFromState;
+  }
+
+  const stored = localStorageAdapter.read<KnownHost[]>(STORAGE_KEY_KNOWN_HOSTS);
+  if (stored && Array.isArray(stored) && stored.length > 0) {
+    return stored;
+  }
+
+  return knownHostsFromState;
+}