Align web vault updates with resource sync

webapp/src/lib/api/vault-sync.ts

@@ -51,6 +51,29 @@ export async function invalidateVaultCoreSyncSnapshot(cacheKey: string): Promise
   await clearCachedVaultCoreSnapshot(normalizedKey);
 }
 
+export async function saveVaultCoreSyncSnapshot(
+  cacheKey: string,
+  snapshot: VaultCoreSnapshot,
+  revisionStamp?: number | null
+): Promise<void> {
+  const normalizedKey = String(cacheKey || '').trim();
+  if (!normalizedKey) return;
+
+  const normalizedSnapshot = normalizeCachedSnapshot(snapshot);
+  const currentMemory = memoryVaultCoreCache.get(normalizedKey);
+  let nextRevisionStamp = Number(revisionStamp);
+  if (!Number.isFinite(nextRevisionStamp) || nextRevisionStamp <= 0) {
+    const cached = await loadCachedVaultCoreSnapshot(normalizedKey);
+    nextRevisionStamp = currentMemory?.revisionStamp || cached?.revisionStamp || Date.now();
+  }
+
+  memoryVaultCoreCache.set(normalizedKey, {
+    revisionStamp: nextRevisionStamp,
+    snapshot: normalizedSnapshot,
+  });
+  await saveCachedVaultCoreSnapshot(normalizedKey, nextRevisionStamp, normalizedSnapshot);
+}
+
 export async function loadVaultCoreSyncSnapshot(authedFetch: AuthedFetch, cacheKey: string): Promise<VaultCoreSnapshot> {
   const normalizedKey = String(cacheKey || '').trim();
   if (!normalizedKey) return { ciphers: [], folders: [], sends: [] };